LG GDR-8161B Service Manual Download

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INTERNAL STRUCTURE OF THE PICK-UP

1. Structure of the Pick-Up

PICK-UP UNIT

Q001

CN18 VCC
CN06 VC (Vref).
CN05 GND-PD

CN10 A/a
CN09 B/b

CN15 C/c
CN14 D/d
CN17 E1/e2+f2
CN16 E2/e3+f3

CN07 F1/e1+f1
CN08 F2/e4+f4

CN11 CD/DVD SW

CN13 RF+

CN12 RF-

CN19 VR~CD

VR02

VR01

L003

L002

L001

L004

L005

R001

R002

R003

C003

C002

C001

CN20 VR~DVD

CN22 MD
CN21 LD~CD

CN25 LD~DVD

CN23 HFM

CN26 GND-LD

CN01 F+

CN02 F-
CN03 T+

CN04 T-

Alphabet

A~D, E1, E2, F1, F2 -> CD
a~d, e1~ e4, f1~ f4 -> DVD

HFM

DVD= 0V
C D=+5V

Q002

ACTUATOR

Two wavelength
Laser diode

FOCUS

TRACKING

Summary of Contents for GDR-8161B

Page 1: ... 3 9Gbytes side DVD R disc 4 Read compatible for DVD RW Ver 1 0 1 1 DVD RW disc CD ROM 1 21 to 48X max Full CAV data transfer 7 2 Mbytes s max 2 High speed access Random access time 100ms typical 3 CD R CD RW CD Extra CD TEXT disc read compatible 4 Addressing Methode 2 for fixed length Packet supported CD R Orange Book Part2 5 CD DA Digital Audio data output through the IDE bus 6 Embedded error co...

Page 2: ...ta Buffer Capacity 256 kbytes Access Time Random Access DVD 120ms Typical 16X CD 100ms Typical 48X 4 POWER REQUIREMENTS Voltage 5V DC 5 12V DC 10 Ripple 5V 150mVp p 12V 300mVp p Current 12V 300mA Average 1 4A Maximum 5V 100mA Average 0 9A Maximum 5 AUDIO PERFORMANCE Frequency Response 20Hz 20KHz 3dB S N Ratio IHF A 20kHZ LPF 75 dB Typical at 1 KHz 0dB 70 dB Limit at 1 KHz 0dB T H D IHF A 20kHZ LPF...

Page 3: ...r in Connector Attach a power cable from the computer to this connector R O M R O M R O M R O M COMPACT 1 2 4 3 5 6 1 2 5 4 3 FRONT VIEW BACK VIEW 1 Headphone Jack Standard 1 8 3 5mm stereo jack for listening to the audio signal from audio CDs 2 Headphone Volume Control Adjusts the headphone sound level 3 Disc Drawer Accepts a CD ROM DVD ROM disc on its tray 4 Busy Indicator The Busy Indicator lig...

Page 4: ...3 030 020 A02 A01 A03 020 051 028 050 029 434 021 434 434 413 413 413 001 413 430 028 027 026 025 024 435 033 434 010 009 008 011 012 005 034 013 434 017 016 015 004 006 022 021 430 A B C D E F G H 1 2 3 4 5 014 7 8 EXPLODED VIEW ...

Page 5: ...8 F2 e4 f4 CN11 CD DVD SW CN13 RF CN12 RF CN19 VR CD VR02 VR01 L003 L002 L001 L004 L005 R001 R002 R003 C003 C002 C001 4 2 1 3 5 6 7 8 CN20 VR DVD CN22 MD CN21 LD CD CN25 LD DVD CN23 HFM CN26 GND LD CN01 F CN02 F CN03 T CN04 T Alphabet A D E1 E2 F1 F2 CD a d e1 e4 f1 f4 DVD HFM DVD 0V C D 5V Q002 A a B b C c D d E1 f2 e2 E2 f3 e3 F1 f1 e1 F2 f4 ACTUATOR Two wavelength Laser diode FOCUS TRACKING e4 ...

Page 6: ...re of the Pick up SF HD66 is consist of monitor diode for DVD laser and CD laser When DVD laser is ON PG101 20 Pin is need to connect GND for getting monitor voltage PG101 22 pin When CD laser is ON PG101 19 Pin is need to connect GND for getting monitor voltage PG101 22 pin This control is done by handling Q102 Q104 from CD signal IC201 175 pin output ...

Page 7: ... B C D 1 9 x E1 F1 E2 F2 In case of CD Disc This signal is generated in RF AMP IC IC101 and controls the pick up s left and right shift to find the track on CD Disc 3 RF Signal A B C D In case of CD Disc This signal is converted to DATA signal in DSP IC IC201 2 Structure of the Photo Diode CD Infrared laser Pick Up module Photo Diode Tracking Focusing As seen from light receiving side E2 E1 F2 F1 ...

Page 8: ...f A and B Differential phase of C and D In case of DVD Disc This signal is generated in RF AMP IC IC101 and controls the pick up s left and right shift to find the track on DVD Disc 3 RF Signal a b c d In case of DVD Disc This signal is converted to DATA signal in DSP IC IC201 3 Structure of the Photo Diode DVD ROM As seen from light receiving side Red laser Pick Up module Photo Diode Tracking Foc...

Page 9: ...d 1 17 x e1 f1 e2 f2 e3 f3 e4 f4 In case of DVD Disc This signal is generated in RF AMP IC IC101 and controls the pick up s left and right shift to find the track on DVD Disc 3 RF Signal A B C D In case of DVD Disc This signal is converted to DATA signal in DSP IC IC201 4 Structure of the Photo Diode DVD RAM As seen from light receiving side Red laser Pick Up module Photo Diode Tracking Focusing d...

Page 10: ... OF CIRCUIT 1 ALPC Automatic laser power control 1 1 ALPC Circuit Constitution Dual laser power control for DVD and CD are provided The laser ON for DVD or CD can be selected by LDSEL and the lasers ON OFF are controlled by LDOFF Laser power for DVD and CD can be programmable by LDPWR 0 1 ALPC Automatic laser plower control DVD RAM 4 7G about 0 23V DVD RAM 2 6G about 0 18V DVD ROM about 0 18V CD a...

Page 11: ...may feed into IC401 pin 47 and pin 48 2 2 AGC Automatic Gain Control Loop This RF signal is controlled to 0 5 Vpp in VGA The capacitor which is connected in 44 pin is used to control constant level of amplitude The capacitor which is connected in 45 pin is used to control DC offset of FR signal 2 3 Equalizer EQ boost gain is controlled by u com and register BST Fc of EQ is linear by real velocity ...

Page 12: ...B C D FE S curve amplitude is detected from IC201 109 pin and FE gain is controlled by register FEG to keep 1 65V amplitude Center Voltage of FE is about 1 65V Offset adjustment for added FE keep max voltage with jitter min Added offset quantity is programmable by current which feed into IC101 7 pin from IC201 57 pin FE for DVD RAM 2 6G 4 7G is obtained from 4D A B C D or sub spot Sub beam E1 E2 F...

Page 13: ...OCUS OFF about 1 65V 110 20 AS FE Threshold V V1 V V2 V V1 V 8 AS circuit AS All sum signal is obtained from low pass filter and FOK is made from AS signal in IC201 This FOK signal is used to check servo status Threshold is that compare with AS signal to obtain FOK signal Threshold can be made to focus sweep Training in initial read ...

Page 14: ...ial Phase Detect method TE signal is made that add voltage obtain form phase differnece of front spot A D to voltage obtain two phase difference of rear spot B C Final stage amp gain is determined by register TEG and TE signal amplitude is about 1 65Vpp Center voltage of TE signal is about 1 65V Balance of TE signal center voltage 1 65V is decided by current which feed into IC101 6 pin from IC201 ...

Page 15: ...ng error Circuit TE signal for DVD RAM 2 6G 4 7G is programmable by DPP In case of DVD RAM sub spot sub beam is amplified by 1 17times and 1 9times in case of CD and add into main spot main beam The reason of adding sub is that controling offset Offset cancel which is occurred at lens shift Beam adjustment for center voltage 1 65V of TE signal is done by adding TE signal which feed into IC201 111p...

Page 16: ...3 4 LNSC LENS CENTER SIGNAL LNSC Circuit LENSC signal is used as error signal for tracking servo This signal is used only for long seek about 1000 track seek This signal make lens fixed at detector center ...

Page 17: ...litude of AS signal to make FOK 3 Move lens up and down find S curve amplitude of FE 4 Move lens down and up monitor FE voltage If reference voltage about 1 65V FE s curve amplitude 8 close servo loop and focus ON 5 If AS signal is 2ms higher than threshold FOK is H and focus servo is ok When AS is 2ms lower than threshold FOK is L FOK is using only in IC201 not in IC 201 Impossible to FOK signal ...

Page 18: ...o center of detector using LNCS signal TE signal is sampled by A D converter during sequential read and do gain compensation phase compensation in parallel digital compensator This signal is changed to analog signal in D A converter and feed into Drive IC301 from IC201 120 pin and operate tracking actuator Control of stepping motor sled motor is decided by disk and rotation speed and control signa...

Page 19: ...ross Compensator Tracking cross for seek control TKC is digital signal of H L which is compared to TE signal in center of amplitude TKC is used to make constant track cross speed and jumped track count in case of multi jump number of track about less than 1000 track in IC201 27 ...

Page 20: ...ata section CAPA section PID User data section PID 13 PG101 RFP 34 IC101 RFDIF 123 IC202 IDGATE 124 IC202 DTRD 80 IC202 VFOSHORT 31 IC101 ARF 4 About DVD RAM 2 6G 4 7G signal Signal timing for DVD RAM 2 6G 4 7G ...

Page 21: ...is H it feed into IC101 47 48 pin and CD offset is removed For up to readability and RF signal of CAPA is sent to IC201 slicer When IDGATE is L it feed into IC101 47 48 pin and user data RF signal is sent to IC201 slicer DTRD signal This signal is made by RFDiF signal and PLL clock in IC201 This signal is used for read of PID read and user data read timing in IC201 DTRD signal is sent to IC101 and...

Page 22: ...ce EFM demodulator CiRC error correction Audio DAC C3 decoder Buffer Memory controller CSS controller Atapi interface control Data PLL Servo ADC Focus tracking control output Sled control output CAV Spindle control P up Unit IC301 motor drive IC101 AN22020 RF AMP IC201 MN103S37 DSP TE CSO GEN FE GEN FLASH ROM DRAM IC202 ...

Page 23: ...s the regional code and plays title in the case of allowed regional code only 2 Management of DVD Disc for the scrambled of data 1 DVD ROM and DVD player of host generate the KEY 1 respectively transfer to opposite part the KEY 2 is received recognizes the data transfer or not with this value and generates the bus key encoded the data 2 Encoded Disc Key and Title Key host is transfer with the bus ...

Page 24: ...decoder generates the challenge key 10 Byte and transfers to drive The board and drive generate key 1 5Byte with the challenge key respectively Of course the Algorithm generating the key 1 is not known 3 Compare with the generated key 1 if it corresponds each other the first step of authentication is completed This is a course to identify the MPEG 2 decoder with a drive 4 The second step of authen...

Page 25: ...M PLW PNG NZL AUS 4 The disc has the regional code of 8 bit Example The disc manufactured in the U S A has the number one Transfer to MPEG 2 decoder reading the regional code Receiving data from the MPEG 2 decoder and output through the monitor If the board is setting to the regional code 1 for the U S A Check the received regional code to number 1 all or not transfer the data to VGA card in accor...

Page 26: ...RFDIFO 8 POFLT 6 TBAL 18 TEOUT 4 LPCO2 3 LPC2 2 LPCO1 1 LPC1 64 HDTYPE 14 STDI 13 SCK 12 SEN 11 STANBY 10 IDGT 9 61 DTRD GND1 26 GND2 33 GND3 23 GND4 55 VCC1 28 VCC2 36 VCC3 25 VCC4 56 VREF1 27 VREF2 29 VHALF 44 AGCG 45 AGCO 39 OFTR 40 30 BDO DFLTON 31 DFLTOP 32 DCFLT 41 RFENV 43 PEAK 47 RFINP 48 RFINN 46 TESTSG 5 VFOSHORT 38 DCRF 35 RFOUT 22 FEOUT 7 FBAL 20 ASOUT Mirror Det Cont LPC AMP VGA EQ AG...

Page 27: ...ifier inverted output 31 DFLTOP Filter amplifier positige output 32 DCFLT Filter output capacitance connection No Function 33 GND3 Ground 3 34 RFDIFO Radial differential output 35 RFOUT RF full addition amplifier output 36 VCC3 Power supply 3 3 3V 37 N C 38 DCRF DC cut filter of RF full addition amplifier 39 OFTR OFTR output 40 BDO BDO output 41 RFENV RF envelope output 42 N C 43 PEAK Peak envelop...

Page 28: ...NALOG DVD ROM CD PRE DMA I F ECC HOST I F ATAPI DMA BCU 32Bit CPU core Command Memory 96 kbyte CGEN SERVO IO SERVO RAM CIRC WDT General purpose IO Bus High Speed IO bus SYSTEM I F INTC General I O Serial I F MODE DRAMC OnChip Debug 2Mbit DRAM Formatter ...

Page 29: ... A 0 1 4 3 1 4 2 N P D I A G 1 4 1 D A 0 N I O C S 1 6 1 4 0 1 3 9 I N T R Q 1 3 8 N D M A C K 1 3 7 N I O R D I O R D Y 1 3 6 V S S 1 3 5 V D D 3 1 3 4 8 8 4 5 4 6 4 7 4 8 4 9 5 0 5 1 5 2 5 3 5 4 5 5 5 6 5 7 5 8 5 9 6 0 6 1 6 2 6 3 6 4 6 5 6 6 6 7 6 8 6 9 7 0 7 1 7 2 7 3 7 4 7 5 7 6 7 7 7 8 7 9 8 0 8 1 8 2 8 3 8 4 8 5 8 6 8 7 N I O W R 3 4 5 6 7 8 9 10 P2 EXINT0 P3 EXINT1 NTRYCL MONI7 131 NEJECT ...

Page 30: ...FLASH address out 15 FADR14 O toFLASH FLASH address out 16 NWE O toFLASH FLASH Write signal out 17 FADR16 O toFLASH FLASH address out 18 FADR15 O toFLASH FLASH address out 19 DRAMVDD15 Power DRAM VDD 1 5V 20 DRAMVSS GND DRAM VSS 21 VSS GND VSS 22 FADR12 O toFLASH FLASH address out 23 FADR7 O toFLASH FLASH address out 24 FADR6 O toFLASH FLASH address out 25 FADR5 O toFLASH FLASH address out 26 FADR...

Page 31: ...O X tal OSC output 16 9344MHz 54 VSS GND VSS 55 DRV0 I O toDRIVEIC Traverse drive out General port 56 DRV1 I O toDRIVEIC Spindle drive output 57 DRV2 I O toFEP Focus Balance ADJ output 58 DRV3 I O toFEP Tracking balance ADJ output 59 DRV4 I O General purpose port 60 DRV5 I O General purpose port 61 DRV6 I O General purpose port 62 DRV7 I O General purpose port 63 VSS GND VSS 64 DRV8 I O General pu...

Page 32: ...PDET condenser 93 RFDIF I CPDET RF input 94 AVSSC GND Analog VSS 95 PLFLT2 I PLL condenser 2 96 PLFLT1 I PLL condenser 1 97 AVSSB GND Analog VSS 98 ARF I fromFEP Equivalent RF input 99 NARF I fromFEP Equivalent RF input 100 VHALF I fromFEP Reference voltage 1 65V input 101 RVI I VREFH reference current resistor 102 VREFH I fromFEP Reference voltage 2 2V input 103 DSLF2 I DSL condenser 2 104 DSLF1 ...

Page 33: ...ternal interrupt Internal monitor signal 132 NTRYCL MONI7 I O External interrupt Internal monitor signal 133 DMARQ O toHOST ATAPI DMA request to Host 134 NIOWR I O toHOST ATAPI Host write signal input 135 VDD3 Power VDD 3 3V 136 VSS GND VSS 137 NIORD I O toHOST ATAPI host read signal input 138 IORDY O toHOST ATAPI ready out to Host 139 NDMACK I toHOST ATAPI Host DMA acknolege 140 INTRQ O toHOST AT...

Page 34: ...2 HDD11 I O toHOST ATAPI data output 163 HDD4 I O toHOST ATAPI data output 164 HDD10 I O toHOST ATAPI data output 165 HDD5 I O toHOST ATAPI data output 166 VSS GND VSS 167 VDD3 Power VDD 3 3V 168 HDD9 I O toHOST ATAPI data output 169 HDD6 I O toHOST ATAPI data output 170 HDD8 I O toHOST ATAPI data output 171 HDD7 I O toHOST ATAPI data output 172 VDDH Power 5V Reference 173 NRESET I toHOST ATAPI re...

Page 35: ...ide current sense 1 9 SL1 Slide non inverted output 1 10 SL1 Slide inverted output 1 11 GND GND 12 W Motor drive output W 13 V Motor drive output V 14 U Motor drive output U 15 RSP Spindle current sense 16 HW HW sensor amp input 17 HW HW sensor amp input 18 HV HV sensor amp input 19 HV HV sensor amp input 20 HU HU sensor amp input 21 HU HU sensor amp input Terminal SYMBOL TERMINAL FUNCTION 22 VM1 ...

Page 36: ...o Power OFF closed STOP OFF Power ON no disc Drive Initialize ON LED doesn t light up Pick up slide to TOC area Disc search ON Pick up not slide Power save mode OFF OFF Push Eject button Disc tray OPEN BLINK Open Tray open close doesn t work Waiting close OFF Opened Set disc Push Eject button Disc tray CLOSE BLINK Close Pick up slide to TOC area ON Closed Disc search with disc ON Check disc media ...

Page 37: ...ng a nearby circuit LED doesn t light up NG OK IC501 3 3VD power short NG IC502 Vo 1 5V OK IC502 1 5V power short NG IC201 2 3 3V pulse output at power on OK IC201 2 PG401 8 PG402 8 Q461 LED R480 OK OK X201 oscillating NG X201 IC201 IC201 IC202 NG u COM 2 8 8 IC201 PG402 Q461 LD461 or LD462 R480 5V LED 3 3VD 3 3VA 1 5V 53 54 55 56 6 5 Vo IC501 5V 1 5V 3 3VA 3 3VD IC502 PG701 PG401 0 5 s div LD461 ...

Page 38: ...ck parts and soldering including a nearty circuit When two or more pin numbers are indicated by the party check signal line including a nearby circuit When a power supply is switched on Pick up not slide OK NG NG IC301 38 IC201 59 IC301 41 IC201 60 IC201 Check waveform IC301 38 IC301 42 OK NG IC301 25 IC101 29 IC101 IC301 25 1 65V OK NG IC302 3 L301 PG701 56 IC301 IC302 3 12V NG OK 53 54 55 56 6 5...

Page 39: ... IC301 10 10 V div DC IC301 25 2 V div DC IC301 41 2 V div DC IC301 38 2 V div DC PG701 53 2 V div DC IC301 25 2 V div DC IC301 41 2 V div DC IC301 38 2 V div DC PG701 53 2 V div DC IC301 9 10 V div DC IC301 1 2 V div DC PG701 53 2 V div DC IC301 10 10 V div DC IC301 9 10 V div DC IC301 1 2 V div DC PG701 53 2 V div DC zoom ...

Page 40: ...v DC IC301 2 1 V div DC PG701 53 5 V div DC IC301 41 5 V div DC IC301 1 1 V div DC IC301 2 1 V div DC Zoom REF 6 Zoom REF 5 Zoom REF 8 Zoom REF 7 PG701 53 5 V div DC IC301 41 5 V div DC IC301 1 1 V div DC IC301 2 1 V div DC PG701 53 5 V div DC IC301 41 5 V div DC IC301 1 1 V div DC IC301 2 1 V div DC PG701 53 5 V div DC IC301 41 5 V div DC IC301 1 1 V div DC IC301 2 1 V div DC PG701 53 5 V div DC ...

Page 41: ...y circuit NG OK S401 S401 PG402 9 PG401 9 IC201 132 S401 PG402 10 PG401 10 IC201 176 Push S401 then IC201 132 or 176 Low 0V NG OK IC301 38 IC201 59 IC301 41 IC201 60 IC301 40 IC201 65 IC201 Check wave form IC301 38 IC301 41 IC301 40 NG OK IC101 29 IC301 25 IC101 IC301 25 1 65V NG OK IC301 Check wave form IC301 36 IC301 37 NG OK IC301 36 PG401 11 PG402 11 PG403 1 IC301 37 PG401 12 PG402 12 PG403 2 ...

Page 42: ... 10 9 12 11 12 11 M CTL1 CTL2 EJECT LDIN LDOUT LMP LMN main PWB sub PWB PG401 PG402 PG401 PG402 S401 S701 53 54 55 56 6 5 Vo IC501 5V 1 5V 3 3VA 3 3VD IC502 PG701 12V LMC 1s div IC201 131 5V div DC IC301 40 5V div DC PG403 1 5V div DC PG403 2 5V div DC IC201 131 5V div DC IC301 40 5V div DC IC201 132 5V div DC IC201 176 5V div DC 1s div ...

Page 43: ...top immediately after it rotated Check waveform IC201 75 Note When the circuit number is written check parts and soldering including a nearby circuit When two or more pin numbers are indicated by the party check signal line including a nearby circuit OK IC201 Check item OK Check waveform IC301 24 IC201 75 IC301 24 OK OK PG301 8 about 5V PG301 8 PG701 53 NG PG301 7 V PG301 7 IC301 23 IC301 NG check...

Page 44: ...5 56 6 5 Vo IC501 5V 1 5V 3 3VA 3 3VD IC502 PG701 12V SPD 3phase Driver 14 3phase control Servo control 24 SFG 16 21 23 13 6 1 PG301 W V U R307 3 3VD R292 5 ms div IC301 12 10V div DC IC301 13 10V div DC IC301 14 10V div DC IC301 24 5V div DC IC301 24 5V div DC IC301 20 200mV div AC IC301 21 200mV div AC IC301 26 2V div DC 5 ms div ...

Page 45: ...de Check item NO Check waveform IC101 18 IC101 Pickup unit NG OK OK YES OK Check waveform IC301 28 IC101 18 IC201 111 IC201 120 IC301 28 IC201 NG Check waveform PG101 3 PG101 4 IC301 30 PG101 3 IC301 31 PG101 4 PG101 connection IC301 NG OK Check waveform IC201 98 IC201 99 IC201 OK NG NG Check waveform IC101 31 IC101 30 IC101 31 IC201 98 IC101 30 IC201 99 OK check waveform IC101 57 IC101 58 IC101 5...

Page 46: ...8 47 12 13 12 13 Photo detector Pickup unit PG101 ARF 30 NARF 98 99 DSL C D 400 us div 1 us div 1 us div 1 us div 1 us div IC101 18 2 V div DC IC301 28 2 V div DC IC301 31 5 V div DC IC301 30 5 V div DC IC101 57 2 V div DC IC101 60 2 V div DC IC101 59 5 V div DC IC101 58 5 V div DC IC101 47 2 V div DC IC101 48 2 V div DC IC201 98 2 V div DC IC201 99 2 V div DC IC101 18 500 mV div AC IC301 28 500 m...

Page 47: ...nearby circuit go to A A Check item go to B Check item Check item NO NO IC101 1 0 2V PG101 connection FFC cable to Pick up PG101 connection FFC cable to Pick up Pick up unit Q101 IC101 2 Q101 PG101 25 YES YES IC101 2 3 6V NO 5V power line NO IC101 28 5V IC101 55 5V YES 3 3VA power line IC501 IC101 IC201 PG101 connection FFC cable to Pick up PG101 connection FFC cable to Pick up Pick up unit NO IC1...

Page 48: ...dering check IC101 12 IC201 70 IC101 13 IC201 68 IC101 14 IC201 69 YES OK 5V 14 u COM IC201 1 5V 3 3VA 3 3VD 53 54 55 56 6 5 Vo IC501 5V 1 5V 3 3VA 3 3VD IC502 PG701 12V IC101 5V 3 3VA 68 70 69 13 12 Serial BUS control HFM CD DVD detector switch 1 4 3 DVD LASER power control CD LASER power control Q110 25 21 Q102 Q104 Q101 22 11 20 19 23 2 175 7 5V 5V Pick up unit PG101 CD HFM ...

Page 49: ...rm IC201 109 LASER power OK YES Check waveform IC101 22 IC101 22 IC201 109 OK NG Check waveform IC101 57 IC101 58 IC101 59 IC101 60 IC101 power IC101 PG101 connection Pick up OK NG NG D Focus drive check Check item PG101 1 IC301 34 PG101 2 IC301 35 PG101 connection PG101 FFC cable of Pick up Pick up unit IC301 38 IC201 59 IC301 41 IC201 60 IC201 OK NG Check waveform IC301 34 IC301 35 Check wavefor...

Page 50: ... 5V 3 3VA VHALF 29 FE Gen 22 Focus servo A B C D FOP FON A B C D 34 35 57 60 59 58 10 9 15 14 1 2 10 9 15 14 1 2 Photo detector Focus actuater Pickup unit PG101 FE 400 us div 400 us div IC201 109 2 V div DC IC201 119 2 V div DC IC301 34 2 V div DC IC301 35 2 V div DC IC201 109 500 mV div AC IC201 119 500 mV div AC IC301 34 500 mV div AC IC301 35 500 mV div AC ...

Page 51: ...heck item NO Play Audio CD with CD player software LED blinking IC201 NG YES check waveform IC201 85 IC201 86 IC201 1 Q402 PG401 2 Q401 IC201 YES OK PG402 2 about 0V IC201 85 PG701 46 IC201 86 PG701 43 PG701 46 PG402 6 PG701 43 PG402 3 NG NO check waveform PG701 46 PG701 43 PG402 6 IC451 5 PG402 3 IC451 3 RV451 C451 C452 R453 R454 NG OK check waveform PG402 6 PG402 3 NG OK check waveform IC451 5 I...

Page 52: ...sor Spindle motor Drive AGC AN22020 RF Amplifier HOST COMPUTER Spindle motor Optical Pick up Slide motor SF HD66A DVD PLL DVD SERVO DSP Decoder CSS ATAPI Interface Equalizer APC CD PLL CD SERVO DSP MN103S37 DSP interface Flash ROM 256kB Flash Rom DRAM 256kB System Control Micom Loading motor Drive Media IC101 IC202 IC301 IC201 ...

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