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LG Electronics 32LD320 32LD320-ZA, 32LD320N 32LD320N-ZA - Trouble shooting by input block (Component level check)

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LCD TV Repair Process Index

- Trouble shooting by input block (Component level check)

No. Symptom (L) Input Block Page Remark

1 Power Problem Power-up Boot fail 1~2

Video Problem

No OSD 3~4

3 Digital TV 5

4 Analog TV 6

5 AV (Scart / CVBS/ S-Video) 7~12

6 Component 13

7 RGB(D-SUB) 14~15

8 HDMI 16~17

Audio Problem

All Input 18

10 Digital TV 19

11 Analog TV 20

12 AV / Component / RGB, HDMI-PC/ HDMI-DTV 21~26

13 AV Audio out / No Audio (Headphone &

SPDIF) 27~30

14 USB / Remocon Problem USB no connect / Remocon 31~33

15 Intelligent Sensor Intelligent Sensor 34

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Contents

Main LCD TV SERVICE MANUAL CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. CHASSIS : LD91A MODEL : 32LD320 MODEL : 32LD320N 32LD320N-ZA CONTENTS SAFETY PRECAUTIONS General Guidance 1.5 Kohm/10W Before returning the receiver to the customer, Leakage Current Cold Check(Antenna Cold Check) SERVICING PRECAUTIONS Page SPECIFICATION 1. Application range 2. Requirement for Test 3. Test method 4. Component Video Input (Y, CB/PB, CR/PR) 5. RGB (PC) 6. HDMI Input (PC/DTV) (2) PC Mode (1) DTV Mode ADJUSTMENT INSTRUCTION 1. Application Range 2. Designation 3. Main PCB check process * Boot file Download 3.1. ADC Process 3.2 Function Check - 9 - 4. Total Assembly line process 4.1. Adjustment Preparation * Manual W/B process using adjusts Remote control. 4.2. DDC EDID Write (RGB 128Byte ) 4.3. DDC EDID Write (HDMI 256Byte) - Auto Download - Manual Download 4.5. V-COM Adjust(Only 37/42/47LH4000-ZA) 4.6. Outgoing condition Configuration 4.7. Internal pressure 5. Serial number D/L 5.1. Signal TABLE 5.2. Command Set 5.3. method & notice - 13 - EXPLODED VIEW IMPORTANT SAFETY NOTICE FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS IC103 W25X32VSSIG 2009.03.25 MODEL OPTION POWER DETECT FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS +3.3V 2009.03.25 AUDIO OUT AUDIO IN FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS IC301 H5PS5162FFR-S6C 2009.03.25 DDR2 3 11 AV (OPT:SIDE_AV) REAR USB (OPT:REAR_USB) SPDIF OPTIC JACK SIDE USB (OPT:SIDE_USB) FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS DVB-CI DETECT PCMCIA 5 11 IC502 74LVC541A(PW) SIDE HDMI (OPT:SIDE_HDMI) (OPT:REAR_HDMI_2EA) HDMI_CEC FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS IC700 TPA6110A2DGNRG4 EARPHONE AMP MCLK SDATA WCK BCK TP is necessory Monitor0_1_2 TP is necessory Copyright 2009 LG Electronics. Inc. All right reserved. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS Stand-by +3.3V FROM LIPS & POWER B/D S6 core 1.26 volt +5V 50 mA SCART2 PIN 8 Scart Audio Mute Audio Out Amp TU1200 TDFW-G235D 2009.03.25 DVB-CI DETECT TUNER 10 11 Tuner PLL : 0xC2 Small MODULE&CTL 11 11 LVDS_MNT_HD_19~22 LVDS_HD_19~22 Page Block Diagram L/R - 19/22/26/32/37/42LH2000 - 32/37/42/47LH3000 - 32/37/42/47LH4000 Mstar S6 LGE3368A (No-DVIX) (IC100) LVDS (10 bit) Block diagram 37 GIP Block Diagram Block diagram *M+S : Main B/D + T-con B/D In different 42/47 Normal Block Diagram Only for 42/47LH4000 Block diagram *M+S : Main B/D + T-con B/D Page date Revised date 1/13 No video/ Normal audio First of all, Check whether all of cables between board is inserted properly or not. (Main B/D Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable,,,) 1 Page A. Picture Problem Menu Setup Booster Color error LGD Module Only Other Module date Revised date 4/13 Vertical/Horizontal bar, residual image, light spot Vertical / Horizontal bar, residual image, light spot, external device color error 5/13 External device screen error-Color error device and cable B. Power error B. Power error Off when on, off while viewing, power auto on/off 7/13 date Revised date * Please refer to the all cases which can be displayed on power off mode. C. Audio error Wrecked audio/discontinuation/noise is same after Check input signal compared to No audio C. Audio error 9/13 Wrecked audio/ discontinuation/noise date Revised date 9 D. General Function Problem 1. Remote control (R/C) operating error 2. Local(Mechanical) switch operating error D. Function error E. Noise <With Inverter Module> <Without Inverter Module> 12 F. Exterior defect LCD TV Repair Process Index - Trouble shooting by input block (Component level check) Making Revision 1/34 LCD TV Symptom Power-Up Boot Fail 26~42LH2000 32~47LH3000/LH4000 Making Revision LCD TV Symptom Power-Up Boot Fail 19~22LH2000 2/34 Page LCD TV Symptom No OSD LCD TV Symptom Digital TV Video Problem LCD TV Symptom Analog TV Video Problem LCD TV Symptom AV1(Scart CVBS) No Video Problem LCD TV Symptom AV1(Scart RGB) No Video LCD TV Symptom AV2 No Video Problem LCD TV Symptom AV3(CVBS) No Video Problem LCD TV Symptom AV1 No Video Out Problem LCD TV Symptom AV2 No Video Out Problem LCD TV Symptom Component No Video/ No Color Problem LCD TV Symptom RGB No Video Problem LCD TV Symptom RGB No Color Problem LCD TV LCD TV Symptom HDMI1 or 2 or 3 No Video Making Revision 18/34 LCD TV Symptom All Source no Audio Problem 26~42LH2000 32~47LH3000/LH4000 LCD TV Symptom Digital TV No Audio Problem LCD TV Symptom Analog TV No Audio Problem LCD TV Symptom AV1 No Audio Problem LCD TV Symptom AV2 No Audio Problem LCD TV Symptom AV3 No Audio Problem Page LCD TV LCD TV Symptom HDMI-DTV No Audio Problem LCD TV Symptom AV1 No Audio Out Problem LCD TV Symptom AV2 No Audio Out Problem LCD TV Symptom Headphone No Audio Problem LCD TV Symptom SPDIF No Audio Problem LCD TV Symptom USB No Connect Problem Page LCD TV Symptom Remote Control Problem LCD TV Symptom Intelligent Sensor Problem