3

INTRODUCTION

GENERAL FEATURE

SPECIFICATIONS1. MODEL: CRD-8484B

1) SUPPORTED SYSTEM • IBM Compatible 486SX or Above (With PIO mode 4 recommended)

2) SUPPORTED OS

3) GENERAL PERFORMANCE• Data Transfer Rate .........................................................................................Sustained Data Transfer Rate

22Times Speed (Inner side) : 3,300 kbytes/sec48 Times Speed (max., Outer side) : 7,200 kbytes/sec

• Data Buffer Capacity.....................................................................................................................128 kbytes• Access Time.......................................................................................Random Access Time : 75 ms Typical

4) POWER REQUIREMENTS• Voltage ......................................................................................................................................+5V DC +5%

+12V DC +5%• Ripple ..................................................................................................................+5V : Less than 100mVp-p

+12V : Less than 100mVp-p• Current .......................................................................................................................+5V : 0.9A (Maximum)

+12V : 1.5A (Maximum)

5) AUDIO PERFORMANCE• Frequency Response.....................................................................................................20Hz~20KHz(+3dB) • S/N Ratio (IHF-A+20 KHz LPF) .......................................................................75 dB (Typical at 1 KHz 0dB)

70 dB (Limit at 1 KHz 0dB)• T.H.D. (IHF-A+20 KHz LPF)............................................................................0.05% (Typical at 1 KHz 0dB)

0.15% (Limit at 1 KHz 0dB)• Channel Separation (IHF-A+20 KHz LPF) .............................................................................75 dB (Typical)

70 dB (Limit)• Output Voltage (1kHz 0dB) 47KΩ Load...............................................................................0.75Vrms + 10%• Headphone Level (1kHz 0dB) 33Ω Load...............................................................................0.7Vrms + 20%

• Enhanced IDE interface• Internal 5.25 inch, halfheight CD-ROM Drive• Fast 75ms Average Access Time• Max 7,200KB/sec Sustained Transfer rate• Photo-CD Multisession Disc Spec compliant• Multimedia MPC-3 Spec compliant• Power Tray Loading/Ejection Mechanism• 3 Way Eject support

(Software, O/C Button, Emergency Eject)• Closed Enclosure• Built-in ATAPI Interface Controller

• Software Volume Control• 8 Times Digital Filter for CD Audio• Built-in MODE-1 ECC/EDC• MTBF 125,000h POH (at 10% Utilization)• PIO Mode 4 & Multi DMA Mode 2 support• Horizontal or Vertical Mounting• Digital audio output connector• Digital audio through ATAPI Interface• Subcode (P-W) through ATAPI Interface• Spin-down Mode for energy saving

• MS-DOS Version 3.1 or Higher• Windows '95/'98/’2000

• Solaris Ver 2.4 or Higher• Linux slackware Ver 2.3

• Windows NT 4.0 or later• OS/2 Warp (Ver 3.0)

This service manual provides a variety of serviceinformation. It contains the mechanical structure ofthe CD-ROM Drive together with mechanicaladjustments and the electronic circuits in schematic

form. This CD-ROM Drive was manufactured andassembled under our strict quality control standardsand meets or exceeds industry specifications andstandards.

4

LOCATION OF CUSTOMER CONTROLS

(1) Headphone Jack3.5mm jack for monitoring the audio signal from audioCDs.

(2) Headphone Volume ControlAdjusts the headphone sound level.

(3) Disc DrawerAccepts a CD-ROM disc on its tray.

(4) Busy IndicatorThe Busy Indicator lights during initialization and data-read operations.

(5) Emergency Eject HoleInsert a paper clip here to eject the drawer manually orwhen there is no power.

(6) Play/Skip ButtonWhen an Audio CD is in the Disc Drawer, pressingthis button will start playing audio CDs from the firsttrack. If an audio CD is playing, pressing this buttonwill skip to the next track.

(7) Open/Close/Stop ButtonThis button is pressed to open or close the CD tray.If an audio CD is playing, pressing this button will stopit, and pressing it again will open the tray.

COMPACT

1 2 54 6 73

Figure 1. Front View

(1) Digital Audio Output ConnectorThis is a digital audio output connector or Video CDoutput connector.You can connect this to the digital audio system orVideo CD Board.

(2) Analog Audio Output ConnectorThe Audio Output Connector connects to a soundcard.The supplied audio cable is a SoundBlaster® typecable. If you have a different sound card, you willneed to contact the sound card manufacturer to obtainthe proper cable for that card.

(3) Master / Slave / CSEL JumperThese three jumpers are used to set the CD-ROMDrive to either a Master, Slave, or CSEL drive.

(4) Interface ConnectorThis 40-pin connector is used to transfer and controlsignals between the CD-ROM Drive and your PC.Connect the 40-pin IDE cable in your PC to thisconnector.

(5) Power-in ConnectorAttach a power cable from the computer to thisconnector.

1 2 543

FRONT

REAR

Figure 2. Back View

2. Trouble List (Circuit)

A. LED doesn’t light.B. Pick-Up doesn’t move to the inner-track.C. The Laser of Pick-Up doesn’t light.D. Pick-Up lens doesn’t move up and down.E. Disc doesn’t rotate.F. TOC isn’t read. (The LED turns on, but doesn’t flicker.)G. During Audio CD Play, LED flickers, but Speaker is silent.

23

TROUBLESHOOTING GUIDE

1. Initial Lead-in Operation

Reset or Power-On.

LED Flickers.

Pick-Up moves to the inner-Track.

Laser on the Pick-Up lights.

Focus Search (through moving up and down the lens of Pick-Up)

Focus Servo On (FEO(TP15) signal generation)

Rotate disc.

Tracking Servo On (TEO(TP14) Signal generation)

Spindle Servo On (SPO(TP25) Signal generation)

Read TOC Area (LED Flickers)

Search the Start of Data Area and then pause.

24

3. Troubleshooting Guide

A. LED doesn’t light.

Check Power Voltage (TP1:3.3V, TP2:12V)Reference Voltage[TP3:VC(2.5V) and GND.]

Does “H” output in IC501 pin ?

Check and replace R105, R106, Q12and LED701 (LED702 for NECCI).

Is the CLOCK Frequency ofIC501 pin ,33.86MHz?

Check the power inputpattern.

Check IC501.

Check and replace X10;33.86MHz.

Is the CLOCK Frequency of IC501 pin33.86MHz?

Check and replace IC501.

YES

OK

NG

YES

YES

NO NO

NO

170 93 94

54

A-1

A-1

25

B. Pick-Up doesn’t move to the inner track.

Do the signals appear at IC501pin , ?(Refer to Fig. B-1.)

Do the signals appear in PN301pin?(Refer to Fig. B-2.)

Does “H” output at IC201 pin ?

Is the 2.5V at IC201 pin ?

Check the pattern fromIC501 pin to IC201 pin .

Check IC501.

Replace IC102.

Check the PN301, and thenreplace the Sled Motor.

YES

YES

YES

YES

NO

NO

Replace IC201.NO

NO

34

41

25

35

10741

CH1PIN34DA0

CH2PIN35DA1

CH1 TP4

(/A)

(A)

(/B)

(B)

CH2 TP5

CH3 TP6

CH4 TP7

Fig. B-1. DA0 and DA1 Signals Fig. B-2. TP4, TP5, TP6 and TP7 Signals

Check the pattern fromIC501 pin to R42and then replace IC501.

26

Does “Low” output at IC102pin ?

Is the voltage of IC102 pin

(LDD) 2V?

Check Pick-Up FFC, PN101.

Check Q10, C10, C32,R113, R114 and thenreplace IC102.

Replace IC501.

YES

YES

NO

NO13

157

15

Does the focus search signalappear at FDO (TP9)?(Refer to Fig. D-1.)

Is the 2.5V at IC201 pin ? Replace IC102.

YES

YES

YES

NO

NO

Replace IC201.NO

25

Does the focus search signalappear between F+ (TP10)and F- (TP11)?(Refer to Fig. D-2.)

C. The Laser of Pick-Up doesn’t light.

D. The Pick-UP lens doesn’t move up and down.

D-1

27

Check the pattern frompin , of IC201 topin , of PN101.

Check the PN101, Pick-UpFFC.

Replace the Pick-Up.

Replace PN101 or Pick-UpFFC.

OK

OK

NG

34 351 4

CH1TP9(FDO)

CH1TP10(F+)TP11(F-)

Fig. D-1. FDO Signal Fig. D-2. Focus Search Signal

D-1

28

Does the signal appear atthe SP0 (TP25)?(Refer to Fig. E-3.)

Do the signals appear atIC201 pin (W), (V),and (U)?

Replace IC501.

Replace IC201.

YES

NO

NO1214

13

Check the pattern fromIC201 pin , , toPN201 , , .

YES

OK

12 13 1413 12 11

Check Spindle Motor FFCand then replace the

Spindle Motor.

Does the signal appear atFEO (TP15) when theIC501 pin opened?(Refer to Fig. E-1.)

YES

YES YES

NO NO

Replace IC501.

Replace IC501.

Replace Pick-Up.

NODo the signal appear atTP15 (FEO)?(Refer to Fig. E-2.)

Does the signal appear atF+ (TP10) during focussearch?

E. Disc doesn’t rotate.

144

29

Fig. E-2. FEO Signal

CH1TP15:FEO

Fig. E-3. SPO Signal

CH1TP25:SPO

Fig. E-1. S-Curve

CH1TP15:S-Curve

30

Is the Focus Servo ON?(Does FEO (TP15) signalappear?)

Does A, B, C, D signalappear at IC102 pin ,

?

YES YES

NO7

8

NO

Is the Tracking Servo ON?(Does TEO (TP14) signalappear?)

Does E, F signal appearat IC102 pin , ?

YES

NO

9

YES

Is TOC area on the discread? (Does LED flicker?)

Does the other discoperate normally?

Normal Disc is defective.

YES YES

NO

10

NO

Does RFI signal appear?

Is Spindle Servo ON?(Does SP0 signal (TP25)appear?)

YES YES

NO

NO

NODoes RFIN signal appearat IC102 pin ?6

Replace IC102.

Replace IC102.

Replace IC501.

Replace Main CircuitBoard or MD Ass’y.

NO

Refer to C.(The Laser of Pick-Updoesn’t light.)

F. TOC isn’t read.

31

Does Audio signal appearat IC501 pin , ?(Refer to Fig. G-1.)

YES

NO87 90 Replace IC501.

Does “H” signal appear at

IC501 pin ?

YES

NO

113

Check the IC501 pinand then replace IC501?

113

Check C87.

YES

YES

YES

Are L-ch, R-ch signalsappear at JK701 andAudio Line out connectoreach?

NO Check JK701 andL701,L703.

Does Audio signal appearat IC602 pin , ?

NO

1 7Is the voltage of IC602pin 2.5V?6

NOReplace IC602.

G. During Audio CD play, LED flickers, but Speaker is silent.

G-1

32

Is the connectionbetween JK801 (or AudioLine out connector) andLine (or Jack) normal?

NO Check the JK801 andAudio line pattern.

YES

Check your sound card,Audio Cable, Speaker,Volume and HeadphoneJack.

Fig. G-1. Audio Signal

CH1PIN87 ofIC501

CH2PIN90 ofIC501

G-1

1. CABINET and CIRCUIT BOARDDISASSEMBLY

1-1. Bottom ChassisA. Release 4 screws (A) and remove the Bottom

Chassis in the direction of arrow (1). (See Fig. 1-1)

1-2. Front Bezel AssyA. Insert and Press a rod in the Emergency Eject

Hole and then the CD Tray will open in thedirection of arrow (2).

B. Remove the Tray Door in the direction of arrow (3)by pushing it outward.

C. Release 3 stoppers and remove the Front BezelAssy.

1-3. Cabinet and Main Circuit BoardA. Remove the Cabinet in the direction of arrow (4).

(See Fig. 1-3)B. Release 2 hooks (a) and remove the CD Tray.C. Remove the Soldering of the LD- and LD+ (B) for

the Loading Motor, and then remove the MainCircuit Board.

D. At this time, be careful not to damage the 3connectors of the Main Circuit Board.

2. MECHANISM ASSYA. Separate the Pick-Up Unit from the Mechanism

Assy.B. Release 1 screws (C) and then remove the Pick-

Up ( ).

DISASSEMBLY

(A)(A)

(A)

(A)

(1)

Bottom Chassis

(3)

(2)

Tray Door

Stoppers

CD Tray

Emergency Eject HoleFront Bezel Assy

(4)

Cabinet

MainCircuit Board

(B)Hooks (a)

Mechanism Assy

Pick-up Unit

(C)

Fig. 1-1

Fig. 1-2

Fig. 1-3

Fig. 1-4

5

13

PHOTO DIODE STRUCTURE OF THE PICK-UP

(1) Focus Error Signal –> (A+C)-(B+D)(Control the Pick-up’s up and down to focus on the Disc)

(2) Tracking Error Signal –> (E-F)(Control the Pick-up’s left and right shift to find the track on the Disc)

(3) RF Signal –> (A+B+C+D)(RF Signal is converted to Data Signal in One Chip IC (IC501))

Three signals (Focus Error Signal, Tracking Error Signal and RF Signal) above are I-V converted andamplified at the IC102, and then are transmitted to One Chip IC (IC501) to generate the Servo ControlSignal and Data Signal.

Red laser

Pick-Up module

Tracking

Focusing

B

CE F

D

A

14

REF

REF

REF

REF

REF

REFREF

REF

REF

REF

REFREF

REF

REF

REFVCC VCC

VCC

AP

C

PH

PHEQ-CONTROL

BH

BH

PH-CONTROL

7_MODE 5V

39K

33K

52

5V+

7_MODE

36PH

100K

1

2

3

4

5

6

7

BHC

PHC

RFAO

GND1

RFA-

RFIN

FIN1

35BH

34VCC1

33RFSM

32RHLD

31GND2

30REFL

29FE-

28FE

27TE-

26TE

25TSS

24TS

23VCC2

22TSH

21FBAL

20TBAL

19SGC

100K8

FIN2

56K9

E

F

VC

C

56K10

11

12

REFI

VREF

13LDD

14LDS

15LDON

16GHS

17BHH

18EQS

IC INTERNAL BLOCK DIAGRAM AND PIN DESCRIPTION

• IC102 (LA9246T) : RF Amplifier ICI-V converts and amplifies the signal received from the pick-up and then applies to DSP part of one-chip IC (IC501).

Block Diagram

15

Pin No. Pin Name Descriptions1 BHC Bottom hold external condensor pin for checking RFAGC.

2 PHC Peak hold external condensor pin for checking RFAGC.

3 RFAO RF Pre AMP output

4 GND RF GND

5 RFA- RF Pre AMP (-) input

6 RFIN RF Sum input

7 FIN1 Pickup output (B+D),

8 Fin2 Pickup output (A+C),

9 E Pickup output (E)

10 F Pickup output (F)

11 REFI Eeternal Condensor Pin of Reference Voltage.

12 VREF Reference output

13 LDD APC circuit output

14 LDS APC circuit input

15 LDON Laser on/off.

16 GHS RF signal gain control.

17 BHH BH response control.

18 EQS RF equalizer. PH detection control

19 SGC Servo gain control

20 TBAL TE balance adjust

21 FBAL FE balance adjust

22 TSH TS wide band control

23 VCC2 Servo VCC

24 TS TS output

25 TSS TS wide band control

26 TE TE signal output (To DSP)

27 TE- TE gain control

28 FE FE signal output (To DSP)

29 FE- FE gain control

30 REFL Reflection output (To DSP)

31 GND2 Servo GND

32 RHLD RF hold control

33 RFSM EFM signal output (To DSP)

34 VCC1 RF VCC

35 BH RF bottom hold output (To DSP)

36 PH RF peak hold output (To DSP)

Pin Description

16

• IC201 (M63022FP) : Drive IC (Spindle/Servo Actuator)Rotates the Spindle Motor by receiving MDP signal from IC501.Generates the signal to drive Focus Actuator Coil, Tracking Actuator Coil, Sled Motor, and SteppingMotor by Control Signal input from DSP and u-COM.

Block Diagram

x12 x8x12

FG

HU+HU-HV+HV-

HW+HW-HB

SPIN

REF

SL1IN

SL2IN

FOIN

TOIN

5Vcc

TO

+

TO

-

FO

+

FO

-

GN

D

LO+

LO-

VM3

LOIN+

BRS

OSC

MU1

SSSS

VM

1

RS

P

U V W RS

L1

RS

L2

SL1

+

SL1

-

SL2

+S

L2-

VM

2

FG ReverseDetect

120ßMATRIX

Hall Bias

CTLamp

Directioncomp

Directioncomp Direction

comp

Currentcomp

Currentcomp

Currentcomp

CTLamp

CTLamp

Logic Logic

TSD

BIAS

Frequencygenerator

VM1

RegulatorReg

Pin Description

Pin No. Symbol Description Pin No. Symbol Description1 SL1IN Slide control voltage input 12 SL2IN Slide control voltage input 23 VM2 Motor Power Supply 3 (for Slide)4 RSL2 Slide current sense 25 SL2+ Slide non-inverted output 26 SL2- Slide inverted output 27 GND GND8 RSL1 Slide current sense 19 SL1+ Slide non-inverted output 110 SL1- Slide inverted output 111 GND GND12 W Motor drive output W13 V Motor drive output V14 U Motor drive output U15 RSP Spindle current sensie16 HW- HW- sensor amp. input17 HW+ HW+ sensor amp. input18 HV- HV- sensor amp. input19 HV+ HV+ sensor amp. input20 HU- HU- sensor amp. input21 HU+ HU+ sensor amp. input

22 VM1 Motor Power Supply 1 (for Spindle)23 HB Bias for Hall Sensor24 FG Frequency generator output25 REF Refernce voltage input26 SPIN Spindle control voltage input27 FOIN Focus control voltage input28 TOIN Tracking control voltage input29 GND GND30 5VCC 5V Power Supply (for FS, TS)31 TO- Tracking inverted output32 TO+ Tracking non-inverted output33 GND GND34 FO+ Focus non-inverted output35 FO- Focus inverted output36 LO+ Loading non-inverted output37 LO- Loading inverted output38 BRS Brake select control terminal39 VM3 Motor power supply 3.(for Loading)40 LOIN+ Loading control input( +)41 MU1 Mute 142 OSC PWM carrier oscilation set

Driver

VCECPLL

TDO, FDOSLDO, SPDO

*11

*1

*12*2

*14

*3

*4*5*6

LA9238

CD-DSP

Data bus[0.7]DRAMData bus[0.15]

LC895300

LC895299

Adress bus[0.18]Sub-code I/Fde-interleve

Adress generator

Sub-code ECC

Address generator

Address generator

Address generator

Address generator

Address generator

ATAPI I/F

Data output input I/F

MicrocontrollerRAM access

De-scramble &Buffering

ECC & EDC

SRAM

CD-DSP I/F& SYNCDetector

Merge

EXT10CMDI

Each BlockRegister

FGCNT

AudioCircuit

ZRESET

HOST

decoder

*7

*8

*10

*9

*13XTALCK

Each BlockXTAL

Microcontroller

1.5KRAM

Clock generator

BufferDRAM

BusArbiter&DRAMcontroller

Each BlockBus controlsiganl

128KEEPROM

A0~A16

D0~D7

ZOE, ZWE, ZCE

Gray Block si characteristic of LG895300.

InterruptController

Timer

FGCNT CMDI

EXTIISW1SW2SW3

IOPORT0~14

FG

17

• IC501 (HMS895300) : DSP+ATAPI DECODER+DRAM + µ-COM

Block Diagram

*1 EFMIN,EFMIN2,PH,BH,FE,TE,TES,RREC*2 RHLD,TSH,EQS,GHS,LDON,FBAL,TBAL,TOFST,SGC*3 LOUT,ROUT,DOUT*4 DD~DD15,ZDASP,ZPDIAG*5 ZCSIFX,ZCS3FX,DA0~2,ZDIOR,ZDIOW,ZDMACK,ZHRST,CSEL*6 DMARQ,HINTRQ,ZIOCS16,IORDY*7 ZRD,ZWR,ZCS,MCK,SUA0~7*8 D0~7*9 CRCERR/FLOCK,HFLO/WRQ/DIR/TLOCK,FSEQ,FSX/LRCK/FV,EFLG/ CK2/PRF,C2F/PCK,EFMOUT*10 TEST0~2*11 PCKISTF,PCKIFTP,PDO,POS1~3,RF*12 SLCO0~3,JITC,DSLB,PHC,BHC*13 PLL1*14 SLCIT1~2,AD1,VREF,CSS

18

• IC501 HMS895300Pin Description

Pin No. Signal Type COMMENT

1 Vss P Logic GND

2 A11 O PROM ADDRESS

3 A9 O

4 A8 O

5 A13 O

6 A14 O

7 Wstrobe O Write Strobe

8 A16 O 128K

9 A15 O 64K

10 A12 O

11 A7 O

12 A6 O

13 A5 O

14 A4 O

15 A3 O

16 A2 O

17 A1 O

18 A0 O

19 DATA0 B PROM DATA

20 DATA1 B

21 VDDD P DRAM VDD 5V

22 VDD1 P 3.3V

23 Vss P Logic GND

24 VSSD P DRAM GND

25 DATA2 B PROM DATA

26 DATA3 B

27 DATA4 B

28 DATA5 B

29 DATA6 B

30 DATA7 B

31 ZCE O Chip Enable Signal

32 A10 O PROM ADDRESS

33 Psen O Access Enable Signal

34 IOPORT0 B General Input/Output Port

35 IOPORT1 B

36 IOPORT2 B

TYPEI:INPUT B:BIDIRECTION NC:NOT CONNECT O:OUTPUT P:POWER

19

Pin No. Siganl Type COMMENT

37 TEST0 I TEST PIN (GND)

38 WRQ/HFLO/DIR/TLOCK O Monitor Pin

39 FSEQ/DEF O Frame Sync/DEFECT

40 DOUT/TESO O Digital OUT

41 VDD0 P I/O 5V power supply

42 VSS P Logic GND

43 PLL1 O System Clock PLL

44 PLL1VDD P Logic PLL VDD 3.3V

45 PLL1VSS P logic PLL GND

46 CSEL I ATAPI I/F

47 ZHRST I

48 ZDASP B

49 ZCS3FX I

50 ZCS1FX I

51 Vss1 P I/F GND

52 VDD0 P I/O 5V power supply.

53 DA2 I ATAPI I/F

54 DA0 I

55 ZPDIAG B

56 DA1 I

57 ZIOCS16 O

58 Vss1 P I/F GND

59 HINTRQ O ATAPI I/F

60 ZDMACK I

61 IORDY O

62 ZDIOR I

63 ZDIOW I

64 DMARQ O

65 VDD0 P I/O 5V power supply.

66 VDD1 P 3.3V

67 Vss1 P I/F GND

68 DD15 B ATAPI I/F

69 DD0 B

70 DD14 B

72 DD13 B

73 DD2 B

74 DD12 B

75 DD3 B

76 Vss1 P I/F GND

20

Pin No. Siganl Type COMMENT

77 DD11 B ATAPI I/F

78 DD4 B

79 DD10 B

80 DD5 B

81 DD9 B

82 DD6 B

83 DD8 B

84 DD7 B

85 VDD0 P I/O power supply 5V

86 TEST1 I TEST Pin (GND)

87 ROUT O DAC output

88 AUVDD P DAC VDD 5V

89 AUVss P DAC GND

90 LOUT O DAC output

91 Vss P Logic GND

92 XTALCK I XTALCK input

93 XTAL O XTALCK output

94 VDD0 P I/O power supply 5V

95 FSX/LRCK O Monitor port

96 EFLG/CK2 O

97 TRV2/DATA B General input/output port

98 TRV B

99 FLOCK/CRCERR O FLOCK/CRCERR/C2F/PCK output

C2F/PCK

100 EFMOUT O EFM output

101 OUTPORT O General output port

102 SW1 I Tray Close

103 SW2 I Tray open

104 SW3 I Eject Switch

105 IOPORT3 B General input/output port

106 IOPORT4 B

107 IOPORT5 B

108 IOPORT6 B

109 VSSD P DRAM GND

110 VDD1 P 3.3V

111 Vss P logic GND

112 VDDD P DRAM VDD 5V

113 IOPORT7 B General input/output port

114 IOPORT8 B

21

Pin No. Siganl Type COMMENT

115 IOPORT9 B General input/output port

116 DSLB O SLC PWM output

117 AVDD P Slice Level VDD 3.3V

118 SLCIST1 I EFM Slice Level Control port

119 SLCIST2 I

120 SLCO0 O EFM Slice level output

121 SLCO1 O

122 SLCO2 O

123 SLCO3 O

124 EFMIN I EFM input pin

125 EFMIN2 I

126 AVss P Slice Level GND

127 JITC O Jitter output

128 PWM0 I VCO PWM output

129 FR I VCO frequency control port

130 PCKISTF I Frequency comparater charge pump control port

131 PCKISTP I Phase comparater charge pump control port

132 PLL2VDD P VCEC PLL VDD 3.3V

133 PLL2Vss P VCEC PLL GND

134 PDO O Charge Pump Filter

135 PDS1 O Charge Pump select port

136 PDS2 O

137 PDS3 O

138 RPO O P/N Balance Adjust port

139 SVss P Servo GND

140 AD1 I AD input1

141 PH I Peak HOLD

142 BH I Bottom HOLD

143 RREC I Optical judge input port

144 FE I FE input port

145 TE I TE input port

146 TES I TES compartor input

147 VREF I VREF input port

148 PHC O PH Slice condensor input port

149 BHC O BH Slice condensor input port

150 FBAL O Focus Balance port

151 TBAL O Tracking Balance Port

152 SGC O Servo gain control port

153 TOFST O Tracking offset Adjust port

22

Pin No. Siganl Type COMMENT

154 SVDD P Servo VDD 5V

155 SVss P Servo GND

156 TDO O Tracking output

157 FDO O Focus output

158 SLDO O Sled output

159 SPDO O Spindle output

160 VDD0 P A/D & D/A 5V

161 Vss P Logic GND

162 VDD1 P 3.3V

163 RHLD O RFAGC hold output port

164 TSH O TS select port

165 EQS O RF Equalizer select port

166 GHS O RF signnal , TS signal gain

167 LDON O Laser Control port

168 TEST2 I TEST PIN (GND)

169 FG I FG input

170 IOPORT10 B General Input/output port

171 IOPORT11 B

172 IOPORT12 B

173 IOPORT13(Debug1) B Audio Mute

174 IOPORT14(Debug2) B LED Drive port

175 ZRESET I CHIP RESET

176 VDD0 P I/O power supply 5V

A B C D

1

2

3

4

5

+5V

+3.3V3.3V Reg.

M63022FP

LA9246T

HMS895300

FLASHMEMORY

RF Amp.

DSP+Decoder+DRAM+System controller

SPINDLEMOTOR

FOCUSCOIL

SLEDMOTOR

LOADINGMOTOR

33.86MHz

I/F Cable

R-ch

L-ch

Line-out

HOST

TRACKINGCOIL

DiscMotor unit

OpticalPick-up

MOTOR DRIVE

GND

GND

+12V

+5V

GND

GND

+12V

34

BLOCK DIAGRAM

* MODEL: CRD-8484B

PBM00 (MAIN C.B.A)

PBF00 (FRONT C.B.A)

007

002

003

030

020

A02

A01

020

051

028

050

029

434

021

434

434

413413

413

001

413

430

028

027026

025

033435

010

009

008011

012

005034

014

013

434

031

016

015

004

006

431

A B C D E F G H

1

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4

5EXPLODED VIEW

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