LG 42PC1RV/RVA User Manual

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2. No Power
(1) Symptom
1) Front LED is NO light.
2) The Set doesn’t discharge little.
(2) Check following
Is plug in power cord? Plug in power cord.
Yes
No
Is the Line Filter Cable to PSU
connected?
Connect the Cable.
Yes
No
Is the Fuse(F101) on
PSU normal?
Exchange the Fuse.
Yes
No
Is the PSU and Main Board with
13P Cable connected?
Connect a 13p Cable.
Yes
No
After the cable connect is remved
to Power Board(except the EL11
connection cable), the AC voltage
marking is authorized on manual.
When ST-BY 5V is not operated,
replace PSU.

LG 42PC1RV/RVA Specifications

General

Display Technology	Plasma
Resolution	1024 x 768
Aspect Ratio	16:9
Contrast Ratio	10000:1
Brightness	1500 cd/m²
Power Consumption	300 W
Screen Size	42 inches
Component Video Inputs	2
Composite Video Inputs	2
S-Video Inputs	1
Viewing Angle	160°
Input Ports	HDMI, Component, Composite, S-Video
HDMI Ports	1

Summary

SAFETY PRECAUTIONS

General Guidance

Provides essential advice for safe servicing procedures.

Leakage Current Checks

Details hot and cold leakage current testing methods for safety.

DESCRIPTION OF CONTROLS

Back Connection Panel

Input and Output Ports

SPECIFICATIONS

ADJUSTMENT INSTRUCTIONS

Application, Specifications, and Software Download

Power PCB and Channel Memory Adjustments

EDID/DDC Download

Equipment, Setup, and Adjustment Sequence

White Balance and Option Data

Manual White Balance and Shipping Data Input

TROUBLE SHOOTING GUIDE

Power Board Voltage Flowchart

A flowchart to diagnose voltage output issues on the power board.

Troubleshooting: No Power

Initial Power Cord and Fuse Checks

Steps to check power cord connection, line filter, and fuse for no power issues.

Board and Cable Connectivity Checks

Further checks for IR board, local key, and main board connections when no power occurs.

Troubleshooting: Protect Mode

PSU, Cable, and Board Fault Diagnosis

Steps to diagnose issues when the TV enters protect mode, checking PSU, cables, and boards.

Troubleshooting: No Raster

PSU, Cable, and Board Diagnosis for No Display

Diagnostic steps for no raster issues, focusing on PSU, cables, and board integrity.

Troubleshooting: No Sound

Speaker and Audio Path Checks

Steps to troubleshoot no sound issues, checking speakers, cables, and main board audio path.

Troubleshooting: Screen Display Issues

RF and Side AV Noise Diagnosis

Procedures to address abnormal screen display, specifically noise in RF and Side AV modes.

Troubleshooting: No Picture

LVDS, Tuner, and EDID Checks

Steps to resolve no picture issues across RF, AV/Component, and RGB/HDMI modes.

PRINTED CIRCUIT BOARD LAYOUT

BLOCK DIAGRAM

Signal Flow and Component Interconnections

EXPLODED VIEW PARTS LIST

REPLACEMENT PARTS LIST

Schematic Diagrams