LG DP351G Service Manual
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LG DP351G Service Manual

LG DP351G 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 : AFN56903641
APRIL, 2008
PORTABLE DVD
SERVICE MANUAL
MODEL: DP351G
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: DP351G 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 CAUTION Lada sin costo 01 800 50 481 00 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 VIDEO 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 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: Specifications

    - RCA Video/Audio cable - AC Adapter (MPA-630) - Automotive Adapter (DPDC1) - Remote Control - Battery for Remote Control (Lithium Battery) 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

    808 BATTERY CABLE, CIGAR JACK 801 OWNER'S MANUAL PLUG ASS'Y(RCA CABLE) 804 PACKING SHEET ADAPTER 803 PACKING REMOTE CONTROL 802B 802A 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 7. KEY MENU CIRCUIT DIAGRAM ......................3-51 • CIRCUIT VOLTAGE CHART ......................3-53 PRINTED CIRCUIT BOARD DIAGRAMS ..................3-57 1. MAIN P.C.BOARD ..........................3-57 2. KEY MENU P.C.BOARD ........................3-61 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 13: Lcd Part

    L9020R, L901, D901, D902 check +15V, -10V TFT LCD normal? Replace Color Readjust as adjustement standard adjusting normal? Each connector? Replace and Reassemble Replace LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 14: Block Diagram

    KEYPAD BLOCK •KEY-PLAY •MP2359 IC BACKLIGHT •DVD_KEY1 •DVD_KEY2 KEY-PLAY •DVD_KEY3 DVD_KE Y1 •DVD_KEY4 DVD_KE Y2 •DVD_KEY5 DVD_KE Y3 DVD_KE Y4 DVD_KE Y5 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 15: Circuit Diagram

    R952 R953 R953 6.8 1% 6.8 1% Friday, November 30, 2007 Friday, November 30, 2007 Friday, November 30, 2007 TP917 TP917 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 16: Printed Circuit Board Diagram

    PRINTED CIRCUIT BOARD DIAGRAM MEMO (TOP VIEW) (BOTTOM VIEW) Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 17 MEMO MEMO 3-10 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 18: Main Part

    3.3V OK? Replace U401 Replace U401 Replace U401 Is U202 1.8V OK? Is Q402 5V OK? Replace U202 Replace U202 Copyright © 2008 LG Electronics. Inc. All right reserved. 3-11 LGE Internal Use Only Only for training and service purposes...
  • Page 19 Refer to SERVO part Refer to SERVO part Check DCLK signal of MPEG part Replace B/D Check MPEG (IC U201) Replace B/D LGE Internal Use Only 3-12 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 20 Check SW201, SW202 switch Check IC(U201) Pin92 Check the connectin of MD. Refer to SERVO part. Refer to SERVO part. Copyright © 2008 LG Electronics. Inc. All right reserved. 3-13 LGE Internal Use Only Only for training and service purposes...

  • Page 21: 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 3-14 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 22: Rf/Servo Circuit

    Proper DMSO signal Does spindle rotate. on MT1389. on MT1389 Check the cable connection Replace IC(U201) between spindle and main PCBA. Copyright © 2008 LG Electronics. Inc. All right reserved. 3-15 LGE Internal Use Only Only for training and service purposes...
  • Page 23 Check cable connection on pick-up head. Disc is play? Check RF signal waveform. LGE Internal Use Only 3-16 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 24 IR.VFD Front pannel key & on MT1389 key functions. MT1389 & Front µ-com is normally. Check the cable connection TEST END on Front pannel. Copyright © 2008 LG Electronics. Inc. All right reserved. 3-17 LGE Internal Use Only Only for training and service purposes...

  • Page 25: Charging Circuit

    Is L601 OK? Replace L601. Is IC(U601) OK? Replace IC(U601). Is L602 OK? Replace L602. Is IC(U603) OK? Replace IC(U603). LGE Internal Use Only 3-18 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 26: Details And Waveforms On System Test And Debugging

    1) MT1379 main clock is at 27MHz (X201) FIG 1-1 2. SDRAM CLOCK 1) MT1389 main clock is at 27MHz (R308) DCLK=125MHz, Vp-p=3.7V U301 PIN38 FIG 2-1 Copyright © 2008 LG Electronics. Inc. All right reserved. 3-19 LGE Internal Use Only Only for training and service purposes...

  • Page 27: Disc Type Judgement Waveform

    3. DISC TYPE JUDGEMENT WAVEFORM F+(U401 PIN8) FE(U201 PIN26) RFL(U201 PIN21) FIG 3-1 F+(U401 PIN8) FE(U201 PIN26) RFL(U201 PIN21) FIG 3-2 LGE Internal Use Only 3-20 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 28 F+(U401 PIN8) FE(U201 PIN26) RFL(U201 PIN21) FIG 3-3 F+(U401 PIN8) FE(U201 PIN26) RFL(U201 PIN21) FIG 3-4 Copyright © 2008 LG Electronics. Inc. All right reserved. 3-21 LGE Internal Use Only Only for training and service purposes...

  • Page 29: 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 3-22 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 30: Tracking Control Related Signal (System Checking)

    TE(U201 PIN27) TRSO(U401 PIN23) T-(U401 PIN18) T+(U401 PIN17) FIG 6-1 TE(U201 PIN27) TRSO(U401 PIN23) T-(U401 PIN18) T+(U401 PIN17) FIG 6-2 Copyright © 2008 LG Electronics. Inc. All right reserved. 3-23 LGE Internal Use Only Only for training and service purposes...

  • Page 31: Mt1389 Audio Optical And Coaxial Output (Aspdif)

    ASDIF Vpp=2.5V (U201 PIN208) FIG 7-1 8. MT1389 VIDEO OUTPUT WAVEFORM 1) Full colorbar signal (CVBS) (U501 PIN14) FIG 8-1 LGE Internal Use Only 3-24 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 32: Audio Output From Audio Dac

    MR 1kHz 0dB (JK601 PIN4, 5) FIG 9-1 2) Audio related Signal ASDATA3 ASDAT0(IC301 PIN3) ABCK(IC301 PIN4) ALRCK(IC5301 PIN5) FIG 9-2 Copyright © 2008 LG Electronics. Inc. All right reserved. 3-25 LGE Internal Use Only Only for training and service purposes...

  • Page 33: Wiring Connection Diagrams

    1. WIRING CONNECTION DIAGRAMS-1 MAIN PCB LCD PCB 0.8-12Y-12Y-220mm (MAIN PCB <----> LCD PCB) 0.8-20Y-20Y-220mm LCD PCB LCD PCB MAIN PCB MAIN PCB LGE Internal Use Only 3-26 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 34: Wiring Connection Diagrams-2

    2. WIRING CONNECTION DIAGRAMS-2 (MAIN PCB <----> KEY PCB) KEY PCB KEY PCB MAIN PCB MAIN PCB KEY PCB 1.0-10Y-10Y-80mm Copyright © 2008 LG Electronics. Inc. All right reserved. 3-27 LGE Internal Use Only Only for training and service purposes...
  • Page 35 MEMO LGE Internal Use Only 3-28 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 36: Block Diagrams

    BAT_OUT /M_RESET DC_IN STANDBY AD_PR SM9926K GT6312 AD_U APM4953K AD_T AD_I RED, AD_K GREEN REMOCON Power, RECEIVER Charge LED 3-29 3-30 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 37: Power Block Diagram

    Standby DC-DC Audio Battery out t AM5898N A+5V RCR2561 7.5V System 3.3V 3.3V 1.8V -10V 7.5V -10V Panel 1.8V 3-31 3-32 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 38: Servo Block Diagram

    CD : A,B,C,D,E,F,RF FO+, FO-, TR+, TR- LIMIT Stepping SL-,SL+ FMSO,DMSO,FOSO, Moter TRSO,STBY,V1P4 U401 AM5898N Motor Driver Spindle SP-,SP+ Moter OP+,OP- 3-33 3-34 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 39: System Block Diagram

    IROUT DVD_K1,DVD_K2,DVD_K3, DVD_K4,DVD_K5 KEY1 LCD MODE,DISPLAY,SETUP,MENU UP,DOWN,LEFT,RIGHT,ENTER REMOCON GT6312 POWER,PLAY/PAUSE,REW,FF,STOP, RECEIVER AD_KEY COLOR/BRIGHT KEY2 RED, GREEN Power, Charge LED 3-35 3-36 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 40: Av Block Diagram

    2CH DAC NJM4580M OP-AMP A+5V SP_L+/L- VOLUME PT2303 SP_R+/R- SP_L-/R- H/P JACK ML_OUT,MR_OUT SP_L-/R- SDA,SCL, H/P JACK MT1389DE/LP MPEG 3-37 3-38 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 41: Circuit Diagrams

    DVD_KEY3 DVD_KEY4 DVD_KEY4 DVD_KEY5 DVD_KEY5 DVD_KEY6 Thursday, December 20, 2007 Thursday, December 20, 2007 Thursday, December 20, 2007 DVD_KEY6 3-39 3-40 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 42: Memory Circuit Diagram

    LG & MALATA LG & MALATA 03.MEMORY 03.MEMORY 03.MEMORY Thursday, December 20, 2007 Thursday, December 20, 2007 Thursday, December 20, 2007 3-41 3-42 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 43: Opu & Motor Circuit Diagram

    04.OPU & MOTOR 04.OPU & MOTOR 04.OPU & MOTOR Thursday, December 20, 2007 Thursday, December 20, 2007 Thursday, December 20, 2007 3-43 3-44 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 44: Av Circuit Diagram

    05.AV 05.AV SP_R- SP_R+ SP_R+ LCD I/F Thursday, December 20, 2007 Thursday, December 20, 2007 Thursday, December 20, 2007 3-45 3-46 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 45: Charge Circuit Diagram

    LG & MALATA TP616 TP616 06.CHARGE 06.CHARGE 06.CHARGE Thursday, December 20, 2007 Thursday, December 20, 2007 Thursday, December 20, 2007 3-47 3-48 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 46: Lcd I/F Circuit Diagram

    C707 07.LCD I/F 07.LCD I/F 07.LCD I/F Thursday, December 20, 2007 Thursday, December 20, 2007 Thursday, December 20, 2007 3-49 3-50 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 47: Key Menu Circuit Diagram

    LG & MALATA 08.MENU KEY 08.MENU KEY 08.MENU KEY Thursday, October 25, 2007 Thursday, October 25, 2007 Thursday, October 25, 2007 3-51 3-52 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 48: Circuit Voltage Chart

    1.58 1.56 U605(SM9926K) 1.02 1.87 1.07 1.17 Emitter 11.94 11.88 3.26 3.26 1.03 1.38 Collector 5.06 5.07 2.43 2.36 3-53 3-54 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 49 4.99 CE204 CE602 2.00 2.00 CE417 12.13 12.08 CE205 3.34 3.33 3.34 3.33 CE604 3.33 3.33 CE418 10.40 10.40 3-55 3-56 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) 3-57 3-58 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) 3-59 3-60 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 52: Key Menu P.c.board

    2. KEY MENU P.C.BOARD (TOP VIEW) (BOTTOM VIEW) 3-61 3-62 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 53 MEMO MEMO 3-63 3-64 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

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