LG XC62-A0U Service Manual
  1. Manuals
  2. Brands
  3. LG Manuals
  4. Stereo System
  5. XC62-A0U
  6. Service manual
LG XC62-A0U Service Manual

LG XC62-A0U Service Manual

Hide thumbs Also See for XC62-A0U:
Table of Contents

Advertisement

Quick Links

See also: Owner's Manual
Internal Use Only
Website http://biz.lgservice.com
MICRO Hi-Fi SYSTEM
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS"
IN THIS MANUAL.
MODELS : XC62-A0U, XC62, XC-U62X (XCS62F)
P/NO : AFN35036923
AUGUST, 2007

Advertisement

Table of Contents
loading

Related Manuals for LG XC62-A0U

Summary of Contents for LG XC62-A0U

  • Page 1 Internal Use Only Website http://biz.lgservice.com MICRO Hi-Fi SYSTEM SERVICE MANUAL CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL. MODELS : XC62-A0U, XC62, XC-U62X (XCS62F) P/NO : AFN35036923 AUGUST, 2007...

  • Page 2: Table Of Contents

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

  • Page 3: Servicing Precautions

    Take care not to use too much of this alcohol on the swab, and do not allow the alcohol to get inside the pick-up. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 4: Notes Regarding Compact Disc Player Repairs

    NOTE: 1. To operate the RESET jump wire, pull the volume rotary knob and release it. 2. If you wish to operate the RESET jump wire, it is necessary to unplug the power cord. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only...

  • Page 5: Esd Precautions

    THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 6: Location Of Users Controls

    14.AM/FM ANTENNA TERMINAL • CD SYNC 15.AUX IN (AUXILIARY INPUT) connector • CD OPEN (DEMO) 16.POWER IN (POWER CORD) 17.SPEAKER TERMINAL Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 7: Remote Control

    RDS (Radio Data System) FUNCTION RDS : OPTIONAL • MP3 Info PTY : OPTIONAL • (MP3/WMA file information display) PTY SEARCH : OPTIONAL • NUMERIC LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 8: Specifications

    Sound Pressure Level 83dB/W (1m) Rated Input Power Max. Input Power Net Dimensions (WxHxD) 144 x 243 x 171mm Net Weight (1EA) 1.47kg Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 9 MEMO LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 10: Exploded Views

    SECTION 2 EXPLODED VIEWS CABINET EXPLODED VIEW Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 11: Tape Deck Mechanism (Single Deck) Exploded View

    TAPE DECK MECHANISM (SINGLE DECK) EXPLODED VIEW #EV# LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 12: Cd Mechanism Exploded View

    CD MECHANISM (CDM-330) EXPLODED VIEW Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 13: Speaker Exploded View

    SPEAKER EXPLODED VIEW MODEL : XCS62F LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 14: Packing Accessory View

    824 Antenna Loop (AM) 825 Antenna (FM) 900 Remote Control 801 Instruction Ass'y 803 Packing 803 Packing 804 Bag 802 Box Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 15: Audio Electrical Troubleshooting Guide

    Is the D943 normal? Replace the D943 Is the D941 normal? Replace the D941 Power line of main PCB is short LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 16 IC947 pin1? Check the P CTL “H” Is the IC947 pin4 “H”? signal from µ-com Check or Replace the IC947 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 17 12V? Check or Replace the Q942 No VF+ Is the ZD950 Replace the ZD950 Normal? Replace the R993 or Q950, Q943 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 18: Micom Part Check I

    (KIA7042). IC101(KIA7042) is (KIA7042). (KIA7042). over 5V. Check voltage of IC100 Check if IC101(KIA7042) of 78KO/KF2_PIN1. output voltage is over 4.3V. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 19: Micom Part Check Ii

    Q102_collector 0.6V LOW. IC100_PIN19, 20, 59 are 5V. X101 : 32.768kHz X100 : 9.8304MHz Check Q102. Replace Q102. Check the operation. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 20: Ic103(Ks4Cd21Cs) Check

    Check IC100(78KOKF2)_ PIN 22, 24 Refer to PIN22 Check micom micom troubleshooting DATA PIN24 CLK voltage 5V. Check micom. Replace micom. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 21: Fld Display Check

    78PIN - > 1PIN 76 PIN - > DO - - > Check DATA in Check IC100. FLD light on? Replace IC100 Check IC100. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 22: Pwm Modulation Part Check

    79 PIN->CLK (P7403). Check Check each LINE IC604(PS9829) DATA registor output. Check PWM input. modulator output. FL:75(+)74(-) FR:71(+)70(-) Check IC604(PS9829). Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 23: Power Amp Part Check

    Check PWM modulator input. Each IC PIN4, 6, 14, 16 Power IC700 PIN20, 27, 29, 34 output. Replace the coils Check output line coil. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 24: Aux Function Check

    PIN3, 13 output waveform. Check Check Refer to IC801(MC4580)_PIN4 IC801(MC4580)_PIN 2, 6 SMPS troubleshooting. VSS, PIN8 VDD input waveform. power. Replace IC801 Copyright © 2007 LG Electronics. Inc. All right reserved. 3-10 LGE Internal Use Only Only for training and service purposes...

  • Page 25: Tuner Function Check

    Replace IC200. Replace IC200. Check IC801(MC4580)_ Check IC801(MC4580)_ PIN4 VSS, PIN8 VDD power. PIN2, 6 input waveform. Replace IC801. LGE Internal Use Only 3-11 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 26: Tape Function Check

    IC601(BU4052)_ PIN2, 15 input waveform. Check IC200(BU4052)_ Check IC801(MC4580)_ PIN16 VDD, PIN8 VSS power PIN2, 6 input waveform. Replace IC200. Copyright © 2007 LG Electronics. Inc. All right reserved. 3-12 LGE Internal Use Only Only for training and service purposes...

  • Page 27: Tape Play Part Check

    Check deck head input IC201_PIN34, 37. Replace IC201. Check IC201 Check IC201_PIN14 Check IC202_PIN10 "HIGH" mute operation. Check IC202. Replace IC202. LGE Internal Use Only 3-13 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 28: Tape Rec Part Check

    Check L203_PIN2, 3 Check Q205(D1304)_ Check IC100_PIN23 "HIGH" oscillation. base "HIGH". Replace IC202. Check P2203_PIN5, 3 input and PIN8 erase input. Copyright © 2007 LG Electronics. Inc. All right reserved. 3-14 LGE Internal Use Only Only for training and service purposes...

  • Page 29: Portable In Function Check

    PIN3, 13 output waveform. Check Check Refer to IC801(MC4580)_PIN4 IC801(MC4580)_PIN 2, 6 SMPS troubleshooting. VSS, PIN8 VDD input waveform. power. Replace IC801 LGE Internal Use Only 3-15 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 30: Internal Block Diagram Of Ics

    Modulator Filter LRCK SCLK Decimation AINR Filter Modulator Serial I/O SDTO Interface VCOM Voltage Reference CKS2 CKS1 CKS0 2. BU4052 Copyright © 2007 LG Electronics. Inc. All right reserved. 3-16 LGE Internal Use Only Only for training and service purposes...

  • Page 31: Ha12237F

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

  • Page 32: Lc78692Nw

    SO/SDA Host SCK/SCL Reset & Power Down Interface Internal Controls SI/I2C_AD0 PWM_SWL_P/M C, SPI) /CS/I2C_AD2 EPD_ENA EXT_MUTE Power Supply OVERLOAD Copyright © 2007 LG Electronics. Inc. All right reserved. 3-18 LGE Internal Use Only Only for training and service purposes...

  • Page 33: Pt6324

    7.1V DMAX 75% PWM OSC Frequency FM/SS Modulation /ELP TOLP= TFMx 16 Soft Start µA Feedback Control S/OCP Slope Compensation LGE Internal Use Only 3-19 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 34: Tas5142

    32 V Hardwire Supply VREG OC Limit System Decoupling Power Supply Power Decoupling Supply GVDD (12 V)/VDD (12 V) 12 V Copyright © 2007 LG Electronics. Inc. All right reserved. 3-20 LGE Internal Use Only Only for training and service purposes...

  • Page 35: U1739Ej2V1Ud00/Kf2_E

    ANI0/P20 to oscillator ANI7/P27 A/D converter Voltage REGC FLMD0 regulator RxD6/P14 (LINSEL) INTP0/P120 INTP1/P30 to INTP4/P33 Interrupt control INTP5/P16 INTP6/P140, INTP7/P141 LGE Internal Use Only 3-21 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 36: Utc Mc4580

    10. UTC MC4580 10-1. PIN CONFIGURATION 10-2. TEST CIRCUIT Copyright © 2007 LG Electronics. Inc. All right reserved. 3-22 LGE Internal Use Only Only for training and service purposes...
  • Page 37 MEMO LGE Internal Use Only 3-23 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 38: Wiring Diagram

    5. CD MD : 3ea 6. DECK MECHA. : 2ea CD PCB MAIN SINGLE DECK MECHANISM PORT FRONT PCB Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only 3-24 3-25 Only for training and service purposes...

  • Page 39: Block Diagram

    5.6VA (KIA278R05) MAIN&AMP PWM IC -12V ZNR & FILTER -31. 5V(VKK) BETWEEN FL1 AND FL2(4.5V) AC INPUT FEED BACK LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. 3-26 3-27 Only for training and service purposes...

  • Page 40: Main & Front Block Diagram

    AUX INP INPUT SANYO SANYO LC786 LC78692N 92NW PORT INPUT RT INPUT PORT PORT L/R /R USB DA+.-. DA+.-. 5V Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only 3-28 3-29 Only for training and service purposes...

  • Page 41: Schematic Diagrams

    IDENTICAL TO THOSE IN THE ORIGINAL CIRCUIT. THE SET IS NOT DELAYED UNTIL THE NEW SERVICE SPECIAL COMPONENTS ARE SHADED ON THE LITERATURE IS PRINTED. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. 3-30 3-31 Only for training and service purposes...

  • Page 42: Main Schematic Diagram

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

  • Page 43: Amp Schematic Diagram

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

  • Page 44: Deck Schematic Diagram

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

  • Page 45: Front Schematic Diagram

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

  • Page 46: Printed Circuit Board Diagrams

    PRINTED CIRCUIT BOARD DIAGRAMS 1. MAIN P.C.BOARD (TOP VIEW) Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only 3-40 3-41 Only for training and service purposes...
  • Page 47 MAIN P.C.BOARD (BOTTOM VIEW) LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. 3-42 3-43 Only for training and service purposes...

  • Page 48: Smps P.c.board

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

  • Page 49: Front P.c.board

    3. FRONT P.C.BOARD (TOP VIEW) LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. 3-46 3-47 Only for training and service purposes...
  • Page 50 FRONT P.C.BOARD (BOTTOM VIEW) Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only 3-48 3-49 Only for training and service purposes...
  • Page 51 MEMO MEMO LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. 3-50 3-51 Only for training and service purposes...

  • Page 52: Cd Part Electrical

    If PALY, AUDIO PIN10 : DA_LRCK (IC801 PIN60 LRSY) OUTPUT check PIN11 : DA_BCK (IC801 PIN59 DATACLK) PIN12 : DA_DATA0 (IC801 PIN58 DATA) Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 53 22 : CLOSE) Check voltage change LO+, LO- OF IC803 Defective IC803 (PN805 PIN23 : OPEN, PIN22 : CLOSE) Defective mechanism LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 54 18 : FSEQ, 26 : WRQ) PIN3 DI : From DSP to micom PIN15 DO : From micom to DSP Check the waveform #1 Defective IC801 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 55 PIN5, 6 (SP+, SP-) IC802 or IC801 Check PN801 Defective pick up or Is reading OK? PIN14, 15 (TA+, TA-) IC802 or IC801 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 56 #3 focus focus drive coil drive wave wave Defective IC802 Check PN801 connector line Defective PN801 connector Defective pick up focus actuator Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 57 Defective IC801 laser control voltage check Defective Q801 or D801 Check PN801 connector line Defective PN801 connector Defective pick up laser part LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 58 #4 spindle spindle drive motor drive wave wave Defective IC802 Check PN802 connector line Defective PN802 connector Defective pick up spindle motor Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 59 Does FE, TE signal appear? (IC801 Defective pick up or IC801 PIN10 : RFMON, PIN16 : TE) waveform #6 * REMON is FE LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 60: Usb Part Troubleshooting

    STCK : IC805 PIN52, IC801 PIN55 OUTPUT check STREQ : IC805 PIN53, IC801 PIN54 STDATA : IC805 PIN54, IC801 PIN56 Connector check (CN806) Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 61: Waveforms Of Major Check Point

    (PN805 PIN4, 1, 18) during normal play PIN4 : CL PIN4 : CL PIN1 : CE PIN1 : CE PIN18 : FSEQ PIN18 : FSEQ LGE Internal Use Only 4-10 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 62: Sled Drive And Motor Waveform

    There is disc on tray and focus search success disc on tray PIN25 : FAO PIN25 : FAO PIN16 : FA+ PIN16 : FA+ Copyright © 2007 LG Electronics. Inc. All right reserved. 4-11 LGE Internal Use Only Only for training and service purposes...

  • Page 63: Spindle Drive And Motor Waveform

    #6.RF, FOCUS AND TRACKING ERROR WAVEFORM (IC801 PIN2, 10, 16) during normal play PIN2 : RFOUT PIN 16 : TE PIN10 : RFMON(FE) LGE Internal Use Only 4-12 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 64: Schematic Diagrams

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

  • Page 65: Usb Schematic Diagram

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

  • Page 66: Printed Circuit Board Diagram

    PRINTED CIRCUIT BOARD DIAGRAM CD P.C.BOARD (TOP VIEW) (BOTTOM VIEW) Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only 4-17 4-18 Only for training and service purposes...
  • Page 67 MEMO MEMO LGE Internal Use Only 4-19 4-20 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

This manual is also suitable for:

Xc62Xc-u62xXcs62f

Table of Contents