abv441 service manual dvd & vhs, lg
DESCRIPTION
Abv441, Service manual, DVD & VHS, LG, ELECTRICAL ADJUSTMENT PROCEDURES, ELECTRICAL TROUBLESHOOTING, POWER(SMPS) CIRCUIT, SYSTEM/KEY CIRCUIT, SERVO CIRCUIT, OSD CIRCUIT, Y/C CIRCUIT, Hi-Fi CIRCUIT, Tuner/IF CIRCUIT, BLOCK DIAGRAMS.TRANSCRIPT
CONTENTSSECTION 1 . . . . SUMMARYSECTION 2 . . . . CABINET & MAIN CHASSISSECTION 3 . . . . ELECTRICALSECTION 4 . . . . MECHANISM OF VCR PARTSECTION 5 . . . . MECHANISM OF DVD PARTSECTION 6 . . . . REPLACEMENT PARTS LIST
SECTION 1
SUMMARY
CONTENTS
PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS ............. 1-3SERVICING PRECAUTIONS .................................................................................................. 1-4
• General Servicing Precautions• Insulation Checking Prodedure• Electrostatically Sensitive Devices
SPECIFICATIONS ...................................................................................................................... 1-5
1-3
CAUTION : DO NOT ATTEMPT TO MODIFY THIS PRODUCT IN ANY WAY,NEVER PERFORM CUSTOMIZED INSTALLATIONS WITHOUT MANUFAC-TURER’S APPROVAL. UNAUTHORIZED MODIFICATIONS WILL NOT ONLYVOID THE WARRANTY, BUT MAY LEAD TO YOUR BEING LIABLE FOR ANYRESULTING PROPERTY DAMAGE OR USER INJURY.SERVICE WORK SHOULD BE PERFORMED ONLY AFTER YOU ARETHOROUGHLY FAMILIAR WITH ALL OF THE FOLLOWING SAFETYCHECKS AND SERVICING GUIDELINES. TO DO OTHERWISE,INCREASES THE RISK OF POTENTIAL HAZARDS AND INJURY TO THEUSER.WHILE SERVICING, USE AN ISOLATION TRANSFORMER FOR PROTEC-TION FROM A.C. LINE SHOCK.
SAFETY CHECKSAFTER THE ORIGINAL SERVICE PROBLEM HAS BEEN CORRECTED. ACHECK SHOULD BE MADE OF THE FOLLOWING.
SUBJECT : FIRE & SHOCK HAZARD1. BE SURE THAT ALL COMPONENTS ARE POSITIONED IN SUCH A WAY
AS TO AVOID POSSIBILITY OF ADJACENT COMPONENT SHORTS.THIS IS ESPECIALLY IMPORTANT ON THOSE MODULES WHICH ARETRANSPORTED TO AND FROM THE REPAIR SHOP.
2. NEVER RELEASE A REPAIR UNLESS ALL PROTECTIVE DEVICESSUCH AS INSULATORS, BARRIERS, COVERS, SHIELDS, STRAIN RELIEFS, POWER SUPPLY CORDS, AND OTHER HARDWARE HAVEBEEN REINSTALLED PER ORIGINAL DESIGN. BE SURE THAT THESAFETY PURPOSE OF THE POLARIZED LINE PLUG HAS NOT BEENDEFEATED.
3. SOLDERING MUST BE INSPECTED TO DISCOVER POSSIBLE COLDSOLDER JOINTS, SOLDER SPLASHES OR SHARP SOLDER POINTS.BE CERTAIN TO REMOVE ALL LOOSE FOREIGN PARTICLES.
4. CHECK FOR PHYSICAL EVIDENCE OF DAMAGE OR DETERIORATIONTO PARTS AND COMPONENTS. FOR FRAYED LEADS, DAMAGEDINSULATION (INCLUDING A.C. CORD). AND REPLACE IF NECESSARYFOLLOW ORIGINAL LAYOUT, LEAD LENGTH AND DRESS.
5. NO LEAD OR COMPONENT SHOULD TOUCH A RECIVING TUBE ORA RESISTOR RATED AT 1 WATT OR MORE. LEAD TENSION AROUNDPROTRUNING METAL SURFACES MUST BE AVOIDED.
6. ALL CRITICAL COMPONENTS SUCH AS FUSES, FLAMEPROOFRESISTORS, CAPACITORS, ETC. MUST BE REPLACED WITH EXACTFACTORY TYPES, DO NOT USE REPLACEMENT COMPONENTSOTHER THAN THOSE SPECIFIED OR MAKE UNRECOMMENDED CIR-CUIT MODIFICATIONS.
7. AFTER RE-ASSEMBLY OF THE SET ALWAYS PERFORM AN A.C.LEAKAGE TEST ON ALL EXPOSED METALLIC PARTS OF THE CABI-NET, (THE CHANNEL SELECTOR KNOB, ANTENNA TERMINALS. HAN-DLE AND SCREWS) TO BE SURE THE SET IS SAFE TO OPERATEWITHOUT DANGER OF ELECTRICAL SHOCK. DO NOT USE A LINE ISOLATION TRANSFORMER DURING THIS TEST USE AN A.C. VOLT-METER, HAVING 5000 OHMS PER VOLT OR MORE SENSITIVITY, INTHE FOLLOWING MANNER; CONNECT A 1500 OHM 10 WATT RESIS-TOR, PARALLELED BY A .15 MFD. 150.V A.C TYPE CAPACITORBETWEEN A KNOWN GOOD EARTH GROUND (WATER PIPE, CON-DUIT, ETC.) AND THE EXPOSED METALLIC PARTS, ONE AT A TIME.MEASURE THE A.C. VOLTAGE ACROSS THE COMBINATION OF 1500 OHM RESISTOR AND .15 MFD CAPACITOR. REVERSE THE A.C. PLUGAND REPEAT A.C. VOLTAGE MEASUREMENTS FOR EACH EXPOSED METALLIC PART. VOLTAGE MEASURED MUST NOT EXCEED 75VOLTS R.M.S. THIS CORRESPONDS TO 0.5 MILLIAMP A.C ANYVALUE EXCEEDING THIS LIMIT CONSTITUTES A POTENTIAL SHOCKHAZARD AND MUST BE CORRECTED IMMEDIATELY.
SUBJECT: GRAPHIC SYMBOLSTHE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHINAN EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THESERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED“DANGEROUS VOLTAGE” THAT MAY BE OF SUFFICIENT MAG-NITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK.THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIAN-GLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TOTHE PRESENCE OF IMPORTANT SAFETY INFORMATION INSERVICE LITERATURE.
SUBJECT : X-RADIATION1. BE SURE PROCEDURES AND INSTRUCTIONS TO ALL SERVICE PER-
SONNEL COVER THE SUBJECT OF X-RADIATION. THE ONLY POTEN-TIAL SOURCE OF X-RAYS IN CURRENT T.V. RECEIVERS IS THE PIC-TURE TUBE. HOWEVER, THIS TUBE DOES NOT EMIT X-RAYS WHENTHE HIGH VOLTAGE IS AT THE FACTORY SPECIFIED LEVEL. THE PROPER VALUE IS GIVEN IN THE APPLICABLE SCHEMATIC. OPERA-TION AT HIGHER VOLTAGES MAY CAUSE A FAILURE OF THE PIC-TURE TUBE OR HIGH VOLTAGE SUPPLY AND, UNDER CERTAIN CIR-CUMSTANCES, MAY PRODUCE RADIATION IN EXCESS OF DESIR-ABLE LEVELS.
2. ONLY FACTORY SPECIFIED C.R.T. ANODE CONNECTORS MUST BEUSED. DEGAUSSING SHIELDS ALSO SERVE AS X-RAY SHIELD INCOLOR SETS, ALWAYS RE-INSTALL THEM.
3. IT IS ESSNTIAL THAT SERVICE PERSONNEL HAVE AVAILABLE ANACCURATE AND RELIABLE HIGH VOLTAGE METER. THE CALIBRATION OF THE METER SHOULD BE CHECKED PERIODICALLYAGAINST A REFERENCE STANDARD, SUCH AS THE ONE AVAILABLEAT YOUR DISTRIBUTOR.
4. WHEN THE HIGH VOLTAGE CIRCUITRY IS OPERATING PROPERLYTHERE IS NO POSSIBILITY OF AN X-RADIATION PROBLEM. EVERYTIME A COLOR CHASSIS IS SERVICED. THE BRIGHTNESS SHOULDBE RUN UP AND DOWN WHILE MONITORING THE HIGH VOLTAGEWITH A METER TO BE CERTAIN THAT THE HIGH VOLTAGE DOESNOT EXCEED THE SPECIFIED VALUE AND THAT IT IS REGULATINGCORRECTLY, WE SUGGEST THAT YOU AND YOUR SERVICE ORGA-NIZATION REVIEW TEST PROCEDURES SO THAT VOLTAGE REGU-LATION IS ALWAYS CHECKED AS A STANDARD SERVICING PROCE-DURE. AND THAT THE HIGH VOLTAGE READING BE RECORDER ONEACH CUSTOMER’S INVOICE.
5. WHEN TROUBLESHOOTING AND MAKING TEST MEASUREMENTS INA PRODUCT WITH A PROBLEM OF EXCESSIVE HIGH VOLTAGE,AVOID BEING UNNECESSARILY CLOSE TO THE PICTURE TUBE ANDTHE HIGH VOLTAGE SUPPLY. DO NOT OPERATE THE PRODUCTLONGER THAN IS NECESSARY TO LOCATE THE CAUSE OF EXCESSIVE VOLTAGE.
6. REFER TO HV. B+ AND SHUTDOWN ADJUSTMENT PROCEDURES DESCRIBED IN THE APPROPRIATE SCHEMATIC AND DIAGRAMS(WHERE USED).
SUBJECT: IMPLOSION1. ALL DIRECT VIEWED PICTURE TUBES ARE EQUIPPED WITH AN INTE
GRAL IMPLOSION PROTECTION SYSTEM, BUT CARE SHOULD BETAKEN TO AVOID DAMAGE DURING INSTALLATION, AVOIDSCRATCHING THE TUBE. IF SCRATCHED REPLACE IT.
2. USE ONLY RECOMMENDED FACTORY REPLACEMENT TUBES.SUBJECT : TIPS ON PROPER INSTALLATION1. NEVER INSTALL ANY PRODUCT IN A CLOSED-IN RECESS, CUBBY-
HOLE OR CLOSELY FITTING SHELF SPACE. OVER OR CLOSE TOHEAT DUCT, OR IN THE PATH OF HEATED AIR FLOW.
2. AVOID CONDITIONS OF HIGH HUMIDITY SUCH AS: OUTDOOR PATIOINSTALLATIONS WHERE DEW IS A FACTOR, NEAR STEAM RADIA-TORS WHERE STEAM LEAKAGE IS A FACTOR, ETC.
3. AVOID PALCEMENT WHERE DRAPERIES MAY OBSTRUCT REARVENTING. THE CUSTOMER SHOULD ALSO AVOID THE USE OF DEC-ORATIVE SCARVES OR OTHER COVERINGS WHICH MIGHTOBSTRUCT VENTILATION.
4. WALL AND SHELF MOUNTED INSTALLATIONS USING A COMMER-CIAL MOUNTING KIT. MUST FOLLOW THE FACTORY APPROVED MOUNTING INSTRUCTIONS A PRODUCT MOUNTED TO A SHELF ORPLATFORM MUST RETAIN ITS ORIGINAL FEET (OR THE EQUIVALENTTHICKNESS IN SPACERS) TO PROVIDE ADEQUATE AIR FLOW ACROSS THE BOTTOM, BOLTS OR SCREWS USED FOR FASTENERSMUST NOT TOUCH ANY PARTS OR WIRING. PERFORM LEAKAGETEST ON CUSTOMIZED INSTALLATIONS.
5. CAUTION CUSTOMERS AGAINST THE MOUNTING OF A PRODUCT ONSLOPING SHELF OR A TILTED POSITION, UNLESS THE PRODUCT ISPROPERLY SECURED.
6. A PRODUCT ON A ROLL-ABOUT CART SHOULD BE STABLE ON ITSMOUNTING TO THE CART. CAUTION THE CUSTOMER ON THE HAZ-ARDS OF TRYING TO ROLL A CART WITH SMALL CASTERS ACROSSTHRESHOLDS OR DEEP PILE CARPETS.
7. CAUTION CUSTOMERS AGAINST THE USE OF A CART OR STANDWHICH HAS NOT BEEN LISTED BY UNDERWRITERS LABORATORIES, INC. FOR USE WITH THEIR SPECIFIC MODEL OF TELEVISION RECEIVER OR GENERICALLY APPROVED FOR USE WITH T.V.’S OFTHE SAME OR LARGER SCREEN SIZE.
8. CAUTION CUSTOMERS AGAINST THE USE OF EXTENSION CORDS, EXPLAIN THAT A FOREST OF EXTENSIONS SPROUTING FROM A SIN-GLE OUTLET CAN LEAD TO DISASTROUS CONSEQUENCES TOHOME AND FAMILY.
PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS
A.C. VOLTMETER
GOOD EARTH GROUNDSUCH AS THE WATERPIPE. CONDUIT. ETC
PLACE THIS PROBEON EACH EXPOSEDMETAL PART
1-4
SERVICING PRECAUTIONS
CAUTION : Before servicing the VCR+DVD covered by thisservice data and its supplements and addends, read and fol-low the SAFETY PRECAUTIONS. NOTE : if unforeseen cir-cumstances create conflict between the following servicingprecautions and any of the safety precautions in this publi-cations, always follow the safety precautions.Remembers Safety First:
General Servicing Precautions1. Always unplug the VCR+DVD AC power cord from the AC
power source before:(1) Removing or reinstalling any component, circuit board,
module, or any other assembly.(2) Disconnection or reconnecting any internal electrical
plug or other electrical connection.(3) Connecting a test substitute in parallel with an elec-
trolytic capacitor.Caution : A wrong part substitution or incorrect polarity installation of electrolytic capacitors may resultin an explosion hazard.
2. Do not spray chemicals on or near this VCR+DVD or anyof its assemblies.
3. Unless specified otherwise in this service data, cleanelectrical contacts by applying an appropriate contact cleaning solution to the contacts with a pipe cleaner,cotton-tipped swab, or comparable soft applicator.Unless specified otherwise in this service data, lubricationof contacts is not required.
4. Do not defeat any plug/socket B+ voltage interlocks withwhitch instruments covered by this service manual mightbe equipped.
5. Do not apply AC power to this VCR+DVD and/or any of itselectrical assemblies unless all solid-state device heatsinks are cerrectly installed.
6. Always connect test instrument ground lead to theappropriate ground before connection the test instrumentpositive lead. Always remove the test instrument ground lead last.
Insulation Checking ProcedureDisconnect the attachment plug from the AC outlet and turnthe power on. Connect an insulation resistance meter(500V)to the blades of the attachment plug. The insulation resis-tance between each blade of the attachment plug and acces-sible conductive parts (Note 1) should be more than 1M-ohm.Note 1 : Accessible Conductive Parts including Metal pan-els, Input terminals, Earphone jacks, etc.
Electrostatically Sensitive (ES) DevicesSome semiconductor (solid state) devices can be damagedeasily by static electricity. Such components commonly arecalled Electrostatically Sensitive (ES) Devices. Examples oftypical ES devices are integrated circuits and some fieldeffect transistors and semiconductor chip components.The following techniques should be used to help reduce theincidence of component damage caused by static electricity.
1. Immediately before handling any semiconductor compo-nent or semiconductor-equipped assembly, drain off anyelectrostatic charge on your body by touching a knownearth ground. Alternatively, obtain and wear a commer-cially available discharging wrist strap device, which should be removed for potential shock reasons prior to applying power to the unit under test.
2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.
3. Use only a grouned-tip soldering iron to solder or unsolderES devices.
4. Use only an anti-static solder removal device. Somesolder removal devices not classified a “anti-static” cangenerate electrical charges sufficient to damage ES devices.
5. Do not use freon-propelled chemicals. These cangenerate electrical charge sufficient to damage ESdevices.
6. Do not remove a replacement ES device from its protective package until immediately before you are ready toinstall it. (Most replacement ES devices are packaged withleads electrically shorted together by conductive foam,aluminum foil, or comparable conductive material).
7. Immediately before removing the protective material fromthe leads of a replacement ES device, touch the protectivematerial to the chassis or circuit assembly into which thedevice will be installed.
Caution : Be sure no power is applied to the chassis orcircuit, and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged replacement ES devices. (Normally harmless motion such as the brushing together of your clothes fabric or the liftingof your foot from a carpeted floor can generate static elec-tricity sufficient to damage an ES device.)
SPECIFICATIONS
GENERAL
Power requirements AC 120V , 60 HzPower consumption 21WDimensions (approx.) 16.9" X 3.1" X 10.8" (430 X 78.5 X 273 mm) (w x h x d)Mass (approx.) 8.82 lbs (4.0 kg)Operating temperature 41°F to 104°F (5 °C to 40°C)Operating humidity 5 % to 90 %Signal system NTSC
INPUT
ANTENNA IN 75 ohms (VHF/UHF/CATV)VHS VIDEO IN 1 Vp-p 75 ohms, sync negative, RCA jack x 2VHS AUDIO IN -6.0 dBm more than 47 kohms, RCA jack (L, R) x 2
OUTPUTS
VIDEO OUT 1 Vp-p 75 ohms, sync negativeS-VIDEO OUT (Y) 1.0 V (p-p), 75 ohms, negative sync, Mini DIN 4-pin x 1
(C) 0.286 V (p-p) 75 ohmsCOMPONENT VIDEO OUT (Y) 1.0 V (p-p), 75 ohms, negative sync, RCA jack x 1
(Pb)/(Pr) 0.7 V (p-p), 75 ohms, RCA jack x 2Audio output (digital audio) 0.5 V (p-p), 75 ohms, RCA jack x 1Audio output (analog audio) 2.0 Vrms (1 KHz, 0 dB), 600 ohms, RCA jack (L, R) x 1RF OUT Channel 3 or 4 (Swichable)
VCR SPECIFICATIONS
Head system Four head helical scan azimuth systemTimer 12-hour display type with AM, PMTape speed SP: 33.35 mm/sec, LP: 16.67 mm/sec, SLP: 11.12 mm/secTape width 12.7 mmMaximum recording time SP: 2 HOURS (T-120), SLP: 6 HOURS (T-120)/8 HOURS (T-160)Rewind time About 3 minutes (T-120)Channel coverage VHF: 2-13, UHF: 14-69,
CATV: 1-125 (4A, A-W, W+1 - W+84, A-5 - A-1)Frequency range 20Hz to 20kHzSignal-to-noise ratio More than 43dBDynamic range More than 88 dBChannel separation More than 60 dB
DVD SPECIFICATIONS
Laser system Semiconductor laser, wavelength 650 nmFrequency response DVD (PCM 96 kHz): 8 Hz to 44 kHz,
DVD (PCM 48 kHz): 8 Hz to 22 kHzCD: 8 Hz to 20 kHz
Signal-to-noise ratio More than 100dB (ANALOG OUT jacks only)Harmonic distortion Less than 0.008%Dynamic range More than 95 dB (CD), More than 100 dB (DVD)
ACCESSORY:
Video cable x 1, Audio cable(L/R) x 1, RF 75-ohm Coaxial Cable x 1, Remote control x 1, Batteries x 2
• Design and specifications are subject to change without notice.
1-5
2-1
SECTION 2
CABINET & MAIN CHASSIS
CONTENTS
1. EXPLODED VIEWS ................................................................................................................2-2
1. Cabinet and Main Frame Section ...........................................................................................2-2
2. Packing Accessory Section....................................................................................................2-3
2-2
EXPLODED VIEWS1. Cabinet and Main Frame Section
A43
A60
260A
44
A26
A00
250
300
462
467
467
457
467
A46
A47
468
468
468
323
265
467
465
330
452
452
261A
261A
261A
261A
285
274
283
284
286
280
A
5
4
3
2
1
B C D
2-3
2. Packing Accessory Section
BATTERY808
BAG804
PACKING, CASING803
806
INSTRUCTION ASSEMBLY
CABLE(COAXIAL)810 CABLE ASS'Y RF
801
REMOTE CONTROLLERASSEMBLY900
BOX802
PACKING, CASING803
811
812
PLUG ASS'Y 1WAY
PLUG ASS'Y 2WAY
3-1
SECTION 3ELECTRICAL
CONTENTSOVERALL WIRING DIAGRAM.....................3-2
VCR PART
ELECTRICAL ADJUSTMENTPROCEDURES..................................................3-3
ELECTRICALTROUBLESHOOTING GUIDE......................3-4
1. POWER(SMPS) CIRCUIT .............................3-4
2. SYSTEM/KEY CIRCUIT ................................3-7
3. SERVO CIRCUIT ...........................................3-8
4. OSD CIRCUIT..............................................3-10
5. Y/C CIRCUIT................................................3-11
6. Hi-Fi CIRCUIT..............................................3-15
7. Tuner/IF CIRCUIT........................................3-18
BLOCK DIAGRAMS ......................................3-20
1. Power (SMPS) BLOCK DIAGRAM.............3-20
2. TU/IF BLOCK DIAGRAM ............................3-22
3. Y/C BLOCK DIAGRAM ...............................3-24
4. NORMAL AUDIO BLOCK DIAGRAM.........3-26
5. Hi-Fi BLOCK DIAGRAM .............................3-28
6. SYSTEM BLOCK DIAGRAM ......................3-30
CIRCUIT DIAGRAMS ....................................3-32
1. Power (SMPS) CIRCUIT DIAGRAM...........3-32
2. TU/IF CIRCUIT DIAGRAM ..........................3-34
3. A/V CIRCUIT DIAGRAM .............................3-36
4. Hi-Fi CIRCUIT DIAGRAM ...........................3-38
5. JACK CIRCUIT DIAGRAM..........................3-40
6. SYSTEM CIRCUIT DIAGRAM.....................3-42
7. KEY CIRCUIT DIAGRAM............................3-44
• WAVEFORMS................................................3-46
• CIRCUIT VOLTAGE CHART.........................3-48
PRINTED CIRCUIT DIAGRAMS................3-50
1. MAIN P.C.BOARD .......................................3-50
2. MAIN P.C.BOARD .......................................3-52
3. POWER P.C.BOARD...................................3-54
DVD PART
ELECTRICAL TROUBLESHOOTINGGUIDE & WAVEFORMS ...............................3-56
1. System Clock X601 (27Mhz)......................3-56
2. Initializing between MPEG and SDRAM...3-56
3. Initializing between MPEG and Flash.......3-57
4. Reference Voltage 1 ...................................3-57
5. Reference Voltage 2 ...................................3-58
6. Checking the initial step of M/D Ass’y.....3-58
7. Checking the Video Signal ........................3-59
8. Checking the first step of servo (1)..........3-59
9. Checking the second step of servo (2)....3-60
10. Checking the output of Audio signal .....3-60
11. Checking the reset port ...........................3-61
12. Checking the focus & tracking servo ....3-61
13. Checking the track jump .........................3-62
14. The status of CD_LD and DVD_LD in
the PLAY MODE........................................3-62
15. The status Focus and spindle motor .....3-63
16. DATA STREAM..........................................3-63
17. Input Clock to IC202 ................................3-64
18. Tray Open and Close ...............................3-64
19. Focus Drive signal(FACT) .......................3-65
20. Signals for Front micom..........................3-65
21. FACT and FE for DVD9 (Dual disc).........3-66
22. System clock of MPEG IC .......................3-66
BLOCK DIAGRAMS ......................................3-67
1. DVD Overall Block Diagram ......................3-67
2. SERVO Block Diagram ..............................3-68
3. MPEG Block Diagram ................................3-69
4. AUDIO Block Diagram ...............................3-70
CIRCUIT DIAGRAMS ....................................3-71
1. RD SERVO CIRCUIT DIAGRAM ................3-71
2. SYSTEM CIRCUIT DIAGRAM.....................3-73
3. AUDIO CIRCUIT DIAGRAM........................3-75
• CIRCUIT VOLTAGE CHART.........................3-77
OVERALL WIRING DIAGRAM
3-2
PMC01CFG
12VA(CAP)5.2VA
CAP REV'H'I-limit
MOTOR GNDGND
12VA(DRUM)CAP CTL
LD INDFG/FG
DRUM CTL
123456789
101112
123456789
101112
P3D01SP PB ASP RECSP PB BEP PB BEP RECEP PBA
Hi-Fi PB AHi-Fi RECHi-Fi PB B
123456789
123456789
PPM01 PMP0124VAGND14VAGND5.3VA33VAGND4VA
12345678
12345678
PM
D01
PM
D02
V
cc(H
F)
RF
DV
D_L
DD
VD
_PD
VO
L(D
VD
)G
ND
VC
_IN
PU
TV
cc(H
F)
F E A D C BF
(+)
T(-
)T
(+)
F(-
)V
ccG
ND
CD
_LD
CD
_PD
VO
L(C
D)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
PM
D03
S
PM
+S
PM
-F
M +
FM
-LM
-LM
+S
W(O
PE
N)
SW
(CLO
SE
)G
ND
SW
(LE
AD
IN)
GN
D
1 2 3 4 5 6 7 8 9 10 11
1 2 3 4 5 6 7 8 9 10 11
P3D02CTL(+)CTL(-)A/E(+)A/E(-)A.RECA.PB
123456
123456
GNDFULL ERASE
P3D0312
12
DE
CK
MD
ON
EB
OA
RD
SM
PS
BO
AR
D
ON
EB
OA
RD
3-3
ELECTRICAL ADJUSTMENT PROCEDURES1. Servo Adjustment
1) PG Adjustment• Test Equipment
• Adjustment And Specification
a) OSCILLOSCOPE b) NTSC MODEL : NTSC SP TEST TAPE
MODE
PLAY
• Adjustment Procedurea) Insert the SP Test Tape and play.
Note - Adjust the distance of X, pressing the Tracking(+) or Tracking(-) when the “ATR” is blink after theSP Test Tape is inserted.
b) Connect the CH1 of the oscilloscope to the H/SW(TP) and CH2 to the Video Out for the VCR.c) Trigger the mixed Combo Video Signal of CH2 to the CH1 H/SW(TP) and then check the distance (time
difference), which is from the selected A(B) Head point of the H/SW(TP) signal to the starting point ofthe vertical synchronized signal, to 6.5H ± 0.5H (412µs, 1H=63µs).
• PG Adjustment Methoda-1) Payback the SP standard tapeb-2) Press the “OK(ENTER)” key on the Remote controller and the “REC” key on the Front Panel the same
time, then it goes in to Tracking initial mode. c-3) Repeat the above step(No.b-2), then it finishes the PG adjusting automatically.d-4) Stop the playback, then it goes out to PG adjusting mode after mony the PG data.
• CONNECTION
• WAVEFORM
V.OutH/SW(TP)
R/C TRK JIG KEY 6.5 ± 0.5H
MEASUREMENT POINT ADJUSTMENT POINT SPECIFICATION
V.Out
H/SW(TP)
OSCILLOSCOPE
CH1 CH2
V.outH/SW
R/C KEY
(TP)
H/SW
CompositeVIDEO
6.5H(412µs)
VCR PART
3-4
ELECTRICAL TROUBLESHOOTING GUIDE
NO Check or Replacethe D102.
Replace the D111.
Replace the D110.
Replace the D113.
YES
YES
Is the D113 normal?
Power Line of MainPCB is short.
1. Power(SMPS) CIRCUIT
NO 5.3VA.
Replace the F101.(Use the same Fuse)
Is the F101 normal?
Is the R101normal?
Is the BD101normal?
NO
NO
NO
NO
NO
NO
NO
NO
NO
Replace theBD101.
Replace the R101.
Is the D102normal?
Replace the D118(MTK)/D112(ST).
Replace the IC103.
YES
YES
YES
YES
YES
YES
YES
Is Vcc(9V~18V) sup-plied to IC101 Pin2?
Are the D118 (MTK)/D112(ST) normal?
Are the about 2.5Vat the IC103 Pin1?
Is the D111 normal?
Is the D110 normal?
(1) No 5.3VA (SYS/Hi-Fi/TUNER)
NO 33V.
Is the Vcc(33V) sup-plied to Q161 Emitter?
Check or Replacethe D113.
Is the Q162 Base“H”?
Check the PWR CTL“H” signal from µ-com
Check or Replacethe Q161
YES
YES
YES
(5) No 33V
3-5
NO 5V.
Check or Replacethe D118.
Is the Vcc(5.3V) sup-plied to Q160 Emitter?
Check or Replacethe Q160
Is the Q162 Base“H”?
NO
NO Check the PWR CTL“H” signal from µ-com
YES
YES
YES
(2) No 5V
No 3.3V.
Check or Replacethe D111
Check the PWR CTL“H” signal from µ-com
Is there about 3.7Vat the IC152 pin1?
Is there about 3.3V~5V at the IC152 pin4?
Check the IC152and Replace
NO
NO
YES
YES
YES
(3) No 3.3V
No SW5V
Check or Replacethe D118.
Is the Vcc(5.3V) sup-plied to Q163 Emitter?
Is the Q164 Base“H”?
NO NO
Check the PWR CTL“H” signal from µ-com
NO NO
YES
YES
Check or Replacethe Q163
YES
(4) No SW5V
3-6
NO 13VA.
Check or Replacethe D110.
Is the Vcc(13V)supplied to C123?
Check or Replacethe cap/Drum
Is the D117/D115Normal?
NO
NO Replace theD117/D115.
YES
YES
YES
(6) No 13V(TO Cap, Drum Motor)
NO 8V.
Is there about 13Vat the IC151 pn1?
YES
Is there about 3.3V~5V at the IC151 pin4?
YES
Check the IC151and Replace
YES
(7) No 8V
Check or Replacethe D110.
NO
NO Check the PWR CTL“H” signal from µ-com
NO 33V.
Is the Vcc(12V) suppliedto Q165 Collector?
Check or Replacethe D110.
Is the Vcc(10V) sup-plied to Q165 Base
Check or Replacethe ZD171.
Check or Replacethe Q165
YES
YES
YES
(9) No 9V
No REG 12V
Check or Replacethe D110.
Is the Vcc(13V) suppliedto Q156 Collector?
Is the Vcc(13V) sup-plied to Q156 Base
NO NO
Check the PWR CTL“H” signal from µ-com
Check the 33VLine
NO NO
YES
YES
Check or Replacethe Q156
YES
(8) No REG 12V
3-7
2. SYSTEM/KEY CIRCUIT
(1) AUTO STOP
(2) The unstable loading of a Cassette tape
Auto Stop
Does the SW30 waveformappear at the IC501Pin18?
Do the T-UP Reel Pulsesappear at the IC501 Pin80?
Is 12V applied to thePMC01 Pin8?
Check the Drum Motorsignal.
Does 5V appear at theRS501?
Check the Q160 PowerCircuit.
Refer to “SMPS DRUM12 Volt Trouble Shooting”.
Is 5V applied to theR531 ?
Refer to SMPS 5.3VAtroubleshooting.
Check the IC501Pins22, 23, 24, 25.
Do T/UP Reel Pulsesappear at the pointbetween R556 and R536?
Replace the T/UP Reel Sensor (RS501).
Check the CST SW andthe peripheral circuitry.
Replace the IC501.
The unstable loading of aCassette tape
Does the “H” signal appearat the IC501 Pin60 duringinserting the CST ?
Does the “L” signal appearat the IC501 Pin19 duringinserting the CST?
Check the DeckMechanism.
Caution : Auto stop can occur because Grease or Oil is dried up
YES
YES
YES NO
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO NO
YES
YES YES
3-8
3. SERVO CIRCUIT
(1) Unstable Video in PB MODE
Unstable Video inPB Mode.
Does the Noise level of thescreen changeperiodically?
Do the CTL pulses appearat the IC501 Pin97?
Is adjusting the height ofthe CTL Head accurate?
Readjust the height of theCTL Head.
Replace the IC501.
Refer to “When the Y signaldoesn’t appear on thescreen in PB Mode”.
Does the CFG waveformappear at the IC501Pin87?
On tracking do the CTLpulses move?
Does the Video Envelopewaveform appear at theIC501 Pin9?
Replace the IC501.
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
(2) When the Drum Motor(2) doesn’t run. Do the DFG Pulses appear
at the PMC01 Pin11?
Replace the DRUM-M orCAP-M.
Aren’t the foil patterns andthe Components betweenIC501 Pin 90 and PMC01Pin11 short?
Replace the IC501.
Refer to “(2)No 12VA of Power section”
Do the Drum PWM Pulsesappear at the IC501Pin76?
Aren’t the foil patterns andthe Components betweenIC501 Pin76 and PMC01Pin12 short?
Do the DFG Pulses appearat the IC501 Pin90?
Do the Drum PWM Pulsesappear at the IC501Pin76?
Aren’t the connecting patterns and the Componentsbetween IC501 Pin76 and PMC01 Pin12 short?
When the Drum Motordoesn’t run,
Does 12V appear at thePMC01 Pin8?
Does 2.8V appear at thePMC01 Pin12?
Check the connector(PMC01) and the Drum Motor Ass’y.
NOYES
YES
YES
NO
NO
NO
NO
NO
YES
YES
YES
3-9
Does the CFG signal appear at thePMC01 Pin1?
Does the PWM signal appear at theIC501 Pin77?
Does 2.8V appear at the PMC01 Pin 9?
Check the PMC01 and the CapstanMotor Ass’y.
Does the Capstan PWM signal appear atthe IC501 Pin77?
Aren’t the foil patterns and Componentsbetween IC501 Pin77 and PMC01Pin9 short?
Does the CFG signal come into theIC501 Pin87?
Aren’t the foil patterns and Componentsbetween IC501 Pin77 and PMC01Pin9 short?
2. SERVO CIRCUIT
(3) When the Capstan Motor doesn’t run,
NO
NO
NO
YES
YES
YES
When the Capstan Motor doesn’t run,
Does 12VA appear at the PMC01?
YES
Replace the IC501.
YES
NO
NO
YES
Refer to “SMPS(CAPSTAN/12Volt)Trouble Shooting”.
Aren’t the foil patterns and componentbetween IC501 Pin87 and PMC01Pin1 short?
Check the Capstan Motor Ass’y.
NO
3-10
4. OSD CIRCUIT
(1) No OSD display.
(2) I2C BUS CHECK
KEY doesn’t working.
Is 5V applied to the IC501Pin99?
Does LED or FLD changewhen a function button ispressed?
No OSD or F.OSD display.
Is 5.3V applied to theIC501 Pin53?
Does oscillation occur atthe IC501 Pins44, 45?
Replace the IC501.
The I2C waves don’tcome out.
Does Power appear at thePull up impedence(R569, R507)?
Replace the IC501.
Refer to “SMPS 5.3VATrouble Shooting”.
Replace the defective switches.
Refer to “SMPS 5.3VATrouble Shooting”.
Check or Replace the phe-ripheral Circurity.(L511,R518, C596, C595)
Refer to “SMPS 5.3VATrouble Shooting”.
YES
YES
YES
YES
NO
NO
NO
NO
NO
2. SERVO CIRCUIT
(4) KEY doesn’t working
3-11
5. Y/C CIRCUIT
(1) No Video in EE Mode,
No Video in EE Mode
Check the Tuner Pin16V
Check the SW 5V, 5.3VALine.(Power Circuit)
Is I2C BUS signal applied to the IC301 Pins73, 74?
Does the Video signalappear at the IC301Pin15?
Is 5.0V applied to theIC301Pins4, 22, 47, 60, 84?
Does the Video signalappear at the IC301Pin29?
Does the Video signalappear at the IC501Pin52?
Does the Video signalappear at the IC602Pin7?
Check the path of the sig-nal between the IC301 Pin29 and IC501 Pins50.
Is there Vcc 5V on theIC602 Pin6
Does the Video signal appear atthe IC602 Pin1(DVD MODE)
Replace the IC602.
Check the 5V. (Power Circuit)
Check the C327.(AGC)
Check the System Circuit.
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO NO
NO
3-12
3. Y/C CIRCUIT
(2) When the Y(Luminance) signal doesn’t appear on the screen in PB Mode,
Is 5.2VT, 5.3VA applied to theIC301 Pins22, 47, 60, 84?
Is the Y/C Bus siganlapplied to the IC301Pins73, 74?
Does the normal RF signalappear at the IC301 Pin6?
Check the SW 5V Line.(Power Circuit)
Check the System Circuit.(IC501 Pin18)
Check the V.H.S/W level.(Check R328)
Check the IC301
Refer to ‘SYSTEM I2C BUSCHECK Trouble Shooting’.
Is the V.H.S/W signalapplied to the IC301 Pin70?
Is V.H.S/W “H” about 3.4Vat the IC301 Pin 80?
Clean the Drum.
Check the path of theY(Luminance) RF signal.(C337, C340)
Does the Y(Luminance) signal appear at the IC301Pin9?
Is the Y(Luminance) Videowaveform showed up at theIC301 Pin43?
Replace the IC301.
NO
YES
YES
YES
YESYES
YES
YES
NO
NO
NO
NO
NO
NO
3-13
3. Y/C CIRCUIT
(3) When the C(Color) signal doesn’t appear on the screen in PB Mode,
Is 5.2VT/5.3VA applied to theIC301 Pins 22, 47, 60, 84.
Is the Color signal appliedto the IC301 Pin 57?
Check the SW 5V, 5.3VLine. (Power Circuit)
Replace the X301.
Check the Color Pass.
Is normal the X301(3.58MHZ) of oscillationFrequency?
Replace the IC301.
Does the Color signalappear at the IC301 Pin55?
Replace the IC301.
NO
YES
YES
YES
NO NO
NO
3-14
3. Y/C CIRCUIT
(4) When the Video signal doesn’t appear on the screen in REC Mode,
Is the EE signal normal?
Is 5.2V/5.3VA applied to theIC301 Pins 4, 22, 47, 60, 84?
Does the REC RF signalappear at the IC301Pin76?
Check EE Mode.
Check the system ofREC”H”(IC501 pin74)
Replace the IC301.
Check the SW 5V/ 5.3VALine.(Power Circuit)
Check PB Mode.
Does the REC “H”(4V~5V)signal appear at the Q303,Q307 Base?
Check the REC LuminancePass and Color Pass.
Does PB Mdoe operatenormally?
YES
YES
YES
Does the REC RF signalappear at the IC301Pins86, 90?
Check the Drum &Drum Connector.
YES YES
YES
NO
NO
NO
NO
NO
NO
3-15
6. Hi-Fi CIRCUIT
(1) No Sound(EE Mode)
YES
No Sound.
Check the SIF.IN of IC801 Pins57.
Check the DVD Audio of IC801Pins12, 74.
Check the AV1 Audio of IC801Pins11, 73.
Check the AV2 Audio of IC801Pins9, 71.
Check the Vcc of IC801 Pins3, 5, 15,32, 36, 46, 54.
YES
Check the IIC Clock and DATA atIC801 Pins37, 38.
YES
Check the Audio of IC801 Pins78, 80.
YES
Check the Audio of C804, C854.
YES
Check the JK601.
Check the TU701 SIF Pin13.NO
Check the DVD MODULE.(PMD02 Pins13, 15).
NO
Check the Rear Jack.(JK601 Audio in).
NO
Check the front Jack.Timer (JK602, JK603).
NO
Check the Power 5.2V, 5.3VA, REG 9V.Q701, PMP01 Pins1, 2, 5, 6.
YES
NO
Check the IC501 Pins71, 72.NO
Replace IC801.
Replace C804, C854.
NO
NO
3-16
3. Y/C CIRCUIT
(2) Hi-Fi Playback
YES
YES
YES
YES
PB mode
No Sound.
Check the Vcc of IC801(Pins3, 5, 15, 32, 36, 46, 54).
Check the Hi-Fi Selection switch.(IC801 Pin39) and the Tape quality.
Is the RF Envelope atIC801 Pin23 over 3Vp-p?
YES
Check IC801 Pin37(Data),Pin38(Clock)
YES
Do Audio Signals appear atIC801 Pin80(L-CH), 78(R-CH)?
YES
Do Audio Signals appear atJK601?
Check Power.NO
Check IC501 Pin19(A.H/SW)
NO
NO
Check the parts of µ-COM(IC501 Pins71, 72)
NO
Check the Connection atP3D01 Pins7, 9.
NO
Check the Jack(JK801)NO Check C801, C851, R801,
R851.YES
3-17
(3) Hi-Fi REC
Hi-Fi REC.
It is impossible to record Hi-Fi Audiosignal.
Check Vcc of IC801.(Pins3, 5, 15, 32, 36, 46, 54)
YES
YES
Check IC801 Pin37(Data), Pin38(CLOCK).
YES
Do Audio signals appear at IC801 Pin6?
YES
Do Audio signals appear at IC301Pin76(Normal Audio)?
YES
Do OSC signals appear at P3D02 pins4,5(50Vp-p)
YES
YES
Check Power.NO
Check ports of µ-CPM.(IC501 Pins71, 72)
Check Audio input signal of IC801Pin57(TU.A.), 7, 69(DVD.A.),11, 73(AVI.A.), 9, 71(AV2.A.)
NO
Check C825, C306, R311, R312, R346.
Check REC OSC BLOCK(FL301, Q301~Q305, Q308, Q309)
Is “High” IC501 Pin74 in REC mode.
NO
NO
NO
3-18
7. Tuner/IF CIRCUIT
(1) No Picture on the TV screen
No picture on the TVscreen
Does the Video signal atthe TU701 Pin16.
YES
YES YES
Is +33V applied to TU701Pin14?
YES
Is +5V applied to TU701Pin3?
NO
Does the Video signal atthe IC501 Pin 52.
NO
Does the Video signal atthe IC609 Pin 23.
YES
NO
Check the signal flow from IC609Pin23 to JK901 Pin Video out.
YES
Check 33V line.NO
Check 5V line.NO
YES
Does the Clock signalappear at TU701 Pin9?
Check the lIC Clock Signalof µ-COM Pin71.
NO
YES
Does the data signalappear at TU701 Pin10?
Replace Tuner.
Check the signal from IC301Pin29 to IC501 Pin50.
Check the signal from IC501Pin52 to IC609 Pin4.
Check the lIC Data Signalof µ-COM Pin72.
NO
3-19
(2) No Sound
No Sound.
Check the Vcc of TU701 Pins3, 14.
YES
Check 5.2V, 33V Line.NO
Check the Tuner SiF signal at IC801Pin57.
YES
Check the Audio of IC801 Pins78, 80.
YES
Check the Signal flow from IC801 Pins78,80 to JK901 Audio out(L), (R)
YES
Check the Tuner SIF of TU701 Pin13.NO
1. Check the Vcc(5.3VA, 9V) of IC801Pins3, 5, 36, 54.
2. Check the IIC Clock and Data at IC801Pins37, 38.
NO
3-20 3-21
BLOCK DIAGRAMS1. POWER(SMPS) BLOCK DIAGRAM
BD101
T101TRANSR101
+
BR BL(BK)(WH)
C103
!
!
!
!
!!
FUSE(F101)
NOISE FILTERBLOCK
(C101,L102,C102)
PHOTO COUPLER(IC102)
ERRORAMP
(IC103)
SNUBBERBLOCK
(D101,C105C106,R104)
DRIVE & S/W BLOCK(IC101, D102, R105, C104, C109 , C135)
Y-CAPC111
Y-CAPC110
FEED-BACKBLOCK
R112,R113,C133,R114.R115,R116
R117)
RECTIFIER &SMOOTING BLOCK(D110,C123,C163,R133,L122,C126)
RECTIFIER &SMOOTING BLOCK(D118,D112,C129,C131,L124,L125)
RECTIFIER &SMOOTING BLOCK(D111,C127,L123,
C128)
RECTIFIER &SMOOTING BLOCK(D113,C132,R119)
CAP VCC
D115
D117DRUM VCC
12V
8V
5.3VA
5V
3.3V
33V
12V REG BLOCK(Q156,ZD103,C151,R150,R153,C152)
8V REG BLOCK(D114,IC151,R170,
C154,C159)
5V S/W BLOCK(Q160,C155,D121,
R157,R158,R159,R160)
3.3V REG BLOCK(IC152,C153,R156)
33V S/W BLOCK(Q161,R154,R155,
R177)
5V S/W BLOCK(Q163,C162,R173,
Q164)
PWR CTL'H'
SW5V
9V
9V REG BLOCK(Q165,ZD171,C171,R174,R175,R176)
PWR CTL BLOCK(Q162,C161,R164,
R163)
6
5
7 8
2
31
DVW-7000
3-22 3-23
2. TU/IF BLOCK DIAGRAM
A.IN
CH
S/W
RE
G 5V
CO
NT
RO
L
V.IN
RF
AG
C
NC
EN
AB
LE
CLO
CK
DA
TA
AF
T
A.O
UT
SIF
TU
30V
NC
V.OU
T
999
GN
D
100AFT
732TU.V.OUT
875 MOD A.IN
61 MOD CTL
107 5V
26 VCR 'H'
971 MOD VEDIO
71 IIC CLK
72 IIC DATA
781 SIF OUT
12345678910111213141516
DVW-7000
15833V
3-24 3-25
3. Y/C BLOCK DIAGRAM
+
+
28 51 49 53
98
7365
74
808586878991 90 83
IC301
HA
118725
7677
10
6769
2930
3640
3837
3334
3132
5745
4342
46
55
EP
CH
1
EP
CH
2
V. O
UT
(TO
u-CO
M)
D-V
SY
NC
(FR
OM
u-CO
M)
System
System
Y-C
CD
C-C
CD
CLO
CK D
rive
LPF
RE
C-A
MP
SP
CH
2
RE
C-A
MP
SP
CH
1
RE
C-A
MP
EP
CH
2
RE
C-A
MP
EP
CH
1
DATA(FROM u-COM)
System
CLOCK(FROM u-COM)
System
V.H
/SW
30(F
RO
M u-C
OM
)
V.E
NV
(TO
u-CO
M)
System
SP
CH
1
SP
CH
2
Serial C
ontinterface
X-tal
VC
O/O
SC
TR
AP
629K
FM
AG
CP
.EQ
G.E
QD
LIMY
LPF
Main
De-E
mpf
DE
MO
S LP
F
2M LP
FA
CC
CT
L Trap
fh Trap
HIF
I Trap
C LP
FD
EA
LY
MIX
AM
P
6dBA
MP
C-
SQ
UE
LCH
SQ
UE
L CH
CLE
AR
SY
NC
CLA
MP
CLA
MP
Sharpness
CO
NT
RO
LY
NR
NC
SY
NC
SE
PC
-SY
NC
(TO
u-CO
M)
System
NL
De-eM
PH
VC
A
C.K
LPF
BD
BP
F
CC
D LP
FA
PC
/AC
CD
ET
L- DE
T
Main
Conv2
Main
Conv1
FB
CV
ideo ALC
(PB Mode)
++
++
++
28 29 51 49 53 55
46
1915
1718
3640
3837
2326
3114
98
11
LINE 2VIDEO IN
LINE 1VIDEO IN
TVVIDEO IN
5745
7365
7469
67
80
858687
+
12DVDVIDEO IN
89
91 90
AT
T-10dB
VID
EO
AG
C
CLE
AR
SY
NC
V. O
UT
(TO
u-CO
M)
D-V
SY
NC
(TO
u-CO
M)
System
System
System
Y-C
CD
C-C
CD
CLO
CK D
rive
6dBA
MP
FB
CV
ideo ALC
SQ
UE
L CH
AT
T-10dB
C-SYNC(TO u-COM)
AT
T-10dB
LPF
AG
C D
ET
CLA
MP
YN
R
CLA
MP
SY
NC
SE
P
D.E
.
C-LP
F 2
SP
FA
CC
HP
F
C-LP
F 1
NL E
mph
RE
C F
ILTE
R
LPF
VC
A629KT
RA
PF
BC
ALC
Main
Conv2
Main
Conv2
AP
C/A
CC
DE
T
Main
Em
phF
MM
OD
RE
CT
rap
RE
C-A
MP
SP
CH
2
RE
C-A
MP
SP
CH
1
RE
C-A
MP
EP
CH
2
RE
C-A
MP
EP
CH
1
MIX
AT
TB
.EC
.K
CC
DLP
F
L-DE
TJC
A(-4dB
)
f0=1.68M
f/0DE
VA
djst
X-tal
VC
O/O
SC
Serial C
ontinterface DATA
(FROM u-COM)System
CLOCK(FROM u-COM)
System
V.H
/SW
30(F
RO
M u-C
OM
)S
ystem
SP
CH
1
SP
CH
2
EP
CH
1
EP
CH
2
IC301
HA
118725
32 30
DVW-7000
(REC Mode)
3-26 3-27
4. NORMAL AUDIO BLOCK DIAGRAMIC
301
HA
1187
25N
F
SIF
A_I
N
RF
_MO
D
IC80
1L
A72
670B
MT
UN
ER
TU
701
1076D
ET
NO
RM
AL
AU
DIO
OU
T
LIN
E A
UD
IO(R
) IN
LIN
E A
UD
IO(L
) IN
RE
AR
JA
CK
RE
AR
Jac
k
A. O
UT
(L)
ALC
SIF
DE
MO
D
INP
UT
SE
LEC
T
OU
TP
UT
SE
LEC
T
46
13 1
57 92 71 11 73 12 74
8078
A. O
UT
(R
)
DV
D A
UD
IO
(Sys
tem
)
IC80
1L
A72
670B
MIC
301
HA
1187
25N
F AM
PE
QA
MP
784
10A
. OU
T (
R)
MO
D. O
UT
DA
TA
CLO
CK
R/P
HE
AD N.A
.IN
53
EN
A
5554
5 46
Fro
m u
-CO
M
80A
. OU
T (
L)
2
OU
TP
UT
SE
LEC
TO
R
EQ
3 2
SIF
DE
MO
D
INP
UT
SE
LEC
T
OU
TP
UT
SE
LEC
T
IC30
1L
A71
206M
SIF
IC80
1L
A72
670B
MT
UN
ER
TU
701
1076D
ET
NO
RM
AL
AU
DIO
OU
T
LIN
E A
UD
IO(R
) IN
LIN
E A
UD
IO(L
) IN
RE
AR
Jac
k
A. O
UT
(L)
RE
CA
MP
46
1357
RF
MO
D.
A_I
N1
2 9 71
8078
A. O
UT
(R
)
DVW-7000
ALC
9
(EE Mode) (PB Mode) (REC Mode)
3-28 3-29
5. Hi-Fi BLOCK DIAGRAM
A
BHi-Fi/REC
IC801LA72670BM
A.OUTTo JACK
MODULATORA.OUT(To Tu)
24
Hi-F
i PB
'B'
Hi-F
i PB
'A'
Hi-F
i RE
C
57
12
74
11
73
9
71
6 4
26 27
80A.OUT 'L'
A.OUT 'R'78
3
AUDIO INPUTBLOCK
NORMAL AUDIOOUT(To AVCP)
NORMAL AUDIOIN(From AVCP)
SIF
DVD A.IN 'L'DVD AUDIO
DVD A.IN 'R'
AV1 A.IN 'L'
AV1 A.IN 'R'
AV2 A.IN 'L'
AV2 A.IN 'R'
DVW-7000
REAR JACK
FRONT
FM MODU DE MODU
DEMODULATE
INPUTSELECT
OUTPUTSELECT
3-30 3-31
6. SYSTEM BLOCK DIAGRAM
GNDMODE S1MODE S2MODE S3MODE S4
MODE S/W
TO/FROM AVCP
T-UP REEL
T-UP END
SUP REEL
CST.SW/REC TAP
5V
CS5015.3VA
5.3VA
ES501R550
LD501DECK IR LED
R553
R555
RS501
RS502
R556
R558 C582
R538
R535
R537
R536
C534
R544
C552
R5C6C500 C517 R541
R529 R583
L512
MS501
X50214MHz
32.768KHz
OSC
OSCX501
1
2RESET
GNDVcc 3
5.3VA
5V
IC504
+
+ +
C592
+C503
L501
R557
SUP END
ES502
C535R564
R531 OSC
R/C
RC601
L511R598C595 C596
+C561
TO/FROM DECK
Q503
Q501
CV IN
25
24
23
22
21
79
58
80
88 49 40 3798
34
IC501M37760
MODE S1I-Limit
MODE S2
MODE S3
MODE S4
T-UP Sensor
T-UP Reel
SUP Reel
CST IN Vss
(AM
P)
Vss
(OS
D)
Vss
(SY
SC
ON
)
Vcc
(S
YS
CO
N)
Vcc
(S
ER
VO
)
CA
P. P
WM
CT
L +
CT
L -
CF
G
CA
P. R
EV
'H'
LD C
TL
V. E
NV
V.H
.SW
30
DP
G
D.V
.Syn
c
38
39 X out
Xc in
Xc out
X in
35
36
44
OS
C in
2
95 94 87 12 60 9 1876 90 13
H.A
.SW
SQ
PB
16 59 567711
DR
UM
PW
M
53
Vcc
(OS
D)
20 SUP Sensor
45
OS
C o
ut 2
14 99
Vcc
(A/D
)
TO/FROM AUDIO(Hi-Fi)
TO/FROM DVD
TO/ FROM TU/IF
72
100
26
61VCR 'H'
MODU CTL
PLL DATA PLL CLK
CV OUTAFT
71
52
POWER FAIL 78
A. MUTE 'H'
A. ENVA. H.SW
REC 'H' 74
68
71
72 CLK
DATA
74
50COMP IN
17
REC 'H'
15C.ROT
84A.MUTE'H'
S clkS in
S out
DVD DATA OUTDVD DATA IN
DVD CLKDVD RESET
DVD ENA
8
19
67
66
65
65
66
67
82
85
Hi-Fi ONLY
2GND
Vcc 3
IC505
1
IC5F1OSC
DISPLAY
DVW-7000
3-32 3-33
NOTES) Symbol denotes AC ground.
NOTES) Symbol denotes DC chassis ground.
NOTE) WarningNOTE) Parts that are shaded are criticalNOTE) With respect to risk of fire orNOTE) electricial shock.
SR14370ADVW-7000
(DVW-7000 Without)
(DVW-7000 Without)
CIRCUIT DIAGRAMS1. POWER(SMPS) CIRCUIT DIAGRAM 1
Switching Error.IC101 is defective.
Switching Error.IC103, 102 are defective.
2.5V, 3.3V no power.D111 is defective.
No Power.F101 is defective.
5.3VA no power.D112 is defective.
33V no power.D113 is defective.
No power.BD101, R101 are defective.
12VA no power.D110 is defective.
IMPORTANT SAFETY NOTICE
WHEN SERVICING THIS CHASSIS, UNDER NO CIR-CUMSTANCES SHOULD THE ORIGINAL DESIGN BEMODIFIED OR ALTERED WITHOUT PERMISSIONFROM THE GO VIDEO ELECTRONICS CORPORA-TION. ALL COMPONENTS SHOULD BE REPLACEDONLY WITH TYPES IDENTICAL TO THOSE IN THEORIGINAL CIRCUIT. SPECIAL COMPONENTS ARE
SHADED ON THE SCHEMATIC FOR EASY IDENTIFI-CATION.THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIF-
FER FROM THE ACTUAL CIRCUIT USED. THIS WAY,IMPLEMENTATION OF THE LATEST SAFETY ANDPERFORMANCE IMPROVEMENT CHANGES INTOTHE SET IS NOT DELAYED UNTIL THE NEW SERVICELITERATURE IS PRINTED.
NOTE : 1. Shaded( ) parts are critical for safety. Replace only
with specified part number.2. Voltages are DC-measured with a digital voltmeter
during Play mode.
3-34 3-35
2. POWER(SMPS) CIRCUIT DIAGRAM 2
SR14301ADVW-7000
(DVW-7000 Without)
3-36 3-37
3. TU/IF CIRCUIT DIAGRAM
SR14305ADVW-7000
PB
REC
3-38 3-39
4. A/V CIRCUIT DIAGRAM
1
2 4 7
3
6
3
3
9
12
13
8
59
1011
WAVEFORM
Y. (REC)C. (REC)Y(PB)
Y/PBC/PBY+C (PB)
C(PB)
Y+C (REC)
SR14303ADVW-7000
R333, C350, C349 are defective.No Color.
H/SW Level is defective..Video Noise.
L307,C349 are defective.No Color.
C323 is defective.Video output level unstable
R322, R323, R324, C320 are defective.VIDEO Distortion
3-40 3-41
5. Hi-Fi CIRCUIT DIAGRAM
SR14304ADVW-7000PB
REC
(DVW-7000 Without)
23 Pin is defective.Hi-Fi Audio is not appear.
IC801 Pins37, 38 aredefective.All Audio is not appear.
3-42 3-43
6. JACK CIRCUIT DIAGRAM
(DVW-7000 Without)
(DVW-7000 Without)
SR14306ADVW-7000
3-44 3-45
7. SYSTEM CIRCUIT DIAGRAM
1
3
48 5 67
2
WAVEFORM SR14302ADVW-7000
Q501, Q503 are defective.µ-COM is unstable.
IC505 is defective.VCR will not operate.
X501 is defective.
CLOCK SETTING will not operate.
X502 is defective.µ-COM will not operate.
ES501, ES502, LD501 aredefective.
Auto Rew will not working.RS501,RS502 aredefective.
Auto stop occures.
R575, R576, R577,R578 are defective.
Deck will not operate.
3-46 3-47
* IC501 WaveformTek Stop : 10.0KS/s 280 Acqs
M5.00ms Ch1Ch1 3.04 V1.00 V
T
T
1
Tek Stop : 250KS/s 299 Acqs
M 200µs Ch1Ch1 3.04 V1.00 V
T
T
1
Tek Stop : 10.0KS/s 18 Acqs
M 5.00ms Ch1Ch1 3.04 V
Trigger Position: 12%
1.00 V
T
1
T
Tek Stop : 10.0KS/s 27 Acqs
M5.00ms Ch1Ch1 3.04 V1.00 V
T
T
1
Tek Stop : 10.0KS/s 35 Acqs
M5.00ms Ch1Ch1 3.04 V1.00 V
T
T
1
Tek Stop : 50.0KS/s 120 Acqs
M1.00ms Ch1Ch1 3.04 V1.00 V
T
T
1
T
Tek Stop : 5.00KS/s 2 Acqs
M 10.00ms Ch1Ch1 340V
Trigger Level: 340mv
500mV
T
1
IC501 Pin 18REC/PB
IC501 Pin 13QUE/REV
IC501 Pin 13QUE/REV
IC501 Pin 95REC
IC501 Pin 87REC/PB
IC501 Pin 90REC/PB(DPG/DFG)
(DPG)
(DFG)
IC501 Pin 97PB(CTL OUT)
IC501 Pin 94REC
• WAVEFORMS* IC301 Waveform
IC301 Pin 9100mV/10msec DIVVV/EE(Main De-Emphasis out)
IC301 Pin 12100mV/10msec DIVPB(Main De-EmphaisPeacking)
IC301 Pins 33, 36, 37100mV/10msec DIVVV/EEClamp Drive IN Pin 33Y-out(to 1H CCD) Pin 36Y-out(from 1H CCD) Pin 37
IC301 Pin 15200mV/10msec DIVEE(VIDEO IN)
IC301 53 Pin100mV/0.2msec DIVREC/PB(2fsc)
IC301 31 Pin1.0V/20msec DIVVV/EE(C-SYNC OUT)
IC301 29 Pin500mV/10msecDIVVV/EE(VIDEO OUT)
IC301 Pin 43200mV/20msec DIVPB(C.OUT)
IC301 Pins 46, 57200mV/20msec DIVVV/EEfrom 1H CCD Pin 46to 1H CCD Pin 57
IC301 Pin 67100mV/0.2msec DIVPB/REC(3.58MHz X-TAL IN)
IC301 Pin 77100mV/5msec DIVPB(PB RF out)
IC301 Pin 86500mV/2msec DIVSP REC(REC RF)
IC301 Pin 90500mV/2msec DIVEP REC(REC RF)
3-48 3-49
• CIRCUIT VOLTAGE CHART
EE PLAYMODE
PIN NO.
0.06
0.06
0.02
5.10
2.10
0.00
2.84
1.85
1.85
2.39
2.64
1.69
0.01
2.78
0.01
0.31
2.80
1.95
2.80
0.02
2.80
5.10
2.32
0.52
2.13
3.01
0.51
0.03
2.47
2.79
0.37
2.39
2.10
1.83
3.05
2.31
3.04
0.00
2.49
2.09
2.49
2.13
2.13
0.01
3.12
3.12
5.05
4.92
3.28
5.05
2.03
5.05
2.61
0.01
0.00
0.06
0.01
5.15
2.61
2.54
2.84
1.35
1.34
1.90
3.04
0.01
0.01
2.40
0.01
1.92
2.80
1.89
2.80
0.01
2.80
5.14
2.34
0.88
2.13
2.81
0.92
0.03
2.38
2.89
0.23
2.82
2.15
3.14
2.54
2.39
3.13
2.18
1.45
2.12
2.66
2.14
2.14
0.01
3.15
0.00
0.00
4.97
3.33
5.10
2.11
5.10
2.63
0.01
EE PLAYMODE
PIN NO.
1.99
0.01
2.18
2.30
4.95
4.95
0.03
1.19
2.35
2.61
2.26
2.61
1.39
1.28
1.98
2.30
1.60
2.50
5.25
5.25
5.25
2.17
2.17
2.84
0.03
0.01
0.01
0.01
2.50
5.05
2.29
2.29
2.47
0.01
5.02
0.03
0.03
5.06
2.05
2.55
2.53
2.53
0.02
2.27
0.01
2.57
0.97
5.17
5.17
0
0.5
0
0.4
0.19
2.02
0.01
2.18
1.91
4.99
5.00
0.03
1.19
2.35
2.61
2.26
2.61
1.39
1.28
1.98
2.30
1.60
2.50
5.25
5.25
5.25
5.25
2.17
2.17
0.03
0.01
0.01
0.01
2.50
5.05
2.29
2.29
2.29
0.01
2.28
2.28
2.28
5.11
2.54
2.54
2.52
2.50
0.01
2.55
0.01
2.54
0
5.17
5.16
0
0.54
0
0.42
4.06
I C 5 0 1
EE PLAYMODE
PIN NO.
0.29
0.68
0
0
0
4.78
0
0
0.68
2.56
2.57
0
0.11
5.17
]5.17
5.17
0
5.13
5.13
5.13
0
0
0
0
0
5.15
1.52
1.43
5.15
2.19
2.28
0
0.51
0.26
0.26
2.35
2.41
0
1.29
0
0
1.88
0.53
1.88
4.96
2.03
2.6
1.96
0
0
0
2.57
0
0
0
3.91
0.99
3.42
0
0
4.78
2.57
0
0.43
2.57
2.57
0
0.11
5.17
5.17
5.17
0
5.13
5.17
5.13
0
0
0
0
0
5.15
1.51
1.44
5.15
2.18
2.27
0
0.55
0.55
0
2.34
2.41
0
0
0
0
1.99
0.57
1.98
4.95
2.03
1.92
2.05
0
0
0
2.58
4.28
0
0
EE PLAYMODE
PIN NO.
0
0.97
2.38
5.07
4.7
5.02
4.75
5.17
5.17
0
0
0
0
0
0
0
0
0
4.94
5.03
0
2.69
0.58
0.17
0
0.54
0.1
2.53
2.54
0.21
2.5
2.5
2.52
2.52
5.08
5.17
2.64
5.19
0
5.14
5.19
0
4.7
0
2.56
9.21
2.48
5.19
1.91
0
0.29
0
0
0.86
0
5.07
4.45
4.97
4.61
5.17
5.17
0
0
0
1.79
2.72
4.76
0
0
0
4.94
4.98
0
2.67
0.68
2.36
0
0
1.36
2.54
2.53
0
2.49
2.49
2.52
2.52
5.08
5.17
1.95
5.19
0
5.14
5.19
0
4.7
0
2.54
9.18
2.48
5.19
2.07
0
1.31
0
I C 5 0 4
I C 5 0 5
I C 8 0 1
EE PLAYMODE
PIN NO.
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
0
0
2.5
1.91
2.49
5.06
2.51
0
0
2.51
2.52
2.52
2.51
0.19
2.25
0
2.24
2.25
0
2.48
0
2.51
5.02
2.64
2.64
0
5.06
5.17
5.17
0
0.19
2.52
2.51
2.52
2.52
0
5.06
2.49
1.9
0
0
2.05
1.22
3.86
9.2
6.26
1.96
2.2
4.56
2.52
3.86
3.15
4.02
3.83
2.45
0
0
2.5
2.44
2.49
5.05
2.51
0
0.86
2.44
2.45
2.43
2.42
3.66
2.3
0
2.3
2.3
0
0.11
1.34
3.79
5.01
2.65
2.64
0
5.05
5.05
5.17
2.57
0
2.45
2.43
2.45
2.45
0.25
5.05
2.49
2.42
0
0
2.06
0
0.25
9.19
0.28
0.29
2.15
0
2.35
0.23
0.24
0
0
0
EE PLAYMODE
PIN NO.
3.87
4.09
3.88
3.94
0
0
0
3.86
0
2.5
3.87
3.17
0
4.42
0
4.4
0.32
0.32
0.31
0.31
0
0
0
0.31
0
2.5
0.4
0.22
0
4.3
0
4.3
I C 3 0 11
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
1
2
3
1
2
3
1
2
3
4
5
6
7
8
9
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
EE PB EE PBBase Emitter Collector
PB EELocation
No.
Q301
Q302
Q303
Q304
Q305
Q306
Q307
Q309
Q501
Q503
Q504
Q505
Q506
Q507
Q805
Q701
Q702
0.25
4.4
0.01
4.7
-28
-28
4.7
0.68
5.17
2.82
1.58
5.07
2.8
2.56
9.02
4.98
0.01
5.1
0.01
pulse
0 0
pulse
2.2
0
0
4.48
2.27
2.24
0
3.23
2.08
9.81
5.7
0.25
5.1
0.02
-28
-0.015
0
4.6
0
5.15
4.95
4.96
0
0
5.06
12.58
5.19
0.2
0.3
5
5
0
0
pulse
0
pulse
5.15
4.95
4.96
3.29
0
5.05
12.99
5.19
0.2
5.2
0.025
4.4
0.7
0.7
0.025
1.5
0.68
5.17
2.94
1.58
0
2.6
2.56
9.24
4.97
-0.01
5.1
4.7
4.7
-24
-24
5.1
0
4.48
2.18
1.03
0
0
2.08
9.82
5.7
PRINTED CIRCUIT DIAGRAMS1. MAIN P.C.BOARD
LOCATION GUIDE
3-50 3-51
3-52 3-53
2. MAIN P.C.BOARD
LOCATION GUIDE
3-54 3-55
2. POWER P.C.BOARD
LOCATION GUIDE
NOTES) WarningNOTES) Parts that are shaded are criticalNOTES) With respect to risk of fire orNOTES) electricial shock.
3-56
DVD PARTELECTRICAL TROUBLESHOOTING GUIDE & WAVEFORMS1. System Clock X601 (27Mhz)
IC601
X601
MPEG(STI5589)
NORMAL
1) MPEG IC start oscilatingafter being installed VCC
ABNORMAL
1) Logo Picture doesn’t appear
2) Initial step fail* Initial step : power cord in -> green LED ->
red LED -> power key input -> Logo picture
6.5 Vp-p
X601 : 27 Mhz X601 : there is distortion
IC602SDRAM
VCRFrontµ-com
X601
MRESET
SMI_CLK
R693IC601MPEG(STI5589)
1) MPEG IC start oscilating(27Mhz)after beinginstalled VCC
2) MPEG IC and RF IC get the MRESET signalfrom VCR front µ-com and they are initialized.
3) And then, MPEG IC generate SMI_CLK andsend to SDRAM
4) MPEG IC and SDRAM are synchronized bySMI_CLK, they communicate between.
If oscilation(27Mhz) don’t appear, checkThe X-TAL and VCC and replace MPEG IC.
If SMI_CLK don’t appear, first cut the SMI_CLKline (remove R693) and recheck.Don’t appear -> check MPEG IC or replaceAppear -> check the SDRAM or replace
/M-RESET Reset Time
PowerCord in
X601(27 Mhz)
SMI_CLK(133 Mhz)
2. Initializing between MPEG and SDRAM
3-57
IC603
FlashROM
IC501Frontµ-com
IC601(27Mhz)
MRESET
WE
VCC
dataaddress
IC601
MPEG(STI5589)
1) MPEG IC start oscilating(27Mhz) after beinginstalled VCC
2) MPEG IC is initialized by MRESET
3) MPEG IC send the WE(read/write) signal beforecommunicating with FLASH ROM
WE signal should be confirmed by Flash or thenext step will not continue.
As that result, the initial step(power cord in ->green LED -> red LED -> standby) will fail.
If WE signal doesn’t appear, check the VCC andreplace the Flash ROM…
VCC
PowerCord in
MRESET
WE
3. Initializing between MPEG and Flash
VCC (3.3V)
V_REFD (2.1V)
9 PIN
10 PIN
IC202
DSP(STL6317)
1) There is one kinds of reference voltage on DSPIC
2) These are outputed from DSP IC and 2.1V isused as reference of Pick - up
If these reference voltage don’t appear, All kinds ofservo control will fail.
So, should be checked first of all Check the DSP
IC and replace…
3) The reference voltage of DSP is 1.65V for insideof IC L6317, but we can cheek the voltage onlyby TP.
VCC
3.3V
2.1V
PowerCord in
V_REFD
4. Reference Voltage 1
3-58
IC202(STL6316)
Pick-UpReference 2.1V
TacT Reference 2.8
F.ET.E
IC201(L6560)
We can see how the reference voltage,mentioned previous page, will work on servocontrol..
1) The DC level of RF signal from P/up is 2.1V
2) The DC level of T.E and F.E is 1.65V
3) Correct DC level of these signal make servowork normally.
Even though, the reference voltage come outcorrectly from DSP,
If A/B/C/D are not biased by 2.1V, and checkingthe P/up is needed.
If the DC level of T.E is not 1.65V, check DSPand replace it…In case of FE, procedure is same
FE
1.65VTE
A/B/C/D
1.65V
2.1V
5. Reference Voltage 2
LIMIT_SW
CD_LD
CLOSE_SW
FM+
M/DASSY
PMD02 PMD03
IC202
(STL6317)
IC201
(L6560)
Let’s look over the initial action of M/D...
1) When the tray is closed, CLOSE-SW shouldbe changed from 5V to 0V and DSP need todetect this change
2) Feeding Motor move the P/up to inner area untilthe LIMIT SW is detected
3) After DSP detect the LIMIT SW, CD laser isturned on and go to the next step
4) if there is a DISC on the tray, the RF will bedetected by the CD laser and go to next step..
Check the CLOSE-SW and LIMIT-SW
if anything of the both is not detected, the nextstep won’t go on. This means that even thoughthere is a DISC on the tray the DISC will notrotate.
FM+
CLOSE-SW
P/up moveto inner area
Limit swdetect
CD_LD on
Tray close
LIMIT-SW
CD_LD
6. Checking the initial step of M/D Ass’y
3-59
Check the followings
1) Check the video output mode. if the output mdoe is progressive - on, there is no composite signal.the output mode should be changed to progressive - off
2) Check the buffer IC and MPEG, and then replace.
Composite out
34 pin(IC601)
35 pin (IC601)
27 pin(IC601)
23Pin(IC609)
4Pin(IC609)
VCR Block
buffer
IC609
IC601STI5589(MPEG)
7. Checking the Video Signal
81 36
DSP-RST PC[o]
IC202
DSP IC
IC203MOTORAMP IC
IC601MPEG
Let’s look over the initial step of DSP
1) First. DSP IC receive the DSP - Reset fromMPEG
2) This reset signal get DSP initialized and DSP isready to do first step for servo
3) PC[o] from DSP is the test signal for checkingthe PLL- loop
4) after checking the PLL-loop, the second step isfollowed. the second step will be explained onnext page…..
if PC[o] doesn’t appear, check DSP andreplace.
/DSP-Reset
Vcc(3.3V) 50ms
DSP Reset periodPC[o]
8. Checking the first step of servo (1)
3-60
M/DASSY
PMD03
IC202(STL6317)
Let’s look over the initial step of servo
1) when the tray is closed, first of all, it should bechecked whether there is disc or not on tray
2) CD laser is turn on and the lense is moved. ifthere is a disc on tray, RF signal will appear
3) next, it should be confirmed which disc is that.CD or DVD.
4) the following step will be done continuously CD -Laser on -> move lense -> DVD - laser on ->move lense. in according to disc type, there willbe RF signal…
5) after confirming disc, CD or DVD laser turn onand focus servo is executed…
the below picture is related signals when DVDdisc is inserted
CD laser on
DVD laser on
PICD/DVD
CD_LD
DVD_LD
4)
9. Checking the second step of servo (2)
DAC_PCMOUT3
DAC_PCM_CLK
DAC_SCLK
DAC_LRCK
Analogaudio
IC601
MPEG(STI5589)
AUDIO2DAC
(PCM1742)
OP-AMPAnalogAudio
Amplified(MC4580)
IC401 is called as Audio DAC, DAC means Digital-Analog Convertor.
This IC receives digital signal from MPEG and con-vert digital signal to analog signal, so we can hearsound…
IC401 is connected with OP - AMP and an analogAudio signal is amplified at the OP - A MP.because the analog audio signal from DAC is avery low level.
DAC_PCM_CLK : this is the system clock forIC401
DAC_SCLK : this is standard clock to synchronizethe audio serial data
DAC_LRCK : R-chanel and L-chanel are selectedamong the audio serial data by this
DAC_PCMOUT3 : serial audio data
DAC_PCM_CLK
DAC_SCLK
DAC_LRCK
ADAC_DATA
10. Checking the output of Audio signal
3-61
Pin 81 of IC202, pin 130, 193 of IC601 and pin 12 of IC603 are related to RESET.
We can know whether IC is intialized or not through those ports.
The waveform shows the status when the reset signal works normally.
If the MRESET is abnormal, then check the front u-com(IC501) and replace it
MRESET (Pin130 of IC601)
DSP_RST (Pin 81 of IC202)
3.3V power input
The waveform when power on
11. Checking the reset port
Waveforms as below are regarding focusing and tracking servo normally.FE and TE signal are generated in IC202 and output at pin55, pin54 and pin20 of IC202, respectively.
FEIC202 Pin55
TEIC202 Pin54
12. Checking the focus & tracking servo
3-62
TE and TACT signals are output respectively from pin 54 and pin 34 of IC 202 during a normal play.
SLED signal is output pin 29 of IC 202 and flow into pin 15 and pin 18 of IC 201 to operate a sled motor
when to skip chapters or to scan.
IC202pin34
(TACT)
IC202pin54(TE)
IC202pin29
(SLED)
IC202pin34
(TACT)
IC202pin54(TE)
IC202pin29
(SLED)
The waveform during a normal play The waveform when to skip or scan
13. Checking the track jump
This is the waveform of FE and collectoroutputs of Q205 and Q206 when to play DVD
Section A : CD_LD is ON and DVD_LD is OFFSection B : DVD_LD is ON and CD_LD is OFF
This is the waveform of FE and collector outputsof Q205 and Q206 when to play CD
Section C : CD_LD is ON and DVD_LD is OFFSection D : CD_LD is OFF and DVD_LD is ONSection E : CD_LD is ON and DVD_LD is OFF
The waveforms as below indicate “COLLECTOR” outputs of Q205 and Q206,respectively when to play DVD and CD
IC202pin55(FE)
Q205COLLECTOR
Q206COLLECTOR
IC201pin15(SLED)
Q205COLLECTOR
Q206COLLECTOR
14. The status of CD_LD and DVD_LD in the PLAY MODE
3-63
The waveform is to display F+ siganal from pin 9 IC201 and SPM+ from pin 10 IC201.
F+ is used to control a focus actuator of pick - up and SPM+ is used to operate a spindle motor.So, we can know the position of the acuator and the speed and rotating direction of the spindlemotor through those signals.
IC201pin 9(F+)
IC202pin 28(SPINDLE)
The waveform F+ and SPM+ in the PLAY Mode
15. The status Focus and spindle motor
This waveforms are showing “The Downloading serve program”.
The must important thein of the download process is the timing.
The servo program must be downloaded before the second DSP reset.
DSP_Reset(IC601 pin193 to IC201 pin81)
/MRESET(IC601 pin130)
IIC_DATA(IC601 pin201 to IC202 pin69)
DSP_Reset active Low
IIC_CK(IC601 pin202 to IC202 pin68)
16. DATA STREAM
3-64
C24412p
C24512p
R237 1M
X201
R2C9220
86 87
IC202(STL6317)
The waveform and the block diagram as below show a clock input and output between IC202 and X201.
Clocks generated in X201 is output and input into pin86 and pin87 of IC202.
The clock frequency is 20MHz.
IC 202pin86
IC 202pin87
A diagram for a colck input of IC201 The waveform of clock inputs to IC201
17. Input Clock to IC202
IC202DSP(STL6317)
IC201Driver IC(L6560)
Pin 38
Pin 39
Pin 1
Pin 2
Tray-open(LOPEN)
(LCLOSE)
Tray-closeMD
Pin 4
Pin 5
LM-
LM+
DSP send tray - open or tray - close signal to IC201(motor drive IC)
IC201 generates LM+ and LM - and transmits them to operate a loading motor.
if there is no LM+ or LM-, check the Tray-open and Tray-close. And replace the Motor Drive IC .
IC201pin1
IC201pin2
A signal flow for tray open and close The waveform input to IC201 for tray open and close
18. Tray Open and Close
3-65
IC202(DSP)
IC201(Driver IC)
Pin23
Pin24
Pin33 Pick-up
F-
F+
Pin8
Pin9
FACT
FACT is made from focus error signal at DSP(IC202) and is input to IC201.
And then FACT is converted into F - and F+ in IC201.
Finally, they are sent to pick - up to control a focus actuator.
IC202pin33(FACT)
IC201pin8(F-)
IC201pin9(F+)
A signal flow for FACT The waveform of FACT, F- and F+
19. Focus Drive signal(FACT)
MRESET signal is output from VCR µ-COM when power is on, so IC501 is initialized.
And those(VCR µ-COM and IC501) communicate each other through DVD-DATA, DVD-CLK signals
Waveforms display each signal when power on and after power on
IC501 pin214(FLD_CLK)
IC501 pin2(FLD_D_
OUT)
IC501 pin215(FLD_D_IN)
IC501 pin130(MRESET)
IC501pin214
IC501pin2
IC501pin215
IC501pin130
The waveform when power is on The waveform after power on
20. Signals for Front micom
3-66
FE signal becomes like the waveform 2, in case of DVD dual layer disc since the laser
beam is reflected on both layer 0 and layer 1.
Layer0 Layer1
A
21. FACT and FE for DVD9 (Dual disc)
1 6
R691IC606Buffer IC IC601
C642C641
R600
X601
The waveform and the block diagram as below show a clock input and output between IC601 and X601.
Clocks generated in X601 is output and input into pin126 of IC601.
The clock frequency is 27MHz.
If this clock is abnormal or does not appear, replace the X-tal or MPEG IC
IC601pin126
A diagram for a colck input of IC601 MPEG CLOCK
22. System clock of MPEG IC
3-67
BLOCK DIAGRAMS1. DVD OVERALL BLOCK DIAGRAM
M
M
DIS
C
Spi
ndle
Mot
or
Load
ing
Mot
orO
PE
N S
/W
CLO
SE
S/W
LIM
IT S
/W
DE
CK
ME
CH
AN
ISM
Vid
eo O
ut2c
h A
ud
io O
ut
VF
+
AC
INP
OW
ER
BO
AR
D
VF
-
-27V
+8V
+5.3
VA
+5V
+3.3
V-M
1
IC40
1P
CM
1742
KE
AU
DIO
2c
h D
AC
IC40
2O
P A
MP
M64
580
R
VIDEO
YP
r
PO
WE
RC
ON
TR
OL
IC20
1L
6560
Mo
tor
Dri
ver
PIC
KU
PIC
202
ST
L63
17C
D /
DV
D D
SP
Pb
IC50
1V
CR
U-c
om
FL
DIS
PL
AY
KE
Y In
pu
t
+12_
A
DS
P/M
PE
G(1
.8 R
egul
ator
)
X50
132
.768
KH
zX
-TA
L
Mem
ory
Inte
rfac
eD
iagn
ostic
s C
ontr
olle
r
Fro
nte
nd
Inte
rfac
e
IC60
2S
DR
AM
64M
bit
16b
it x
4
Mic
roP
roce
sso
r
Vid
eo E
nco
der
& D
AC
Super Jack
IC60
9M
M16
23V
IDE
O F
ILT
ER
/ B
UF
FE
RIC60
38M
F
lash
Mem
ory
X20
120
MH
zX
-TA
L
AD
AC
-EN
A_2
CH
DA
C_P
CM
OU
T3
AD
AC
_DA
TA
AD
AC
_CLO
CK
DA
C_R
ST
DA
C_S
CLK
DA
C_L
RC
KD
AC
_PC
M_C
LK
RC
501
Rem
oco
n
Rec
eive
r
Rem
ote
Con
trol
ler
Pow
er-C
ontr
ol
+3.3
VM
PE
G(1
.8 R
egul
ator
)
RF
IC/P
ick-
up/M
otor
Driv
e/M
D/A
udio
AD
C/D
AC
Fro
nt U
-com
/Buf
fer
IC/R
eset
IC
Aud
io O
P A
MP
Mot
or D
rive
IC
VC
R U
-com
VC
R U
-com
IC60
474
HC
T24
4L
evel
Sh
ift
RF
Sig
nal A
/B/C
/D/E
/F
LM+,
LM
-
MF
eedi
ng
Mot
or
FM
+, F
M-
FA
CT
TA
CT
Act
uato
r m
ute
Spi
ndle
on
Vre
f
PC
(O)
Load
ing
Con
trol
DV
D_L
D,
CD
_LD
F+
/F-/
T+
/T-
SP
M+
, SP
M-
PS
EL0
, PS
EL1
IC20
3N
JM34
14F
G G
ener
atio
nB
lock
Au
dio
DS
P
IC60
1S
TI5
589
MP
EG
DE
CO
DE
R
X60
1 27
MH
zX
-TA
L
DS
P_R
ST
IRQ
2IIC
_DA
TA
IIC_C
LKR
S_E
CC
B_S
TA
RT
RS
_DA
TA
RS
_DV
ALI
DR
S_B
CLK
RS
_ER
RO
R_E
NR
S_E
RR
OR
CV
BS
C (
for
S-V
ideo
)Y
(fo
r S
-Vid
eo)
Y/G
(C
ompo
nent
Vid
eo)
Pb(
B)
(Com
pone
nt V
ideo
)P
r(R
) (C
ompo
nent
Vid
eo)
SM
I_C
S[0
:1]
SM
I_R
AS
SM
I_C
AS
SM
I_W
ES
MI_
DQ
ML
SM
I_D
QM
US
MI_
CLK
INS
MI_
CLK
OU
TS
MI_
DA
TA
[0:1
5]S
MI_
AD
R[0
:13]
Top
BO
OT
CP
U_A
DR
[1:2
1]C
PU
_DA
TA
[0:1
5]F
LAS
H_C
EF
LAS
H_O
EW
E
L
Dig
ital A
ud
io O
ut
Coxial
Optical
SP
DIF
DV
D_C
LK/F
LD_C
SD
VD
_DA
TA
/MR
ES
ET
VC
R_D
AT
A
MP
EG
Dec
od
erS
ub
-pic
ture
OS
DA
ud
io D
eco
der
X50
214
.318
18M
Hz
X-T
AL
To
VC
R
BLO
CK
VIDEO SIGNAL
DVW-7000
3-68
DIS
C
PIC
K U
PC
D :
A/B
/C/D
/E/F
DV
D:A
/B/C
/D
LM+,
LM
-
FM
+, F
M-
DV
D_L
D,_
CD
_LD
F+
/F-/
T+
/T-
Load
ing
Mot
orMM
Spi
ndle
Mot
or
Fee
ding
M
otor
M
SP
M+,
SP
M--
OP
EN
S/W
CLO
SE
S/W
LIM
IT S
/W
VR
-DV
DV
R-C
DP
SE
L0P
SE
L1V
_RE
FD
IC60
1S
TI5
589
MP
EG
DE
CO
DE
RD
SP
_RS
TIR
Q2
IIC_D
AT
AIIC
_CLK
RS
_EC
CB
_ST
AR
TR
S_D
AT
AR
S_D
VA
LID
RS
_BC
LKR
S_E
RR
OR
_EN
RS
_ER
RO
R
Fro
nten
dIn
terf
ace
(sec
tor
proc
esso
rC
PR
M,
DV
D d
ecry
ptio
n)
Mem
ory
Inte
rfac
eD
iagn
ostic
s C
ontr
olle
r
Mic
ro P
roce
ssor
ST
20
MP
EG
Dec
oder
Sub
-pic
ture
OS
DA
udio
Dec
oder
Vid
eo E
nco
der
& D
AC
Au
dio
DS
P
IC20
2S
TL
6317
CD
/ D
VD
DS
P
Inpu
t sta
ge
Lase
r C
ontr
ol
Cha
nnel
Pro
cess
ing
Mpe
g de
code
rIn
terf
ace
Mot
orA
ctua
tor
Con
trol
Ser
voP
roce
ssin
g
IC20
3N
JM34
14F
G G
ener
atio
nB
lock
FA
CT
TA
CT
Act
uato
r m
ute
Spi
ndle
on
SLE
DLO
PE
NLC
LOS
EP
DM
MP
D
PC
(O)
DVW-7000
IC20
1L6
560
Mo
tor
Dri
ver
2. SERVO BLOCK DIAGRAM
3-69
3. MPEG Block Diagram
VC
RJA
CK
BL
OC
KIN
TE
RF
AC
E
DS
P
I/F
IC60
1S
TI5
589
MP
EG
DE
CO
DE
R
IC60
2S
DR
AM
64M
bit
16b
it
IC60
38M
F
lash
Mem
ory
SM
I_C
S[0
:1]
SM
I_R
AS
SM
I_C
AS
SM
I_W
ES
MI_
DQ
ML
SM
I_D
QM
US
MI_
CLK
INS
MI_
CLK
OU
TS
MI_
DA
TA
[0:1
5]S
MI_
AD
R[0
:13]
CP
U_A
DR
[1:2
1]C
PU
_DA
TA
[0:1
5]F
LAS
H_C
EF
LAS
H_O
EW
E
AD
AC
-EN
A_2
CH
DA
C_P
CM
OU
T3
AD
AC
_DA
TA
AD
AC
_CLO
CK
DA
C_R
ST
DA
C_S
CLK
DA
C_L
RC
KD
AC
_PC
M_C
LK
2DA
CIN
TE
RF
AC
E
SP
DIF
DS
P_R
ST
IRQ
2IIC
_DA
TA
IIC_C
LKR
S_E
CC
B_S
TA
RT
RS
_DA
TA
RS
_DV
ALI
DR
S_B
CLK
RS
_ER
RO
R_E
NR
S_E
RR
OR
PR
OG
RE
_L16
/9D
2-T
1D
2-T
2D
2-T
3
AM
UT
E
CV
BS
C (
for
S-V
ideo
)Y
(fo
r S
-Vid
eo)
Y/G
(C
ompo
nent
Vid
eo)
Pb(
B)
(Com
pone
nt V
ideo
)P
r(R
) (C
ompo
nent
Vid
eo)
Fro
nten
dIn
terf
ace
(sec
tor
proc
esso
rC
PR
M,
DV
D d
ecry
ptio
n)
Mem
ory
Inte
rfac
eD
iagn
ostic
s C
ontr
olle
r
Mic
ro P
roce
ssor
ST
20
MP
EG
Dec
oder
Sub
-pic
ture
OS
DA
udio
Dec
oder
Vid
eo E
nco
der
& D
AC
Au
dio
DS
P
DVW-7000
3-70
4. AUDIO Block Diagram
IC40
1P
CM
1742
KE
AU
DIO
2ch
DA
C
L R
L RM
PE
G
I/F
To
VC
RH
i-F
i/Jac
k B
lock
IC40
2M
C45
80O
P A
MP
LP
F &
Bu
ffer
DA
C_S
CLK
DA
C_L
RC
KD
AC
_PC
M_C
LK
AD
AC
_CLO
CK
AD
AC
_DA
TA
AD
AC
-EN
A_2
CH
DA
C_P
CM
OU
T3
DVW-7000
3-71 3-72
FOCUS SERVO LOOP
TRACKING SERVO LOOP
SPINDLE SERVO LOOP
SLED SERVO LOOP
SR14308ADVW-7000
DISC detect error
Test pin for check spindle speed
Reference voltage for pick up
Motor drive ICPlup, Spindle, Loading Motor not work Tray open/close
RF Amplified & Filtered
RF Amplified
DVD reading fail
CD reading fail
The final signal for RF
Servo DSP IC
F.E
Find best point for Tracking & focusing servo
DSP initializing signal-servo is not work
Interface line withMPEG IC
T.E
CIRCUIT DIAGRAMS1. RD SERVO CIRCUIT DIAGRAM
3-73 3-74
2. SYSTEM CIRCUIT DIAGRAM
SR14307ADVW-7000Compooonent Video Loop
Video Loop
Digital Audio Loop
Invertor IC
DSP Reset Main Servo data and clock1.8V Regulator
Video Buffer IC
SDRAM 64M Ligo picture will not display
MPEG IC1. Initial Function2. Video output3. Audio output
Level shuf ICInitial Function will be abnormal
Flash ROMServo program downlosd
µ-COM Programdownload connector
Main Reset fromVCR µ-com
X-TAL27MHz
EEPROMNot used
3-75 3-76
3. AUDIO CIRCUIT DIAGRAM
SR14309ADVW-7000
2CH L
2CH R
2Ch Audio digital to Analog convertor OP Amp for Amplifying Audio Siganl
Transistor for zero mute
Audio mute be send to VCR
Serial Interface with main µ-com (MPEG IC)
2Ch Audio DATA
3-77 3-78
STOP PLAYMODE
PIN NO.
0.02
0.02
8.04
0.02
0.02
2.85
2.85
2.85
2.85
2.84
2.84
1.67
1.67
8.03
2.71
0
0
2.74
0.59
2.94
2.8
0.59
2.95
2.81
0.59
7.51
4.94
0.6
4.93
2.76
0.23
2.81
2.96
0.02
3.3
0.01
0.02
0
8
0.03
0
2.7
2.93
2.7
2.93
2.72
2.92
1.64
8.04
8.04
2.95
0.01
0
0.02
0.02
8.01
1.25
0.03
3.65
3.6
3.64
3.61
4.92
2.32
3.59
3.71
8.01
2.72
0.01
0
2.75
2.75
3.44
2.76
2.74
2.76
2.75
2.75
7.53
4.94
2.75
4.95
2.75
2.75
2.76
2.77
3.25
3.29
0.02
0.02
0
8
0.03
0
2.7
2.93
2.7
2.93
2.72
2.92
1.64
8.04
8.04
2.95
0.01
0
STOP PLAYMODE
PIN NO.
2.79
0.46
2.77
2.94
0.46
0
0
0.46
0
0
0.46
0
2.7
0
0
0
0.02
3.2
0
2.4
2.72
2.7
0
0
1.04
0.12
7.8
1.59
0
1.58
0
3.12
4.03
2.5
2.45
0
2.4
2.94
2.94
2.121
3.18
3.18
1.58
5.54
5.54
5.5
0
5.5
5.54
5.54
12.1
2.79
0.46
2.77
2.94
0.46
0
0
0.46
0
0
0.46
0
2.7
0
0
0
0.02
3.2
0
4.8
4.84
4.84
0
0.03
1
0.4
8
1.6
1.6
1.6
0
3.17
4.9
2.5
2.5
0
2.47
0
0
0
3.2
3.21
1.58
5.52
5.52
5.52
0
5.3
5.52
5.52
12.1
STOP PLAYMODE
PIN NO.
3.2
0
3.2
1.6
0
0
1.8
0
3.2
2.14
0.53
0
2.16
3.2
0
3.15
2.7
3
2.3
0.25
0.44
0
0
0.06
0.25
0.25
3.2
0
0.36
0.34
0
0.32
0.32
0.32
0.32
0
3.18
1.77
0.33
0
0
0
0
0
0
0
0
0.32
3.23
0.31
0.3
0
0.3
0
3.25
1
3.25
1
1
0
1
1
3.25
1
1
0
0.9
3.25
0.9
0.81
0.82
0.83
0.82
0.83
0.8
0.8
0.8
0.8
0.84
0.83
3.22
0
1
1
1.05
1.03
1
1
1
0
3.2
1.8
1.04
0
0
0
3.22
0
0
0
0
0
3.22
3.22
1
0
1
0
IC602
STOP PLAYMODE
PIN NO.
3.2
3.2
0.01
3.2
3.18
0
3.18
3.17
3.2
0
3.2
4.08
3.2
0
0
3.2
3.2
0.01
0.01
0.03
3.18
0.01
3.2
3.18
3.2
3.2
0
0
0.8
0.54
0.53
0.54
0.56
0.6
0.77
0.8
3.16
0.82
0.77
0.76
0.7
0.77
0.74
0.73
0.75
0
3.16
3.2
0
1.68
0
1.7
4.28
3.22
3.2
0.01
3.22
3.22
0.01
3.22
3.22
3.22
0
3.22
4.1
3.22
0
0
3.22
3.22
0.01
0.01
0.01
3.22
0.01
3.22
3.22
3.22
3.22
0
3.2
0.93
0.95
0.8
0.78
0.74
0.76
0.8
0.9
3.2
3.2
0.8
0.76
0.8
0.83
0.82
0.83
0.8
0
3.2
3.2
0
0.95
0
1.26
3.44
IC603
IC609
NC(TEST PIN)
NC(TEST PIN)
NC(TEST PIN) NC(TEST PIN)
NC(TEST PIN) NC(TEST PIN)
NC(TEST PIN)
NC(TEST PIN)
IC604
STOP PLAYMODE
PIN NO.
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
1
2
3
4
5
6
7
8
9
10
1.7
5.2
0
2.3
0
0
0.09
3.2
0
2.6
0
1.31
0
0
5.23
4.97
2.31
0
1.32
0
1.08
0
2.4
0.05
2.31
4.2
2.3
4.97
2.34
0
0
0
2.38
0
2.34
0
0
1.56
0.03
0.03
2.38
0.03
4.96
1.4
0
2.45
3.1
0
0
3.15
0
3.15
1.35
5.2
3.2
0.1
0
0
5.23
3.2
0
2
0
1.11
0
0
5.23
4.95
2.26
4.95
1.43
0.01
1.45
0
2.3
0.05
2.25
4.2
2.265
4.9
2.26
0
2.3
0
2.3
0
2.3
1.8
0
1.66
0
0.03
2.31
0.03
4.94
0.06
1.6
2.52
3.21
0
3.2
3.2
3.2
3.2
STOP PLAYMODE
PIN NO.
3.15
3.15
3.1
3.1
1.6
0
0
1.56
0
0
0
0
0.05
3.2
0.8
0.05
0.49
0.63
0
1
3.19
0
0.5
0.7
0.55
0
1.28
1.68
0.05
0.4
0.6
2.45
2.43
2.46
0.8
0
0
1.77
2.9
0
0
0
0
0
0
1.2
1.28
1.56
1
1
1.11
1.11
1.11
3.2
3.2
3.17
3.21
1.68
0
0.65
0
1.35
0
0
0
0
0.05
0.84
0.66
0.58
0
0.03
1.3
3.22
0
0
0.7
0.55
0.02
1.3
1.66
0
2.5
2.44
3.21
2.42
2.46
0.01
0.01
0.01
0
1.67
0
0
1.6
1.6
0
0
0.09
0
0
1.07
1
0
0
0
STOP PLAYMODE
1.11
0.03
0
1
0.96
0.93
0.23
1
0
0
0.53
2.4
2.4
3.2
3.22
3.22
0
0
3.22
1.78
0
1.3
1.8
1.21
1.3
1.4
2.3
2
1.4
0.82
0.81
1.71
1.75
0
0
0.92
0.93
0.93
0.93
2.52
2.57
2.57
2.26
1.65
3.18
0
0
3.2
0.47
3.2
3.2
0.02
0.03
0
1.7
0
0.64
0.64
0.64
0.62
3.14
0.01
0.15
0.04
2.41
2.46
3.06
3.13
3.13
0.01
0.01
3.22
1.83
0
0.63
0.81
0.7
0.7
1.2
0.7
0.7
0.7
0.69
0.68
1.7
1.8
0
0.7
0.7
0.66
0.67
0.66
0.65
2.38
2.5
1.68
3.2
0.03
0
0
3.2
0.9
3.2
3.2
0.02
0.03
IC201
IC202
IC203
IC401
IC402
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
1
2
3
4
5
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
PIN NO.
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
STOP PLAYMODE
0.02
3.19
1.79
1.69
1.56
0
1.79
0
4.1
3.08
2.27
2.26
3.18
3.19
3.18
0
3.18
3.18
3.18
3.16
3.19
3.19
0
3.2
3.2
0.45
0.43
0.47
0.42
0.48
1.03
1.03
1.76
0
0
1.03
1.04
1.05
1
0.94
0.92
1.04
1.05
3.24
0
3.19
0
3.2
3.19
0.77
0
3.19
0.77
0.02
3.21
1.93
1.66
1.66
0
1.79
0
4.1
3.24
3.23
3.22
3.22
3.22
3.22
3.21
3.21
3.2
3.22
0
3.22
0
3.22
3.22
3.22
0
3.22
3.21
3.21
3.21
3.21
0
3.23
0
0
0.98
0.99
0.99
0.98
0.98
0.98
0.98
1
3.22
0
0.81
0.81
0.81
0.81
0.01
0.01
3.2
0.01
PIN NO.
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
STOP PLAYMODE
3.17
3.17
1.68
0
0
0
0
0
0
0
0
0
0
2.23
2.2
0
2.92
0
2.3
1.7
0
0
2.22
0
0
0
0
2.22
3.2
2.24
2.28
0.01
0
0
0.01
0.24
3.22
2.65
3.22
2.1
3.2
3.2
1.66
0
0.01
3.2
3.2
0.01
3.2
3.2
3.2
3.2
3.2
3.2
3.2
3.2
0
3.2
2.46
2.48
2.52
0
2.4
2.38
2.39
2.15
3.23
2.36
2.37
1.67
0
2.4
2.4
0
0
0
3.25
3.25
2.37
0.01
PIN NO.
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
IC503 (AT49BV8192A)
• CIRCUIT VOLTAGE CHART
IC601
3-79 3-80
+ -EE PLAY
- +Tran-sistor
C201
C202
C209
C217
C218
C220
C221
C233
C242
C251
C252
C255
C262
C263
C402
C403
C405
C406
C407
C408
C413
C414
C415
C617
C626
C632
C645
C646
C647
C648
C650
C651
C661
C663
C664
C665
C666
C667
C669
C673
0.1
0.1
8.1
8.1
4.93
5.1
2.1
1.76
3.23
3.25
1.8
5.1
3.26
1.8
5
3.16
2.5
5.55
5.55
5.55
12.17
5.55
5.55
3.2
3.2
3.2
3.2
1.8
3.2
3.2
1.8
1.7
2.3
1.6
2.3
2.3
2.3
5
0
1.3
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
2.5
0
2.44
0
0
0
0
0
0
0
0
0
0
0
0
0.7
0.6
0.6
0.66
0.794
0
2.39
0.81
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
2.5
0
2.46
0
0.06
0.06
0
0
0
0
0
0
0
0
0
0.7
0.5
0.5
0.8
0.6
0
2.3
0.68
2.45
0.1
8
8.04
4.94
5.03
2.11
1.75
3.22
3.24
1.77
5.02
3.24
1.8
4.95
3.14
2.47
5.51
5.51
5.51
12.07
5.5
5.5
3.21
3.23
3.2
1.77
3.22
3.22
1.7
2.33
1.65
2.33
2.34
2.33
4.94
0
1.4
B BEE PLAYE EC C
Tran-sistor
Q204
Q205
Q206
Q207
Q208
Q209
Q210
Q401
Q402
Q403
Q404
Q405
7.5
4.9
4.9
0
0.1
1.11
2.5
0
3.67
4.45
7.5
3.65
4.8
2.45
0.1
1.1
2.63
0
0
5.22
8
5.06
5.01
0
0
0.4
1.86
1.45
4.37
5.2
4.9
2.32
0.02
3.66
4.8
2.6
3.2
-0.37
-0.64
0
4.9
0
0
4.9
4.91
0
3.2
0.76
2.32
5.17
0
4.34
5
1.68
0
0.3
0
0
0
5.2
POSITION DRAWING OF DECKMECHANISM PARTS• Top View......................................................4-1• Bottom View ...............................................4-1
DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM01.Assembly and disassembly of Drum.........4-202.Plate Top disassembly ..............................4-403.Holder Assembly CST...............................4-404.Disassembly of Gear Assembly
Rack F/L....................................................4-405.Opener Door .............................................4-406.Arm Assembly F/L .....................................4-407.Lever Assembly S/W.................................4-408.Motor Assembly L/D..................................4-509.Gear Wheel ...............................................4-510.Arm Assembly Cleaner..............................4-511. Head F/E ...................................................4-512.Base Assembly A/C Head .........................4-513.Brake Assembly T .....................................4-614.Arm Assembly Tension..............................4-615.Reel S / Reel T..........................................4-616.Base Assembly P4 ....................................4-717.Opener Lid ................................................4-718.Arm Assembly Pinch .................................4-719.Arm T/up ...................................................4-720.Supporter, Capstan ...................................4-821.Belt Capstan/Motor Capstan.....................4-822.Lever F/R ..................................................4-823.Clutch Assembly D37................................4-824.Gear Drive/Gear Cam ...............................4-925.Gear Sector...............................................4-926.Brake Assembly Capstan..........................4-927.Plate Slider................................................4-928.Lever Tension............................................4-929.Lever Spring..............................................4-930. Lever Brake..............................................4-931.Gear Assembly P2/Gear Assembly P3 ...4-1032.Base Assembly P2/Base Assembly P3...4-1033.Base Loading ..........................................4-1034.Base Tension ...........................................4-1135.Arm Assembly Idler Jog ..........................4-11
DECK MECHANISM ADJUSTMENT• Fixtures and tools for service ................4-121. Check of Mechanism Assembly Mode....4-132. Previous Preparation for
Deck Adjustment .....................................4-143. Torque Measuring ...................................4-144. Adjustment of Guide Roller Height..........4-15
4-1. Prior Adjustment...............................4-154-2. Fine Adjustment ...............................4-15
5. Adjustment of Audio/Control (A/C) Head..4-165-1. Prior Adjustment...............................4-165-2. Check of Tape Path between Pinch
Roller and Take-up Guide ................4-175-3. Fine Adjustment
(Azimuth Adjustment).......................4-176. X-distance Adjustment ............................4-177. Adjustment of Drum Assembly
(Video Heads) .........................................4-188. Tachometer Adjustment of
Deck Assembly........................................4-188-1. Check of Audio, RF Normalization
Time (Locking Time) in Play after CUE or REV.....................................4-18
8-2. Check of Tape Curl and Jam Status .......................................4-18
MAINTENANCE AND CHECK OFVIDEO FUNCTION1. Checking Points before Repair ...............4-192. Essential Check and Maintenance..........4-203. Regular Check and Maintenance............4-204. Tools for Check and Maintenance...........4-205. Maintenance Course ...............................4-20
5-1. Removal of Foreign Materials..........4-205-2. Grease Application...........................4-21
GUIDE FOR TROUBLESHOOTING1. Deck Mechanism.....................................4-232. Front Loading Mechanism.......................4-26
EXPLODED VIEWS1. Front Loading Mechanism Section...........4-282. Moving Mechanism Section(1) .................4-293. Moving Mechanism Section(2) .................4-30
SECTION 4 MECHANISM OF VCR PART(D-37)CONTENTS
POSITION DRAWING OF DECK MECHANISM PARTS
4-1
5
4
3
2
6
9
10
8
12
18
16
1917
13
15
11
1
33
14
7
15
35
• Top View
• Bottom View
21
21
24
23
22
31
32
31
32
25
3428
27
29
20
2630
24
1 Drum Assembly 3 screws A-1 T
2 Plate Top 2 hooks A-2 T
2 3 Holder Assembly CST 6 chasses A-2 T
2,3 4 Gear Assembly Rack F/L 1 hook A-2 T
2,3,4 5 Opener Door Chassis Hole A-2 T
2,3,4,5 6 Arm Assembly F/L Chassis Hole A-2 T
7 Lever Assembly S/W Chassis Hole, A-2 T
1 hook
8 Motor Assembly L/D 1 screw A-3 T
9 Gear Wheel 2 hooks A-3 T
10 Arm Assembly Cleaner Chassis Embossing A-3 T
11 Head F/E Chassis Embossing A-3 T
12 Base Assembly A/C Head 1 screw A-3 T
2,3 13 Brake Assembly T 1 hook A-4 T
2,3 14 Arm Assembly Tension 1 hook A-4 T
2,3,13,14 15 Reel S / Reel T Shaft A-4 T
16 Base Assembly P4 Chassis Embossing A-5 T
17 Opener Lid Chassis Embossing A-5 T
17 18 Arm Assembly Pinch Shaft A-5 T
17 19 Arm T/up 1 hook A-5 T
20 Supporter, capstan Chassis Hole A-6 B
17,18 21 Belt Capstan/Motor Capstan 3 screws A-6 B
22 Lever F/R Locking Tab A-6 B
21, 22 23 Clutch Assembly D37 Washer A-6 B
24 Gear Drive/Gear Cam Washer/Hook A-7 B
25 Gear Sector Hook A-7 B
21 26 Brake Assembly Capstan Chassis Hole A-7 B
21,22,23, 27 Plate Slider Chassis Guide A-7 B
24,2526
21,22,23, 28 Lever Tension 1 Hook A7 B
24,2526,27
21,22,23, 29 Lever Spring 1 Hook A-7 B
24,2526,27
21,22,23, 30 Lever Brake 1 Hook A-7 B
24,2526,27
25 31 Gear Assembly P2/ Bass A-8 B
Gear Assembly P3
2, 3, 14, 32 Base Assembly P2 6 Chasses A-8 B
25, 31 /Base Assembly P3
25, 31 33 Base Loading 3 Hooks A-8 B
2,3,14 34 Base Tension Chassis Embossing A-9 T
35 Arm Assembly Idler Jog Locking Tab A-9 T
Parts firstly Disassembled
Order Of Dis-assembled Part Fixing Type
Ref.Draw-ings
Position
NOTE : Assembly order is a reverse of disassembly order.
(1) For assembly, check the assembly mode is accurate. (2) Parts firstly disassembled indicate parts firstly disassem-
bled in disassembly of related parts.
T:Top, B:Bottom
4-2
DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM
Cap, FPC
Drum Assembly
Cable Flat
(S1) (S1)
(S1)
Holder FPC
H1
H2
1. Disassembly of Drum Assembly(Figure A-1)
1) Separate cable flat from the Drum FPC and the CapstanMotor.
2) Release 3 screws (S1) on the bottom side of the chassis,and separate the drum assembly.
3) Release the hooks (H1, H2) and separate both the holderFPC and the Cap FPC (disassemble if necessary).
Fig. A-1
Cautions in assembly of FPC
Holder FPC
Drum FPC
Cap FPC
Assembly shape seen in the reverse direction
DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM
4-3
(B)
(E)
(C)
Plate Top
Arm Assembly F/L
Gear Assembly Rack F/L
Opener Door
Holder Assembly CST
(B')
(H3)
(A) (B)
Lever Assembly S/W
(H4)
(E)
Fig. A-2
(Fig. A-2-1)
(Fig. A-2-2)
(Fig. A-2-5)
(Fig. A-2-6)
(Fig. A-2-3)
(Fig. A-2-4)
2. Disassembly of Plate Top (Fig. A-2-1)
1) Separate the right part while leaning back the (B) part ofthe plate top toward the arrow direction.
2) Separate the left part while leaning back the (B’) part ofthe plate top toward the arrow direction.(Tool used: Tool such as (-) driver, auger, etc with point-ed or flat end)
CAUTIONSAssemble while pressing the (C), (C’) part after correspond-ing them as in drawing.
3. Holder Assembly CST (Fig. A-2-2)
1) Firstly separate the left part from the groove on the (D)part of chassis while moving the holder assembly CSTtoward the arrow direction.
2) Separate the right part from each groove of chassis
CAUTIONS
Assemble by inserting the left part after firstly inserting the(E) part of the holder assembly CST into the groove on the(E’) part of chassis.
4. Disassembly of Gear Assembly Rack F/L (Fig. A-2-3)
1) Separate the hook (H3) while leaning ahead the hook (3)after moving the gear assembly rack F/L toward the arrow(A) direction.
2) Separate the gear assembly rack F/L toward the arrow (B)direction.
CAUTIONS
For the assembly, correspond the gear part of gear assem-bly rack F/L to the gear drive.
5. Opener Door (Fig. A-2-4)1) Separate the opener door ahead from the guide hole of
chassis while turning it clockwise.
6. Arm Assembly F/L (Fig. A-2-5)1) Firstly separate the left part of the arm assembly F/L from
the groove of chassis while pushing the arm assembly F/Ltoward the arrow direction.
2) Separate the right part from the groove of chassis.).
7. Lever Assembly S/W (Fig. A-2-6)1) Separate the lever assembly S/W while pushing it toward
the arrow direction after removing the hook (4) on the leftside of chassis.
4-4
DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM
(B')
(C')
(C)
(B)
(D)
Holder Assembly CST Chassis
Chassis
(H4)
Gear Rack F/L
Gear Drive
DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM
4-5
8. Motor Assembly L/D (Fig. A-3-1)1) Take the connector (C1) connected to the Capstan motor
PCB out. 2) Remove a screw (S4) of the chassis (S4) and step back-
ward, and disassemble it while holding it up.
9. Gear Wheel (Fig. A-3-2)1) Release the hook (H5) of the gear wheel and disassemble
it upward.
10. Arm Assembly Cleaner (Fig. A-3-3) 1) Separate the (A) part of Fig. A-3-1 from the embossing of
chassis, and hold it up while turning it anti-clockwise.
11. Head F/E (Fig. A-3-4)1) Separate the (A) part of the head F/E from the emboss-
ing of chassis, and hold it up while turning it anti-clock-wise.
12. Base Assembly A/C Head (Fig. A-3-5)1) Release a screw (S5) and disassemble while holding it up.
Arm Assembly Cleaner
Motor Assembly L/D
Gear Wheel
Base Assembly A/C Head
(S4)
(S5)
Head F/E
(A)
(C1)
(H5)
(A)
Fig. A-3
(Fig. A-3-3)
(Fig. A-3-5)
(Fig. A-3-4)
(Fig. A-3-2)
(Fig. A-3-1)
4-6
DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM
Brake Assembly T
Reel T
Spring Tension
Arm Assembly Tension
Spring Tension
Reel S
(H7)
(H8)
(H6)
Fig. A-4
13. Brake Assembly T (Fig. A-4-1)1) Release the spring tension from the lever spring hook
(H6). 2) Disassemble the brake assembly T while holding it
upward.
14. Arm Assembly Tension (Fig. A-4-2)1) Release the spring tension the hook (H7) from the arm
assembly tension. 2) After releasing the hook (H8) of the base tension, sepa-
rate it while holding it up.
CAUTIONS
Spring used for both brake assembly T and arm assemblytension is used (2EA used).
15. Reel S/Reel T (Fig. A-4-3)
1) Disassemble the reel S/ reel T while holding it up (com-parison between Reel S and Reel T)
Reel S Reel T
(Fig. A-4-3)
(Fig. A-4-2)
(Fig. A-4-1)
(Fig. A-4-3)
DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM
4-7
Opener Lid
Arm Assembly Pinch
Base Assembly P4
Arm T/up(A)
(B)
(C)
Chassis
(C)
(H9)
Fig. A-5
16. Base Assembly P4 (Fig. A-5-1)1) Release the (A) part of the base assembly P4 from the
embossing of chassis.2) Hold the base assembly P4 up while turning it anti-clock-
wise.
17. Opener Lid (Fig. A-5-2)1) Release the (B) part of the opener lid from the embossing
of chassis.2) Disassemble the opener lid upward while turning it anti-
clockwise.
18. Arm Assembly Pinch (Fig. A-5-3) 1) Hold the arm assembly pinch up.
19. Arm T/up (Fig. A-5-4)1) Turn the arm T/up to release the anchor jaw (H9) part of
chassis and then hold it upward.
CAUTIONS
For the assembly, check the (C) part of the arm assemblypinch is assembled as in drawing.
- REVERSE THE MECHANISM.
(Fig. A-5-2)
(Fig. A-5-1)
(Fig. A-5-3)
(Fig. A-5-4)
4-8
DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM
Chassis
(S6)
Belt Capstan
Motor Capstan
Washer(W1)
Lever F/R
Clutch Assembly D37
(L1)(L1)
Suppoter Capstan
Fig. A-6
20. Supporter, Capstan (Fig. A-6-1)1) Turn the supporter and Capstan by 90 deg. clockwise
with a driver for disassembly.
21. Belt Capstan (Fig. A-6-2) /Motor Capstan (Fig. A-6-3)
1) Separate the belt Capstan.2) Undo 3 screws (S6) on the bottom side of chassis and dis-
assemble it upward.
22. Lever F/R (Fig. A-6-4) 1) Release the locking tab (L1) and then disassemble it
upward.
23. Clutch Assembly D37 (Fig. A-6-5)1) Remove the washer (W1) and then disassemble it
upward.
(Fig. A-6-1)
(Fig. A-6-2)
(Fig. A-6-3)
(Fig. A-6-4)
(Fig. A-6-5)
DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM
4-9
Gear Drive
Washer (W2)
Gear �Cam
Plate Slider
Lever Tension
Lever spring
Base Loading
Gear Sector
(B)
(A)
(H10)
(W2)
(L2)
(H11)
Chassis
Gear Cam Hole(C)
Gear Cam Hole(B)
Gear Drive Hole(A)
Brake Assembly Capstan
Lever Brack
Fig. A-7
24. Gear Drive (Fig. A-7-1)/Gear Cam (Fig. A-7-2)
1) Remove the washer (W2) and then disassemble thegear drive.
2) Release the hook (H10) of the gear cam and then disas-semble it upward.
CAUTIONS
For the assembly, adjust both the gear driver hole (A) andthe gear cam hole (B) straightly and then correspond thegear cam hole (C) to the chassis hole.
25. Gear Sector (Fig. A-7-3)1) Release the hook (H11) of the gear sector and then hold
the gear sector upward.
26. Brake Assembly Capstan (Fig. A-7-4)
1) Release the locking tab (L2) on the bottom side of theplate slider and then disassemble it upward.
27. Plate Slider (Fig. A-7-5)1) Disassemble the plate slider while holding it up.
28. Lever Tension (Fig. A-7-6)1) Release the lever tension from the guide (A) of chassis
while turning it anti-clockwise. 2) Disassemble the lever tension while holding it up.
29. Lever Spring (Fig. A-7-7)1) Release the (B) part of the lever spring from the guide
(A) of chassis while turning it anti-clockwise. 2) Disassemble the lever tension while holding it up.
30. Lever Brake (Fig. A-7-8)1) Disassemble the lever brake while holding it up.
(Fig. A-7-4)(Fig. A-7-5)
(Fig. A-7-8)(Fig. A-7-7)
(Fig. A-7-6)
(Fig. A-7-1)
(Fig. A-7-2) (Fig. A-7-3)
4-10
DECK MECHANISM DISASSEMBLY
Gear Assembly P3
Gear Assembly P2
Base Assembly P2
Base Assembly P3
(A)(B)
(H14)
(H12) (H13)
Chassis
Gear assembly P2 Hole
Gear assembly P3 Hole
Lever Tension Boss
Plate slider Hole(B)
Base Loading
Fig. A-8
31. Gear Assembly P2 (Fig. A-8-1)/Gear Assembly P3 (Fig. A-8-2)
1) Hold the gear assembly P2 upward.2) Hold the gear assembly P3 upward.
CAUTIONS
For the assembly, check the holes of both the gear assem-bly P2 and the P3 are adjusted straightly, and then corre-spond the gear section groove (A) to the plate slider hole (B).
32. Base Assembly P2 (Fig. A-8-3)/Base Assembly P3 (Fig. A-8-4)
1) Disassemble the base assembly P2 downward while mov-ing it toward the arrow (A) direction along with the guidehole of chassis.
2) Disassemble the base assembly P2 downward while mov-ing it toward the arrow (B) direction along with the guidehole of chassis.
33. Base Loading (Fig. A-8-5)1) Release 3 hooks (H12, 13, 14) of the base loading, and
then disassemble them upward.- Reverse the mechanism.
(Fig. A-8-1)
(Fig. A-8-2)
(Fig. A-8-5)
(Fig. A-8-4)(Fig. A-8-3)
DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM
4-11
(A)
(B) (C)
Arm Assembly Idler Jog
Base Tension
Chassis(D)
Fig. A-9
34. Base Tension (Fig. A-9-1)1) Release the (A) part of the base tension from the
embossing of chassis.2) Hold the base tension upward while turning it anti-clock-
wise.
35. Arm assembly Idler Jog (Fig. A-9-2)1) Push both (B), (C) parts in Fig. A-9-2 toward the arrow
direction.2) Disassemble the arm assembly idler upward.
CAUTIONS
Take care to ensure that the (D) part in the drawing is nothung to chassis in disassembly.
(Fig. A-9-1)
(Fig. A-9-2)
DECK MECHANISM ADJUSTMENT
4-12
• Fixtures and Tools for Service
1. Cassette Torque MeterSRK-VHT-303(Not SVC part)Part No:D00-D006
4. Torque gauge adaptorPart No:D09-R001
5. Post height adjusting driverPart No:DTL-0005
6. + Type driver (ø5)
2. Alignment tapePart No NTSC:DTN-0001PAL:DTN-0002
3. Torque gauge600g.Cm ATGPart No:D00-D002
SRKVIDEOCASSETTETORQUEMETERVHT-303
SR
K
- VH T- S
SRK- V HT- T
300250
200150
500
300250
200
150
500
100
Purpose of adjustment : To make tools normally operate by positioning tools accurately.
DECK MECHANISM ADJUSTMENT
4-13
1) Turn the VCR on and take the tape out by pressing theeject button.
2) Separate both top cover and plate top, and check boththe hole (A) of gear cam and the hole (A’) of chassis cor-respond (Fig. C-2).
3) If it is done as in the paragraph 2): Turn the gear cam asin No.2) after mantling the motor assembly L/D.
4) Undo the screw fixing the deck and the main frame, andseparate the deck assembly. Check both the hole (A) ofgear cam and the hole (A’) of chassis correspond (Fig.C-1).
5) Check the mode S/W on the main P.C. board locates ata proper position as in (B) of the Fig. (C-1).
6) Connect the deck to the main P.C. board and perform alltypes of test.
Gear Cam
Gear Drive
(C)
Mode S/W
(B)
Motor Assembly L/D
Gear Cam
Chassis Hole Gear Cam Hole
(A)
(A')
Fixtures and tools used VCR (VCP) status Checking Position
• Blank Tape (empty tape)• Eject Mode
(with cassette withdrawn)• Mechanism and Mode Switch
Fig. C-1
Fig. C-2
CHECK DIAGRAM
BOTTOM VIEW
TOP VIEW
Correspondence of the gear cam hole (O)and the gear drive hole (O)
1. Mechanism Assembly Mode Check
Purpose of Measuring : To measure and check the reel torque on the take-up part and thesupply part that performs basic operation of the VCR (VCP) forsmoothly forwarding the tape. Measure and check followings when the tape is not smoothlywound or the tape velocity is abnormally proceeded:
4-14
• Torque Gauge (600 g.cm ATG)
• Torque Gauge Adaptor• Cassette Torque Meter
SRK-VHT-303
• Play (FF) or Review(REW) Mode
• Try to operate the VCR (VCP) per mode with thetape not inserted (See ‘2. Prior Preparation forDeck Adjustment).
• Measure after adhering and fixing the torquegauge adaptor to the torque gauge (Fig. C-3-1)
• Read scale of the supply or take-up part of thecassette torque meter (Fig. C-3-2).
DECK MECHANISM ADJUSTMENT
1) Take the power cord from the consent.2) Separate the top cover and the plate assembly top.3) Insert the power cord into again.4) Turn the VCR (VCP) on and load the cassette while push-
ing the lever stopper of the holder assembly CST back-ward. In this case, clog both holes on the housing rail part of chassis to prevent detection of the end sensor.
If doing so, proceeding to the stop mode is done. In thisstatus, input signals of all modes can be received.However, operation of the Rewind and the Review isimpossible since the take-up reel remains at stop statusand so cannot detect the reel pulse (however, possible forseveral seconds).
2. Previous Preparation for Deck Adjustment(Preparation to load the VCR (VCP) with cassette tape not inserted)
3. Torque Measuring
NOTE
Adhere the torque gauge adaptor to the torque gauge for measuring the value.
SRKVIDEOCASSETTETORQUEMETERVHT-303
SR
K
- VH T- S
SRK- V HT- T
300250
200150
500
300250
200
150
500
100
Fig. C-3-2Fig. C-3-1
Torque Gauge
Torque GaugeAdaptor
Reel Table
Item
Fast forward Torque
Rewind Torque
Play Take-Up Torque
Review Torque
Fast Forward
Rewind
Play
Review
Torque Gauge
Torque Gauge
VHT-303
VHT-303
Take-Up Reel
Supply Reel
Take-Up Reel
Supply Reel
More than 400g°cm
More than 400g°cm
40~100g°cm
120~210g°cm
Mode Instruments Reel Measured Measuring Value
• Cassette Torque Meter (SRK-VHT-303)• Torque Gauge (600g.cm ATG)
VCR (VCP) status Measuring methodFixtures and tools used
Adjustment Procedure1) Travel the tape and check the bottom surface of the
tape travels along with the guide line of the lower drum.2) If the tape travels toward the lower part of guide line on
the lower drum, turn the guide roller height adjustingscrew to the left
3) If it travels to the upper part, turn it to the right.4) Adjust the height of the guide roller to ensure that the
tape is guided on the guide line of the lower drum at theinlet/outlet of the drum. (Fig. C-4-1)
DECK MECHANISM ADJUSTMENT
4-15
Fig. C-4-1
GUIDE ROLLERHEIGHT ADJUSTMENT SCREW
ADJUSTMENT DIAGRAM
Purpose of adjustment : To ensure that the bottom surface of the tape can travel along withthe tape lead line of the lower drum by constantly and adjusting and maintaining the height of the tape.
4. Guide Roller Height Adjustment
Fixtures and tools used VCR (VCP) status Adjustment position
• Post Height AdjustingDriver
• Play or Review Mode• The guide roller height adjusting screw on the
supply guide roller and the take-up guide roller
4-1. Prior Adjustment
1) Play the standard test tape after connecting the probe ofoscilloscope to the RF envelope output point and thehead switching output point.
2) Tracking control (playback) : Locate it at the center(Set the RF output to the maximum value via the track-ing control when such adjustment is completed after thedrum assembly is replaced.)
3) Height adjusting screw: Flatten the RF waveform.(Fig. C-4-2)
4) Move the tracking control (playback) to the right/left.(Fig. C-4-3)
5) Check the start and the end of the RF output reductionwidth are constant.
CAUTIONS
There must exist no crumpling and folding of the tape dueto excess adjustment or insufficient adjustment.
Fig. C-4-2
Fig. C-4-2
P2 POST ADJUSTMENT
P3 POST ADJUSTMENT
CH-1 CH-2
RF ENVELOPE OUTPUT POINT
HEAD RF SWITCHING OUTPUT POINT
Flatten the waveform bylightly turning theguide roller height adjust-ment screw.
When turning the trackingcontrol to both sides.
OSCILLOSCOPE
When the tracking controllocates at the center.
Waveform
Connection Diagram
Fixtures and tools usedMeasuring tools and connection position
VCR (VCP) status Adjustment position
• Oscilloscope• Standard test tape• Post height adjusting
driver
• CH-1: PB RF Envelope• CH-2: NTSC : SW 30Hz
PAL : SW 25Hz• Head switching output
point• RF Envelope output
point
• Play the standard testtape.
• Guide roller heightadjusting screw
4-2. Fine Adjustment
4-16
DECK MECHANISM ADJUSTMENT
8.3
Fig. C-5-1
A/C Head Base
Fig. C-5-2
Height AdjustmentScrew(B)
Tilt AdjustmentScrew(C)
AzimuthAdjustmentScrew(A)
X-Value AdjustmentHole
Fig. C-5-3
A/C Head Tape
Tape
0.2~0.25mm
P4
A/C Head Assembly
Purpose of adjustment : To ensure that audio and control signals can be recorded andplayed according to the contract tract by constantly maintainingdistance between tape and head, and tape tension between the P3post and the P4 post.
5. Audio/Control (A/C) Head Adjustment
Adjustment Procedure/Adjustment Diagrams1) Basically use the A/C head assembly adjusted as in
SPEC.2) Check there is crumpling and folding of the tape around
the A/C head. If it is, Turn and adjust the tilt adjustingscrew to ensure that the tape corresponds to the bottomguide of the P4, and recheck the tape path after pro-ceeding play for 4-5 seconds.
3) Where the tape bottom is not equal to Fig. C-5-3, Adjustthe height by using the height adjusting screw (B) andthen readjust it by using the tilt adjusting screw (C).
CAUTIONS
Always check the height of the A/C head since most idealheight of A/C head can be obtained when the bottom partof the tape is away 0.2 ~ 0.25mm from the bottom part ofthe A/C head.
Fixtures and tools used VCR (VCP) status Adjustment position
• Blank Tape(Empty Tape)
• Driver (+) Type ø 5
• Play the blank tape(empty tape).
• Tilt adjusting screw (C)• Height adjusting screw (B)• Azimuth adjusting screw (A)
5-1. Prior Adjustment (performed only when no audio output appears in play of the standard test tape)
Fixed Screw
Adjustment Procedure1) After releasing the auto tracking, lightly turn the fixing
screw. Turn the (+) type driver (Ø 3 ~ Ø 4) on the X-dis-tance adjusting hole to the right or left. Adjust the RFenvelope level to the maximum point and then fix the fix-ing screws.
2) For the 31mm head, adjust it with the SP tape recordedin the width of 31mm since the head travels on the tapetrack only for SP with the width of 58mm.
DECK MECHANISM ADJUSTMENT
4-17
5-2. Tape Path Check between Pinch Roller andTake up Guide (Check in the Rev Mode)
1) Check the tape pass status between the pinch roller andthe take-up guide.(Check there is crumpling of the tapepass and folding of the take-up guide.)
1) (1) When holding of the take-up guide bottom occurs Turn the tilt adjusting screw (C) clockwise and travel itstably to ensure there is no crumbling or folding of thetape.
1) (2) When holding of the take-up guide top occursTurn the tilt adjusting screw (C) anti-clockwise and
travel it stably to ensure there is no crumbling or fold-ing of the tape.
1) 2) Check there is folding of the tape at the bottom or topof the take-up guide in cutting-off the REV mode
CAUTIONS
If the RF waveform is changed after adjusting the A/C head,perform fine adjustment to ensure the RF waveform is flat-tened.
Adjustment Procedure1) Connect the probe of Oscilloscope to the audio output
jack.2) Ensure that Audio 1KHz, 7KHz output is flattened at the
maximization point by adjusting the Azimuth adjustingscrew (A). Fig. C-5-4
Fixtures and tools used Connection position VCR (VCP) status Adjustment position
• Oscilloscope• Standard test tape
(only for SP)• Driver (+) Type Ø 4
• Audio Output Jack • Play the standard test • Tape, 1KHz, 7KHz.
• Azimuth AdjustingScrew (A)
• Height Adjusting Screw(B)
5-3. Fine Adjustment (Azimuth Adjustment)
1KHz
A: Maximum
7KHz
B: Minimum
Fig. C-6
Fixtures and tools used Connection position VCR (VCP) status Adjustment position
• Oscilloscope• Standard test tape
(only for SP)• Driver (+) Type Ø 4
• CH-1: PB RF Envelope• CH-2: NTSC ; SW 30Hz
PAL:SW 25Hz• Head switching output
point• RF Envelope output
point
• Play the standard testtape.
6. X-distance Adjustment
Left
X-distance Adjusting Hole
Tilt Adjusting Screw (C)
Fixing Screw
Height Adjusting Screw (B)
Right
Grove of Base A/C
Purpose of adjustment : To maintain compatibility with other VCR (VCP).
RF ENVELOPE OUTPUT POINT
HEAD RF SWITCHING OUTPUT POINT
OSCILLOSCOPE
Connection Diagram
CH-2CH-1
AzimuthAdjustment
Screw(A)
Checking/Adjustment Procedure1) Play the blank tape (empty tape) and check whether the
guide roller crumbles or wrinkles the tape and adjust it ifnecessary.
2) Check that the RF envelope output waveform is flat, andadjust the height of the guide roller while playing thestandard test tape.
3) Adjust the switching point. 4) Check the RF envelope output is the maximum when
the tracking control locates at the center. If not maxi-mum, set up to ensure that RF envelope outputbecomes the maximum by turning the (+) type driver (Ø3 ~ Ø 4) on the base A/C groove.
4-18
DECK MECHANISM ADJUSTMENT
8-2. Check of Tape Curl and Jam Status
Fixtures and tools used Connection position VCR (VCP) status Adjustment position
• Oscilloscope• Standard test tape
(only for SP)• Post Height Adjusting
Driver • Driver (+) Type Ø 5
• CH-1: PB RF Envelope• CH-2: NTSC : SW 30Hz
PAL:SW 25Hz• Head switching output
point• RF Envelope output
point
• Play the blank tape. • Play the standard test
tape.
• Fine adjustment ofguide roller
• Switching Point • Tracking Preset• X-distance
7. Adjustment after Drum Assembly (Video Heads)
Purpose of adjustment : To adjust and stabilize the height change, X-distance change, etcdepending on the guide roller after assembling the drum.
RF ENVELOPE OUTPUT POINT
V2V1V1V1/V MAX = 0.7V1/V MAX = 0.8RF ENVELOPE OUTPUT
HEAD RF SWITCHING OUTPUT POINT
OSCILLOSCOPEConnection Diagram
Waveform
CH-2CH-1
Checking Procedure1) Check that locking time of the RF and Audio waveform is
fallen within the measuring standard in conversion of theplay mode from the CUE or the REV mode.
2) Readjust the paragraph 5 and 6 if it deviates from thestandard.
Fixtures and tools used Measuring standard Connection position VCR (VCP) status
• Oscilloscope• 6H 3KHz Color Bar
Standard Test tape • Stop Watch
• RF Locking Time: Within5 seconds
• Audio Locking Time :Within 10 seconds
• CH-1: PB RF Envelope• CH-2: Audio output• RF Envelope output
point • Audio output jack
• Play the 6H 3KHz Color Bar StandardTest tape.
8. Check of Traveling Device after Deck Assembly 8-1. Audio, RF Normalization Time (Locking Time) Check in Play after CUE or REV
Checking Procedure1) Check there is no abnormality of every traveling post
status. 2) There must be no abnormal operation of the counter in
occurrence of folding of the bottom tape. There must benot abnormality of audio signal in damage of the top tape.
3) If there is abnormality, readjust the adjustment para-graph 4 and 5.
Fixtures and tools used Fixtures and tools used Fixtures and tools used
• T-160 Tape• T-120 Tape
• There must be no jam or curl at thefirst, middle and end position of tape.
• Travel the tape at the positionof its first and end.
PROTECTION, MAINTENANCE AND CHECK OF VIDEO FUNCTION
4-19
(3) F/E Head
(5) Drum Assembly(Video Head)
(4) Base Assembly P2
(2) Tension Post
(1) Supply Reel
(6) Base Assembly P3
PhenomenaReplace-
mentChecking Points andCause
Color beat Pollution of Full-Erase Head o
S/N, Color Faded Pollution of Video Head o
Horizontal, Vertical Jitte o
CAUTIONS
If operation of the position with (O) mark is abnormal evenafter removing cause, replace it with substitute product sinceit shows damage or wearing.
(7) A/C Head
(8) P4 Post
(10) Pinch Roller
(11) Take-up GuidePost
(9) Capstan Shaft
(12) Take-up Reel
* No. (1) ~ (12) shows sequence that the tape moves from the supply reel to the take-up reel.)
Fig. C-9-1 TOP VIEW
Fig. C-9-2 BOTTOM VIEW
F/E Head
Video Head
A/C Head
Pinch Roller
Belt Capston
ClutchAssembly A37
Fig. C-9-3 Tape Transport System
Pollution of Video Head orTape Transport System
Poor Sound, Low Sound oPollution of Audio/ControlHead
oPollution of Pinch Roller orBelt Capstan Belt
No tape wound or tapewound loosely.FF or REW impossible,or slow turning
Deterioration of ClutchAssembly D37 Torque
Pollution of Drum andTraveling Device
Tape loosely wound inREV or Unloading
o
Fig. C-9-3
1. Checking Points prior to Repair Following abnormal phenomena may be repaired byremoval of foreign materials and oil supply. Check oiling isrequired at the checking set or cleaning status is complete. Determine that necessity of checking and repair the setexists after checking the using period of the set togetherwith the user. In this case, followings must be checked:
PROTECTION, MAINTENANCE AND CHECK OF VIDEO FUNCTION
4-20
2. Essential Check and RepairRecording density of the video is far higher than the audio.Therefore video parts are very precise so as to allow onlyerror of 1/1000mm or so in order to maintain compatibilitywith other videos. If one of these parts is polluted or old, same phenomena willappear as they are damaged.To maintain clear screen, regular check, replacement of oldand damaged parts and oil supply, etc are essential.
3. Regular Check and Repair Check and repair schedule is not constant since they varydepending on method that the consumer uses video andenvironment where the video is installed at. However, for the video used by common household, goodscreen will be maintained if regular check and repair per1,000 hour is performed. The following chart shows relation-ship between using time and checking time:
4. Tools for Check and Repair(1) Grease: Floil G-3114 (KANTO) or equivalent grease
(Green)(2) Grease: Kanto G-754, PL-433 (Yellow)(3) Alcohol (Isopropyl Alcohol)(4) Cleaning Patch (cloth)
5. Maintenance Process5-1) Removal of Foreign Material
(1) Removal of foreign material from video head (Fig. C-9-4)Firstly try to use a cleaning tape.
(1) Use a cleaning patch if foreign materials are not removedwith the cleaning tape due to severe dirty of the head. Soak the cleaning patch in alcohol and put it to the headtip. Smoothly turn the drum (turning cylinder) to the rightor left (In this case, the cleaning patch must not bemoved vertically).
(1) After completely drying the head, test the traveling statusof the tape.
(1) If alcohol (Isopropyl Alcohol) remains at the video head,the tape may be damaged when this solution toucheswith the head surface.
Never use a cloth bar (commercial sale)
(2) Wipe the tape transport system and the drive systemwith the cleaning patch soaked in alcohol (IsopropylAlcohol) when removing foreign materials from them. 1) The part touched with the traveling tape is called as
tape transport system. The drive system consists ofparts to travel the tape.
(2) 2) Care must be exercised so that unreasonable forceto change the pattern will be applied to the tape trans-port system during removal of foreign materials.
About1 year
One hour
Table 1
Two hours
Three hours
TimeRequiringChecking
Averagehours usedper day
About18 months
About3 years
Fig. C-9-4
Drum (Turning Cylinder)
Head Tip
Soak alcohol(Isopropyl Alcohol).
Cleaning Patch (Cloth)
Smoothly turn the drum (turningcylinder) touching the soft surfaceto the head tip surface.
PROTECTION, MAINTENANCE AND CHECK OF VIDEO FUNCTION
4-21
5-2) Grease Applications(1) Grease Application Method
Apply grease by using a cloth swab or brush. Care mustbe exercised so that excess quantity should not beused. If the excessive quantity is applied, wipe it withthe gauze soaked in alcohol (Isopropyl Alcohol).
NOTE: POSITION OF GREASE APPLICATION
(2) Regular Grease ApplicationApply grease to the designated application positionevery 500 hour.
5
4
2
13
(1) Inner Side Surface and TopSurface of Loading Path
(2) Stable Adhesion Part of BaseP2, P3
(3) Arm Pinch Shaft
(4) Gear Wheel Shaft (5) Reel S. T. Shaft
(1) (2) (3) (4): KG-684G(Green)(5): PL-433 (Yellow)
Cam Part(PL-433.Yellow)
Gear Part (PL-433.Yellow)
Boss Part Side Wall(PL-433.Yellow)
Gear Part Side Application(PL-433.Yellow)
Cam Part Side Application(KG-684G.Green)Gear Sector Gear Cam
Base Loading Gear Drive
Inner Surface ofGuide Rail
(KG-684G.Green)
Chassis (L) Chassis (R)
Gear Part
1
2
3
4
6
5 7
(1) Inner Side Surface and TopSurface of Loading Path
(2) Stable Adhesion Part of BaseP2, P3 Coil
(3) Gear Cam Shaft (4) Gear Drive Shaft(5) Clutch Shaft Groove
(6) Guide Part on the Plate SliderSide Wall (Left)
(7) Guide Part on the Plate SliderSide Wall (Right)(1) (2) (3) (4) (5) (6) (7): KG-684G (Green)
Chassis (TOP)
Chassis (Bottom)
Cam Part(KG-684G , GREEN) Cam Part
(KG-684G , GREEN)
Gear Rack F/L
Lever, Brake Driving Cam Part
Side Wall Guide PartLever F/R Driving Part Side Wall Guide Part
Lever, Spring Driving Part
Lever Tension Driving Cam Part
Gear Sector Driving Part
Plate Slider
PROTECTION, MAINTENANCE AND CHECK OF VIDEO FUNCTION
4-22
Lever, F/R, Base, Tension GEAR AY, P2 & P3
LEVER, F/R
Clutch Contact Part(PL-433, Yellow)
Tension Arm Party Hinge Part (PL-433, Yellow)
BASE, TENSIONPL-433
MECHANISM TROUBLESHOOTING GUIDE
4-23
No Auto Rewind operates.
Is output of the end sensor “H”? “H”: 3.5V or less“L”: 0.7V –1V or less
Is voltage at both ends of theIR LED 0.8V-1.5?
Replace the LED.
Is the end sensor Vcc applied at5V? Check the Syscon power supply.
Replace the end sensor.
Is the Syscon checked?
NO
YES
YES
YES
YES
NO
NO
1.Deck MechanismA.
NO
NO
NO
No F/R operates.
Is the current mode an F/Rmode?
Check the assembly position ofthe Mode S/W.
Is normal voltage applied at theVcc1 and the Vcc2 of theCapstan motor?
Is the Vctl terminal voltage of theCapstan Motor applied at morethan 4V?
Check the Servo, Power circuit.
Replace the Capstan motor.
Does the Capstan motor rotate?
Does the T/up and the supplyreel Operate?
Check the Syscon circuit.
YES
YES
YES
YES
YES
YES
B.
4-24
MECHANISM TROUBLESHOOTING GUIDE
Auto Stop operates.(PLAY/CUE/REV)
Does the T/UP or the supplyreel pulse occur?
Does the pinch roller attached tothe Capstan shaft turn in opera-tion of the Play/Cue/Rev.
Replace the reel sensor.
Is output of the DFG, DPGnormal?
Check the assembly mode.Check the spring pinch.
Replace the drum motor.
Check the Servo, Syscon.
Check the Syscon, µ-com.
No cassette loading is done.
Insert the cassette.
Check the holder assembly CST.
Does output of the CST IN S/Wchange? (In insertion of the REC tape:“L”_“H”_ “L”)(In insertion of the REC preven-tion tape:“L”_ “H”_ “L”_ “H”)
Is the CST IN S/W normal?
Is operation of the leverassembly S/W normal?
Check the Syscon circuit. Check the Syscon circuit.
Replace the CST IN S/W.
YES
YES
YES
YES YES
YES
NO
NO
NO
NO
NO NO
NOYES
C.
D.
4-25
MECHANISM TROUBLESHOOTING GUIDE
No tape winding is done inplay.
Is the pinch roller attached to theCapstan shaft in operation of play? Check the assembly mode?
Does the T/up reel operate? Hang the Capstan belt.Is the Capstan belt hung?
Does the drum motor turn?
Is the DPG, DFG normal?
Are the T/up and the reel sensornormal?
Check the Syscon circuit.
Check the Syscon circuit.
Check the Syscon circuit.
Does the Capstan motor turn?
Is the Vctl terminal voltage of thedrum motor at more than 2.3V?
Replace the drum motor.
Is the Vcc voltage of the drummotor normal?
Check the clutch and the idlerassembly.
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
Is the Vctl terminal voltage ofthe Capstan motor applied atmore than 4V?
Replace the Capstan motor.
Is normal voltage applied to thecapstan motor Vcc1, Vcc2?
YES
YES
YES
Check the Servo, power circuit.NO
NO
NO
E.
MECHANISM TROUBLESHOOTING GUIDE
4-26
No cassette insert is done.
Does the lever assemblyswitch operate?
Is the lever assembly switchspring normal?
Does the CST IN switchoperate normally?
Add or replace the leverassembly switches spring.
Is the Vcc of the main P.C.Bassembly?
YESYES
Check the Syscon circuit.
YES
Check the power circuit.
NO
Is voltage between the cassetteswitch terminal and the GND onthe main P.C.B assembly?
YES
Is there short between the cassette switch terminaland the GND on the main P.C.B assembly?
Replace the main P.C.B assem-bly or remove the short part.
NO
Check the mode switch positionand the Syscon circuit.
Replace the CST IN switch.
YES
NOYES
NO NO
Replace the F/L switch.NO
NO
No cassette eject is done.
Does the L/D motor turn in reverse? Check the L/D motor and the drive IC.
Replace the lever assembly switch.Does the lever assembly switch operate?
YESNO
NODoes the arm assembly F/G operate?
YES
NODoes the opener door operate?
YES
Replace the arm assembly F/L
Replace the opener door.
2. Front Loading MechanismA.
B.
MECHANISM TROUBLESHOOTING GUIDE
4-27
No safe adherence of tape is done.
Is cassette insert done?
Does the opener lid operate?
Check the assembly status of theopener door.
Replace the opener lid.
Replace the arm assembly F/L.
Check power supply of the L/D motor.
Check the assembly status of theholder assembly cassette.
Replace the gear rack F/L.
Does the gear rack F/L operate?
Does the opener door operate?
Does the arm assembly F/L operate?
Does the L/D motor operate?
Does the holder assembly cassette movesame as the arm assembly F/L?
Replace the front loading mechanismassembly.
YES
YES
YES
YES
NO
NO
NO
YES NO
YES NO
YES NO
C.
4-28
EXPLODED VIEWS
100
A21
A23
A24
032
109
A22
054A
054
115
116
110
112113
114
103105
102
106
107
1. Front Loading Mechanism Section
EXPLODED VIEWS
4-29
008
011
031
079
017
032
024406
031
021028
029
026
A03
027
022
003
004
006
007
014
015
009409
013
016
012
OPTIONAL PARTA
01
405
2. Moving Mechanism Section (1)
EXPLODED VIEWS
4-30
052517
061
056
518052A
055
410
032
077
076
078
060
051
064
A11
A12
067066
065
068
069
070
023
080
058
3. Moving Mechanism Section (2)
DECK MECHANISM PARTSLOCATIONS
• Top View..................................................5-1• Top View(without Tray Disc) .................5-1• Bottom View ...........................................5-1
DECK MECHANISMDISASSEMBLY
1. Holder Clamp....................................5-2
1-1. Clamp Assembly Disc.......................5-21-1-1. Plate Clamp ..................................5-21-1-2. Magnet Clamp ..............................5-21-1-3. Clamp Upper.................................5-2
2. Tray Disc ...........................................5-2
3. Base Assembly Sled ........................5-3
3-1. Gear Assembly Feed ........................5-33-2. Gear Assembly Middle......................5-33-3. Gear Assembly Rack ........................5-3
4. Rubber Rear......................................5-3
5. Frame Assembly Up/Down..............5-46. Belt Loading......................................5-47. Gear Pulley .......................................5-48. Gear Loading ....................................5-49. Guide Up/Down.................................5-410. PWB Assembly Loading................5-411. Base Main........................................5-4
EXPLODED VIEW
1. Deck Mechanism Exploded View....5-5
CONTENTS
SECTION 5 MECHANISM OF DVD PART
5-1
DECK MECHANISM PARTS LOCATION
Starting No.
1
1, 2
1, 2, 3
1, 2, 3, 4
1
1, 6
1, 2, 6
1, 2, 6, 8
1, 2, 6, 8,
9
1, 2, 7
1, 2, 7
1, 2
1, 2 ,13
1, 2, 13, 14
1, 2, 7, 12, 13, 14
1, 2, 13
1, 2, 7, 12, 13,
14, 15, 16, 17
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Holder
Clamp
Clamp Assembly
Disc
Plate Clamp
Magnet Clamp
Clamp Upper
Tray Disc
Base Assembly Sled
Gear Assembly
Feed
Gear
Middle
Gear Assembly
Rack
Rubber Rear
Frame Assembly
Up/Down
Belt Loading
Gear Pulley
Gear Loading
Guide Up/Down
PWB Assembly
Loading
Base Main
2 Screws,
2 Locking Tabs
4 Screws,
1 Connector
1 Locking Tabs
1 Screw
1 Screw
1 Locking Tab
1 Locking Tab
1 Locking Tab
1 Hook
2Screw
2 Locking Tabs
5-1
5-1
5-1
5-1
5-1
5-2
5-3
5-3
5-3
5-3
5-3
5-4
5-4
5-4
5-4
5-4
5-4
5-4
Bottom
Bottom
ProcedureParts Fixing Type
Fig-ure
Disassembly
Note
When reassembling, perform the procedure inreverse order.
The “Bottom” on Disassembly column of aboveTable indicates the part should be disassembledat the Bottom side.
• Top View (Without Tray)
• Bottom View
• Top View (With Tray)
5-2
DECK MECHANISM DISASSEMBLY
1.Holder Clamp (Fig. 5-1)1) Release 2 Screws(S1).2) Unhook 2 Locking Tabs(L1).3) Lift up the Holder Clamp and then separate it from the
Base Main.1-1. Clamp Assembly Disc1) Place the Clamp Assembly Disc as Fig. (A)2) Lift up the Clamp Assembly Disc in direction of
arrow(A).3) Separate the Clamp Assembly Disc from the Holder
Clamp.1-1-1. Plate Clamp1) Turn the Plate Clamp to counterclockwise direction and
then lift up the Plate Clamp.1-1-2. Magnet Clamp1-1-3.Clamp Upper
2. Tray Disc (Fig. 5-2)1) Insert and push a Driver in the emergency eject
hole(A) at the right side, or put the Driver on theLever(B) of the Gear Emergency and pull the Lever(B) in direction of arrow so that the Tray Disc is ejectedabout 15~20mm.
2) Pull the Tray Disc until it is separated from the BaseMain completely.
Fig. 5-1 Fig. 5-2
5-3
DECK MECHANISM DISASSEMBLY
3.Base Assembly Sled (Fig. 5-3)1) Release 4 Screw(S2).2) Disconnect the FFC Connector(C1)
3-1. Gear Assembly Feed3-2. Gear Middle
3-3. Gear Assembly Rack1) Release the Scerw(S3)
4. Rubber Rear (Fig. 5-3)
Fig. 5-3
5-4
DECK MECHANISM DISASSEMBLY
5. Frame Assembly Up/Down (Fig. 5-4)
Put the Base Main face down(Bottom Side)1) Release the Screw(S4)2) Unlock the Locking Tab(L3) in direction of arrow and
then lift up the Frame Assembly Up/Down to separateit from the Base Main.
• When reassembling move the Guide Up/Down in directionof arrow(C) until it is positioned as Fig.(C).
• When reassembling insert (A) portion of the FrameAssembly Up/Down in the (B) portion of the GuideUp/Down as Fig.(B)
6. Belt Loading(Fig. 5-4)
Put the Base Main on original position(Top Side)7. Gear pulley (Fig. 5-4)1) Unlock the Locking Tab(L4) in direction of arrow(B) and
then separate the Gear Pulley from the Base Main.
8. Gear Loading (Fig. 5-4)9. Guide Up/Down (Fig. 5-4)
1) Move the Guide Up/Down in direction of arrow(A) asFig.(A)
2) Push the Locking Tab(L5) down and then lift up theGuide Up/Down to separate it from the Base Main.
When reassembling place the Guide Up/Down as Fig.(C)and move it in direction arrow(B) until it is locked by theLocking Tab(L5). And confirm the Guide Up/Down as Fig.(A)10. PWB Assembly Loading (Fig. 5-4)
Put the Base Main face down(Bottom Side)1) Release 2 Screws(S5)2) Unlock the Loading Motor (C2) from the Hook (H1) on
the Base Main.3) Unlock 2 Locking Tabs(L6) and separate the PWB
Assembly Loading from the Base Main.11. Base Main(Fig. 5-4)
Note
Note
Note
Note
Note
Fig. 5-4
EXPLODED VIEWS1. Deck Mechanism Exploded View
429
429
026
010018013014
017
015
015A
011
430
431
011A
012
004
001002
003
A01
A02
020
430
430
430430
012
021433
433
012
012
028
022
432024
A03
A26
025
030
015B
015C
435
029031
431
431
431
024A
024A
024B
5-5 5-6
