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Summary of Contents for LG DP381B
- Page 1 Internal Use Only Website http://biz.lgservice.com PORTABLE DVD SERVICE MANUAL MODELS : DP381B, DP382B, DP383B CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL. P/NO : AFN70285030 NOVEMBER, 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...
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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
- Remote Control - Battery for Remote Control (Lithium Battery) * Designs and specifications are subject to change without prior notice. 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...
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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
835 CAR-MOUNT 808 BATTERY PLUG ASS'Y(RCA CABLE) 801 OWNER'S MANUAL ADAPTER 804 PACKING SHEET REMOTE CONTROL 803 PACKING 802A GIFT BOX 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 6. SDRAM, FLASH & EEPROM CIRCUIT DIAGRAM ................3-37 CIRCUIT VOLTAGE CHART .........................3-39 PRINTED CIRCUIT BOARD DIAGRAMS ..................3-43 1. MAIN P.C.BOARD ..........................3-43 2. KEY P.C.BOARD ..........................3-47 3. USB P.C.BOARD..........................3-48 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
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Page 13: Lcd Part
Adjust the VCOM DC level by adjust the VR2.Make sure that the VCOM DC level is between +1.9V and +2.4V. +2.15 Vcom Waveform LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes... -
Page 14: Lcd Electrical Troubleshooting Guide
IC(U9) Check and Replace +5V normal? MTK1389P (Pin:184, 185, 187) RGB signal output? Check and Replace VCOM signal? IC(U8) Check and Replace Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... - Page 15 Check and Replace +15V, -10V, +5V Check RGB AMP circuit Color normal? (Q29, Q30, Q31) and Replace Replace and Reassemble Each connector? Replace LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
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Page 16: Block Diagram
BLOCK DIAGRAM Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... - Page 17 MEMO LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
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Page 18: Circuit Diagram
100pF R185 R188 R186 R187 7.5K 100K 3906 R189 PWRCTL_LCD Q3 3 R190 3904 R191 R192 DC-DC Friday, February 22, 2008 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... -
Page 19: Circuit Voltage Chart
Collector 0.01 0.01 Base Emitter Collector 3.24 3.24 Base 1.18 1.18 Emitter 0.49 0.49 Collector 3.27 3.27 Base 1.18 1.18 3-10 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes... -
Page 20: Main Part
No +1.8V No +3.3V No +5V No LCD power Is U4 Replace Replace U4 Replace U4 3.3V OK? CON1 or CON2 Copyright © 2008 LG Electronics. Inc. All right reserved. 3-11 LGE Internal Use Only Only for training and service purposes... - Page 21 Q6 OK. Q4 and Q6 Check Is speakers OK. Replace Speakers R250, R251, C112 Replace Replace IC(U3) Refer to LCD part LGE Internal Use Only 3-12 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
- Page 22 Check SW1, SW2 switch Check IC(U9) Pin130 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...
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Page 23: 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 24: Servo Circuit
Check the tracking control output properly. amp circuit on motor driver. Check cable connection Disc is play? on pick-up head. Copyright © 2008 LG Electronics. Inc. All right reserved. 3-15 LGE Internal Use Only Only for training and service purposes... - Page 25 MT1389P MT1389P & Front µ-com key functions. is normally. Check the cable connection TEST END on Front pannel. LGE Internal Use Only 3-16 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
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Page 26: Charging Circuit
Is L27 OK? Replace L27. Is IC(U14) OK? Replace IC(U14). Is Q29 OK? Replace Q29. Is U15 OK? Replace IC(U15). Copyright © 2008 LG Electronics. Inc. All right reserved. 3-17 LGE Internal Use Only Only for training and service purposes... -
Page 27: Wiring Connection Diagrams
WIRING CONNECTION DIAGRAMS 1. WIRING CONNECTION DIAGRAMS-1 (MAIN PCB <---> LCD PCB) LCD PCB MAIN PCB LGE Internal Use Only 3-18 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes... -
Page 28: Wiring Connection Diagrams-2
2. WIRING CONNECTION DIAGRAMS-2 (MAIN PCB <---> USB PCB) MAIN PCB USB PCB Copyright © 2008 LG Electronics. Inc. All right reserved. 3-19 LGE Internal Use Only Only for training and service purposes... -
Page 29: Wiring Connection Diagrams-3
3. WIRING CONNECTION DIAGRAMS-3 (MAIN PCB <---> KEY PCB) KEY PCB MAIN PCB LGE Internal Use Only 3-20 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes... -
Page 30: 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 31: 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 32: 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 33: 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 34: 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 35 MEMO LGE Internal Use Only 3-26 Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
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Page 36: Circuit Diagrams
AD_PR CE14 AD_BATT AD_PR AD_K1 AD_K2 LED-G&R 100uF/10V AD_K1 AD_K2 0.1uF R149 51K C112 0.1uF Monday, March 03, 2008 3-27 3-28 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... -
Page 37: Av Circuit Diagram
SP_R- NC/100uF/16V SP_R- SP_R+ 3.3V SP_R+ LCD I/F NC/10K BAT_9V Monday, March 03, 2008 BAT_9V 2,3,4 3.3V 3.3V 2,3,5,6 3-29 3-30 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes... -
Page 38: Connection Circuit Diagram
C126 C125 C124 C123 C121 100PF 100PF 220PF 100PF 100PF 100PF 100PF 100PF 100PF CONNECTION Monday, March 03, 2008 3-31 3-32 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... -
Page 39: Dc-Dc Circuit Diagram
S3.3V MDI1 100uF/10V/NC 100uF/10V/NC CE22 PD_DVD PG05GBUSC 47uF/6.3V 0.1uF LD_DVD LD_CD PD_CD DC-DC Monday, March 03, 2008 HITACHI HOP1200 3-33 3-34 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes... -
Page 40: Mpeg Circuit Diagram
CB37 27MHz 0.1uF C108 C109 + CE50 100uF/6.3v 33pF 33pF 100uF/6.3v Crystal 1389P MPEG Monday, March 03, 2008 CM1117SCM223 3-35 3-36 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... -
Page 41: Sdram, Flash & Eeprom Circuit Diagram
0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 24C02 47uF/10v SOP8 SDRAM & FLASH & EEPROM Friday, January 18, 2008 3-37 3-38 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes... -
Page 42: Circuit Voltage Chart
3.46 3.35 CE30 0.01 Emitter 1.26 1.25 3.35 3.35 3.31 3.31 Collector 0.02 0.02 0.92 0.93 1.29 3.31 3.31 3-39 3-40 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... - Page 43 4.91 1.79 1.78 2.95 2.65 2.09 2.06 0.01 3.35 1.38 1.55 2.16 2.05 0.01 1.22 1.59 1.66 5.02 5.02 3-41 3-42 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
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Page 44: Printed Circuit Board Diagrams
PRINTED CIRCUIT BOARD DIAGRAMS 1. MAIN P.C.BOARD (TOP VIEW) 3-43 3-44 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... - Page 45 MAIN P.C.BOARD (BOTTOM VIEW) 3-45 3-46 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
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Page 46: Key P.c.board
2. KEY P.C.BOARD 3. USB P.C.BOARD (TOP VIEW) (BOTTOM VIEW) 3-47 3-48 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... - Page 47 MEMO MEMO 3-49 3-50 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...