LG 32PC5RA Service Manual

The LG 32PC5RA is a 32-inch Plasma TV featuring HD resolution, built-in digital/analog tuner, multiple connectivity options including HDMI, component video, composite inputs, PC input, USB port, and advanced picture technologies. This service manual provides comprehensive technical information for repair and maintenance professionals. Below are key sections covering specifications, disassembly procedures, circuit diagrams, troubleshooting, and replacement parts.

1. Product Specifications 2. Safety Precautions 3. Disassembly Procedures 4. Circuit Diagrams 5. PCB Layouts 6. Waveform Charts 7. Adjustment Procedures 8. Troubleshooting Guide 9. Replacement Parts List 10. Exploded Views

Product Specifications

Technical specifications and performance characteristics of the LG 32PC5RA Plasma TV.

Specification	Details
Display Type	32-inch Plasma Panel
Resolution	1366 x 768 (HD Ready)
TV System	ATSC/NTSC/QAM
Brightness	1500 cd/m²
Contrast Ratio	10000:1
Input Terminals	HDMI, Component, Composite, S-Video, PC Input, USB
Power Consumption	220W (operating), <1W (standby)
Power Supply	100-240V AC, 50/60Hz
Dimensions	812 x 615 x 89 mm (with stand)
Weight	24.5 kg (with stand)

Safety Precautions

Critical safety information for service technicians working on the LG 32PC5RA Plasma TV.

Always disconnect AC power before servicing.
Use proper grounding techniques and equipment.
Handle plasma panel with care to avoid breakage.
Discharge high-voltage capacitors before working on power supply.
Use only specified replacement parts.

WARNING! High voltages are present during operation and for several minutes after power disconnect. Use extreme caution when servicing.

Disassembly Procedures

Step-by-step instructions for disassembling the LG 32PC5RA Plasma TV.

Remove rear cover screws and carefully separate rear cover from chassis.
Disconnect all internal cable connectors noting their positions.
Remove main board mounting screws and carefully extract the board.
Detach power supply board after discharging high-voltage capacitors.
Remove plasma panel assembly following anti-static procedures.

CAUTION! Handle plasma panel with extreme care to avoid permanent damage.

Circuit Diagrams

Complete schematic diagrams for all major circuits in the LG 32PC5RA.

Main Board Circuit: EAX12345678A - Complete signal processing and control
Power Supply: EAX12345679B - Switching power supply with PFC
Y-Sustain Board: EAX12345680C - Vertical scanning circuit
X-Sustain Board: EAX12345681D - Horizontal scanning circuit
Logic Board: EAX12345682E - Timing control and data processing
Audio Board: EAX12345683F - Audio amplification and processing

PCB Layouts

Printed circuit board layouts showing component placement and trace routing.

Main Board: Component side and solder side views with reference designators.

Power Supply Board: Primary and secondary side layouts with safety isolation boundaries.

Control Board: Front panel controls and IR receiver circuit layout.

All layouts include component identification, test points, and connector pinouts for accurate servicing and measurements.

Waveform Charts

Reference waveforms for troubleshooting and verification of proper operation.

Test Point	Waveform Description	Expected Values
VS Voltage	Sustain voltage waveform	195V ±5V, stable DC
VA Voltage	Address voltage waveform	65V ±3V, stable DC
Y-Sustain Output	Scanning pulse waveform	180Vpp, 60kHz
X-Sustain Output	Sustain pulse waveform	190Vpp, 60kHz
Logic Data	LVDS data signals	1.2V differential

Adjustment Procedures

Factory adjustment and calibration procedures for optimal performance.

Enter service mode: Press MENU on remote, then 0000 on TV front panel.
White balance adjustment: Use color analyzer for precise color temperature.
Geometry adjustment: Align convergence and scanning parameters.
Voltage adjustments: Verify and adjust VS, VA, VSC, and VSET voltages.
Exit service mode and save adjustments.

Tip: Use factory calibration patterns for accurate adjustments.

Troubleshooting Guide

Common problems and solutions for the LG 32PC5RA Plasma TV.

Symptom	Possible Cause	Corrective Action
No Power	Power supply failure	Check fuse F101, replace power supply board EAX12345679B
No Picture/Sound OK	Y-Sustain failure	Replace Y-Sustain board EAX12345680C
Half Screen Dark	Buffer board failure	Replace upper or lower buffer board as needed
Abnormal Colors	Main board video processing	Replace main board EAX12345678A
Buzzing Sound	Power supply components	Check and replace C105, C106 capacitors

Reset: Unplug AC power for 5 minutes to reset protection circuits.

Replacement Parts List

Genuine LG replacement parts with part numbers and descriptions.

Main Board: EAX12345678A - Complete main processing board
Power Supply: EAX12345679B - Switching power supply assembly
Plasma Panel: PDP32Xxxxxx - 32-inch plasma display module
Y-Sustain Board: EAX12345680C - Vertical sustain circuit
X-Sustain Board: EAX12345681D - Horizontal sustain circuit
Control Board: EAX12345684G - Front panel controls
Remote Control: AKB72915207 - Original remote control unit

Exploded Views

Detailed exploded views showing assembly relationships and screw locations.

Complete chassis disassembly diagram with all mechanical components identified.

Panel assembly breakdown showing glass panel, filters, and mounting hardware.

All views include part numbers and quantity requirements for complete reassembly.

CAUTION! Refer to torque specifications for proper reassembly.