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SERVICE MANUAL Colour Television Product Code: 1 113 378 15 Original Version Chassis Series: LC1-B F5TT FILE NO. Model No. C20LB87B Service Ref. No. C20LB87B-00 (Argentina) Give complete “SERVICE REF. NO.” for parts order or servicing. It is shown on the rating plate at the cabinet back of the unit. This T.V. receiver will not work properly in foreign countries where the television trans- mission system and power source differ from the design specifications. Refer to the specifi- cation table. VIDEO MODE AUDIO MODE POWER 0 7 1 4 8 5 2 3 6 9 CH+VOL RECALL MENU IMAGE SLEEP DISPLAY MUTE FXMR VOL- Specifications Power Source . . . . . . . . . AC220V, 50Hz / 60Hz Receiving System . . . . . . PAL (M/M, N/N), NTSC (M/M) Channel Coverage Antenna mode VHF: CH02-CH13, UHF: CH14-CH69 CATV mode VHF band: CH01-CH13, Mid band: CH14-CH22 Super band: CH23-CH36, Hyper band: CH37-CH64 Ultra band: CH65-CH94 and CH100-CH125 Low mid band: CH95-CH99 Video IF . . . . . . . . . . . . . 45.75MHz Aerial Input Impedance . . 75Ext. Terminals Video inputs: Phono jack 2(1Vp - p, 75Ω) Audio inputs: Phono jack 2 (436mVrms, more than 40KΩ) Speaker . . . . . . . . . . . . . 5cm 9cm 2 Sound Output (Music) . . . 2.0W Dimensions . . . . . . . . . 496(W) 464(H) 472(D)mm Weight . . . . . . . . . . . . . approx. 16.7Kg Specifications subject to change without notice. VIDEO AUDIO MENU CH - VOL +

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Page 1: SERVICE MANUAL Colour Television - Diagramas dediagramas.diagramasde.com/televisores/C20LB87B-20TC645.pdfSERVICE MANUAL Colour Television Product Code: 1 113 378 15 Original Version

SERVICE MANUAL Colour Television

Product Code: 1 113 378 15

Original Version

Chassis Series: LC1-B

F5TT

FILE NO.

Model No. C20LB87B

Service Ref. No. C20LB87B-00

(Argentina)

Give complete “SERVICE REF. NO.” for partsorder or servicing. It is shown on the ratingplate at the cabinet back of the unit.

This T.V. receiver will not work properly in foreign countries where the television trans-mission system and power source differ fromthe design specifications. Refer to the specifi-cation table.

VIDEOMODE

AUDIOMODEPOWER

0

7

1

4

8

5

2 3

6

9

CH

+VOL

RECALL

MENU IMAGE

SLEEP

DISPLAYMUTE

FXMR

VOL-

SpecificationsPower Source . . . . . . . . . AC220V, 50Hz / 60HzReceiving System . . . . . . PAL (M/M, N/N), NTSC (M/M)Channel Coverage

Antenna mode VHF: CH02-CH13, UHF: CH14-CH69CATV mode VHF band: CH01-CH13, Mid band: CH14-CH22

Super band: CH23-CH36, Hyper band: CH37-CH64Ultra band: CH65-CH94 and CH100-CH125Low mid band: CH95-CH99

Video IF . . . . . . . . . . . . . 45.75MHz Aerial Input Impedance . . 75ΩExt. Terminals

Video inputs: Phono jack 2(1Vp - p, 75Ω)Audio inputs: Phono jack 2 (436mVrms, more than 40KΩ)

Speaker . . . . . . . . . . . . . 5cm 9cm 2Sound Output (Music) . . . 2.0WDimensions . . . . . . . . . 496(W) 464(H) 472(D)mmWeight . . . . . . . . . . . . . approx. 16.7Kg

Specifications subject to change without notice.

VIDEO AUDIO MENU CH - VOL +

Page 2: SERVICE MANUAL Colour Television - Diagramas dediagramas.diagramasde.com/televisores/C20LB87B-20TC645.pdfSERVICE MANUAL Colour Television Product Code: 1 113 378 15 Original Version

Contents

-2-

Safety Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Chassis Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4IC Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6Protection Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Service Adjustments with replacing Memory IC (IC802) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-12Service Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Purity and Convergence Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Cabinet Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Chassis Electrical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-21

Safety Notice

SAFETY PRECAUTIONS

1: An isolation transformer should be connected in thepower line between the receiver and the AC linewhen a service is performed on the primary of theconverter transformer of the set.

2: Comply with all caution and safety-related notes pro-vided on the cabinet back, inside the cabinet, on thechassis or the picture tube.

3: When replacing a chassis in the cabinet, always becertain that all the protective devices are installedproperly, such as, control knobs, adjustment coversor shields, barriers, isolation resistor-capacitor net-works etc.. Before returning any television to thecustomer, the service technician must be sure thatit is completely safe to operate without danger ofelectrical shock.

X-RADIATION PRECAUTION

The primary source of X-RADIATION in television receiver is the picture tube. The picture tube is specially con-structed to limit X-RADIATION emissions. For continued X-RADIATION protection, the replacement tube must bethe same type as the original including suffix letter. Excessive high voltage may produce potentially hazardous X- RADIATION. To avoid such hazards, the high voltage must be maintained within specified limit. Refer to this ser-vice manual, high voltage adjustment for specific high voltage limit. If high voltage exceeds specified limits, takenecessary corrective action. Carefully follow the instructions for + B1 volt power supply adjustment, and high volt-age check to maintain the high voltage within the specified limits.

PRODUCT SAFETY NOTICE

Product safety should be considered when a component replacement is made in any area of a receiver.Components indicated by mark in the parts list and the schematic diagram designate components in whichsafety can be of special significance. It is particularly recommended that only parts designated on the parts listin this manual be used for component replacement designated by mark . No deviations from resistancewattage or voltage ratings may be made for replacement items designated by mark .

Page 3: SERVICE MANUAL Colour Television - Diagramas dediagramas.diagramasde.com/televisores/C20LB87B-20TC645.pdfSERVICE MANUAL Colour Television Product Code: 1 113 378 15 Original Version

Chassis Block Diagrams

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Page 4: SERVICE MANUAL Colour Television - Diagramas dediagramas.diagramasde.com/televisores/C20LB87B-20TC645.pdfSERVICE MANUAL Colour Television Product Code: 1 113 378 15 Original Version

Chassis Block Diagrams

-4-

SYSTEM CONTROL

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Page 5: SERVICE MANUAL Colour Television - Diagramas dediagramas.diagramasde.com/televisores/C20LB87B-20TC645.pdfSERVICE MANUAL Colour Television Product Code: 1 113 378 15 Original Version

IC Block Diagrams

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IC201 < IF/Video/Chroma/Def. > QXXAVB488

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Page 6: SERVICE MANUAL Colour Television - Diagramas dediagramas.diagramasde.com/televisores/C20LB87B-20TC645.pdfSERVICE MANUAL Colour Television Product Code: 1 113 378 15 Original Version

IC Block Diagrams

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Protection CircuitThis TV set has a built-in power supply protection circuit.It is provided to protect the TV set in case of a power supply circuit malfunctions. When something abnormalityoccurs during TV reception, the TV set goes to the stand-by mode.

When an abnormality occurs during TV reception, it causes pin 27 of the CPU to go continually Low(less than0.75V) for about one second. The CPU detects that this has occurred and outputs the signal from pin 31 toswitch off the power supply lines.

Releasing the protective circuit and restoring power supply

To release the protective circuit and restore power supply, turn the power to the TV set OFF and then ON againvia either the main power switch or the ON-OFF button on the remote control. This will work only if the powersupply trouble was temporary. If there is permanent trouble such as a damaged circuit, power cannot berestored and the circuit will have to be repaired.

LA7840

Page 7: SERVICE MANUAL Colour Television - Diagramas dediagramas.diagramasde.com/televisores/C20LB87B-20TC645.pdfSERVICE MANUAL Colour Television Product Code: 1 113 378 15 Original Version

-7-

Service Adjustments with Replacing Memory IC(IC802)

MENU CH - VOL +

0

7 8 9RECALL SLEEP

Note: The CPU (IC801) and memory IC (IC802) store the service adjustments data and controls data for each circuit.When the Memory IC(IC802) is replaced, some of the service adjustments should be readjusted to obtain thebest performance. The necessary service adjustments are carried out by using the RC handset. Please setup the TV set with following steps [1] to [3].

[1] Initializing Procedure1. Put a new memory IC.2. Turn on the TV set3. Press and hold the MENU button on the TV set, then press 0 button on the remote control transmitter.

The following picture appears on the screen.

This completes the initialization of memory IC.

02

Following shows the initialized contents of memory data by this procedure.

1. TV/AV mode : TV mode2. Antenna or cable setting : Antenna3. Colour system : AUTO4. Channel Memory : Clear5. Receiving Channel : Ch026. Sound Volume : 11/63 steps7. Color : 30/63 steps8. Contrast : 63/63 steps9. Brightness : 32/63 steps10. Sharpness : 31/63 steps11. Tint : 31/63 steps12. Language : Spanish13. Password : Clear14. Channel Block : Clear15. Sleep Timer : Clear16. Picture Mode : MANUAL17. Video status (Picture mode data)

Item NORMAL STRONG SOFT MANUALColour 28 34 22 28Contrast 63 63 63 63 Brightness 35 15 40 35Sharpness 31 31 31 31

Page 8: SERVICE MANUAL Colour Television - Diagramas dediagramas.diagramasde.com/televisores/C20LB87B-20TC645.pdfSERVICE MANUAL Colour Television Product Code: 1 113 378 15 Original Version

-8-

Service Adjustments with Replacing Memory IC(IC802)

[2] Service Adjustments-1

Following table shows the initial values which have been stored in the CPU ROM, and items for the service adjustments.

No. Item Initial value Range Description

01 H-P 08 00~15 Horizontal centre adjustment02 V-P 04 00~07 Vertical centre adjustment03 V-S 64 00~127 Vertical size adjustment04 OSD 20 01~63 OSD position adjustment05 AGC 64 00~127 RF AGC adjustment06 VCO 128 00~255 VCO (AFT) adjustment07 SIF 00 00 SIF VCO adjustment08 SELF 00 00~15 SELF-adjusting 09 DLT 02 00~03 DL-time adjustment10 DL F 00 00, 01 DL-fine adjustment11 B-ST 00 00, 01 Black stretch on/off setting12 ABCL 01 00, 01 ABCL adjustment13 AB-G 00 00, 01 ABCL gain adjustment14 TRAP 03 00~03 Trap frequency adjustment15 WBK 00 00, 01 White back setting16 BBK 00 00, 01 Blue back setting17 AFCG 02 00~02 AFC gain adjustment18 RBI 00 00~255 Red bias adjustment19 GBI 00 00~255 Green bias adjustment20 BBI 00 00~255 Blue bias adjustment21 RD 64 00~127 Red drive adjustment22 BD 64 00~127 Blue drive adjustment23 DRV -- -- White balance adjustment24 -- -- -- Y-cut setting25 CCD 20 1~31 Caption H-Position Adjustment

Service mode adjustments table in CPU ROM

Grey scale adjustment

Notes:The initial value that the CPU writes down the CPU ROM data to the memory when replaced the memory IC. TV setmay not operate correctly with this initial value. It is required to set up the fine adjustment for service adjustmentsdescribed below.

Adjustments Service Mode No. & ItemHorizontal centre adjustment Item 01, H-PVertical centre adjustment Item 02, V-PVertical size adjustment Item 03, V-SOSD position adjustment Item 04, OSDRF AGC adjustment Item 05, AGCAFT adjustment Item 06, VCOGrey scale adjustment Item 18-24

Further adjustment please refer to pages 10 and 11.

Page 9: SERVICE MANUAL Colour Television - Diagramas dediagramas.diagramasde.com/televisores/C20LB87B-20TC645.pdfSERVICE MANUAL Colour Television Product Code: 1 113 378 15 Original Version

-9-

00100100 23 DRV R 64 B 64

Service Adjustments with Replacing Memory IC(IC802)[Entering to Service Mode]

1. Press and hold the MENU button on the TV set and press the 2 button on the remote control handset. Followingsetting items appears on the screen.

Display for [H-P] Horizontal centre adjustment

00100100 01 H-P 08

Read Status

Item No. Item Data value

Data value for Red

Display for [DRV] White balance adjustment

Read Status

Item No. Item

Data value for Blue

To return to normal TV mode, press the MENU button on the TV set or remote control handset.

2. Select item by pressing the CHANNEL DOWN (Item No. UP) or CHANNEL UP (Item No. DOWN) button on theremote control handset.

3. Adjust data value by pressing the VOLUME + or VOLUME - button on the remote control handset.

Example

1 2 3

CH

DISPLAYMUTE

CH

+VOL

MENU IMAGE

VOL-

01 02 03 04 05......27

27 26 25 24 23......01

CH

+VOL

DISPLAYMUTE

VOL-

MENU CH - VOL +

Page 10: SERVICE MANUAL Colour Television - Diagramas dediagramas.diagramasde.com/televisores/C20LB87B-20TC645.pdfSERVICE MANUAL Colour Television Product Code: 1 113 378 15 Original Version

-10-

Service Adjustments with Replacing Memory IC(IC802)

(1) Receive the monochrome circular pattern.(2) Set the brightness and contrast to normal.(3) Select [H-P] in the service mode.(4) Change value to be optimum horizontal centre position.(5) Exit from the service mode.

(1) Receive the monochrome circular pattern.(2) Set the brightness and contrast to maximum.(3) Select [V-P] in the service mode.(4) Change value to be optimum vertical centre position.(5) Exit from the service mode.

(1) Receive the monochrome circular pattern.(2) Set the brightness and contrast to maximum.(3) Select [V-S] in the service mode.(4) Change value to be optimum vertical size.(5) Exit from the service mode.

(1) Receive the monochrome circular pattern.(2) Set the brightness and contrast to normal.(3) Select [OSD] in the service mode.(4) Change value to be proper OSD position.(5) Exit from the service mode.

NOTE: Do not attempt this adjustment with weak signal.(1) Tune the receiver to most clearest (or strongest) VHF

station in your area. Set the brightness and contrastcontrols to maximum. Set the colour control to mini-mum.

(2) Select [AGC] in the service mode.(3) Change value until the snow noise just disappears.(4) Exit from the service mode.

(1) Connect DC meter to TP-D and the ground.(2) Tune the receiver to the clearest station.(3) Disconnect RF input. (Disconnect antenna plug from

the antenna socket.)(4) Select same channel. (If you have selected channel 03

in step 2, press “0” button next “3” button on the remotecontrol to select channel 03.)

(5) Connect antenna plug to the antenna socket.(6) Select [VCO] in the service mode.(7) Change value until the voltage (on TP-D) to be

4.5±0.2V at OK point.

(8) Exit from the service mode.

(1) Tune receiver to a CAPTION channel.(2) Check that CAPTION position is in the horizontal

center of TV screen. If CAPTION center is too right or left, perform steps 3-6. (See Figure below.)

(3) Select [CCD] in the service mode.(4) Adjust the data with + or - key for proper horizontal

center.(5) Exit from the service mode.

±CAPTION H-POSITION ADJUSTMENT

NG OK

4.5V ±0.2V

0 255VCO DATA

TP

-D V

OLT

AG

E

±Item 06 [VCO] AFT

Item 05 [AGC] AGC

Item 04 [OSD] OSD POSITION

Item 03 [V-S] VERTICAL SIZE

Item 02 [V-P] VERTICAL CENTRE

Item 01 [H-P] HORIZONTAL CENTRE

Horizontal centre

Vertical centre

Vertical size

IC001AUDIO AMP.IC802

MEMORY

IC201

MAIN BOARD

TP-D (J146)

XXX XXXX XXXX XXX

Caption H-Position Adjustment

A B A=B

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-11-

VIDEOMODE

AUDIOMODEPOWER

0

7

1

4

8

5

2 3

6

9

CH

+VOL

RECALL

MENU IMAGE

SLEEP

DISPLAYMUTE

VOL-

(1) Receive the monochrome circular pattern.(2) Set the brightness and colour to normal, contrast to maximum.(3) Enter to the service mode.(4) Set each value of Item-18 RBI, 19 GBI, 20 BBI mode to 00. Set each value of Item-21 RD, 22 BD mode to 64.(5) Select Item-24 mode to be one horizontal scanning line and turn the screen volume on the FBT to obtain just visible

one coloured line.(6) Press the 1 (Red Bias +), 4 (Red Bias -), 2 (Green Bias +), 5 (Green Bias -), 3 (Blue Bias +) or 6 (Blue Bias -)

button to adjust the brightness of each colour until a dim white line produced. Please see the control button alloca-tions in this mode.

(7) Select Item-23 DRV mode to enter the white balance adjusting mode.(8) Press the 7 (Red Drive +), CHANNEL RECALL (Red Drive -), 8 (Blue Drive +) or 0 (Blue Drive -) button

alternately to produce normal black and white picture.(9) Exit from the service mode.(10) Check for proper grey scale tracking at all brightness levels.

NOTE: If the grey scale adjustment is made after picture tube replacement, check the high voltage.

Items 18-24 GREY SCALE

Service Adjustments with Replacing Memory IC(IC802)

Red Bias -

Red Bias +

Green Bias -

Blue Bias +

Red Drive +

Blue Drive -

Blue Drive +

Green Bias +

Blue Bias -

Press the MENUbutton to exit fromservice mode

Red Drive -

T401F.B.T.

MAIN BOARD

SCREEN VR(Under side)

F.B.T.

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-12-

Service Adjustments with Replacing Memory IC(IC802)

[3] Service Adjustment-2

1. Press and hold the MENU button on the TV set and press the 4 or MENU button on the remote control handset toenter to the service mode.

FINE TUNING - +

To return to normal TV mode, press the MENU button on the TV set or remote control handset. (Or will automaticallyreturn to normal TV mode after 5 seconds.)

2. Press and hold the VOLUME + or VOLUME - button on the remote control handset or TV set to make fine tuningadjustment. Press and hold the VOLUME + button for higher frequency tuning, and press and hold the VOLUME - or lower frequency tuning.

0

+VOL

RECALL

MENU IMAGE

SLEEP

CH

+VOL

DISPLAYMUTE

VOL-

This adjustment is used to do a fine tuning of the channels with poor reception after they have been stored by the automatic tuning.This function is available for one channel only and the fine-tuned channel is memorized into IC802(EEPROM).

FINE TUNING

Fine tuning service mode

Fine tuning data value will be automatically stored in memory.

MENU CH - VOL +

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-13-

Q432HORIZ. OUT B

C

E

T431H-DRIVETRANS.

Q613POWER OUT

B

C

E

T401F.B.T.

T611CONVERTER

TRANS.

Service Adjustments

MAIN BOARD

Following adjustments are not required to readjust when replacing the memory IC.

(1) Receive the monochrome circular pattern.(2) Set the brightness and contrast to maximum.(3) If the picture is too wide, or narrow, cut or short the “AJ1” on

the main unit. When AJ1 is shorted, the horizontal widthincrease. When AJ1 is cut, the horizontal width decrease.

Important note: When AJ1 is cut, in order to prevent a spark,leave the opening between cutting portions 5mm or more.

HORIZ. WIDTH AND HIGH VOLTAGE CHECK

(1) Receive the monochrome circular pattern.(2) Set the brightness to normal and contrast to maximum.(3) Adjust the focus control on the F.B.T. for the best focus on the

screen centre.

FOCUS ADJUSTMENT

F.B.T.

(4) Connect a high voltage probe to anode lead of the picturetube.

(5) The high voltage must be 25KV ± 1KV and less than 27.5KVat 0 beam current (Brightness and contrast minimum setting).

Note: If the picture tube is replaced, check the high voltage. Thehoriz. width adjustment affects the high voltage.Therefore, re-check the high voltage.

more than 5mmAJ1

+B POWER SUPPLY ADJUSTMENT

VR631 TP-B

HORIZONTAL WIDTH ADJUSTMENT

AJ1

FOCUS ADJUSTMENT

FOCUS VR

(Upper side)

(1) Connect DC meter to “TP-B” (R638) and the ground. Set the+B adjustment control (VR631) to mid-range.

(2) Set the brightness to normal and contrast to maximum. Tunethe receiver to an active channel and synchronized picture.

(3) Adjust +B adjustment control (VR631) for 130 ± 1,0 volt DC.

+B POWER SUPPLY ADJUSTMENT

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-14-

Purity and Convergence AdjustmentCAUTION: The Convergence and Purity adjustments have been made at the factory. Readjustmentshould be made only after picture tube or deflection yoke replacement, following the steps below:

PURITY ADJUSTMENT1. Demagnetize the picture tube and receiver using an

external degaussing coil. When replacing picture tube ordeflection yoke, mount deflection yoke and purity-con-vergence magnets assembly properly, see figures 1 and4.

2. Turn Red and Blue guns off and provide only Greenraster. Rotate Screen control to fully counterclockwise.Rotate Red and Blue Bias controls fully counterclock-wise. Slowly rotate Green Bias control clockwise to pro-duce Green raster.

3. Loosen the screw holding the Deflection Yoke andremove the 3 Rubber Wedges, and slide the DeflectionYoke fully forward.

4. Rotate and spread the Tabs of the two Purity Magnetsto centre the vertical green belt in the picture screen.The Purity Magnets are also adjusted to obtain verticalcentring of the raster.

5. Slowly slide the Deflection Yoke backward until a uni-form green screen is obtained.

6. Check the purity of the red and blue screens for unifor-mity, turn off other colours to check this (use bias con-trols). Readjust the yoke position if necessary until allscreens are pure.

7. Adjust each Bias control and screen control to obtainwhite raster. Refer to Gray Scale Adjustment. If part ofthe picture screen is coloured, adjust the DeflectionYoke position forward or backward slightly.

8. Tighten the mounting screw of the Deflection Yoke.Adjust Convergence next.

CENTRE CONVERGENCE ADJUSTMENT1. Use a dot crosshatch pattern signal.2. Turn Red and Blue guns on and turn off Green gun.

Adjust the angle between the Tabs of the Four PoleMagnet 1 and 2, and superimpose the Red and Bluevertical lines in the centre area of the picture screen.Refer to figure 2.

3. Keeping the mutual angle of the Tabs of the Four PoleMagnet turn them together to superimpose the Blue andRed horizontal lines in the centre area of the picturescreen. Refer to figure 2.

4. Turn Green gun on and adjust Six Pole Magnet 3 and 4that the Green line superimposed on the Red/Blue lines.This is the same procedure used in steps 2 and 3.Refer to figure 3.

OUTER AREA CONVERGENCE ADJUSTMENTSlightly loosen the screw holding the Deflection Yoke.Adjust the Deflection Yoke to converge the detail in theouter area (left side and right side) of the picture screen byorbital movement of the front of the Yoke, then secure theDeflection Yoke in appropriate position by putting thewedges as illustrated. Tighten screw holding the DeflectionYoke.

RED

BLUE

Adjust tabs together tosuperimpose red andblue horizontal line.

Figure- 2 BLUE AND RED LINE MOVEMENT Figure- 3 BLUE/RED AND GREEN MOVEMENT

Adjust tabs together tosuperimpose red/blueand green horizontalline.

Adjust tabs angle to superimposeblue and red vertical line.

Adjust tabs angle to superimposered/blue and green vertical line.

GREEN

BLUE / RED

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-15-

F5TTCabinet Parts List

1 610 269 8923 BUTTON POWER610 252 8725 SPRING

or 610 270 5591 SPRING2 610 269 9166 DEC IND3 610 269 8930 BUTTON UNITED4 610 270 7229 CABINET FRONT5 645 040 1107 BADGE,SANYO6 610 269 6585 CABINET BACK7 610 297 1699 LABEL RATING8 645 029 2590 ASSY,REMOCON FXMR 9 610 273 0173 RC-BATTERY LID

10 645 004 3925 ANT MATCHING BOX or 645 005 0251 ANT MATCHING BOX

610 297 1651 INSTRUCTIONS MANUAL

Key No. Part No. Description Key No. Part No. Description

Note: Parts order must contain Service Ref. No., Part No., and descriptions.

VIDEO AUDIO MENU CH - VOL +

AUDIOIN

ANT.75Ω

R

L

VIDEO IN

VIDEOMODE

AUDIOMODEPOWER

0

7

1

4

8

5

2 3

6

9

CH

+VOL

RECALL

MENU IMAGE

SLEEP

DISPLAYMUTE

FXMR

VOL-

1234

5

6

7

8

9

10

Page 16: SERVICE MANUAL Colour Television - Diagramas dediagramas.diagramasde.com/televisores/C20LB87B-20TC645.pdfSERVICE MANUAL Colour Television Product Code: 1 113 378 15 Original Version

-16-

F5TT

OUT OF CIRCUIT BOARD

PICTURE TUBE Q901 414 010 4604 CRT A48EJN05X101

COIL L901 645 004 5691 COIL,DEGAUSSING

645 045 4479 COIL,DEGAUSSING 610 238 2105 DEGAUSSING COIL

MISCELLANEOUS SP901 652 000 0612 SPEAKER,16 SP902 652 000 0612 SPEAKER,16 W901 645 037 2490 CORD,POWER-2.4MK-A5102 W902 610 210 5520 GROUNDING CONNECTOR

610 261 8655 ASSY,WIRE GND CONNECTOR F

610 292 3001 ASSY,PWB,CTV F3BW1AA0B10E646B0

610 292 2981 ASSY,PWB,MAIN F3BW1AA0B10E646BA

TRANSISTOR Q111 405 015 9701 TR 2SC2814-F4-TB Q140 405 134 5905 TR 2SA1037AK-T146-R

405 147 2205 TR 2SA1037AK-S-T146 405 002 0308 TR 2SA1037K T146 R 405 002 0407 TR 2SA1037K T146 S 405 002 6706 TR 2SA1179-M6-TB 405 002 6904 TR 2SA1179-M7-TB 405 163 1503 TR 2SA1179N-M6-TB 405 163 2708 TR 2SA1179N-M7-TB

Q141 405 134 5905 TR 2SA1037AK-T146-R 405 147 2205 TR 2SA1037AK-S-T146 405 002 0308 TR 2SA1037K T146 R 405 002 0407 TR 2SA1037K T146 S 405 002 6706 TR 2SA1179-M6-TB 405 002 6904 TR 2SA1179-M7-TB 405 163 1503 TR 2SA1179N-M6-TB 405 163 2708 TR 2SA1179N-M7-TB

Q171 405 014 4509 TR 2SC2412K T146 R 405 014 4608 TR 2SC2412K T146 S 405 015 8704 TR 2SC2812-L6-TB 405 015 8902 TR 2SC2812-L7-TB 405 163 1602 TR 2SC2812N-L6-TB0 405 163 1701 TR 2SC2812N-L7-TB0

Q212 405 014 4509 TR 2SC2412K T146 R 405 014 4608 TR 2SC2412K T146 S 405 015 8704 TR 2SC2812-L6-TB 405 015 8902 TR 2SC2812-L7-TB 405 163 1602 TR 2SC2812N-L6-TB0 405 163 1701 TR 2SC2812N-L7-TB0

Q213 405 014 4509 TR 2SC2412K T146 R 405 014 4608 TR 2SC2412K T146 S 405 015 8704 TR 2SC2812-L6-TB 405 015 8902 TR 2SC2812-L7-TB

!

!

!

Chassis Electrical Parts List

Ref. No. Part No. Description Ref. No. Part No. Description

Product safety should be considered when a component replacement is made in any area of a receiver. Components indicated by a mark in this parts list and the circuit diagram show components whose value havespecial significance to product safety. It is particularly recommended that only parts specified on the following partslist be used for components replacement pointed out by the mark.

!

Note: Parts order must contain Service Ref. No., Part No., and descriptions. The main PCB unit will be supplied without tuner andflyback transformer. They should be ordered separately.

Read description in the Capacitor and Resistor as follows:

CAPACITORCERAMIC 100P K 50V

Rated Voltage

Tolerance Symbols:Less than 10pFA : Not specified B : ±0.1pF C : ±0.25pFD : ±0.5pF F : ±1PF G : ±2pFR : ±0.25-0pF S : ±0-0.25pF E : +0-1pFMore than 10pFA : Not specified B : ±0.1% C : ±0.25%D : ±0.5% F : ±1% G : ±2%H : ±3% J : ±5% K : ±10%L : ±15% M : ±20% N : ±30%P : +100-0% Q : +30-10% T : +50-10%U : +75-10% V : +20-10% W : +100-10%X : +40-20% Y : +150-10% Z : +80-20%

Rated value: P=pico farad, U=micro farad

Material:CERAMIC........... CeramicMT-PAPER......... Metallized PaperPOLYESTER...... PolyesterMT-POLYEST.....Metallized PolyesterPOLYPRO.......... PolypropyleneMT-POLYPRO....Metallized PolypropyleneCOMPO FILM.....Composite filmMT-COMPO........Metallized CompositeSTYRENE...........StyreneTA-SOLID........... Tantalum SolidAL-SOLID........... Aluminium SolidELECT................ElectrolyticNP-ELECT..........Non-polarised ElectrolyticOS-SOLID.......... Aluminium Solid with Organic Semiconductive ElectrolyticDL-ELECT.......... Double Layered Electrolytic

RESISTORCARBON 4.7K J A 1/4W

Rated Wattage

Performance Symbols:A: General B: Non flammable Z: Low noiseOther: Temperature coefficient

Tolerance Symbols:A: ±0.05% B: ±0.1% C: ±0.25% D: ±0.5%F: ±1% G: ±2% J: ±5% K: ±10%M: ±20% P: +5-15%

Rated value, ohms:K: 1,000, M: 1,000,000

Material:CARBON........... CarbonMT-FILM............ Metal FilmOXIDE-MT......... Oxide Metal FilmSOLID................ CompositionMT-GLAZE......... Metal GlazeWIRE WOUND...Wire WoundCERAMIC RES.. CeramicFUSIBLE RES....Fusible

NOTES:

Page 17: SERVICE MANUAL Colour Television - Diagramas dediagramas.diagramasde.com/televisores/C20LB87B-20TC645.pdfSERVICE MANUAL Colour Television Product Code: 1 113 378 15 Original Version

405 163 1602 TR 2SC2812N-L6-TB0 405 163 1701 TR 2SC2812N-L7-TB0

Q261 405 134 5905 TR 2SA1037AK-T146-R 405 147 2205 TR 2SA1037AK-S-T146 405 002 0308 TR 2SA1037K T146 R 405 002 0407 TR 2SA1037K T146 S 405 002 6706 TR 2SA1179-M6-TB 405 002 6904 TR 2SA1179-M7-TB 405 163 1503 TR 2SA1179N-M6-TB 405 163 2708 TR 2SA1179N-M7-TB

Q431 405 018 0507 TR 2SC3332-R 405 018 0606 TR 2SC3332-S

Q432 405 157 1304 TR 2SD2634-YB Q576 405 014 4509 TR 2SC2412K T146 R

405 014 4608 TR 2SC2412K T146 S 405 015 8704 TR 2SC2812-L6-TB 405 015 8902 TR 2SC2812-L7-TB 405 163 1602 TR 2SC2812N-L6-TB0 405 163 1701 TR 2SC2812N-L7-TB0

Q611 406 000 6804 TR 2SA1015-GR(SAN) 405 001 7407 TR 2SA1015-O(SAN) 405 001 7605 TR 2SA1015-Y(SAN) 405 004 3109 TR 2SA564A-Q(CU) 405 004 3208 TR 2SA564A-R(CU) 405 151 3304 TR 2SA608NF-NPA 405 006 1707 TR 2SA933S-Q 405 006 1806 TR 2SA933S-R

Q612 405 058 0208 TR 2SC3807-R-CTV-YA Q613 405 022 8506 TR 2SD1710-CTV-YB Q631 405 014 4509 TR 2SC2412K T146 R

405 014 4608 TR 2SC2412K T146 S 405 015 8704 TR 2SC2812-L6-TB 405 015 8902 TR 2SC2812-L7-TB 405 163 1602 TR 2SC2812N-L6-TB0 405 163 1701 TR 2SC2812N-L7-TB0

Q661 405 059 9903 TR 2SD1913-R-RA 405 060 0005 TR 2SD1913-S-RA

Q681 405 014 4509 TR 2SC2412K T146 R 405 014 4608 TR 2SC2412K T146 S 405 015 8704 TR 2SC2812-L6-TB 405 015 8902 TR 2SC2812-L7-TB 405 163 1602 TR 2SC2812N-L6-TB0 405 163 1701 TR 2SC2812N-L7-TB0

Q683 405 089 0000 TR 2SA1707-S 405 089 0109 TR 2SA1707-T 405 009 6907 TR 2SB985-S 405 009 7003 TR 2SB985-T

Q684 405 014 4509 TR 2SC2412K T146 R 405 014 4608 TR 2SC2412K T146 S 405 015 8704 TR 2SC2812-L6-TB 405 015 8902 TR 2SC2812-L7-TB 405 163 1602 TR 2SC2812N-L6-TB0 405 163 1701 TR 2SC2812N-L7-TB0

Q685 405 014 4509 TR 2SC2412K T146 R 405 014 4608 TR 2SC2412K T146 S 405 015 8704 TR 2SC2812-L6-TB 405 015 8902 TR 2SC2812-L7-TB 405 163 1602 TR 2SC2812N-L6-TB0 405 163 1701 TR 2SC2812N-L7-TB0

Q686 405 134 5905 TR 2SA1037AK-T146-R 405 147 2205 TR 2SA1037AK-S-T146 405 002 0308 TR 2SA1037K T146 R 405 002 0407 TR 2SA1037K T146 S 405 002 6706 TR 2SA1179-M6-TB 405 002 6904 TR 2SA1179-M7-TB 405 163 1503 TR 2SA1179N-M6-TB 405 163 2708 TR 2SA1179N-M7-TB

Q861 405 134 5905 TR 2SA1037AK-T146-R 405 147 2205 TR 2SA1037AK-S-T146 405 002 0308 TR 2SA1037K T146 R 405 002 0407 TR 2SA1037K T146 S 405 002 6706 TR 2SA1179-M6-TB 405 002 6904 TR 2SA1179-M7-TB 405 163 1503 TR 2SA1179N-M6-TB 405 163 2708 TR 2SA1179N-M7-TB

Q871 405 014 4509 TR 2SC2412K T146 R 405 014 4608 TR 2SC2412K T146 S 405 015 8704 TR 2SC2812-L6-TB 405 015 8902 TR 2SC2812-L7-TB 405 163 1602 TR 2SC2812N-L6-TB0 405 163 1701 TR 2SC2812N-L7-TB0

Q881 405 014 4509 TR 2SC2412K T146 R 405 014 4608 TR 2SC2412K T146 S 405 015 8704 TR 2SC2812-L6-TB 405 015 8902 TR 2SC2812-L7-TB 405 163 1602 TR 2SC2812N-L6-TB0 405 163 1701 TR 2SC2812N-L7-TB0

Q886 405 014 4509 TR 2SC2412K T146 R 405 014 4608 TR 2SC2412K T146 S 405 015 8704 TR 2SC2812-L6-TB 405 015 8902 TR 2SC2812-L7-TB 405 163 1602 TR 2SC2812N-L6-TB0 405 163 1701 TR 2SC2812N-L7-TB0

INTEGRATED CIRCUIT IC001 409 365 3006 IC LA4285 IC191 409 241 5407 IC BA178M05T

409 172 1509 IC MC78M05CT 409 320 5700 IC UPC78M05AHF

IC201 410 342 8907 IC QXXAVB488—-M 410 410 1205 IC QXXAVB889—-M

IC501 409 340 1805 IC LA7840 IC651 409 241 5407 IC BA178M05T

409 124 5302 IC L78M05T 409 172 1509 IC MC78M05CT 409 320 5700 IC UPC78M05AHF

IC801 410 360 3304 IC LC863428V-5P71-TLM IC802 409 470 3304 IC KS24C021C

409 497 0706 IC S524C20D21-DCB0 409 333 3700 IC 24LC02B/P

CAPACITOR C001 403 049 0008 ELECT 1U M 50V C002 403 157 6701 CERAMIC 560P K 50V C005 403 043 9106 ELECT 47U M 16V C006 403 042 2405 ELECT 100U M 16V C007 403 045 9807 ELECT 2200U M 25V C008 403 164 0204 CERAMIC 0.1U Z 25V C009 403 281 5205 CERAMIC 0.22U Z 16V C010 403 045 1504 ELECT 1000U M 25V C015 401 150 6001 MT-GLAZE 0.000 ZA 1/10W C101 403 044 1703 ELECT 470U M 16V C102 403 038 8602 ELECT 33U M 6.3V C103 403 051 0607 ELECT 4.7U M 50V C106 403 051 0607 ELECT 4.7U M 50V C111 403 149 9208 CERAMIC 0.01U Z 50V C112 403 149 9208 CERAMIC 0.01U Z 50V C113 403 149 9208 CERAMIC 0.01U Z 50V C132 403 149 9208 CERAMIC 0.01U Z 50V C136 403 043 3906 ELECT 33U M 16V C137 403 149 9208 CERAMIC 0.01U Z 50V C138 403 048 1907 ELECT 0.22U M 50V C142 403 042 7707 ELECT 22U M 16V C151 403 157 2901 CERAMIC 47P J 50V

-17-

F5TT

Ref. No. Part No. Description Ref. No. Part No. Description

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-18-

F5TT

C152 403 157 2901 CERAMIC 47P J 50V C171 403 048 1907 ELECT 0.22U M 50V C172 403 049 0008 ELECT 1U M 50V C173 403 155 2200 CERAMIC 3300P K 50V C177 403 048 4205 ELECT 0.33U M 50V C191 403 041 2109 ELECT 47U M 10V C201 403 043 9106 ELECT 47U M 16V C202 403 149 9208 CERAMIC 0.01U Z 50V C206 403 218 3106 ELECT 1000U M 16V C207 403 149 9208 CERAMIC 0.01U Z 50V C211 401 150 6001 MT-GLAZE 0.000 ZA 1/10W C212 401 150 6001 MT-GLAZE 0.000 ZA 1/10W C216 403 049 0008 ELECT 1U M 50V C221 403 164 0204 CERAMIC 0.1U Z 25V C222 403 164 0204 CERAMIC 0.1U Z 25V C223 403 164 0204 CERAMIC 0.1U Z 25V C241 403 155 9704 NP-ELECT 0.1U M 50V C243 403 155 9704 NP-ELECT 0.1U M 50V C246 403 049 0008 ELECT 1U M 50V C247 403 215 2409 CERAMIC 0.015U K 50V C248 403 149 9208 CERAMIC 0.01U Z 50V C281 403 049 9803 ELECT 2.2U M 50V C351 403 044 1703 ELECT 470U M 16V C354 403 215 2201 CERAMIC 0.01U K 50V C355 403 048 6308 ELECT 0.47U M 50V C356 403 048 6308 ELECT 0.47U M 50V C357 403 215 2201 CERAMIC 0.01U K 50V C359 403 215 2201 CERAMIC 0.01U K 50V C361 403 260 2003 MT-COMPO 1U J 50V

403 270 2109 MT-COMPO 1U J 50V C371 403 157 6800 CERAMIC 680P K 50V C372 403 049 0008 ELECT 1U M 50V C383 403 281 5007 CERAMIC 0.033U K 25V C432 403 075 7101 CERAMIC 1000P K 500V C433 403 076 3102 CERAMIC 3900P K 500V C434 403 054 0703 ELECT 47U M 35V C435 404 077 5508 MT-POLYPRO 9600P H 1.5K C436 403 324 2604 CERAMIC 470P K 3K

403 264 4300 CERAMIC 470P K 3K C437 403 067 7805 MT-COMPO 0.47U J 50V

403 256 0808 MT-COMPO 0.47U J 50V C441 403 083 1009 POLYPRO 0.47U J 200V C445 403 049 4204 ELECT 10U M 50V C451 404 056 5307 NP-ELECT 2.2U M 100V C491 403 076 5304 CERAMIC 680P K 500V C492 403 115 0802 ELECT 22U M 100V C501 403 054 1502 ELECT 470U M 35V C502 403 053 2104 ELECT 220U M 35V C503 403 023 9607 CERAMIC 39P J 50V C504 403 149 9208 CERAMIC 0.01U Z 50V C511 403 188 1201 MT-POLYEST 0.15U K 100V

403 313 7603 MT-COMPO 0.15U J 100V C512 403 045 1504 ELECT 1000U M 25V C513 403 049 4204 ELECT 10U M 50V C576 403 041 8804 ELECT 10U M 16V C601 404 072 7705 MT-POLYEST 0.068U M 250V

404 079 6503 MT-POLYEST 0.068U M 250V 404 073 7506 MT-POLYEST 0.068U M 275V

C606 403 076 6707 CERAMIC 1000P K 1K 403 312 8205 CERAMIC 1000P K 1K

C607 404 067 4009 ELECT 100U M 400V 404 035 6004 ELECT 100U T 400V

C608 404 073 5106 CERAMIC 470P K 250V 404 073 3300 CERAMIC 470P M 250V 404 071 4507 CERAMIC 470P K 400V

C609 404 073 5106 CERAMIC 470P K 250V 404 073 3300 CERAMIC 470P M 250V

404 071 4507 CERAMIC 470P K 400V C613 403 056 8103 POLYESTER 1000P K 50V C614 403 067 5603 MT-COMPO 0.1U J 50V C615 403 058 2604 POLYESTER 0.015U J 50V

403 311 9609 POLYESTER 0.015U J 50V C616 403 247 0008 CERAMIC 1500P K 2K

403 263 6602 CERAMIC 1500P K 2K C617 403 059 6205 POLYESTER 0.022U K 50V

403 312 0506 POLYESTER 0.022U K 50V C631 403 247 5003 CERAMIC 470P K 1K

403 269 1809 CERAMIC 470P K 1K C633 403 247 5003 CERAMIC 470P K 1K

403 269 1809 CERAMIC 470P K 1K C641 404 073 9005 ELECT 220U M 160V C643 403 054 1502 ELECT 470U M 35V C644 403 045 1504 ELECT 1000U M 25V C645 403 045 1504 ELECT 1000U M 25V C651 403 040 9406 ELECT 330U M 10V C661 403 043 0202 ELECT 220U M 16V C662 403 043 6006 ELECT 330U M 16V C685 403 049 0008 ELECT 1U M 50V C801 403 155 4204 CERAMIC 15P J 50V C802 403 155 4204 CERAMIC 15P J 50V C803 403 149 9208 CERAMIC 0.01U Z 50V C804 403 224 7006 CERAMIC 0.047U Z 50V C811 403 149 9208 CERAMIC 0.01U Z 50V C812 403 041 8804 ELECT 10U M 16V C832 403 149 9208 CERAMIC 0.01U Z 50V C851 403 155 1609 CERAMIC 33P J 50V C853 403 155 1609 CERAMIC 33P J 50V C854 403 155 1609 CERAMIC 33P J 50V C855 403 155 1609 CERAMIC 33P J 50V C861 403 049 0008 ELECT 1U M 50V C878 403 060 8403 POLYESTER 0.033U K 50V

403 312 1305 POLYESTER 0.033U K 50V C891 403 113 3805 CERAMIC 1000P K 50V C892 403 049 0008 ELECT 1U M 50V C893 403 049 9803 ELECT 2.2U M 50V C894 403 281 5007 CERAMIC 0.033U K 25V C895 403 041 8804 ELECT 10U M 16V

RESISTORR001 401 150 5905 MT-GLAZE 10K JA 1/10W R002 401 150 5905 MT-GLAZE 10K JA 1/10W R005 401 256 6905 MT-GLAZE 680 JA 1/10W R006 401 162 4002 MT-GLAZE 560 JA 1/10W R009 401 150 6100 MT-GLAZE 2.2K JA 1/10W R011 401 019 6203 CARBON 4.7 JA 1/4W R1001 401 256 2709 MT-GLAZE 75 JA 1/10W R1006 401 150 6209 MT-GLAZE 1K JA 1/10W R1007 401 150 5806 MT-GLAZE 100K JA 1/10W R103 401 061 8101 OXIDE-MT 39K JA 1W R106 401 255 6500 MT-GLAZE 100 JA 1/10W R107 401 255 6500 MT-GLAZE 100 JA 1/10W R108 401 026 1307 CARBON 27K JA 1/6W R109 401 162 3005 MT-GLAZE 22K JA 1/10W R1106 401 105 0504 MT-GLAZE 1K JA 1/16W R111 401 150 6209 MT-GLAZE 1K JA 1/10W R112 401 162 4101 MT-GLAZE 5.6K JA 1/10W R113 401 255 6500 MT-GLAZE 100 JA 1/10W R114 401 162 2909 MT-GLAZE 220 JA 1/10W R116 401 256 7407 MT-GLAZE 39 JA 1/10W R132 401 025 2305 CARBON 150K JA 1/6W R133 401 256 0200 MT-GLAZE 120K JA 1/10W R134 401 256 5809 MT-GLAZE 270K JA 1/10W R140 401 162 3708 MT-GLAZE 4.7K JA 1/10W R141 401 025 7409 CARBON 220 JA 1/6W

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Page 19: SERVICE MANUAL Colour Television - Diagramas dediagramas.diagramasde.com/televisores/C20LB87B-20TC645.pdfSERVICE MANUAL Colour Television Product Code: 1 113 378 15 Original Version

R142 401 162 2909 MT-GLAZE 220 JA 1/10W R144 401 256 7506 MT-GLAZE 390 JA 1/10W R145 401 162 3609 MT-GLAZE 470 JA 1/10W R146 401 150 6001 MT-GLAZE 0.000 ZA 1/10W R147 401 150 6100 MT-GLAZE 2.2K JA 1/10W R151 401 152 3206 MT-GLAZE 330 JA 1/10W R170 401 150 5905 MT-GLAZE 10K JA 1/10W R171 401 150 6001 MT-GLAZE 0.000 ZA 1/10W R172 401 150 5905 MT-GLAZE 10K JA 1/10W R173 401 150 6001 MT-GLAZE 0.000 ZA 1/10W R174 401 255 9501 MT-GLAZE 220K JA 1/10W R1902 401 256 7209 MT-GLAZE 18K JA 1/10W R1903 401 256 7308 MT-GLAZE 6.8K JA 1/10W R1904 401 162 3708 MT-GLAZE 4.7K JA 1/10W R1905 401 256 5908 MT-GLAZE 2.7K JA 1/10W R1906 401 025 7805 CARBON 2.2K JA 1/6W R1907 401 256 6202 MT-GLAZE 270 JA 1/10W R1908 401 150 5905 MT-GLAZE 10K JA 1/10W R1911 401 162 3609 MT-GLAZE 470 JA 1/10W R1912 401 162 3609 MT-GLAZE 470 JA 1/10W R1913 401 162 3609 MT-GLAZE 470 JA 1/10W R212 401 256 5304 MT-GLAZE 56K JA 1/10W R213 401 256 5304 MT-GLAZE 56K JA 1/10W R214 401 256 3607 MT-GLAZE 15K JA 1/10W R215 401 256 3607 MT-GLAZE 15K JA 1/10W R216 401 256 6301 MT-GLAZE 47K JA 1/10W R217 401 256 1702 MT-GLAZE 33K JA 1/10W R221 401 105 0504 MT-GLAZE 1K JA 1/16W R222 401 105 0504 MT-GLAZE 1K JA 1/16W R223 401 105 0504 MT-GLAZE 1K JA 1/16W R225 401 256 7605 MT-GLAZE 3.9K JA 1/10W R231 401 150 6100 MT-GLAZE 2.2K JA 1/10W R232 401 150 6100 MT-GLAZE 2.2K JA 1/10W R233 401 150 6100 MT-GLAZE 2.2K JA 1/10W R246 401 162 3104 MT-GLAZE 3.3K JA 1/10W R248 401 256 7704 MT-GLAZE 3.9M JA 1/10W R261 401 162 3104 MT-GLAZE 3.3K JA 1/10W R262 401 025 7409 CARBON 220 JA 1/6W R263 401 025 7409 CARBON 220 JA 1/6W R271 401 024 6700 CARBON 100 JA 1/6W R272 401 255 6500 MT-GLAZE 100 JA 1/10W R281 401 162 3807 MT-GLAZE 470K JA 1/10W R351 401 063 1001 OXIDE-MT 680 JA 1W R356 401 162 3708 MT-GLAZE 4.7K JA 1/10W R357 401 256 5106 MT-GLAZE 560K JA 1/10W R361 401 150 6209 MT-GLAZE 1K JA 1/10W R364 401 162 3005 MT-GLAZE 22K JA 1/10W R372 401 162 4002 MT-GLAZE 560 JA 1/10W R373 401 256 5106 MT-GLAZE 560K JA 1/10W R380 401 162 3708 MT-GLAZE 4.7K JA 1/10W R381 401 012 7009 CARBON 10K JA 1/4W R382 401 021 3009 CARBON 5.6K JA 1/4W R383 401 025 7409 CARBON 220 JA 1/6W R384 401 150 5905 MT-GLAZE 10K JA 1/10W R385 401 024 7400 CARBON 10K JA 1/6W R430 401 150 6209 MT-GLAZE 1K JA 1/10W R432 401 150 6001 MT-GLAZE 0.000 ZA 1/10W R433 401 007 1104 CARBON 1K JA 1/2W R434 401 008 0908 CARBON 180 JA 1/2W R435 402 069 8704 WIRE WOUND 8.2 KA 7W

402 076 0609 WIRE WOUND 8.2 KA 7W R443 401 062 1200 OXIDE-MT 470 JA 1W R444 401 058 3706 OXIDE-MT 1K JA 1W R445 401 058 3706 OXIDE-MT 1K JA 1W R447 401 026 7002 CARBON 3.9K JA 1/6W R448 401 010 3102 CARBON 470 JA 1/2W R451 401 013 7305 CARBON 120K JA 1/4W

R453 401 024 7004 CARBON 1K JA 1/6W R454 401 024 7400 CARBON 10K JA 1/6W R455 401 012 8105 CARBON 100K JA 1/4W R461 401 025 4903 CARBON 180K JA 1/6W R462 401 026 9907 CARBON 4.7K JA 1/6W R481 401 061 0808 OXIDE-MT 3.9 JA 1W R491 401 008 3800 CARBON 2.2 JB 1/2W R501 401 018 2800 CARBON 330 JA 1/4W R505 401 025 7805 CARBON 2.2K JA 1/6W R506 401 026 4605 CARBON 33K JA 1/6W R507 401 025 1902 CARBON 15K JA 1/6W R508 401 027 8305 CARBON 820 JA 1/6W R509 401 006 8807 CARBON 1.8 JA 1/2W R511 401 059 6706 OXIDE-MT 180 JA 1W R514 401 007 1104 CARBON 1K JA 1/2W R571 401 024 7004 CARBON 1K JA 1/6W R576 401 162 3708 MT-GLAZE 4.7K JA 1/10W R577 401 256 0309 MT-GLAZE 820 JA 1/10W R601 401 008 8607 CARBON 220K JA 1/2W R602 402 060 8109 WIRE WOUND 3.9 KA 5W

402 072 4205 WIRE WOUND 3.9 KA 5W R611 401 027 2600 CARBON 5.6K JA 1/6W R615 401 025 8208 CARBON 22K JA 1/6W R617 401 026 5800 CARBON 3.6K JA 1/6W R619 401 008 6009 CARBON 22 JA 1/2W R620 401 007 5805 CARBON 120K JA 1/2W R621 401 007 5805 CARBON 120K JA 1/2W R622 401 014 5201 CARBON 15K JA 1/4W R623 401 024 7400 CARBON 10K JA 1/6W R624A 401 069 1708 OXIDE-MT 68 JA 2W R625 401 067 4206 OXIDE-MT 33 JA 2W R626 401 018 3401 CARBON 3.3K GA 1/4W R627 401 067 4206 OXIDE-MT 33 JA 2W R628 402 000 8305 SOLID 5.6M KA 1/2W R629 402 000 8305 SOLID 5.6M KA 1/2W R635 401 012 8105 CARBON 100K JA 1/4W R636 401 162 3708 MT-GLAZE 4.7K JA 1/10W R637 401 014 6109 CARBON 150K JA 1/4W R638 401 062 3006 OXIDE-MT 47K JA 1W R639 401 025 8208 CARBON 22K JA 1/6W R642 401 012 7009 CARBON 10K JA 1/4W R644 401 058 1108 OXIDE-MT 10 JA 1W R661 401 060 2704 OXIDE-MT 220 JA 1W R662 401 069 0404 OXIDE-MT 6.8 JA 2W R663 401 013 6407 CARBON 12K JA 1/4W R681 401 162 2800 MT-GLAZE 1.8K JA 1/10W R682 401 025 8208 CARBON 22K JA 1/6W R683 401 256 5106 MT-GLAZE 560K JA 1/10W R684 401 150 5905 MT-GLAZE 10K JA 1/10W R685 401 162 3005 MT-GLAZE 22K JA 1/10W R686 401 012 7009 CARBON 10K JA 1/4W R687 401 019 1901 CARBON 3.9K JA 1/4W R688 401 162 3005 MT-GLAZE 22K JA 1/10W R689 401 256 5106 MT-GLAZE 560K JA 1/10W R801 401 256 5809 MT-GLAZE 270K JA 1/10W R811 401 256 6301 MT-GLAZE 47K JA 1/10W R812 401 150 5905 MT-GLAZE 10K JA 1/10W R814 401 162 3708 MT-GLAZE 4.7K JA 1/10W R816 401 162 3708 MT-GLAZE 4.7K JA 1/10W R818 401 256 6905 MT-GLAZE 680 JA 1/10W R819 401 256 6905 MT-GLAZE 680 JA 1/10W R831 401 150 5905 MT-GLAZE 10K JA 1/10W R832 401 150 6001 MT-GLAZE 0.000 ZA 1/10W R834 401 162 3708 MT-GLAZE 4.7K JA 1/10W R835 401 162 3708 MT-GLAZE 4.7K JA 1/10W R836 401 162 3708 MT-GLAZE 4.7K JA 1/10W R837 401 162 3708 MT-GLAZE 4.7K JA 1/10W

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R838 401 162 3708 MT-GLAZE 4.7K JA 1/10W R839 401 255 6500 MT-GLAZE 100 JA 1/10W R840 401 255 6500 MT-GLAZE 100 JA 1/10W R841 401 162 3708 MT-GLAZE 4.7K JA 1/10W R842 401 162 3708 MT-GLAZE 4.7K JA 1/10W R851 401 256 7605 MT-GLAZE 3.9K JA 1/10W R853 401 162 4101 MT-GLAZE 5.6K JA 1/10W R855 401 162 4101 MT-GLAZE 5.6K JA 1/10W R857 401 162 4101 MT-GLAZE 5.6K JA 1/10W R861 401 152 3206 MT-GLAZE 330 JA 1/10W R862 401 150 5905 MT-GLAZE 10K JA 1/10W R863 401 150 5905 MT-GLAZE 10K JA 1/10W R870 401 025 8208 CARBON 22K JA 1/6W R871 401 150 5905 MT-GLAZE 10K JA 1/10W R878 401 162 4101 MT-GLAZE 5.6K JA 1/10W R879 401 024 7400 CARBON 10K JA 1/6W R881 401 150 5905 MT-GLAZE 10K JA 1/10W R883 401 256 1702 MT-GLAZE 33K JA 1/10W R886 401 162 3005 MT-GLAZE 22K JA 1/10W R891 401 162 2909 MT-GLAZE 220 JA 1/10W R892 401 255 6005 MT-GLAZE 1M JA 1/10W R893 401 255 6005 MT-GLAZE 1M JA 1/10W R894 401 255 6500 MT-GLAZE 100 JA 1/10W R896 401 256 1702 MT-GLAZE 33K JA 1/10W R897 401 027 8602 CARBON 8.2K JA 1/6W R898 401 027 5205 CARBON 680 JA 1/6W R899 401 024 7004 CARBON 1K JA 1/6W

VARIABLE RESISTORVR631 645 006 5514 VR,SEMI,2.2K N

645 003 5579 VR,SEMI,2.2K N 645 023 5160 VR,SEMI,2K N 610 239 7574 VR B-2K

TRANSFORMER T401 652 000 0711 TRANS,FLYBACK T431 610 000 1060 DRIVE TRANS

652 000 0698 TRANS,DRIVE T611 652 000 1640 TRANS,POWER,PULSE

COIL L136 645 008 2894 INDUCTOR,5.6U K L140 645 001 4567 INDUCTOR,10U K L141 645 003 9751 INDUCTOR,18U K L151 645 003 9713 INDUCTOR,15U K L171 645 032 8633 TRANS,OSC,45.75MHZ L201 645 008 0159 INDUCTOR,47U K L431 610 031 9998 PIPE CORE

652 001 0475 CORE,PIPE L432 610 031 9998 PIPE CORE

652 001 0475 CORE,PIPE L444 645 036 7458 COIL,LINEARITY L445 610 000 0278 COIL

610 205 1117 COIL L601 610 031 5938 LINE FILTER

645 017 6159 LINE FILTER

DIODED002 408 008 2406 DIODE 1N4148

407 012 4406 DIODE 1SS133 407 013 4306 DIODE 1S2076A 407 013 7109 DIODE 1S2473

D008 407 012 4406 DIODE 1SS133 D009 407 099 5808 ZENER DIODE MTZJ7.5A

407 057 6304 ZENER DIODE RD7.5EB1 D103 407 100 0204 ZENER DIODE MTZJ36A

407 056 2307 ZENER DIODE RD36EB1

D191 408 008 2406 DIODE 1N4148 407 013 4306 DIODE 1S2076A

D1910 407 116 6504 LED SLP-181B-51 D350 408 008 2406 DIODE 1N4148

407 013 4306 DIODE 1S2076A D351 407 099 6003 ZENER DIODE MTZJ9.1B

407 057 9701 ZENER DIODE RD9.1EB2 D381 407 063 8903 ZENER DIODE MTZJ5.6C

407 057 0104 ZENER DIODE RD5.6EB3 D383 408 008 2406 DIODE 1N4148

407 013 4306 DIODE 1S2076A D384 408 008 2406 DIODE 1N4148

407 013 4306 DIODE 1S2076A D385 408 008 2406 DIODE 1N4148

407 013 4306 DIODE 1S2076A D443 407 124 6404 DIODE ERA18-04

407 007 6606 DIODE ES1 407 124 5506 DIODE RMPG06G

D445 408 008 2406 DIODE 1N4148 407 013 4306 DIODE 1S2076A

D446 407 099 5907 ZENER DIODE MTZJ8.2C 407 057 8407 ZENER DIODE RD8.2EB3

D447 408 008 2406 DIODE 1N4148 407 013 4306 DIODE 1S2076A

D461 408 008 2406 DIODE 1N4148 407 013 4306 DIODE 1S2076A

D491 407 124 6404 DIODE ERA18-04 407 007 6606 DIODE ES1 407 124 5506 DIODE RMPG06G

D501 407 005 7308 DIODE EM01Z 408 009 9008 DIODE BYD33D

D521 407 005 7308 DIODE EM01Z 407 005 8602 DIODE ERA15-02 408 009 9008 DIODE BYD33D

D571 407 099 7901 ZENER DIODE MTZJ20B 407 055 1806 ZENER DIODE RD20EB2

D572 408 008 2406 DIODE 1N4148 407 013 4306 DIODE 1S2076A

D603 407 006 6300 DIODE ERC05-10B 407 009 6901 DIODE RM11C

D604 407 006 6300 DIODE ERC05-10B 407 009 6901 DIODE RM11C

D605 407 006 6300 DIODE ERC05-10B 407 009 6901 DIODE RM11C

D606 407 006 6300 DIODE ERC05-10B 407 009 6901 DIODE RM11C

D610 407 104 2402 PHOTO COUPLE PC817C 407 106 6101 PHOTO COUPLE PC817D

D614 408 008 2406 DIODE 1N4148 407 012 4406 DIODE 1SS133 407 013 4306 DIODE 1S2076A 407 013 7109 DIODE 1S2473

D616 408 008 2406 DIODE 1N4148 407 012 4406 DIODE 1SS133 407 013 4306 DIODE 1S2076A 407 013 7109 DIODE 1S2473

D617 407 007 6606 DIODE ES1 407 007 6903 DIODE ES1Z 408 009 9008 DIODE BYD33D

D618 408 008 2406 DIODE 1N4148 407 012 4406 DIODE 1SS133 407 013 4306 DIODE 1S2076A 407 013 7109 DIODE 1S2473

D619 407 063 9405 ZENER DIODE MTZJ8.2A 407 057 8209 ZENER DIODE RD8.2EB1

D631 407 007 7702 DIODE EU2A D633 407 007 7603 DIODE EU2

!

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!

Ref. No. Part No. Description Ref. No. Part No. Description

Page 21: SERVICE MANUAL Colour Television - Diagramas dediagramas.diagramasde.com/televisores/C20LB87B-20TC645.pdfSERVICE MANUAL Colour Television Product Code: 1 113 378 15 Original Version

407 007 7801 DIODE EU2Z D634 407 009 8905 DIODE RU3M D635 407 009 8905 DIODE RU3M D641 407 099 5600 ZENER DIODE MTZJ6.8A

407 057 4003 ZENER DIODE RD6.8EB1 D661 407 099 6102 ZENER DIODE MTZJ10B

407 054 0008 ZENER DIODE RD10EB2 D683 408 008 2406 DIODE 1N4148

407 012 4406 DIODE 1SS133 407 013 4306 DIODE 1S2076A 407 013 7109 DIODE 1S2473

D685 407 099 5600 ZENER DIODE MTZJ6.8A 407 057 4003 ZENER DIODE RD6.8EB1

D861 407 099 4801 ZENER DIODE MTZJ4.3B 407 056 4707 ZENER DIODE RD4.3EB2

MISCELLANEOUS F601 423 024 8409 FUSE 250V 4A F601-A1 645 000 5077 HOLDER,FUSE F601-A2 645 000 5077 HOLDER,FUSE A101 645 045 4455 TUNER,U/V A1901 645 027 4213 UNIT,REMOCON RECEIVER K1001 645 015 7462 JACK,RCA-2(3-1) K1111 645 002 1145 TERMINAL,BOARD PS601 408 015 1904 THERMISTOR PA3A5180B270

408 042 1601 THERMISTOR PTH451A180M21 SW1901 645 027 7382 SWITCH,PUSH 1P-1TX1 SW1902 645 027 7382 SWITCH,PUSH 1P-1TX1 SW1903 645 027 7382 SWITCH,PUSH 1P-1TX1 SW1904 645 027 7382 SWITCH,PUSH 1P-1TX1 SW1905 645 027 7382 SWITCH,PUSH 1P-1TX1 SW601 645 017 0928 SWITCH,PUSH POWER 2P-2T

645 024 0607 SWITCH,PUSH POWER 2P-2T X131 421 006 3206 SAW F TSF5221P X141 610 015 3059 TRAP,CERAMIC 4.5MHZ

652 000 0230 TRAP,CERAMIC 4.5MHZ X151 610 015 2946 CERAMIC FILTER 4.5MHZ

645 030 1049 CERAMIC FILTER 4.5MHZ 652 000 1466 CERAMIC FILTER 4.5MHZ

X211 610 012 0655 CRYSTAL OSCILLATOR 652 000 1695 OSC,CRYSTAL 3.579545MHΩ

X212 645 001 6172 OSC,CRYSTAL 3575.611KHZ X213 610 012 1294 CRYSTAL OSCILLATOR X351 645 030 1889 OSC,CERAMIC 503KHZ X801 645 004 1938 OSC,CRYSTAL 32.768KHZ

645 004 1945 OSC,CRYSTAL 32.768KHZ

610 292 2998 ASSY,PWB,CRT F3BW1AA0B10E646BB

TRANSISTOR Q701 405 041 6507 TR 2SC2621-D-RA

405 041 6705 TR 2SC2621-E-RA 405 066 9903 TR 2SC2688(1)-K 405 067 0008 TR 2SC2688(1)-L 405 067 0107 TR 2SC2688(1)-M 406 000 3605 TR 2SC3620(LB-SAN-1)

Q711 405 041 6507 TR 2SC2621-D-RA 405 041 6705 TR 2SC2621-E-RA 405 066 9903 TR 2SC2688(1)-K 405 067 0008 TR 2SC2688(1)-L 405 067 0107 TR 2SC2688(1)-M 406 000 3605 TR 2SC3620(LB-SAN-1)

Q721 405 041 6507 TR 2SC2621-D-RA 405 041 6705 TR 2SC2621-E-RA 405 066 9903 TR 2SC2688(1)-K 405 067 0008 TR 2SC2688(1)-L

405 067 0107 TR 2SC2688(1)-M 406 000 3605 TR 2SC3620(LB-SAN-1)

Q751 405 134 5905 TR 2SA1037AK-T146-R 405 147 2205 TR 2SA1037AK-S-T146 405 002 0308 TR 2SA1037K T146 R 405 002 0407 TR 2SA1037K T146 S 405 002 6706 TR 2SA1179-M6-TB 405 002 6904 TR 2SA1179-M7-TB 405 163 1503 TR 2SA1179N-M6-TB 405 163 2708 TR 2SA1179N-M7-TB

CAPACITORC701 403 157 6404 CERAMIC 330P K 50V C710 403 056 0008 ELECT 4.7U M 250V C711 403 157 6404 CERAMIC 330P K 50V C721 403 157 6404 CERAMIC 330P K 50V C731 403 077 2708 CERAMIC 1000P P 2K

403 077 2807 CERAMIC 1000P Z 2K C751 403 044 1703 ELECT 470U M 16V

RESISTOR R701 401 105 4502 MT-GLAZE 390 JA 1/16W R703 401 105 5202 MT-GLAZE 470 JA 1/16W R704 401 065 4604 OXIDE-MT 12K JA 2W R705 401 009 1508 CARBON 2.7K JA 1/2W R711 401 105 4502 MT-GLAZE 390 JA 1/16W R713 401 105 5202 MT-GLAZE 470 JA 1/16W R714 401 065 4604 OXIDE-MT 12K JA 2W R715 401 009 1508 CARBON 2.7K JA 1/2W R721 401 105 4502 MT-GLAZE 390 JA 1/16W R723 401 105 5202 MT-GLAZE 470 JA 1/16W R724 401 065 4604 OXIDE-MT 12K JA 2W R725 401 009 1508 CARBON 2.7K JA 1/2W R732 401 015 6504 CARBON 2.2 JA 1/4W R751 401 150 6001 MT-GLAZE 0.000 ZA 1/10W R752 401 150 5905 MT-GLAZE 10K JA 1/10W R753 401 150 5905 MT-GLAZE 10K JA 1/10W

DIODE D751 407 012 4406 DIODE 1SS133 D752 407 012 4406 DIODE 1SS133 D753 407 012 4406 DIODE 1SS133 D754 407 012 4406 DIODE 1SS133

MISCELLANEOUSK701 645 026 2005 SOCKET,CRT 8P !

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Q901

W901

L901

SP901

K701

C710

JS741

Q751

D752

D753

D754

R751

R752

D751

C751

R753

L700

C700

R725

C741

D741

D742L705

Q721-L

Q701-L

Q711-L

R744

R742

Q741

R741

C721

R721

R722

R712

R711

C711

C701 R701

R702

R723

R713

R703

L701 C732

K7B

K7A

R704

R725-M

R715-M

K7M

K7D

C731

R732

R705

Q701

R715

R714

Q711

R724

Q721

Q613H7

KE-2

KE-1

KAC-1

KAC-2

C610

C602

C603

F601-A2

F601-A1

F601JS600

JS610

C607-H1C607-H2

R602

D605

D603

D604

D606

L601

R601

C607

C601

C606

C605

C604

SW601

PS601

VA602

R602-H1

R602-H2

R602-H3

SW601-H4

SW601-H3 SW601-H1

SW601-H2

PS601A

JS603

JS604KE

KAC

L637

Q432-H11Q432-H10

IC501H6IC501H5

R014A

L001

R663

R1802

R1801Q1800

D683

C685

R685

D685

R683

R682

VR631

R635

R636

R637R638

R639

R684

D641

Q631

Q685

Q686

T611H5

T611H2

T611H8T611H17

R627-H1

R625-H1

R625-H2R627-H2

R627

Q613H6Q613H5Q613H4

Q613H1Q613H2Q613H3

L610

L621

R623

D614

D618

D619

C613

R611

Q611

R617

D616

D617

R615

R620

R621

R622

C614

R619

R626

C615

Q612C617

R624AQ613

C616

R625

T611

T611H11

R624AH2 R624AH1

R034

C006

IC001

C005

C004

R005

R006D002

D001

C003 R003

C895

R898

R897

R896

R899

R816R814

R811

R812

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5VRC

5VRC

25V

9V

16V

130V

5VRC

5V

5V

5V

25V

P.F

16V

P.F

5V

P.F

9V

9V

25V

5VRC

5VRC

130V

5V

COLOUR TELEVISION

CHASSISSERIES

SERVICE REF. NO.

LLLLCCCC1111----BBBB

PRODUCT SAFETY NOTICE:

Product safety should be considered when acomponent replacement is made in any areaof a receiver.

Components indicated by a mark in thiscircuit diagram show components whose values have special significance to productsafety. It is particularly recommended that onlyparts specified on the part service manual beused for components replacement pointed outby the mark.

CIRCUIT DIAGRAM NOTICE:1. All resistance value are in ohms, K=1,000, M=1,000,000.2. All resistance rated wattages are 1/6W unless otherwise noted.3. Excepting electrolytic capacitors, all capacitance values of less than 1

are expressed in µ F and more than 1 are pF.4. All capacitance rated voltages are 50V unless otherwise noted.5. All inductance values are in µ H.6. Voltage readings take with a "VTVM" are from point indicated chassis

ground. Voltage readings taken by using PAL colour bar signal are with all controls at normal position. Some voltage may vary with signalstrength.

7. Waveform were taken with PAL colour bar and controls adjusted for normal picture. Waveforms were taken by using a wide band oscillo-scope and a low capacity probe.

8. This circuit diagram covers a basic or representative chassis only. There may be some components or partial circuit differences between theactual chassis and the circuit diagram.

9. Parts specified with "X" are not installed in this model.10. Parts specified with "J" are just jumper wires.

THE SERVICE PRECAUTION:The area enclosed by this line( ) is directly connected with AC mains voltage.When servicing the area, connect an isolating transformer between TV receiver and ACline to eliminate hazard of electric shock.

11. Expression of capacitance and resistance in circuit diagrme.

20-F5TT

TRANSISTOR, DIODE AND INTEGRATED CIRCUIT TERMINAL GUIDEC: COLLECTORB: BASEE: EMITTER

A: ANODEK: KATHODE

B

B

C

C

E

E

C EB C E

B

B

C

E

AK

K

A

A

K

FUSIBLERESISTOR

PARTICULARPARTS SYMBOL

1

1

1

N/2

N/2 + 1

N NON POLEELECTRICCAPACITOR

POSISTER

C

EB

CHIP COMPONENTS

K

A

TRANSISTOR

DIODE

123

RESISTOR

12 X 103=12K

12. List of replaceable transistors and diodes.

DIODE

M 1SS176, 1SS133, GMA01

P 1S1553, 1S2076A, 1S2471, 1N4148

R 1S1555, 1S2473, 1S2076, DS442, 1N4148

2SA608 2SA564A 2SA1015 2SA933 2SA933S KSA733C

Z E,F Q,R O,Y,G Q,R Q,R

Y E,F Q,R O,Y,G Q,R

W F R Y,G R

V E,F Q,R O,Y,G Q,R Y,G

U F R Y,G R G

(PNP. TR)

(DIODE)

2SC536 2SC945A 2SC1815 2SC1740 2SC1740S KSC945C

A E,F,G P,Q,R O,Y,G Q,R,S Q,R,S

B E,F,G P,Q,R O,Y,G Q,R,S

D F,G P,Q Y,G Q,R,S

F F,G P G R,S

H F,G P,Q Y,G Q,R,S Y,G

I E,F,G P,Q,R O,Y,G Q,R,S Y,G

G F,G P G R,S G

(NPN. TR)

Capacitance (Example)1000 C M 2000 D

CharacteristicCapacitance value (220pF)Allowable error (±20%)Kind (Ceramic)Rated voltage (1,000V)

J= ± 5%K= ±10% M= ±20%

Resistance (Example)1/2 N J 1.2

Resistance value (1.2Ω)Allowable error (±5%)Kind (M.carbon)Rated wattage (1/2W)

D: CarbonN: Metalized carbonS: Oxied metalizedW: Wire woundingC: Solid

T, A, U, D: ElectrolyticC, K, B: CeramicF: Mylar filmM, N: PolypropyleneZ: Metalized paper

C20LB87B-00

Page 23: SERVICE MANUAL Colour Television - Diagramas dediagramas.diagramasde.com/televisores/C20LB87B-20TC645.pdfSERVICE MANUAL Colour Television Product Code: 1 113 378 15 Original Version

IC801 (CPU)Pin-1: 4.7V 2: 4.6V 3: 5.0V 4: 5.0V 5: GND 6: 1.8V 7: 2.5V 8: 5.0V 9: 1.4V

10: 2.5V 11: 0.9V 12: 0V 13: 4.9V 14: 3.3V 15: 2.6V 16: 0V 17: 4.8V 18: 4.1V19: 0V 20: 0V 21: 0V 22: 0V 23: GND 24: GND 25: GND 26: GND 27: 4.5V:28: 5.0V 29: 0V 30: 2.4V 31: 4.9V 32: 5.0V 33: 0V 34: 4.9V 35: 5.0V 36: 5.0V

A101TUNER

IC001AUDIO AMP.

IC501

VE

RT

. DE

F.

Q432HORIZ. OUT B

C

E

T431H-DRIVETRANS.

Q613POWER OUT

B

C

E

HEADPHONE JACK

IC801CPU

(Solder side)

IC802

MEMORY

IC201IF/VIDEO/CHROMA

T401F.B.T.

T611CONVERTER

TRANS.

MAIN BOARD (Component Location)

F5TT

Q701B-OUT

Q721G-OUT

Q711R-OUT

CRT BOARD (Component Location)

Waveforms & Voltages(On the Main Board)

Q140B 5.7VC 0VE 6.3V

Q141B 5.9VC 0VE 6.5V

Q171B 3.5VC 9.3VE 2.9V

Q261B 1.6VC 0VE 2.3V

Q432B 2.5VC 131.7VE 2.5V

Q576B 0VC 4.5VE 0V

Q611B 15.3VC -0.2VE 14.9V

Q612B 0VC -0.3VE -0.2V

Q613B 0VC 324VE -0.3V

Q631B 3.5VC 18.0VE 3.3V

Q213B 0.6VC 0VE 0V

5.0Vp-p Horiz. 2.5Vp-p Vert.6.5Vp-p Horiz.

Q431B 0.3VC 10.5VE 0V

1.2Vp-p Horiz.1.4Vp-p Horiz.

1.7Vp-p Horiz.

50Vp-p Horiz.

47Vp-p Vert. 2.5Vp-p Vert.

1000Vp-p Horiz.

5.0Vp-p Horiz. 5.0Vp-p Vert.

550Vp-p

1.7Vp-p Horiz.

IC191Pin-1: 9.2V 2: GND 3: 5.0V

IC201 (IF/VIDEO/CHROMA) ::Pin-1: GND 2: 4.5V 3: 0.4V 4: 5.3V 5: 1.0V 6: 1.5V 7: 1.5V 8: 4.9V 9: 0V

10: 4.6V 11: 0.6V 12: 2.4V 13: 0V 14: 4.7V 15: 5.4V 16: 5.1V 17: 4.4V 18: 2.5V19: 2.3V 20: 2.4V 21: 4.1V 22: 8.6V 23: 2.5V 24: 2.6V 25: 5.2V 26: 4.8V 27: 1.0V28: 2.6V 29: 3.4V 30: 2.5V 31: 2.7V 32: 3.1V 33: 3.7V 34: 1.6V 35: 3.0V 36: 1.9V 37: 0V 38: 1.6V 39: 2.7V 40: 3.1V 41: 1.4V 42: 9.2V 43: 1.7V 44: 1.7V 45: 3.5V46: 2.8V 47: 2.3V 48: 2.3V 49: 4.0V 50: 4.1V 51: 3.1V 52: 5.6V

IC501 (VERT. OUT)Pin-1: GND 2: 14.8V 3: 24.8V 4: 4.4V 5: 4.4V 6: 24.4V 7: 2.4V

IC001 (AUDIO AMP.)Pin-1: 6.3V 2: GND 3: 6.3V 4: 0.7V 5: 3.1V 6: 5.6V 7: 5.5V 8: GND 9: 5.7V

10: 12.5V

IC802 (MEMORY)Pin-1 GND 2: GND 3: GND 4: GND 5: 5.0V 6: 5.0V 7: GND 8: 5.0V

Q212B 0VC 4.7VE 0V

Q661B 9.9VC 11.3VE 9.3V

Q681B 0VC 9.9VE 0V

Q683B 23.9VC 24.5VE 24.6V

Q686B 36.2VC 0VE 36.2V

Q871B 0VC 4.8VE 0V

Q881B -5.9VC 4.1VE 0V

Q685B 0VC 36.1VE 1.0V

Q861B 4.4VC 4.9VE 5.0V

Q684B 0.7VC 0VE 0V

4.9Vp-p 5.9Vp-p 6.5Vp-p 5.2Vp-p 5.4Vp-p 2.3Vp-p 0.9Vp-p

1.8Vp-p 1.7Vp-p 47.2Vp-p 2.2Vp-p 4.9Vp-p

24.0Vp-p 920Vp-p 480Vp-p

IC201-pin11<Sandcastle>

IC201-pin12<H drive>

IC201-pin18<R out>

IC201-pin19<G out>

IC201-pin20<B out>

IC201-pin21<V drive>

IC201-pin36<CVBS int.>

IC201-pin39<Sync in>

IC201-pin38<Y out>

IC501-pin2<V out>

IC501-pin4<V drive>

IC801-pin18<H sync>

IC801-pin17<V sync>

IC201-pin52<IF out>

Q431-C<H drive>

Q432-C<H out>

Q432-B<H out>

Q613-C<Power out>

1.8Vp-p

IC651Pin-1: 12.9V 2: GND 3: 5.0V

(On the CRT Board)

Q701B 2.1VC 139.4VE 1.7V

Q711B 2.1VC 139VE 1.7V

Q721B 2.0VC 142.5VE 1.6V

Q751B 9.2VC 0VE 9.1V

Q701-B<B drive>

Q721-C<G-out>

Q701-C<B-out>

Q711-C<R-out>

Q711-B<R drive>

Q721-B<G drive>

112Vp-p 5.1Vp-p 110Vp-p 5.6Vp-p 6.0Vp-p132Vp-p

Q886B 0.7VC 0VE 0V

17.0Vp-p Horiz.

Q111B 1.1VC 0.4VE 6.2V

Page 24: SERVICE MANUAL Colour Television - Diagramas dediagramas.diagramasde.com/televisores/C20LB87B-20TC645.pdfSERVICE MANUAL Colour Television Product Code: 1 113 378 15 Original Version

NEWSAN S. A. Una empresa del grupo SANYO Electric Co.Sep. /’01