LG GDR-8162B Service Manual Download

Page: 40 / 55

•

5V power short

•

PC power cable

•

PC power supply

CN701(43)-(44) : 5V?

IC501(5) : 3.3V?

Check item

Note : When circuit number is written, check parts and soldering

including a nearby circuit.
When two or more pin mumbers are indicated by the party,
check signal-line including a nearby circuit.

LED doesn’t light up

•

IC501

•

3.3VD power short

IC502(Vo) : 1.5V?

•

IC502

•

1.5V power short

IC201(2) 3.3V-pulse output?

(at power-on)

•

IC201(2) - CN401(8) - CN402(8) - Q461 - LED -

R480

X201 oscillating?

•

X201

•

IC201

•

IC201

•

IC202

u-COM

IC201

CN402

Q461

LED1
or
LED2

R480

LED

3.3VD 3.3VA 1.5V

IC501

1.5V

3.3VA

3.3VD

IC502

CN701

CN401

0.5 s/div

LED1-R480 : 2V/div DC

IC201 (2) : 2V/div DC

CN701 (44) : 2V/div DC

Power on

Summary of Contents for GDR-8162B

Page 1: ...DVD ROM DRIVE SERVICE MANUAL MODEL GDR 8162B P NO 3828HS1038E June 2003 Printed in Korea website http biz LGEservice com e mail http www LGEservice com techsup html MODEL GDR 8162B ...

Page 2: ...o Diode DVD RAM 17 DESCRIPTION OF CIRCUIT 18 29 1 ALPC Automatic Laser Power Control 18 2 RF Amplifier Circuit 19 3 Servo Signal 20 4 About DVD RAM 2 6G 4 7G Signal 28 DESCRIPTION OF DATA PROCESSING 30 33 1 Data Processing Flow 30 2 Copy Protection and Regional Code Management Block 31 3 About Prevention the DVD ROM from to be copy 32 4 About the DVD ROM Regional Code 33 MAJOR IC INTERNAL BLOCK DI...

Page 3: ... 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 correction EDC ECC for ...

Page 4: ...dio 1 2 Mbytes s max Data 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 120mVp p 12V 120mVp p Current 12V 900mA Average 1 35A Maximum 5V 600mA 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 0...

Page 5: ...e DVD ROM Drive and your PC 5 Power 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 1 2 5 4 3 FRONT VIEW BACK VIEW 1 Disc Drawer Accepts a CD ROM DVD ROM disc on its tray 2 Busy Indicator The Busy Indicator lights during initialization and data read operations 3 Emergency Eject Hole Insert a paper clip here to eject the drawer manually ...

Page 6: ...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 Main Circuit Board D At this time be careful not to damage the 3 connectors of the Main Circuit Board 2 MECHANISM ASSY 2 1 Base Pick Unit Assy A Separate the Base Pick Up Unit Assy from the MechanismAssy B Release 2 screws C and 1hoo...

Page 7: ...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 8: ...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 9: ...re of the Pick up SF HD67 is consist of monitor diode for DVD laser and CD laser When DVD laser is ON CN101 20 Pin is need to connect GND for getting monitor voltage CN101 22 pin When CD laser is ON CN101 19 Pin is need to connect GND for getting monitor voltage CN101 22 pin This control is done by handling Q102 Q104 from CD signal IC201 175 pin output ...

Page 10: ... 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 11: ...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 12: ...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 13: ... 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 14: ...may feed into IC101 pin 34 and pin 35 2 2 AGC Automatic Gain Control Loop This RF signal is controlled to 0 5 Vpp in VGA The capacitor which is connected in 31 pin is used to control constant level of amplitude The capacitor which is connected in 32 pin is used to control DC offset of RF signal 2 3 Equalizer EQ boost gain is controlled by u com and register BST Fc of EQ is linear by real velocity ...

Page 15: ...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 16: ...OCUS OFF about 1 65V 110 16 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 17: ...OM is made by DPD Differential 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 is 1 65V Adjustment is operated by monit...

Page 18: ...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 19: ...47 RFDiF 3 4 LNSC LENS CENTER SIGNAL LNSC Circuit RFDiF 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 20: ...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 21: ...center of detector using RFDiF 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 s...

Page 22: ...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 23: ...ata section CAPA section PID User data section PID 13 PG101 RFP 20 IC101 RFDIF 123 IC201 IDGATE 124 IC201 DTRD 80 IC202 VFOSHORT 24 IC101 ARF 4 About DVD RAM 2 6G 4 7G signal Signal timing for DVD RAM 2 6G 4 7G ...

Page 24: ...is H it feed into IC101 34 35 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 34 35 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 25: ...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 AN22022 RF AMP IC201 MN103S71 DSP TE CSO GEN FE GEN FLASH ROM DRAM IC202 ...

Page 26: ...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 27: ...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 28: ...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 29: ... VIN3 47 13 VIN4 JLINE 20 RFDIF0 14 TEOUT 5 LPCO2 4 LPC2 3 LPCO1 2 LPC1 12 STDI 11 SCK 10 SEN 9 IDGT 8 19 DTRD GND1 15 GND3 45 VCC1 38 VCC2 41 VCC3 42 VREF1 22 VREF2 17 VHALF 31 AGCG 32 AGCO 27 OFTR 28 23 BDO DFLTON 24 DFLTOP 21 DCFLT 29 RFENV 30 PEAK 34 RFINP 35 RFINN 33 TESTSG 6 26 DCRF 25 RFOUT 18 FEOUT 7 FBAL 16 ASOUT Mirror Det Cont LPC AMP VGA EQ AGC Cont Vel Adj HOLD Level Cont OFTR Det BDO...

Page 30: ...N Filter amplifier inverted output 24 DFLTOP Filter amplifier positive output No Function 25 RFOUT RF full addition amplifier output 26 DCRF DC cut filter of RF full addition amplifier 27 OFTR OFTR output 28 BDO BDO output 29 RFENV RF envelope output 30 PEAK Peak envelope detection filter 31 AGCG AGC amplifier gain control 32 AGCO AGC amplifier level control 33 TEST SG TEST signal input 34 RFINP R...

Page 31: ...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 32: ... 4 4 D 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 P3 NTRYCL MONI7 131 NEJECT MONI6 13...

Page 33: ...SH 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 FADR4 O toFLASH FLASH address out 27 FA...

Page 34: ...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 35: ...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 36: ...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 37: ...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 38: ...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 39: ...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 40: ...ing 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 CN401 8 CN402 8 Q461 LED R480 OK OK X201 oscillating NG X201 IC201 IC201 IC202 NG u COM 2 8 8 IC201 CN402 Q461 LED1 or LED2 R480 5V LED 3 3VD 3 3VA 1 5V 44 43 42 41 6 5 Vo IC501 5V 1 5V 3 3VA 3 3VD IC502 CN701 CN401 0 5 s div LED1 R4...

Page 41: ...check 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 17 IC101 IC301 25 1 65V OK NG IC301 3 CN701 41 IC301 IC301 3 12V NG OK 44 43 42 41 6 5 V...

Page 42: ... IC301 10 10 V div DC IC301 25 2 V div DC IC301 41 2 V div DC IC301 38 2 V div DC CN701 44 2 V div DC IC301 25 2 V div DC IC301 41 2 V div DC IC301 38 2 V div DC CN701 44 2 V div DC IC301 9 10 V div DC IC301 1 2 V div DC CN701 44 2 V div DC IC301 10 10 V div DC IC301 9 10 V div DC IC301 1 2 V div DC CN701 44 2 V div DC zoom ...

Page 43: ...v DC IC301 2 1 V div DC CN701 44 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 CN701 44 5 V div DC IC301 41 5 V div DC IC301 1 1 V div DC IC301 2 1 V div DC CN701 44 5 V div DC IC301 41 5 V div DC IC301 1 1 V div DC IC301 2 1 V div DC CN701 44 5 V div DC IC301 41 5 V div DC IC301 1 1 V div DC IC301 2 1 V div DC CN701 44 5 V div DC ...

Page 44: ... NG OK SW401 SW401 CN402 9 CN401 9 IC201 132 SW401 CN402 10 CN401 10 IC201 176 Push SW401 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 17 IC301 25 IC101 IC301 25 1 65V NG OK IC301 Check wave form IC301 36 IC301 37 NG OK IC301 36 CN401 11 CN402 11 CN402 12 IC301 37 CN401 12 CN402 12 CN402 11 Che...

Page 45: ...2 1 10 9 12 11 12 11 M CTL1 CTL2 EJECT LDIN LDOUT LMP LMN main PWB sub PWB CN401 CN402 CN401 CN402 SW401 SW701 44 43 42 41 6 5 Vo IC501 5V 1 5V 3 3VA 3 3VD IC502 CN701 12V LMC 1s div IC201 131 5V div DC IC301 40 5V div DC TM403 2 5V div DC TM403 1 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 46: ...p 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 CN301 8 about 5V CN301 8 PG701 53 NG PG301 7 V CN301 7 IC301 23 IC301 NG check w...

Page 47: ...6 5 Vo IC501 5V 1 5V 3 3VA 3 3VD IC502 CN701 12V SPD 3phase Driver 14 3phase control Servo control 24 SFG 16 21 23 13 6 1 CN301 Spindle M 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 48: ...de Check item NO Check waveform IC101 14 IC101 Pickup unit NG OK OK YES OK Check waveform IC301 28 IC101 14 IC201 111 IC201 120 IC301 28 IC201 NG Check waveform CN101 3 CN101 4 IC301 30 CN101 3 IC301 31 CN101 4 CN101 connection IC301 NG OK Check waveform IC201 98 IC201 99 IC201 OK NG NG Check waveform IC101 24 IC101 23 IC101 24 IC201 98 IC101 23 IC201 99 OK check waveform IC101 43 IC101 44 IC101 4...

Page 49: ...5 34 12 13 12 13 Photo detector Pickup unit PG101 ARF 23 NARF 98 99 DSL C D 400 us div 1 us div 1 us div 1 us div 1 us div IC101 14 2 V div DC IC301 28 2 V div DC IC301 31 5 V div DC IC301 30 5 V div DC IC101 43 2 V div DC IC101 47 2 V div DC IC101 46 5 V div DC IC101 44 5 V div DC IC101 34 2 V div DC IC101 35 2 V div DC IC201 98 2 V div DC IC201 99 2 V div DC IC101 14 500 mV div AC IC301 28 500 m...

Page 50: ...ding a nearby circuit go to A A Check item go to B Check item Check item NO NO IC101 2 0 2V CN101 connection FFC cable to Pick up CN101 connection FFC cable to Pick up Pick up unit Q101 IC101 3 Q101 CN101 25 YES YES IC101 3 3 6V NO 5V power line NO IC101 38 5V IC101 45 5V YES 3 3VA power line IC501 IC101 IC201 CN101 connection FFC cable to Pick up CN101 connection FFC cable to Pick up Pick up unit...

Page 51: ...g check IC101 10 IC201 70 IC101 11 IC201 68 IC101 12 IC201 69 YES OK 5V 14 u COM IC201 1 5V 3 3VA 3 3VD 44 43 42 41 6 5 Vo IC501 5V 1 5V 3 3VA 3 3VD IC502 CN701 12V IC101 5V 3 3VA 68 70 69 13 12 Serial BUS control HFM CD DVD detector switch 2 5 4 DVD LASER power control CD LASER power control Q110 25 21 Q102 Q101 22 11 20 19 23 3 175 7 5V 5V Pick up unit CN101 CD HFM ...

Page 52: ...rm IC201 109 LASER power OK YES Check waveform IC101 18 IC101 18 IC201 109 OK NG Check waveform IC101 43 IC101 44 IC101 46 IC101 47 IC101 power IC101 CN101 connection Pick up OK NG NG D Focus drive check Check item CN101 1 IC301 34 CN101 2 IC301 35 CN101 connection CN101 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 53: ... 5V 3 3VA VHALF 17 FE Gen 18 Focus servo A B C D FOP FON A B C D 34 35 43 47 46 44 10 9 15 14 1 2 10 9 15 14 1 2 Photo detector Focus actuater Pickup unit CN301 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 54: ... player software LED blinking IC201 NG YES check waveform IC201 85 IC201 86 IC201 1 Q402 CN401 2 Q401 IC201 YES OK CN402 2 about 0V IC201 85 CN701 46 IC201 86 CN701 43 CN701 46 CN402 6 CN701 43 CN402 3 NG NO check waveform CN701 46 CN701 43 CN402 6 IC451 5 CN402 3 IC451 3 RV451 C451 C452 R453 R454 NG OK check waveform CN402 6 CN402 3 NG OK check waveform IC451 5 IC451 3 IC451 8 R460 CN402 7 CN401 ...

Page 55: ...Signal Processor Spindle motor Drive AGC AN22022A RF Amplifier HOST COMPUTER Spindle motor Optical Pick up Slide motor SF HD67 DVD PLL DVD SERVO DSP Decoder CSS ATAPI Interface Equalizer APC CD PLL CD SERVO DSP MN103S71F DSP interface SST39SF020A 256kB Flash Rom DRAM 256kB System Control Micom Loading motor Drive ...

Search results

Summary of Contents for GDR-8162B

Reviews:

Related manuals for GDR-8162B

Brands by name

Popular brands

LG GDR-8162B, Service Manual

Search results

Summary of Contents for GDR-8162B

Reviews:

Related manuals for GDR-8162B

Brands by name

Popular brands