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LG XC-U62X (XCS62F), Service Manual

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LG XC-U62X (XCS62F) Service Manual Download Page 40

PS9829B

PS9829B

PWM

PWM

MODU

MODULATOR

TOR

PS9829B

PS9829B

PWM

PWM

MODU

MODULATOR

TOR

TAS5142

TAS5142

Power Amp

Power Amp

TAS5142

TAS5142

Power Amp

Power Amp

FR

FR

FL

FL

FL

FL+/ -,

-,  FR+

 FR+/-

/-

AM

AMP 

P BOARD

MA

MAIN 

N BOARD

OARD

NEC

NEC

AU

AUDIO

DIO

MI

MICOM

COM

NEC

NEC

AU

AUDIO

DIO

MI

MICOM

COM

12.

12.288 

288 MHz

9.

9.8304 

8304  MHz

9829

9829_RESET

ESET

9829_CLK

9829_CLK

9829

9829_DA

_DAT

TA

TAS5142

S5142_PDN

DN

TA

TAS5142

S5142_SD

HA1227

HA1227

TAP

TAPE I IC

REC MUTE

P/B MUTE

REC BIAS

DECK

MD

DECK/ HD

TUNER 

TUNER 

MODULE

MODULE

PLL 

PLL DAT.CLK

DAT.CLK

RDS 

RDS 
DATA.CLK

DATA.CLK

BU4052

BU4052

TAP

TAPE L/R

E L/R

TUN

TUNER L/

L/R

AUX 

AUX L/ R

OP 

OP AMP

MP

AK535

AK5358

OP 

OP AMP

MP

LEVEL

LEVEL METE

TER

RE

REC L/R

L/R

AK5358 R

AK5358 REST

ST

CD 

CD DATA.CL

ATA.CLK

PO

PORT  INPUT

RT  INPUT

AUX 

AUX INP

INPUT

HE

HEAD PHONE

HONES

BU40

BU4052

52 DATA

USB

USB DA+.-.

DA+.-. 5V

CD DATA.CLK

AK5358 

AK5358 

CLK

CLK.DA

DATA

TA

H/P_SW

H/P_SW 

PW

PWM 

M OUT

OUT

CD 

CD 

SANYO

SANYO

LC786

LC78692N

92NW

FLD (DISPLAY)

VFD 

VFD DR

DRIVE

IVE IC

PT632

PT6324

XC102 : 2 CH (50W X 2Ch)

W/O DECK

XC62 : 2 CH (30W X 2Ch )

W /SINGLE DECK

LEVEL SHIFT IC

VEL SHIFT IC

74

74VHCT244

44

R

L

PORT 

PORT L/R

/R

SOL 

"

B

"

MOTOR

MODE B

HALF B

P/B

P/B L/R

 L/R

RE

REC L/R

L/R

XC

XC62

62 ON

 ONLY

3-28

3-29

2. MAIN & FRONT BLOCK DIAGRAM

Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes

LGE Internal Use Only

Summary of Contents for XC-U62X (XCS62F)

Page 1: ...ELS XC62 A0U XC62 XC U62X XCS62F CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL MODELS XC62 A0U XC62 XC U62X XCS62F SERVICE MANUAL P NO AFN35036923 AUGUST 2007 Website http biz lgservice com Internal Use Only ...

Page 2: ...K 3 15 INTERNAL BLOCK DIAGRAM OF ICs 3 15 1 AK5358 3 16 2 BU4052 3 16 3 HA12237F 3 17 4 LC78692NW 3 18 5 PS9829B 3 18 6 PT6324 3 19 7 STR W6253 3 19 8 TAS5142 3 20 9 U1739EJ2V1UD00 KF2_E 3 21 10 UTC MC4580 3 22 WIRING DIAGRAM 3 24 BLOCK DIAGRAM 3 26 1 SMPS BLOCK DIAGRAM 3 26 2 MAIN FRONT BLOCK DIAGRAM 3 28 SCHEMATIC DIAGRAMS 3 30 1 SMPS SCHEMATIC DIAGRAM 3 30 2 MAIN SCHEMATIC DIAGRAM 3 32 3 AMP SC...

Page 3: ...sted to a high degree of precision and for that reason the adjustment point and installation screws should absolutely never be touched 4 Laser beams may damage the eyes Absolutely never permit laser beams to enter the eyes Also NEVER switch ON the power to the laser output part lens etc of the pick up if it is damaged 5 Cleaning the lens surface If there is dust on the lens surface the dust should...

Page 4: ...ench should be covered with a conductive sheet and grounded When removing the laser pick up from its conductive bag do not place the pick up on the bag This is because there is the possibility of damage by static electricity 4 To prevent AC leakage the metal part of the soldering iron should be grounded 5 Workers should be grounded by an armband 1MΩ 6 Care should be taken not to permit the laser p...

Page 5: ...s not classified as anti static can generate electrical charges sufficient to damage ESD devices 5 Do not use freon propelled chemicals These can generate electrical charges sufficient to damage ESD devices 6 Do not remove a replacement ESD device from its protective package until immediately before you are ready to install it Most replacement ESD devices are packaged with leads electrically short...

Page 6: ...AY PAUSE 4 CD SKIP SEARCH FAST REWIND PLAY TUNE 5 PORT IN jack Headphone jack ø3 5mm 6 FUNCTION FM AM CD USB AUX PORTABLE TAPE XDSS plus PLAY MODE ST MONO CD SYNC CD OPEN DEMO 7 PUSH EJECT position 8 USB connector 9 CD SKIP SEARCH FAST FORWARD PLAY TUNE 10 VOLUME CONTROL KNOB 11 STOP 12 TIMER CLOCK SET RDS OPTIONAL 13 DISC TRAY 14 AM FM ANTENNA TERMINAL 15 AUX IN AUXILIARY INPUT connector 16 POWER...

Page 7: ... PLAY PAUSE CD STOP CD SKIP SEARCH TUN REPEAT D SKIP XTS Pro XDSS plus EQ master RDS Radio Data System FUNCTION RDS OPTIONAL PTY OPTIONAL PTY SEARCH OPTIONAL DIMMER MUTE USB FUNCTION VOLUME CLOCK PROGRAM MEMO TAPE FUNCTION BACKWARD PLAY FORWARD PLAY FAST REWIND PLAY FAST FORWARD PLAY RECORD RECORD PAUSE TAPE STOP RANDOM MP3 Info MP3 WMA file information display NUMERIC ...

Page 8: ...kHz Intermediate Frequency 450kHz Signal to Noise Ratio 30dB Frequency Response 140 1800Hz AMPLIFIER Output Power 30W 30W T H D 0 5 Frequency Response 40 20000Hz Signal to noise ratio 75dB CD Frequency response 40 20000Hz Signal to noise ratio 75dB Dynamic range 75dB CASSETTE TAPE PLAYER Tape Speed 3000 3 MTT 111 NORMAL SPEED Wow Flutter 0 25 MTT 111 JIS WTD F F REW Time 120sec C 60 Frequency Resp...

Page 9: ...1 8 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only MEMO ...

Page 10: ...Internal Use Only A C D H I A B K E J F L B C E G L D F H I J K G 454 A26 A46 264 263 266 257 258 A43 250 254 252 253 255 259 454 A47 CN2 CN1 305 454 454 454 A00 267 290 256 A52 CD SMPS FRONT MAIN CABLE3 CABLE2 CABLE1 CN201 454 290 454 454 454 2 1 2 2 SECTION 2 EXPLODED VIEWS CABINET EXPLODED VIEW ...

Page 11: ...tronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 2 3 2 4 TAPE DECK MECHANISM SINGLE DECK EXPLODED VIEW 006 A00 018 017 019 020 022 A01 015 037 011 009 009 003 007 001 023 025 A02 EV ...

Page 12: ...c All right reserved Only for training and service purposes LGE Internal Use Only 2 5 2 6 A26 439 014 013 017 015 431 016 026 A03 019 012 036 432 012A 020 003 002 001 A01 018 A02 010 012A 432 037 012 CD MECHANISM CDM 330 EXPLODED VIEW ...

Page 13: ...LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 2 7 2 8 852 850R A81 A80R 853R WIRE80 851 854 A80 A80L WIRE80 854 850L 852 851 853L SPEAKER EXPLODED VIEW MODEL XCS62F ...

Page 14: ... Inc All right reserved Only for training and service purposes LGE Internal Use Only PACKING ACCESSORY VIEW 808 Battery 900 Remote Control 801 Instruction Ass y 803 Packing 803 Packing 804 Bag 802 Box 825 Antenna FM 824 Antenna Loop AM ...

Page 15: ...e TH101 normal Replace the R101 YES NO Is Vcc 9V 18V supplied to IC101 Pin2 Is the D102 normal YES NO NO Is there about 2 5V at the IC103 Pin1 Replace the IC103 NO Check or Replace the D102 IS the D959 normal Replace the D959 YES NO YES Is the IC102 normal Replace the IC102 YES NO Is the D947 normal Replace the D947 YES NO Is the D949 normal Replace the D949 YES NO Is the D940 normal Replace the D...

Page 16: ... H Check the CD CTL H signal from µ com YES NO Check or Replace the IC957 No 3 3V Is the Vcc 4 2V supplied to IC955 pin1 Check or Replace the D943 YES YES NO Is the IC955 pin4 H Check the P CTL H signal from µ com YES NO Check or Replace the IC955 No 12V Is the Vcc 13 5V supplied to IC947 pin1 Check or Replace the D940 YES YES NO Is the IC947 pin4 H Check the P CTL H signal from µ com YES NO Check...

Page 17: ...vice purposes LGE Internal Use Only No 12V Is the voltage 0f C932 13V Check or Replace the D970 YES YES NO Is the IC155 pin2 12V Check the PWR CTL H signal from µ com YES NO Check or Replace the Q942 No VF Is the ZD950 Normal Replace the ZD950 YES YES NO Replace the R993 or Q950 Q943 ...

Page 18: ...S YES Check P SENS P7904 _PIN6 NO Refer to SMPS troubleshooting YES YES Check both end voltage of IC101 KIA7042 Check if input voltage of IC101 KIA7042 is over 5V YES NO Check the periphery of IC101 KIA7042 NO YES Check if IC101 KIA7042 of output voltage is over 4 3V Check voltage of IC100 78KO KF2_PIN1 NO Replace IC101 KIA7042 2 MICOM PART CHECK I ...

Page 19: ...5V Check Q102_base 0 6V HIGH Check if IC103_PIN8 and IC100_PIN19 20 59 are 5V NO NO YES YES Check if voltage of P7904_PIN5 is 5 6V NO Refer to SMPS troubleshooting YES YES YES OK YES Check both end voltage of D101 YES YES Check D101 NO Check if output of D101 RL104 is 5V YES YES YES YES Check IC101 Q102_collector 0 6V LOW OK Check if output of IC101 KIA7042 is over 4 3V OK NO Replace IC101 NO Repl...

Page 20: ...rved Only for training and service purposes LGE Internal Use Only Check IC100 78KOKF2 _ PIN 22 24 OK YES YES Refer to micom troubleshooting Check micom voltage 5V PIN22 DATA PIN24 CLK NO NO YES Replace micom Check micom NO YES OK 4 IC103 KS4CD21CS CHECK ...

Page 21: ... Check P7904_PIN1 2 3 voltage input NO Check WF31 connection NO If voltage is not 5V check input and output of D301 1SR35 YES Check WF31 connection and power Pin1 FL 22 Pin2 FL 26 Pin3 VKK over 26V YES YES YES YES OK OK 76 PIN DO Check DATA in Check IC100 NO IC100 75 PIN STB 77 PIN 4PIN DI 78 PIN 1PIN CLK Check data output IC100 Check IC301 DATA communication PIN PIN 75PIN 3PIN STB 76PIN 2PIN D 78...

Page 22: ...29 PIN86 CLK input check NO Check FB614 BEAD input output and voltage NO Check X601 12 288MHz Replace X601 OK NO OK YES YES NO Replace FB614 NO Check IC605_ PIN2 output YES OK YES OK Replace IC605 NO Check R680 470Ω output Replace R680 NO Check IC604 PS9829 DATA input Check each LINE registor output NO Check IC604 PS9829 DATA input 78 PIN DATA 79 PIN CLK Check PWM modulator output FL 75 74 FR 71 7...

Page 23: ...stor output voltage IC700 R701 702 726 727 NO Check IC700 PIN1 17 18 19 36 12V input Refer to SMPS troubleshooting YES YES YES NO P7905_3PIN 12V PIN13 14 15 35V YES Replace the coils YES NO Check output line coil Check PWM modulator input Each IC PIN4 6 14 16 YES Power IC700 PIN20 27 29 34 output Check IC700 PIN21 26 29 34 input voltage OK 7 POWER AMP PART CHECK ...

Page 24: ...IC301 _ PIN83 84 commucation NO NO YES Replace IC200 YES YES YES Check IC200 BU4052 _ PIN4 11 input waveform Check IC200 BU4052 _PIN16 VDD PIN8 VSS power Refer to SMPS troubleshooting NO NO YES Replace IC801 OK YES YES Check IC801 MC4580 _PIN 2 6 input waveform Check IC801 MC4580 _PIN4 VSS PIN8 VDD power Check IC200 BU4052 _ PIN3 13 output waveform Check JK800 connection ...

Page 25: ... PIN16 VDD PIN8 VSS power NO Check IC200 BU4052 _PIN3 13 output waveform and IC601 BU4052 _PIN2 15 input waveform Check TUNER module voltage PIN2 9V YES YES YES YES NO Check TUNER module TU601 operation YES Check IC801 MC4580 _ PIN4 VSS PIN8 VDD power YES NO Check IC801 MC4580 _ PIN2 6 input waveform Replace IC200 Replace IC200 Replace IC801 Check IC200 BU4052 _PIN1 12 input waveform OK ...

Page 26: ...ck YES Check IC200 BU4052 _ PIN16 VDD PIN8 VSS power YES YES YES NO Check IC200 BU4052 _PIN2 15 input waveform Check IC200 BU4052 _ PIN16 VDD PIN8 VSS power YES NO Check IC801 MC4580 _ PIN2 6 input waveform YES Replace IC200 Replace IC200 Replace IC200 Check IC200 BU4052 _PIN3 13 output waveform and IC601 BU4052 _ PIN2 15 input waveform YES TAPE PCB ASS Y OK ...

Page 27: ...ace head wire and tape deck mechanism NO NO YES YES Check deck head input IC201_PIN34 37 YES YES YES YES Check IC201_ PIN5 26 signal output Check IC201 HA12237 _PIN16 12V input Check deck head input NO Refer to SMPS troubleshooting Check IC202_PIN10 HIGH NO Check IC201_PIN14 mute operation Replace IC201 NO YES OK Check IC201 YES Replace IC202 NO YES OK OK Check IC202 ...

Page 28: ...00_PIN23 HIGH NO NO YES YES Check IC201_ PIN7 24 record input Check P2203_PIN5 3 input and PIN8 erase input YES YES YES YES YES Check L203_PIN2 3 oscillation Check IC604 PS9829 _PIN49 52 PWM output Check Q205 D1304 _ base HIGH Replace IC201 NO NO Check IC201_ PIN10 21 output Check IC100_PIN23 HIGH NO Refer to PWM modulation troubleshooting OK YES Replace IC202 YES OK OK ...

Page 29: ...ck µ COM IC301 _ PIN83 84 commucation NO NO YES Replace IC200 YES YES YES Check IC200 BU4052 _ PIN5 14 input waveform Check IC200 BU4052 _PIN16 VDD PIN8 VSS power Refer to SMPS troubleshooting NO NO YES Replace IC801 OK YES YES Check IC801 MC4580 _PIN 2 6 input waveform Check IC801 MC4580 _PIN4 VSS PIN8 VDD power Check IC200 BU4052 _ PIN3 13 output waveform Check JK32 connection ...

Page 30: ...g and service purposes LGE Internal Use Only INTERNAL BLOCK DIAGRAM OF ICs 1 AK5358 VA AGND VD DGND MCLK Clock Divider Serial I O Interface Decimation Filter Decimation Filter Modulator Voltage Reference LRCK SCLK SDTO DIF PDN CKS0 CKS1 CKS2 VCOM AINR AINL Modulator 2 BU4052 ...

Page 31: ...3 17 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 3 HA12237F ...

Page 32: ...OL SERVO CONTROL SUBCODE DECODER ROM DECODER MP3 WMA DECODER TEXT PORT CONTROL PLL3 MCU I F System Control Memory 1M Bit Stream Control Audio Output Control PLL2 DOUT Control LPF ATTENUATION CONTROL Bass Boost INTERPOLATION MUTE ERROR CORRECTION Synchronization Detection EFM Demodulation 1 Bit DAC 8FS DIGITAL FILTER DEEMPHASIS CLOCK GENERATOR Memory I F 5 PS9829B MBCK SBCK SLRCK MLRCK MSDIN 0 3 SS...

Page 33: ...R2 GR3 GR4 GR5 GR6 GR7 GR8 GR9 GR10 GR11 GR12 GR13 GR14 GR15 GR16 Segment Driver Dimming Circuit Grid Driver Control DIN DOUT CLK STB OSC LED1 K1 K2 VDD GND VEE Timing Generator Key Matrix Memory LED Driver CSC Serial Data Interface Display Memory 7 STR W6253 VCC FM SS ELP FB 12V 160 µA DMAX 75 7 1V 28 5V 7 1V 1startup 1 6mA VREG 15 5V 8 9V D ST S OCP GND DRV RST OVP REG UVLO PWM OSC Frequency Mod...

Page 34: ...ESET_AB RESET_CD System Power Supply Hardwire Mode Control PVDD GVDD 12 V VDD 12 V GND Hardwire OC Limit M1 M3 PVDD Power Supply Decoupling 32 V 12 V GND VAC PWM_A PWM_C PWM_D PWM_B VALID M2 Left Channel Output Right Channel Output Input HúBridge 1 Input H Bridge 2 GVDD VDD VREG Power Supply Decoupling 4 PVDD_A B C D GND_A B C D GVDD_A B C D 4 4 VDD GND VREG AGND OC_ADJ Bootstrap Capacitors 2nd Or...

Page 35: ...control PCL P140 EXLVI P120 VDD EVDD VSS EVSS FLMD0 16 bit timer event counter 00 TO00 TI010 P01 TO01 TI011 P06 TI000 P00 TI001 P05 TOH0 P15 TOH1 P16 TI50 TO50 P17 TI51 TO51 P33 RxD0 P11 TxD0 P10 RxD6 P14 TxD6 P13 SI10 P11 SO10 P12 SI11 P03 SO11 P02 SCK11 P04 SCK11 P05 SIA0 P143 SOA0 P144 SCKA0 P142 STB0 P145 BUSY0 P141 EXSCL0 P62 SDA0 P61 SCL0 P60 AVREF RxD6 P14 LINSEL INTP0 P120 INTP1 P30 to INT...

Page 36: ...3 22 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 10 UTC MC4580 10 1 PIN CONFIGURATION 10 2 TEST CIRCUIT ...

Page 37: ...3 23 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only MEMO ...

Page 38: ...y 3 24 6P 5P 16P 8P CD PCB 2 CH SPK TERMINAL AUX JACK TUNER MODULE 1 CD SINGLE MD MAIN PCB SINGLE DECK MECHANISM 30P 5P 8P 3P 9P 29P USB PORT IN H P FRONT PCB SMPS PCB 15P 4P Total CNT Q ty 12ea 1 SMPS MAIN 2ea 2 MAIN CD 2ea 3 MAIN FRONT 2ea 4 FRONT CD 1ea 5 CD MD 3ea 6 DECK MECHA 2ea RED RED 3 25 WIRING DIAGRAM ...

Page 39: ...service purposes LGE Internal Use Only AC INPUT ZNR FILTER T R A N S MAIN AMP PWM IC 12V 78R12 5V P SENS 5 6VA KIA278R05 CN2 CN1 AMP 31 5V 3 5V 278R35 RECTIFICATION SMOOTHING CIRCUIT BETWEEN FL1 AND FL2 4 5V 12V FEED BACK 31 5V VKK 3 26 3 27 BLOCK DIAGRAMS 1 SMPS BLOCK DIAGRAM ...

Page 40: ... TAP TAPE L R E L R TUN TUNER L L R AUX AUX L R OP OP AMP MP AK535 AK5358 OP OP AMP MP LEVEL LEVELMETE TER RE REC L R L R AK5358 R AK5358 REST ST CD CD DATA CL ATA CL K PO PORT INPUT RT INPUT AUX AUX INP INPUT HE HEAD PHONE HONES BU40 BU4052 52 DATA USB USB DA DA 5V CD DATA CLK AK5358 AK5358 CLK CLK DA DATA TA H P_SW H P_SW PW PWM M OUT OUT CD CD SANYO SANYO LC786 LC78692N 92NW FLD DISPLAY VFD VFD...

Page 41: ...E REPLACED ONLY WITH TYPES IDENTICAL TO THOSE IN THE ORIGINAL CIRCUIT SPECIAL COMPONENTS ARE SHADED ON THE SCHEMATIC FOR EASY IDENTIFICATION THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIFFER FROM THE ACTUAL CIRCUIT USED THIS WAY IMPLEMENTATION OF THE LATEST SAFETY AND PERFORMANCE IMPROVEMENT CHANGES INTO THE SET IS NOT DELAYED UNTIL THE NEW SERVICE LITERATURE IS PRINTED 1 Shaded parts are critical for ...

Page 42: ...Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 3 32 3 33 2 MAIN SCHEMATIC DIAGRAM ...

Page 43: ...Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 3 34 3 35 3 AMP SCHEMATIC DIAGRAM ...

Page 44: ...Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 3 36 3 37 4 DECK SCHEMATIC DIAGRAM ...

Page 45: ...Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 3 38 3 39 5 FRONT SCHEMATIC DIAGRAM ...

Page 46: ...Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 3 40 3 41 1 MAIN P C BOARD TOP VIEW PRINTED CIRCUIT BOARD DIAGRAMS ...

Page 47: ...Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 3 42 3 43 MAIN P C BOARD BOTTOM VIEW ...

Page 48: ...Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 3 44 3 45 2 SMPS P C BOARD ...

Page 49: ...Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 3 46 3 47 3 FRONT P C BOARD TOP VIEW ...

Page 50: ...Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 3 48 3 49 FRONT P C BOARD BOTTOM VIEW ...

Page 51: ...Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 3 50 3 51 MEMO MEMO ...

Page 52: ...voltage PN805 PIN22 CLOSE PIN23 OPEN YES NO Reading Display check Connector check PN802 PN803 PN804 CN806 NO Check micom interface circuit PN805 CE BTL MUTE CD IN CD OUT CLK WRQ FSEQ YES NO Reading OK check Connector check PN801 PN802 NO YES If PALY AUDIO OUTPUT check Check PN805 audio data PIN10 DA_LRCK IC801 PIN60 LRSY PIN11 DA_BCK IC801 PIN59 DATACLK PIN12 DA_DATA0 IC801 PIN58 DATA NO Check pic...

Page 53: ...04 YES YES YES YES Check power supply circuit PN805 CN806 CN806 PIN1 12V PIN2 6 3V PN805 PIN8 5V_AD Defective main power supply NO Check voltage change LO LO OF IC803 PN805 PIN23 OPEN PIN22 CLOSE Defective IC803 Defective mechanism NO Check voltage change of OPEN CLOSE IC803 INPUT voltage PIN6 12V PIN7 6 3V PN805 PIN2 BTL_MUTE 23 OPEN 22 CLOSE Defective micom NO ...

Page 54: ... PIN1 12V PIN2 6 3V PIN4 5V PN805 PIN8 5V_AD Defective connector or main power supply Defective IC804 NO Check micom interface circuit PN805 PN805 PIN1 3 4 15 19 26 signal check 1 CE 3 DI 4 CLK 15 D0 19 RST 18 FSEQ 26 WRQ PIN3 DI From DSP to micom PIN15 DO From micom to DSP Check the waveform 1 Defective micom or connector Defective IC801 NO Check voltage The PIN2 of IC804 IC804 PIN2 3 3V NO Defec...

Page 55: ...ove NO NO Check PN802 PIN3 4 SL SL 1 3 READING OK CHECK NO DISC DISPLAY Does lense move UP DOWN YES A YES Defective pick up or IC802 or IC801 NO NO Check PN801 PIN13 16 FA FA B Defective pick up or IC801 Does laser light NO NO Check PN801 PIN10 LD YES C Defective pick up or IC802 or IC801 Does spindle rotate NO NO Check PN802 PIN5 6 SP SP YES D Defective pick up or IC802 or IC801 NO NO Check PN801...

Page 56: ...1 4 READING OK CHECK A NO DISC DISPLAY YES YES A Defective IC802 NO Defective PN802 connector Defective pick up sled motor Check PN802 connector line YES Defective IC801 Does FA waveform appear at IC802 PIN16 and PN801 PIN13 waveform 3 focus coil drive wave Does fain waveform appear at IC802 PIN25 waveform 3 focus drive wave NO NO 1 5 READING OK CHECK B NO DISC DISPLAY YES YES B Defective IC802 NO...

Page 57: ...f PN801 laser supply voltage check Is 3 3V applied to PIN30 36 39 41 61 68 75 of IC801 RF IC supply voltage check NO NO 1 6 READING OK CHECK C NO DISC DISPLAY YES YES Defective IC801 Is 2 3V PIN18 LDO of IC801 laser control voltage check NO YES C Defective Q801 or D801 NO Defective PN801 connector Defective pick up laser part Check PN801 connector line YES ...

Page 58: ... IC801 Does SP waveform appear at IC802 PIN11 and PN802 PIN5 waveform 4 spindle motor drive wave Does spin waveform appear at IC802 PIN6 waveform 4 spindle drive wave NO NO 1 7 READING OK CHECK D NO DISC DISPLAY YES YES D Defective IC802 NO Defective PN802 connector Defective pick up spindle motor Check PN802 connector line YES ...

Page 59: ...801 Does TA waveform appear at IC802 PIN17 and PN801 PIN14 waveform 5 tracking coil drive wave Does tain waveform appear at IC802 PIN22 waveform 5 tracking drive wave NO NO 1 8 READING OK CHECK E NO DISC DISPLAY YES YES E Defective IC802 Does ARF signal appear IC801 PIN 2 waveform 6 NO Defective pick up or IC801 Check PN802 connector line NO Defective PN802 connector YES YES NO Defective pick up o...

Page 60: ...r supply circuit CN806 Check micom interface circuit PN805 PIN13 RX IC805 PIN49 TXD PIN14 TX IC805 PIN33 RXD NO NO Check PN810 PIN2 D 3 D Check OTI6888 IC805 Connector check CN806 OK YES Checking or USB display check NO YES Check PN810 1PIN 5V Reading OK check NO Check signal STCK STREQ STDATA STCK IC805 PIN52 IC801 PIN55 STREQ IC805 PIN53 IC801 PIN54 STDATA IC805 PIN54 IC801 PIN56 If PLAY AUDIO O...

Page 61: ...wer on PIN26 WRQ PIN19 RESET PIN3 DI IC801 PIN46 DATA OUT PIN15 DO IC801 PIN45 DATA IN 1 MICOM INTERFACE WAVEFORM PN805 PIN26 19 3 15 during normal play PIN26 WRQ PIN19 RESET PIN3 DI IC801 PIN46 DATA OUT PIN15 DO IC801 PIN45 DATA IN 1 MICOM INTERFACE WAVEFORM PN805 PIN4 1 18 during power on PIN4 CL PIN1 CE PIN18 FSEQ 1 MICOM INTERFACE WAVEFORM PN805 PIN4 1 18 during normal play PIN4 CL PIN1 CE PIN...

Page 62: ...n focus search PIN5 SLIN PIN13 SL 2 SLED DRIVE AND MOTOR WAVEFORM IC802 PIN5 13 during normal play PIN5 SLIN PIN13 SL 3 FOCUS DRIVE AND MOTOR WAVEFORM IC802 PIN25 IC802 PIN16 When focus search failed or there is no disc on tray PIN25 FAO PIN16 FA 3 FOCUS DRIVE AND MOTOR WAVEFORM IC802 PIN25 IC802 PIN16 There is disc on tray and focus search success PIN25 FAO PIN16 FA ...

Page 63: ...ernal Use Only 4 SPINDLE DRIVE AND MOTOR WAVEFORM IC802 PIN6 11 when TOC reading PIN6 SPIN PIN11 SP 5 TRACK DRIVE AND MOTOR WAVEFORM IC802 PIN22 IC802 PIN17 during normal play 6 RF FOCUS AND TRACKING ERROR WAVEFORM IC801 PIN2 10 16 during normal play PIN2 RFOUT PIN 16 TE PIN10 RFMON FE PIN22 TAO PIN17 TA ...

Page 64: ...Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 4 13 4 14 SCHEMATIC DIAGRAMS 1 CD SCHEMATIC DIAGRAM ...

Page 65: ...Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 4 15 4 16 2 USB SCHEMATIC DIAGRAM ...

Page 66: ...Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only CD P C BOARD TOP VIEW BOTTOM VIEW PRINTED CIRCUIT BOARD DIAGRAM 4 17 4 18 ...

Page 67: ...Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 4 19 4 20 MEMO MEMO ...

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