LG DP372D Service Manual
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LG DP372D Service Manual

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Av. Sor Juana lnés de la Cruz No 555
Col. San Lorenzo
Tlalnepantla, Estado de México CP 54033
Tel. 321 19 00 Fax. 5 657549
Lada sin costo 01 800 50 481 00
P/NO : AFN56903654
JULY, 2008
PORTABLE DVD
SERVICE MANUAL
MODEL : DP372D
CAUTION
BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS"
IN THIS MANUAL.
Internal Use Only
Website http://biz.lgservice.com

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  • Page 1 Internal Use Only Website http://biz.lgservice.com PORTABLE DVD SERVICE MANUAL MODEL : DP372D Av. Sor Juana lnés de la Cruz No 555 Col. San Lorenzo Tlalnepantla, Estado de México CP 54033 Tel. 321 19 00 Fax. 5 657549 Lada sin costo 01 800 50 481 00 CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS”...
  • Page 2 CONTENTS SECTION 1..SUMMARY SECTION 2..EXPLODED VIEWS SECTION 3..ELECTRICAL SECTION 4..REPLACEMENT PARTS LIST Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 3: Table Of Contents

    PRODUCT SAFETY SERVICING GUIDELINES FOR PORTABLE DVD PRODUCTS ..1-3 SERVICING PRECAUTIONS ........................1-4 • GENERAL SERVICING PRECAUTIONS • INSULATION CHECKING PRODEDURE • ELECTROSTATICALLY SENSITIVE (ES) DEVICES SPECIFICATIONS ............................1-5 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 4: Product Safety Servicing Guidelines For Portable Dvd Products

    When servicing this product, under no circumstances should the original design be modified or altered without permission from LG Corporation. All components should be replaced only with types identical to those in the original circuit and their physical location, wiring and lead dress must conform to original layout upon completion of repairs.

  • Page 5: Servicing Precautions

    Input terminals, Earphone jacks,etc. tricity sufficient to damage an ES device.) LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 6: Specifications

    - Automotive Adapter (DPDC1) - Remote Control - Battery for Remote Control (Lithium Battery) - Antenna cable - By-pack telescopic antenna Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 7 MEMO LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 8: Exploded Views

    SECTION 2 EXPLODED VIEWS CONTENTS EXPLODED VIEWS .............................2-2 1. CABINET AND MAIN FRAME SECTION ....................2-2 2. PACKING ACCESSORY SECTION......................2-3 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 9: Exploded Views

    EXPLODED VIEWS 1. CABINET AND MAIN FRAME SECTION LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 10: Packing Accessory Section

    801 OWNER'S MANUAL CABLE, CIGAR JACK 804 PACKING SHEET PLUG ASS'Y(RCA CABLE) ADAPTER 803 PACKING REMOTE CONTROL 802B BOX(ACCESSORY) 802A BOX(SWM3) MASTER BOX(DW) Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 11 MEMO LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 12 PRINTED CIRCUIT BOARD DIAGRAMS ..................3-51 1. MAIN P.C.BOARD ..........................3-51 2. LCD P.C.BOARD ..........................3-55 3. INVERTER P.C.BOARD ........................3-55 4. KEY P.C.BOARD ..........................3-57 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 13: Electrical Troubleshooting Guide

    BAT_OUT=12V? D501 Replace working? Check Q303/D301 Check Q304/D302 VCC_5V section and Replace and Replace working? Check Q305/Q306 Replace U301 and Replace LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 14: System Operation Flow

    2. System operation routine loop 1. Stop playback & open Tray 2. Display tray open message & LOGO Receive CLOSE Key? Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 15: System Test Flow

    3. Check FLASH R/W enable signal PRD, Update FLASH successfully? RWR. 4. Check RS232 SIGNALS. 5. Check FLASH Memory related circuit. LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 16 Check the Tray control FAN_TRAY+ & FAN_TRAY- amplifying circuit on Motor driver. signal? Check the cable connection between main PCBA and loader. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 17 Proper Check the amp circuit FCS+ & FCS- on motor driver. outputs? Check cable connect on with pick-up head. LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 18 Check the spindle control & FAN_SPN- output amp circuit of motor driver properly? Check the cable connection between spindle and main PCBA. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 19 TRK+ & TRK- amp circuit on motor driver output properly? Check cable connection on pick-up head. Check RF signal waveform. Disc is play? LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 20 IR.VFD front panel key & lines on 1389P. key functions? 1389P is normally? Check the cable TEST END connection on front panel. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 21 IC MP1411? Check the cable connection on pick-up head. TV_AUDIO/VIDEO Change the TUNER OUTPUT Pin single noraml? TV_MODE TEST END LGE Internal Use Only 3-10 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 22: Details And Waveforms On System Test And Debugging

    R121 C171 C171 + CE110 + CE110 100uF/6.3V 100uF/6.3V + CE111 + CE111 100uF/6.3V 100uF/6.3V R123 R123 CM1117SCM223 FIG 1-2 Copyright © 2008 LG Electronics. Inc. All right reserved. 3-11 LGE Internal Use Only Only for training and service purposes...
  • Page 23 1-4. EEPROM SCK SD33 R209 R209 R210 R210 U203 U203 C210 C210 EEPROM 24C02 EEPROM 24C02 SOP8 SOP8 FIG 1-4 LGE Internal Use Only 3-12 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 24: Sdram Clock

    3. TRAY OPEN/CLOSE SIGNAL S3.3V R332 R332 TROPEN Tray_Open_SW OPEN C321 C321 SW301 SW301 CLOSE SW PUSHBUTTON SW PUSHBUTTON C322 C322 FIG 3-1 Copyright © 2008 LG Electronics. Inc. All right reserved. 3-13 LGE Internal Use Only Only for training and service purposes...

  • Page 25: Sled Control Related Signal

    R326 R326 MGND VINSP VOSL+ VOSP- VOSL- VOSP+ MGND MGND VOTK+ VOTK- 9 10 TRSO FIG 4-2 < CD > LGE Internal Use Only 3-14 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 26: Laser Power Control Related Signal

    6. SPINDLE CONTROL WAVEFORM SP-(4.5V/2.8V) VCC1 FOSO R324 R324 VINFC DMSO R325 R325 VINSL+ SP+(1V/2.8V) MGND VOSL+ VOSL- MGND VOTK+ DMSO(1.65V/0.3V) FIG 6-1 Copyright © 2008 LG Electronics. Inc. All right reserved. 3-15 LGE Internal Use Only Only for training and service purposes...

  • Page 27: Focus On Waveform

    VCC1 FOSO R324 R324 VINFC DMSO R325 R325 VINSL+ MGND VOSL+ VOSL- MGND VOTK+ FOSO FIG 7-2 < CD > LGE Internal Use Only 3-16 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 28: Tracking Control Related Signal(System Checking)

    VINSP 22 MGND VOSP- 21 VOSL+ VOSP+ 20 VOSL- MGND 19 MGND VOTK- 18 VOTK+ TRSO FIG 8-2 < CD > Copyright © 2008 LG Electronics. Inc. All right reserved. 3-17 LGE Internal Use Only Only for training and service purposes...

  • Page 29: Video Output Waveform

    10. AUDIO OUTPUT FROM 1389P JP406 JP406 C429 C429 ST-066 ST-066 ESD(15pF) ESD(15pF) C421 C421 C428 C428 680pF 680pF 680pF 680pF FIG 10-1 LGE Internal Use Only 3-18 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 30: Wiring Connection Diagrams

    WIRING CONNECTION DIAGRAMS 1. WIRING CONNECTION DIAGRAM-1 (MAIN PCB <---> LCD & INVERTOR PCB) INVERTOR PCB LCD PCB MAIN PCB Copyright © 2008 LG Electronics. Inc. All right reserved. 3-19 LGE Internal Use Only Only for training and service purposes...

  • Page 31: Wiring Connection Diagram-2

    2. WIRING CONNECTION DIAGRAM-2 (MAIN PCB <---> KEY PCB) key P y PCB MAIN PCB LGE Internal Use Only 3-20 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 32: Block Diagrams

    BLOCK DIAGRAMS 1. OVERALL BLOCK DIAGRAM Copyright © 2008 LG Electronics. Inc. All right reserved. 3-21 LGE Internal Use Only Only for training and service purposes...

  • Page 33: Power Block Diagram

    2. POWER BLOCK DIAGRAM LGE Internal Use Only 3-22 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 34: Servo Block Diagram

    3. SERVO BLOCK DIAGRAM Copyright © 2008 LG Electronics. Inc. All right reserved. 3-23 LGE Internal Use Only Only for training and service purposes...

  • Page 35: System Block Diagram

    4. SYSTEM BLOCK DIAGRAM LGE Internal Use Only 3-24 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 36: Av Block Diagram

    5. AV BLOCK DIAGRAM Copyright © 2008 LG Electronics. Inc. All right reserved. 3-25 LGE Internal Use Only Only for training and service purposes...

  • Page 37: Lcd Block Diagram

    6. LCD BLOCK DIAGRAM LGE Internal Use Only 3-26 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 38: Circuit Diagrams

    CN101 100uF/6.3V 100uF/6.3V Crystal R123 R123 Wednesday, January 02, 2008 Wednesday, January 02, 2008 Wednesday, January 02, 2008 CM1117SCM223 3-27 3-28 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 39: Memory Circuit Diagram

    SOP8 MALATA MALATA MALATA 02.MEMORY 02.MEMORY 02.MEMORY Wednesday, January 02, 2008 Wednesday, January 02, 2008 Wednesday, January 02, 2008 3-29 3-30 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 40: Opu & Motor Circuit Diagram

    03.OPU & MOTOR 03.OPU & MOTOR 03.OPU & MOTOR Wednesday, January 02, 2008 Wednesday, January 02, 2008 Wednesday, January 02, 2008 3-31 3-32 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 41: Av Circuit Diagram

    MALATA MALATA LCD I/F 04.AV 04.AV 04.AV Wednesday, January 02, 2008 Wednesday, January 02, 2008 Wednesday, January 02, 2008 3-33 3-34 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 42: Charge Circuit Diagram

    FB505 FB505 FB1206 FB1206 05.CHARGE 05.CHARGE 05.CHARGE Wednesday, January 02, 2008 Wednesday, January 02, 2008 Wednesday, January 02, 2008 3-35 3-36 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 43: Lcd If Circuit Diagram

    MALATA 06.LCD I/F 06.LCD I/F 06.LCD I/F Wednesday, January 02, 2008 Wednesday, January 02, 2008 Wednesday, January 02, 2008 3-37 3-38 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 44: Tuner Circuit Diagram

    CKX-3.5-02 MALATA MALATA MALATA 07.TUNER 07.TUNER 07.TUNER Wednesday, January 02, 2008 Wednesday, January 02, 2008 Wednesday, January 02, 2008 3-39 3-40 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 45: Menu Key Circuit Diagram

    K811 K809 K809 K810 K810 K812 K812 Thursday, December 06, 2007 Thursday, December 06, 2007 Thursday, December 06, 2007 3-41 3-42 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 46: Led Driver Circuit Diagram

    MP2359 LED Driver Application MP2359 LED Driver Application Wednesday, August 29, 2007 Wednesday, August 29, 2007 Wednesday, August 29, 2007 3-43 3-44 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 47: Front Key Circuit Diagram

    100pF 2.Anode 3.Cathode 100pF 100pF 100pF 100pF Monday, October 22, 2007 Monday, October 22, 2007 Monday, October 22, 2007 3-45 3-46 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 48: Circuit Voltage Chart

    3.25 3.32 3.28 3.24 3.24 2.17 2.21 3.24 3.24 3.23 2.25 2.35 3.34 3.34 3.34 3.24 3.24 1.77 1.85 3-47 3-48 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 49 1.92 1.86 2.46 2.45 Q409 CE316 Source U504(R5460N208AA) 2.44 Emitter 4.97 5.08 Drain 6.49 5.14 5.09 CE111 Collector 4.98 3-49 3-50 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 50: Printed Circuit Board Diagrams

    PRINTED CIRCUIT BOARD DIAGRAMS 1. MAIN P.C.BOARD (TOP VIEW) 3-51 3-52 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 51 MAIN P.C.BOARD (BOTTOM VIEW) 3-53 3-54 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 52: Lcd P.c.board

    2. LCD P.C.BOARD (TOP VIEW) (BOTTOM VIEW) 3. INVERTER P.C.BOARD (TOP VIEW) (BOTTOM VIEW) 3-55 3-56 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 53: Key P.c.board

    4. KEY P.C.BOARD (TOP VIEW) (BOTTOM VIEW) 3-57 3-58 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

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