LG XC102 Service Manual Download Page 1

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MICRO Hi-Fi SYSTEM

SERVICE MANUAL

MODEL : XC102 (XCS102F)

CAUTION

BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS”
IN THIS MANUAL.

MODEL

: XC102 (XCS102F)

SER

VICE MANUAL

P/NO : AFN

32840891

APRIL, 2007

http://biz.lgservice.com

Summary of Contents for XC102

Page 1: ...i Fi SYSTEM SERVICE MANUAL MODEL XC102 XCS102F CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL MODEL XC102 XCS102F SERVICE MANUAL P NO AFN32840891 APRIL 2007 http biz lgservice com ...

Page 2: ... 4 PS9829B 3 13 5 PT6324 3 13 6 STR W6753 3 14 7 TAS5142 3 15 8 U1739EJ2V1UD00 KF2_E 3 16 9 UTC MC4580 3 17 WIRING DIAGRAM 3 18 BLOCK DIAGRAM 3 20 1 SMPS BLOCK DIAGRAM 3 20 2 MAIN FRONT BLOCK DIAGRAM 3 22 SCHEMATIC DIAGRAMS 3 24 1 SMPS SCHEMATIC DIAGRAM 3 24 2 MAIN SCHEMATIC DIAGRAM 3 26 3 AMP SCHEMATIC DIAGRAM 3 28 4 FRONT SCHEMATIC DIAGRAM 3 30 PRINTED CIRCUIT BOARD DIAGRAMS 3 32 1 MAIN P C BOAR...

Page 3: ...e 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 be cleaned away by using an air bush such as used for ca...

Page 4: ...ed 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 pick up to come in contact with clothing in order to preve...

Page 5: ...harges 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 shorted together by conductive foam aluminum foil or comparabl...

Page 6: ...NE STOP VOLUME CONTROL KNOB 4 USB 5 XDSS plus XTS pro EQ Master ST MONO PROG CD 6 DISC TRAY 7 Headphone jack ø3 5mm 8 DEMO TIMER CLOCK SET RDS OPTIONAL 9 USB connector 10 PORT IN jack 11 AUX PORTABLE 12 TUNER 13 DISPLAY WINDOW 14 POWER IN POWER CORD 15 AM FM ANTENNA TERMINAL 16 AUX IN AUXILIARY INPUT connector 17 SPEAKER TERMINAL ...

Page 7: ...AUSE STOP SKIP SEARCH TUN REPEAT EQ master XDSS plus XTS Pro RANDOM NUMERIC DIMMER MUTE USB FUNCTION VOLUME CLOCK PROGRAM MEMO D SKIP RDS Radio Data System FUNCTION RDS OPTIONAL PTY OPTIONAL PTY SEARCH OPTIONAL MP3 Info MP3 WMA file information display ...

Page 8: ...nse 50 10000Hz AM Tuning Range 522 1620kHz or 520 1720kHz Intermediate Frequency 450kHz Signal to Noise Ratio 30dB Frequency Response 140 1800Hz AMPLIFIER Output Power 50W 50W 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 SPEAKERS Type 2 Way 2 Speaker Impedance 4Ω Frequency Response 80 20000 Hz Soun...

Page 9: ...1 8 MEMO ...

Page 10: ... B K E J F L G B C E G J K L 256 250 254 252 454 A26 A52 454 A46 305 454 454 454 A47 263 266 264 290 454 454 454 259 CABLE3 CABLE2 A43 255 257 267 256 258 SMPS CD MAIN FRONT SECTION 2 EXPLODED VIEWS CABINET EXPLODED VIEW ...

Page 11: ...A26 018 A02 020 A01 001 002 003 010 432 432 431 026 037 012 012 019 A03 016 015 036 012A 012A 439 014 013 017 CD MECHANISM CDM 330 EXPLODED VIEW ...

Page 12: ...850 851 852 853 854 855 856 857 858 WIRE80 A80 A80A SPEAKER EXPLODED VIEW MODEL XCS102F ...

Page 13: ...2 7 2 8 MEMO MEMO ...

Page 14: ...2 9 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: ...901 NO NO NO YES Check short of P9701 P9702 line Replace the fuse Check the DC V of C905 If DC V is over 400V NO Check BD901 LF901 902 Check the DC V of C981 C945 If DC V is 6 1V NO Check short of P9702 line YES YES Chcek the DC V of C950 C951 If DC V is in 31 5V NO Check short of P9701 line Chcek the DC V of C909 C903 C921 If DC V is in 14 19V and it is steady YES ...

Page 16: ...cuit Trouble shooting NO OK 4 MICOM PART CHECK I MICOM part check I OK OK YES YES Check P SENS P7904 _PIN6 NO Refer to SMPS troubleshooting YES 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 IC10...

Page 17: ...0_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 Replace D101 YES Check Q102 OK NO Replace Q102 ...

Page 18: ...3 4 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 6 IC103 KS4CD21CS CHECK ...

Page 19: ...ion 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 78PIN 1PIN CLK Check IC301 PT6324 voltage Pin50 VKK 26V PIN...

Page 20: ... 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 70 NO NO Check DVD ASS Y PS9829 communication P7403 Refer ...

Page 21: ... 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 9 POWER AMP PART CHECK ...

Page 22: ...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 23: ...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 24: ...C200 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 25: ...CK 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 26: ...78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 LRSY DATACK DATA TEST1 STDATA STCK STREQ TEST0 CONT0 CONT1 CONT2 INTB1 INTB0 RESB DO DI CL CE DVSS DVDD 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 CD PLL A D D A APC JITIER TES HFL DEFECT VREF MONITOR RF SIGNAL PROCESSOR SLICE LEVEL CONTROL SERVO CONTROL SUBCODE DECODER ROM DECODER MP3 WMA DECODER TEXT PORT CONTROL PLL3 MCU I F...

Page 27: ...e Converter Input Output MUX Serial Audio Output Interface Down Mixer Mixer 4 Band EQ Bass Manager Main Volume Trim Volume Serial Audio Output Interface PWM Modulator POP NR Power Supply Output Mapper PLL Reset Power Down Automatic Gain Limiter 5 PT6324 SG1 KS1 SG2 KS2 SG3 KS3 SG4 KS4 SG5 KS5 SG6 KS6 SG7 KS7 SG7 KS7 SG8 KS8 SG9 KS9 SG10 KS10 SG11 KS11 SG12 KS12 SG13 KS13 SG14 KS14 SG15KS15 SG16 KS...

Page 28: ...R W6753 4 Vcc Start Stop Burst OSC Protection latch DRIVE Reg Delay Burst Control BSD OCP GND S D FB FB OCP BD SS OLP BD Q Q S S R R MaxON R Q S OLP Reg Iconst Soft Start Counter Bottom Selector 5 7 6 3 2 1 OVP ...

Page 29: ...l 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 Order L C Output Filter for Each Half Bridge SD OTW Output ...

Page 30: ...t 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 INTP4 P33 INTP5 P16 INTP6 P140 INTP7 P141 AVSS ANI0 P20 to A...

Page 31: ...3 17 9 UTC MC4580 9 1 PIN CONFIGURATION 9 2 TEST CIRCUIT ...

Page 32: ...ERMINAL AUX JACK TUNER MODULE 1 CD SINGLE MD MAIN PCB 30P 30P 5P P 3P 29P USB PORT IN H P FRONT PCB SMPS PCB 15P 4P Total CNT Q ty 10ea 1 SMPS MAIN 2ea 2 MAIN CD 2ea 3 MAIN FRONT 1ea 4 FRONT CD 1ea 5 CD MD 3ea RED RED 3 19 WIRING DIAGRAM ...

Page 33: ...P Switch IC 1 MAIN Switch IC 2 T R A N S 2 FL1 FL2 4 5V 12V 12V 78R12 5V P SENS 6 1V KIA278R05 P9702 P9701 FEED BACK AMP 31 5V 3 5V 278R35 31 5V VKK RECTIFICATION SMOOTHING CIRCUIT FEED BACK 3 20 3 21 BLOCK DIAGRAMS 1 SMPS BLOCK DIAGRAM ...

Page 34: ...LLDAT 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 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 ...

Page 35: ...INAL 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 safety Replace only with specified part number 2 Voltages...

Page 36: ...3 26 3 27 2 MAIN SCHEMATIC DIAGRAM ...

Page 37: ...3 28 3 29 3 AMP SCHEMATIC DIAGRAM ...

Page 38: ...3 30 3 31 4 FRONT SCHEMATIC DIAGRAM ...

Page 39: ...3 32 3 33 1 MAIN P C BOARD TOP VIEW PRINTED CIRCUIT BOARD DIAGRAMS ...

Page 40: ...3 34 3 35 MAIN P C BOARD BOTTOM VIEW ...

Page 41: ...3 36 3 37 2 SMPS P C BOARD ...

Page 42: ...3 38 3 39 3 FRONT P C BOARD TOP VIEW BOTTOM VIEW ...

Page 43: ...3 40 3 41 MEMO MEMO ...

Page 44: ...ay 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 pick up movement NO Check AM5810FP IC802 NO Check LC78692 IC...

Page 45: ... 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 46: ...nnector 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 Defective micom or connector Check reset signal of PN805 PN805...

Page 47: ...O 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 PIN14 15 TA TA E ...

Page 48: ...e 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 Defective PN801 connector Defective pick up focus actuat...

Page 49: ...30 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 50: ...IN5 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 51: ...4 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 or IC801 ...

Page 52: ...5 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 OUTPUT check NO NO ...

Page 53: ... 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 PIN18 FSEQ ...

Page 54: ...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 55: ...IN6 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 56: ...4 13 4 14 SCHEMATIC DIAGRAMS 1 CD SCHEMATIC DIAGRAM ...

Page 57: ...4 15 4 16 2 USB SCHEMATIC DIAGRAM ...

Page 58: ...CD P C BOARD TOP VIEW BOTTOM VIEW PRINTED CIRCUIT BOARD DIAGRAM 4 17 4 18 ...

Page 59: ...4 19 4 20 MEMO MEMO ...

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LG XC102, Service Manual

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