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LG 42PJ250 Service Manual

LG 42PJ250
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PLASMA TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : PU01A
MODEL : 42PJ250 42PJ250-UA
42PJ250 42PJ250-UB
North/Latin America http://aic.lgservice.com
Europe/Africa http://eic.lgservice.com
Asia/Oceania http://biz.lgservice.com
Internal Use Only
P/NO : MFL62881509 (1004-REV00) Printed in Korea

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LG 42PJ250 Specifications

General IconGeneral
Depth55.3 mm
Height617.8 mm
Weight20100 g
Pixel pitch- mm
Product colorBlack
RMS rated power10 W
Display diagonal42 \
Depth (with stand)260 mm
Display brightness1500 cd/m²
Display resolution1024 x 768 pixels
Display technologyPlasma
Power requirements100 - 240V, 50/60Hz
Width (with stand)988 mm
Height (with stand)688.5 mm
High frequency rate600 Hz
Weight (with stand)21600 g
USB 2.0 ports quantity1
Contrast ratio (dynamic)3000000:1
Annual energy consumption189.65 kWh
Power consumption (standby)0.1 W

Summary

SAFETY PRECAUTIONS

General Guidance

General advice for safe servicing procedures and handling.

Leakage Current Hot Check

Procedure to check AC leakage current under hot operating conditions.

Leakage Current Cold Check

Procedure to check AC leakage current under cold operating conditions.

SPECIFICATIONS

Application Range

Specifies the models and chassis this manual applies to.

Specification Details

Lists general operating and environmental specifications.

Test Method

Outlines performance and safety test standards used.

CHROMA SPECIFICATIONS

Color Coordinate

Defines chromaticity coordinates for white, red, green, and blue.

Color Coordinate Uniformity

Measures color consistency across the screen.

Color Temperature

Specifies chromaticity for Cool, Medium, and Warm settings.

Brightness Uniformity

Measures brightness consistency across the screen.

GENERAL SPECIFICATIONS

Receiving System & Channels

Details supported broadcast systems and channel ranges.

Input Voltage & Screen Size

Lists power requirements and available screen sizes.

Aspect Ratio & Tuning System

Defines display aspect ratio and tuning method.

PDP Module & Environment

Information on PDP module types and operating/storage conditions.

INPUT SIGNAL SPECIFICATIONS

Component Input

Lists resolutions and frequencies for component video input.

RGB Input (PC)

Lists resolutions and frequencies for RGB PC input.

HDMI INPUT SPECIFICATIONS

HDMI PC and DTV Input Details

Lists resolutions and frequencies for HDMI PC/DTV input.

ADJUSTMENT INSTRUCTIONS

Application Range & Specification

Specifies applicable models and general adjustment conditions.

PCB Assembly Adjustment Method

Details the process for adjusting the PCB after assembly.

ADC Process

Procedures for Analog-to-Digital Converter (ADC) calibration.

DDC EDID Write Confirmation

Verifies the correct writing of DDC EDID data.

Total Assembly Line Process

Guidelines for assembly line processes and power PCB adjustment.

DDC EDID Write Procedures

Steps for writing DDC EDID data via DFT or Remocon.

White Balance Adjustment

Test equipment and standards for white balance calibration.

Connecting Picture of Measuring Instrument

How to connect measurement tools for white balance.

Manual White Balance Procedure

Step-by-step guide for manual white balance adjustment.

HDCP Setting

Notes on HDCP key saving in external EEPROM.

RS-232C Communication

Checks RS-232C communication after Baud Rate adjustment.

Tool Option Settings

Procedures for setting tool options via DFT or manual.

Area Option Settings

Procedures for setting area options via DFT or manual.

TROUBLESHOOTING GUIDE

Power-Up Boot Fail Troubleshooting

Flowchart for diagnosing and resolving power-up boot failures.

No OSD Troubleshooting

Diagnostic steps for issues where the On-Screen Display is not visible.

Module Control Troubleshooting

Steps to troubleshoot issues related to module control signals.

Digital TV Video Troubleshooting

Diagnostic steps for video problems with digital TV signals.

Analog TV Video Troubleshooting

Diagnostic steps for video problems with analog TV signals.

Component Video Troubleshooting

Diagnostic steps for video issues with component input signals.

RGB Video Troubleshooting

Diagnostic steps for video issues with RGB input signals.

AV Video Troubleshooting

Diagnostic steps for video issues with AV input signals.

HDMI Video Troubleshooting

Diagnostic steps for video issues with HDMI input signals.

All Source Audio Troubleshooting

Steps to diagnose audio problems across all input sources.

Digital TV Audio Troubleshooting

Diagnostic steps for audio problems with digital TV signals.

Analog TV Audio Troubleshooting

Diagnostic steps for audio problems with analog TV signals.

Component / RGB / AV Audio Troubleshooting

Audio troubleshooting for Component, RGB, and AV inputs.

HDMI Audio Troubleshooting

Diagnostic steps for audio problems with HDMI input signals.

OPTIC Audio Out Troubleshooting

Steps to diagnose issues with the optical audio output.

USB Troubleshooting

Diagnostic steps for problems related to USB connectivity.

BLOCK DIAGRAM

System Block Diagram

Visual representation of the TV's main functional blocks and connections.

EXPLODED VIEW

Component Exploded View

Diagram showing the physical assembly of the TV unit's components.

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