LG DP391B Service Manual
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LG DP391B Service Manual

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Internal Use Only
Website http://biz.lgservice.com
PORTABLE DVD
SERVICE MANUAL
MODEL: DP391B/DP392G
CAUTION
BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS"
IN THIS MANUAL.
P/NO : AFN56903624
MARCH, 2008

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  • Page 1 Internal Use Only Website http://biz.lgservice.com PORTABLE DVD SERVICE MANUAL MODEL: DP391B/DP392G CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL. P/NO : AFN56903624 MARCH, 2008...
  • 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

    SERVICING PRECAUTIONS ........................1-4 • GENERAL SERVICING PRECAUTIONS • INSULATION CHECKING PRODEDURE • ELECTROSTATICALLY SENSITIVE (ES) DEVICES UPGRADING FIRMWARE .........................1-5 SPECIFICATIONS ............................1-7 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 Video 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

    Note 1: Accessible Conductive Parts include Metal panels, electricity sufficient to damage an ES device.) Input terminals, Earphone jacks,etc. LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 6: Upgrading Firmware

    If you don”t change the file name like that, Disc download isn”t be worked. 7. Copy the changed file to a USB memory stick. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 7 15.Remove the USB memory stick. 16.Turn on the DVD-player. Select the initial Language and Press “Enter” button. Then, Select “Enter” and Press “Enter” button. LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 8: Specifications

    • SUPPLIED ACCESSORIES RCA Audio/Video cable AC Adapter (MPA-630A) Car Adapter (WLD-041) USB Cable Remote control Battery for Remote control (Lithium) Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 9 MEMO LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 10 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 11 1. CABINET AND MAIN FRAME SECTION CAUTION) Do not reuse the battery cell, after separating the battery cell from the battery case. LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 12 808 BATTERY 801 OWNER'S MANUAL CABLE, USB 804 PACKING SHEET PLUG ASS'Y(RCA CABLE) 833 CORD 803 BAG REMOTE CONTROL 802B 802A Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 13 MEMO LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 14 5. SPINDLE CONTROL WAVEFORM 2. MAIN KEY P.C.BOARD........3-67 (NO DISC CONDITION).......3-30 3. MIS P.C.BOARD ..........3-69 6. TRACKING CONTROL RELATED SIGNAL (SYSTEM CHECKING) ........3-31 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 15: Lcd Part

    RGB signal output? G : 49, 50, 52, 53, 54, 55 B : 38, 40, 42, 43, 44, 45 VOCM level(3.3V)? Check L802 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 16: Wiring Connection Diagram

    WIRING CONNECTION DIAGRAM LCD PCB <---> KEY PCB, BACK LIGHT, LCD PANNEL LCD Pannel LCD PCB Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 17: Interface Diagram

    LCD PCB <---> KEY PCB INTERFACE J807 J901 KEY data R/C d ata LED_G LED_G LED Control LED_R LED_R LED_B LED_B Power LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 18: Block Diagram

    BLOCK DIAGRAM Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 19 MEMO LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 20: Circuit Diagrams

    07.LCD I/F 07.LCD I/F 07.LCD I/F Friday , February 15, 2008 Friday , February 15, 2008 Friday , February 15, 2008 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 21: Panel I/F Circuit Diagram

    CON4_1.0MM LED_POWER 08.PANEL I/F 08.PANEL I/F 08.PANEL I/F Friday, February 15, 2008 Friday, February 15, 2008 Friday, February 15, 2008 3-10 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 22: Front Key Board Circuit Diagram

    BLUE BLUE BLUE BLUE 09.KEY 09.KEY 09.KEY Friday, February 15, 2008 Friday, February 15, 2008 Friday, February 15, 2008 3-11 3-12 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 23: Lcd Backlight Circuit Diagram

    11. LCD Backlight 11. LCD Backlight 11. LCD Backlight Friday, February 15, 2008 Friday, February 15, 2008 Friday, February 15, 2008 3-13 3-14 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 24: Printed Circuit Board Diagrams

    (TOP VIEW) (BOTTOM VIEW) 2. FRONT KEY P.C.BOARD 3. BACK-LIGHT P.C.BOARD (TOP VIEW) (TOP VIEW) (BOTTOM VIEW) (BOTTOM VIEW) 3-15 3-16 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 25 MEMO MEMO 3-17 3-18 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 26: Main Part

    No +5V No LCD power Is U204 Replace U204 Replace U401 Replace U704 3.3V OK? Is U401 Replace U401 3.3V OK? Copyright © 2008 LG Electronics. Inc. All right reserved. 3-19 LGE Internal Use Only Only for training and service purposes...
  • Page 27 Q510 and Q519 (U501 IC) Check Is speakers OK. Speakers U701 Pin 14 Replace Replace IC(U502) Refer to LCD part LGE Internal Use Only 3-20 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 28 Check SW402 switch Check the connectin of MD. Check IC(U203) Pin 130 Refer to SERVO part. Refer to SERVO part. Copyright © 2008 LG Electronics. Inc. All right reserved. 3-21 LGE Internal Use Only Only for training and service purposes...

  • Page 29: Mpeg Circuit

    Is Clock normal? Does Does the audio the audio sound output Check clock signal signal output from MPEG normally? decoder? LGE Internal Use Only 3-22 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 30: Rf/Servo Circuit

    U203. signal on U203 Check the cable connection Replace IC(U203) between spindle and main PCBA. Copyright © 2008 LG Electronics. Inc. All right reserved. 3-23 LGE Internal Use Only Only for training and service purposes...
  • Page 31 Check cable connection on pick-up head. Disc is play? Check RF signal waveform. LGE Internal Use Only 3-24 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 32 U203 key functions. U203 & Front µ-com is normally. Check the cable connection TEST END on Front pannel. Copyright © 2008 LG Electronics. Inc. All right reserved. 3-25 LGE Internal Use Only Only for training and service purposes...

  • Page 33: Chargeing Circuit

    Is F601 OK? Replace F601. Is IC(U601) OK? Replace IC(U601). Is L602 OK? Replace L602. Is U603 OK? Replace IC(U603). LGE Internal Use Only 3-26 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 34: Details And Waveforms On System Test And Debugging

    1) ZR36966 main clock is at 27MHz (X201) FIG 1-1 2. SDRAM CLOCK 1) ZR36966 main clock is at 27MHz (R308) FIG 2-1 Copyright © 2008 LG Electronics. Inc. All right reserved. 3-27 LGE Internal Use Only Only for training and service purposes...

  • Page 35: Disc Type Judgement Waveform

    3. DISC TYPE JUDGEMENT WAVEFORM F+(U401 PIN8) RFL(J401 PIN9) FIG 3-1 F+(U401 PIN8) RFL(J401 PIN9) FIG 3-2 LGE Internal Use Only 3-28 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 36 F+(U401 PIN8) RFL(J401 PIN9) FIG 3-3 F+(U401 PIN8) RFL(J401 PIN9) FIG 3-4 Copyright © 2008 LG Electronics. Inc. All right reserved. 3-29 LGE Internal Use Only Only for training and service purposes...

  • Page 37: Focus On Waveform

    F+(U401 PIN8) F-(U401 PIN9) FIG 4-1 5. SPINDLE CONTROL WAVEFORM (NO DISC CONDITION) DMSO(U401 PIN12) SP-(U401 PIN15) SP+(U401 PIN14) FIG 5-1 LGE Internal Use Only 3-30 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 38: Tracking Control Related Signal (System Checking)

    6. TRACKING CONTROL RELATED SIGNAL (SYSTEM CHECKING) TRSO(U401 PIN23) T-(U401 PIN18) T+(U401 PIN17) FIG 6-1 TRSO(U401 PIN23) T-(U401 PIN18) T+(U401 PIN17) FIG 6-2 Copyright © 2008 LG Electronics. Inc. All right reserved. 3-31 LGE Internal Use Only Only for training and service purposes...

  • Page 39: Lcd Drive Ic(U701) System Clock (27Mhz)

    7. LCD DRIVE IC(U701) SYSTEM CLOCK (27MHz) FIG 7-1 8. ZR36966 VIDEO OUTPUT WAVEFORM 1) Full colorbar signal (CVBS) (U501 PIN13) FIG 8-1 LGE Internal Use Only 3-32 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 40: Audio Output From Audio Dac

    MR 1kHz 0dB (JK601 PIN4, 5) FIG 9-1 2) Audio related Signal Audio R+ (U203 PIN113) Audio R- (U203 PIN114) FIG 9-2 Copyright © 2008 LG Electronics. Inc. All right reserved. 3-33 LGE Internal Use Only Only for training and service purposes...

  • Page 41: Wiring Connection Diagrams

    WIRING CONNECTION DIAGRAMS 1. OVERALL CONNECTION LAYOUT DIAGRAM LCD Panel LCD PCB Main TOP Key PC TOP Key PCB Speaker Main Chassis LGE Internal Use Only 3-34 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 42: Wiring Connection Diagram-1

    2. WIRING CONNECTION DIAGRAM-1 (MAIN PCB <---> KEY PCB, Battery, Speaker) Copyright © 2008 LG Electronics. Inc. All right reserved. 3-35 LGE Internal Use Only Only for training and service purposes...

  • Page 43: Wiring Connection Diagram-2

    3. WIRING CONNECTION DIAGRAM-2 (MAIN PCB <---> LCD PCB) Main LCD PCB LGE Internal Use Only 3-36 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 44: Internal Block Diagram Of Ics

    Driver(6X) DC-DC II Vcc1 MGND MGND COMP2 IPK2 PVCC1 PVCC2 VOFC+ VOFC- VCC1 VINFC VINSL+ MGND VOSL+ VOSL- MGND VOTK+ Copyright © 2008 LG Electronics. Inc. All right reserved. 3-37 LGE Internal Use Only Only for training and service purposes...
  • Page 45 Notes) Symbol of + and - (output of drivers) means polarity to input pin. (For example, if voltage of pin10 is high, pin11 is high.) LGE Internal Use Only 3-38 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 46: Lcd Drive Ic(T103)

    GNDP GPIO3/VDT9/CC_VSO FILT GPIO2/VDT17/VDT10/CC_B/AP VPLL GPIO1/VDT11/CC_G/Q1H (Dec. 2005) AVDDP GPIO0/VDT12/CC_R GNDP PWM3/VDT8/CC_HSO SOYIN PWM2/VDT16/VDT13/CC_BOX VREF PWM1/VDT14/CC_Y AVDDDAC IR1/VDT15/CC_CKO GNDAC XCLK2MC Copyright © 2008 LG Electronics. Inc. All right reserved. 3-39 LGE Internal Use Only Only for training and service purposes...
  • Page 47 DIO, P/D sPanel_VSync sDEN DIO, P/D sPanel_DEN sD0~sD7 49~50, 52~57 DIO, P/D sPanel_Data CLKO DIO, P/D sPanel clock LGE Internal Use Only 3-40 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 48 Video clock of 16-bit 601 LODD/LVSYNC DI, P/D ITU-601 Odd or VSync input LHREF/LHSYNC DI, P/D ITU-601 HREF(HDE) or HSync input Copyright © 2008 LG Electronics. Inc. All right reserved. 3-41 LGE Internal Use Only Only for training and service purposes...
  • Page 49 Operation clock output for closed caption or external OSD when (panel is TTL 6 bits or sPanel) and (digital video input is ITUR656 or CCIR601_8 bits) LGE Internal Use Only 3-42 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 50: Volume Controller Ic(Pt2257)

    Power Supply Right Output Channel Connect a Capacitor to Audio Output Right Input Channel Connect a Capacitor to Audio Source Copyright © 2008 LG Electronics. Inc. All right reserved. 3-43 LGE Internal Use Only Only for training and service purposes...

  • Page 51: Speaker Amp Ic(Pt2303)

    Ground Output mode select, connected to the VDD for SE HP-IN mode or GND for BTL mode No Connect 9~12 LGE Internal Use Only 3-44 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 52: Micom Ic(Gt6319)

    AD_BATU AD_CHGI Bat Current Samp. AD_K1 AD_PR Adapter Voltage Samp. Control signals out PWM Out Vref Input VREF PR_CTL1 PR_CTL2 Copyright © 2008 LG Electronics. Inc. All right reserved. 3-45 LGE Internal Use Only Only for training and service purposes...
  • Page 53 SPI Module Clock port MSDO SPI Module Data out port MSDI SPI Module Data in port For expansion IR_DA Infrared input port LGE Internal Use Only 3-46 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 54: Interface Diagram

    LED_POWER LED_POWER Backlight LED_POWER LED_POWER power 3.3V 3.3V 3.3V 3.3V power Key PCB LED_B LED_B LCD PC D PCB Copyright © 2008 LG Electronics. Inc. All right reserved. 3-47 LGE Internal Use Only Only for training and service purposes...

  • Page 55: Block Diagrams

    BLOCK DIAGRAMS 1. OVERALL BLOCK DIAGRAM LGE Internal Use Only 3-48 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 56: Power Block Diagram

    2. POWER BLOCK DIAGRAM Copyright © 2008 LG Electronics. Inc. All right reserved. 3-49 LGE Internal Use Only Only for training and service purposes...

  • Page 57: Mpeg Block Diagram

    3. MPEG BLOCK DIAGRAM LGE Internal Use Only 3-50 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 58: Disc Block Diagram

    4. DISC BLOCK DIAGRAM Copyright © 2008 LG Electronics. Inc. All right reserved. 3-51 LGE Internal Use Only Only for training and service purposes...

  • Page 59: Av Block Diagram

    5. AV BLOCK DIAGRAM LGE Internal Use Only 3-52 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 60: Circuit Diagrams

    SCLK 02.MPEG 02.MPEG 02.MPEG Friday , February 15, 2008 Friday , February 15, 2008 Friday , February 15, 2008 3-53 3-54 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 61: Memory Circuit Diagram

    R305 R305 SFCLK 03.MEMORY 03.MEMORY 03.MEMORY SFDO Friday, February 15, 2008 Friday, February 15, 2008 Friday, February 15, 2008 3-55 3-56 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 62: Opu & Motor Circuit Diagram

    04.OPU & MOTOR 1000pF(NC) 1000pF(NC) J402 J402 CON6_1.5MM_DIP_B CON6_1.5MM_DIP_B Friday, February 15, 2008 Friday, February 15, 2008 Friday, February 15, 2008 3-57 3-58 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 63: Av Circuit Diagram

    MPEG I/F 05.AV 05.AV 05.AV SMBT3904 SMBT3906 Friday, February 15, 2008 Friday, February 15, 2008 Friday, February 15, 2008 3-59 3-60 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 64: Charge Circuit Diagram

    0.1uF 0.1uF 0.1uF 0.1uF 06.CHARGE 06.CHARGE 06.CHARGE Friday, February 15, 2008 Friday, February 15, 2008 Friday, February 15, 2008 3-61 3-62 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 65: Main Key Circuit Diagram

    10. MAIN KEY 10. MAIN KEY 10. MAIN KEY Friday, February 15, 2008 Friday, February 15, 2008 Friday, February 15, 2008 3-63 3-64 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 66: Circuit Voltage Chart

    CM417 47uF/16V 3.29V 3.28V power supply output with Vo = -Vi -4.8V power supply input 4.96V 1.8V ~ 5.25V 3-65 3-66 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 67: Printed Circuit Board Diagrams

    PRINTED CIRCUIT BOARD DIAGRAMS 1. MAIN P.C.BOARD (TOP VIEW) 2. MAIN KEY P.C.BOARD (TOP VIEW) (BOTTOM VIEW) 3-67 3-68 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 68: Mis P.c.board

    MAIN P.C.BOARD (BOTTOM VIEW) 3. MIS P.C.BOARD (TOP VIEW) (BOTTOM VIEW) 3-69 3-70 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 69 MEMO MEMO 3-71 3-72 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

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