LG XB12 Service Manual
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LG XB12 Service Manual

Mini home theater
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See also: Owner's Manual
Internal Use Only
Website http://biz.lgservice.com
MINI HOME THEATER
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS" IN THIS MANUAL.
MODEL : XB12(XBS12V)
P/NO : AFN35036924
SEPTEMBER, 2007

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Summary of Contents for LG XB12

  • Page 1 Internal Use Only Website http://biz.lgservice.com MINI HOME THEATER SERVICE MANUAL CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL. MODEL : XB12(XBS12V) P/NO : AFN35036924 SEPTEMBER, 2007...

  • Page 2: Table Of Contents

    • REPLACEMENT PARTS LIST..........4-1 - 1-1 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only...

  • 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. - 1-2 - LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 4 2. If you wish to operate the RESET jump wire, it is necessary to unplug the power cord. - 1-3 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 5: Esd Precautions

    THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SER- VICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERA- TURE. - 1-4 - LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 6: Location Of Users Controls

    • TUNING (+)- Tuner CD SKIP/ SCAN ( • Volume control knob 4. PORTABLE IN Jack Using PORTABLE device - 1-5 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 7: Remote Control

    • TUN. -/+ ( 15. DISPLAY • SELECT/ ENTER 16.• MUTE( 8. MENU Accesses the menu on a DVD disc. - 1-6 - LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 8: Service Information For Eeprom

    6. Then, to change to E2P CLR status push Remote '2' key and Front 'STOP' at the same time, and set power off, then option settings are done successfully. - 1-7 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 9: Specification

    150 X 150 X 150 mm Net Weight 1.05 kg Designs and specifications are subject to change without notice. - 1-8 - LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 10: Cabinet And Main Frame Section

    CABINET AND MAIN FRAME SECTION SAFETY INFORMATION IN SERVICE LITERATURE. CABLE3 FRONT MAIN CABLE1 CABLE2 Copyright © 2007 LG Electronics. Inc. All right reserved. - 2-1 - - 2-2 - LGE Internal Use Only Only for training and service purposes...
  • Page 11 LGE Internal Use Only - 2-3 - - 2-4 - Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 12: Speaker Exploded View

    SPEAKER EXPLODED VIEW MODEL: XBS12V A80A A80B WIRE80 - 2-5 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 13: Packing Accessory View

    825 Antenna (FM) 808 Battery 900 Remote Control 803 Packing 801 Instruction Ass'y 803 Packing 804 Bag 802 Box - 2-7 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 14 - 2-8 - LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 15: Electical Troubleshooting Guide

    IS the D953 Replace the D953. normal? Is there about 2.5V at the Replace the IC950. IC950 Pin1? - 3-1 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 16 Is the IC952 Check the P CTL “H” pin4 ‘H’? signal from µ-com. Check or Replace the IC952. - 3-2 - LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 17 CHECK IC702 PIN3 CHECK OUTPUT IC702. CHECK SMPS. = 10V. CHECK PATH FROM CHECK OUTPUT JK701. IC702 TO JK701. - 3-3 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 18 Pin117,123,124,1. (Pin1,2,3,4). Check IC507 Check Output Pin9=5V. IC507 Pin7,10. Check Input for IC701 (Pin6,23). Check Output IC701 (Pin12,17). - 3-4 - LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 19 CHECK CLK DATA BY CHECK IC104 CHANGE FUNCTION CLK DATA PIN14,15. FROM TUNER TO PORTABLE CHECK CONTROL CHANGE IC701. FUNCTION. - 3-5 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 20 SDRAM operates (IC503). SDRAM and ES8380. properly? Check Replace ES8380 ES8380 operates Pin133,134,137,138,13 (IC501). properly? 9,140 of ES8380. - 3-6 - LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 21 Replace the F901. Pin collector of Q405& Q406 (Use the same Fuse) is OK? Check P400 connec- tion to pickup. - 3-7 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 22 NO Check related circuit of Proper FOD signal on IC401 ES8380 Focus Signal. pin5? Check P400 connec- tion with pickup. - 3-8 - LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 23 Q503. Refer on DVD/ USB Function All output OK? Video Output OK? Audio Abnormal Checking. - 3-9 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 24: Waveforms Of Major Check Point

    2. RX 3. TX 4. LCS3#(FLASH) Playing at USB function 1. HRST# 2. 5V 3. D- 4. D+ - 3-10 - LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 25 3. STARTING ACTION WAVEFORM IN MD DEVICE 1. SLO(from MPEG ) 2. SLED- 3. SLED+ (At Power on) - 3-11 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 26 1. FDO 2. F+ 3. F- (INSERT CD ) (INSERT DVD ) 1. FDO 2. F+ 3. F- - 3-12 - LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 27 1. Spind 2. Spin+ 3. Spin- 6.AT FIRST ACTION,FOCUS SIGNAL A,B,C,D 1. A 2. B 3. C 4. D - 3-13 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 28: Tracking Signal

    7. TRACKING SIGNAL 1. Tro 2. Tr- 3. Tr+ 8.RF WAVEFORM - 3-14 - LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 29: Disk Type Jugement Waveform

    9. DISK TYPE JUGEMENT WAVEFORM (DVD) 1. F+ 2. FDO 3. SVRRF (CD) - 3-15 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 30: Internal Block Diagram Of Ics

    INTERNAL BLOCK DIAGRAM OF ICs IC78960NW-E BIOCK DIAGRAM - 3-16 - LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 31 IC78960NW-E 2) PIN CONFIGURATION - 3-17 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 32 LC87F5M64A BIOCK DIAGRAM - 3-18 - LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 33 LC87F5M64A 2) PIN CONFIGURATION - 3-19 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 34 PT6524 BIOCK DIAGRAM - 3-20 - LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 35 PT6524 2) PIN CONFIGURATION - 3-21 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 36 - 3-22 - LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 37: Wiring Diagram

    WIRING DIAGRAM Copyright © 2007 LG Electronics. Inc. All right reserved. - 3-23 - - 3-24 - LGE Internal Use Only Only for training and service purposes...
  • Page 38 9V (78R09) PWM IC P7102 5V(P-SENS) ZNR & 5.6VA (KIA278R05) FILTER AC INPUT FEED BACK LGE Internal Use Only - 3-25 - - 3-26 - Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 39: Block Diagram

    AMPLIFIER -A_MUTE MODULE -AMP_STBY TDA7468D LC78692N FUNCTION SANYO DSP PICK-UP PORTABLE INPUT AM5810 SERVO IC Copyright © 2007 LG Electronics. Inc. All right reserved. - 3-27 - - 3-28 - LGE Internal Use Only Only for training and service purposes...

  • Page 40: Schematic Diagrams

    With respect to risk of fire or NOTES) Symbol denotes DC chassis ground. 2007. 08. 24 NOTE) electricial shock. LGE Internal Use Only - 3-29 - - 3-30 - Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 41 2. MAIN SCHEMATIC DIAGRAM 2007. 08. 24 Copyright © 2007 LG Electronics. Inc. All right reserved. - 3-31 - - 3-32 - LGE Internal Use Only Only for training and service purposes...

  • Page 42: Front Schematic Diagram

    3. FRONT SCHEMATIC DIAGRAM 2007. 08. 24 LGE Internal Use Only - 3-33 - - 3-34 - Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 43: Schematic Diagrams

    4. MPEG SCHEMATIC DIAGRAM 2007. 08. 24 Copyright © 2007 LG Electronics. Inc. All right reserved. - 3-35 - - 3-36 - LGE Internal Use Only Only for training and service purposes...
  • Page 44 5. MOTOR/SERVO SCHEMATIC DIAGRAM 2007. 08. 24 LGE Internal Use Only - 3-37 - - 3-38 - Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 45: Printed Circuit Diagrams

    Parts that are shaded are critical NOTES) with respect to risk of fire or NOTES) electricial shock. Copyright © 2007 LG Electronics. Inc. All right reserved. - 3-39 - - 3-40 - LGE Internal Use Only Only for training and service purposes...
  • Page 46 2. FRONT P.C. BOARD (TOP VIEW) LGE Internal Use Only - 3-41 - - 3-42 - Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 47 FRONT P.C. BOARD (BOTTOM VIEW) Copyright © 2007 LG Electronics. Inc. All right reserved. - 3-43 - - 3-44 - LGE Internal Use Only Only for training and service purposes...
  • Page 48 LGE Internal Use Only - 3-45 - - 3-46 - Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

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