LG 50PX950 Service Manual

The LG 50PX950 is a 50-inch plasma television featuring advanced display technology, multiple connectivity options, and comprehensive service capabilities. This service manual provides detailed technical information, troubleshooting procedures, disassembly instructions, and replacement part specifications for qualified service technicians.

1. Safety Precautions 2. Product Specifications 3. Disassembly Procedures 4. Circuit Diagrams 5. PCB Layouts 6. Voltage Measurements 7. Troubleshooting Flowcharts 8. Replacement Parts List 9. Adjustment Procedures 10. Firmware Update 11. Service Mode Access

Safety Precautions

Before servicing the LG 50PX950 plasma TV, observe all safety precautions to prevent injury and equipment damage.

Warning	Precaution
High Voltage	Discharge power supply capacitors before servicing
ESD Protection	Use anti-static wrist strap when handling PCBs
Plasma Panel	Handle with care to avoid cracking glass substrate
Power Supply	Disconnect AC power before making connections
Heat Sinks	Allow cooling time before touching components
Lifting	Use two people for panel handling and installation

Product Specifications

Display Type: 50-inch Plasma Panel
Resolution: 1920 x 1080 Full HD
Power Consumption: 350W typical, 0.5W standby
Inputs: HDMI x4, Component x2, Composite x2, VGA, USB
Audio Output: 10W x 2 speakers, Optical digital out
Power Supply: 100-240V AC, 50/60Hz
Main Boards: Main board, Power board, Y-Sustain, Z-Sustain
Back Cover: EBT62195801

Disassembly Procedures

Follow these steps for safe disassembly of the LG 50PX950 plasma television.

Remove stand: Lay TV face down on soft surface, remove screws securing stand.
Remove back cover: Remove all screws from rear casing, carefully separate back cover.
Disconnect cables: Note cable positions before disconnecting from main board.
Remove main board: Unscrew mounting points, lift board straight up.
Access power supply: Remove shield, discharge capacitors before handling.

WARNING! Plasma panel is fragile and contains hazardous materials. Handle with extreme care.

Circuit Diagrams

Complete schematic diagrams for all major circuit boards including power supply, main board, and sustain boards.

PCB Layouts

Detailed printed circuit board layouts showing component placement and test points for all boards.

Voltage Measurements

Test Point	Normal Voltage	Tolerance
VS Voltage	205V DC	±5V
VA Voltage	55V DC	±3V
5V Standby	5.1V DC	±0.2V
15V Audio	15.0V DC	±0.5V
3.3V Logic	3.3V DC	±0.1V

Troubleshooting Flowcharts

Step-by-step diagnostic procedures for common issues including no power, no picture, sound problems, and input failures.

Replacement Parts List

Part Number	Description	Qty
EBT62195801	Main Board Assembly	1
EAX61759401	Power Supply Board	1
EAX61760201	Y-Sustain Board	1
EAX61760301	Z-Sustain Board	1
6871Q2H038A	Plasma Panel 50"	1
EAX61760101	Control Board	1

Adjustment Procedures

Factory adjustment procedures for picture quality, color balance, geometry, and audio settings using service remote.

Firmware Update

Instructions for updating TV firmware via USB service port using LG service software and compatible firmware files.

Service Mode Access

Access service menu by pressing MENU button on TV, then entering service code 0000 with remote control. Navigate using arrow keys.