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PLASMA TV
SERVICE MANUAL
CHASSIS : PU14K
MODEL : 42PT330/350/350C
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL67002603(1106-REV01)
42PT330-UB/42PT350-UD/
42PT350C-UD
North/Latin America
Europe/Africa
Asia/Oceania
Internal Use Only
http://aic.lgservice.com
http://eic.lgservice.com
http://biz.lgservice.com
Printed in Korea
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Summarization of Contents
SAFETY PRECAUTIONS
IMPORTANT SAFETY NOTICE
Identifies critical safety parts and emphasizes using specified components for safety.
General Guidance
Provides general advice for safe servicing, including isolation transformers and handling high-voltage parts.
Leakage Current Checks
Details methods for checking hot and cold leakage currents with specific equipment.
PRODUCT SPECIFICATIONS
Overview and Test Conditions
Covers application range, testing conditions, and methods for product specifications.
General Technical Specifications
Lists technical details including screen size, aspect ratio, and operating environment.
Chroma Specifications
Details color coordinate, temperature, and brightness uniformity specifications.
ADJUSTMENT INSTRUCTIONS
Overview and PCB Assembly Adjustment
Covers application range, specifications, and PCB assembly adjustment method.
Calibration Procedures
Details ADC process, EDID write confirmation, and HD EDID data.
White Balance Adjustment
Explains white balance adjustment, auto-control, and manual procedures.
Settings and Options
Covers area options and default service options.
SYSTEM SCHEMATICS
Main Processor and Memory Schematics
Circuit diagrams for the main processor (IC1) and memory components.
Power Supply and Tuner Schematics
Circuit diagrams for power supply circuits and the tuner section.
Interface and HDMI Schematics
Circuit diagrams for USB, RS232, HDMI, HDCP, and LVDS interfaces.
Audio/Video Jack and Amplifier Schematics
Circuit diagrams for audio/video input jacks and the audio amplifier.
TROUBLESHOOTING GUIDES
Power-Up and No OSD Issues
Troubleshooting steps for power-up failures and absence of OSD.
Video Signal Troubleshooting
Guides for diagnosing issues with various video input signals.
Audio Signal Troubleshooting
Troubleshooting steps for issues related to audio outputs from all sources.
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