File name 42LG53FR Service Manual.pdf
Internal Use Only
CHASSIS : LP81A
MODEL : 42LG53FR 42LG53FR-TD
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CONTENTS ... 2
PRODUCT SAFETY ...3
ADJUSTMENT INSTRUCTION ...13
TROUBLE SHOOTING ...17
EXPLODED VIEW ... 23
SVC. SHEET ...
Copyright C 2008 LG Electronics. Inc. All right reserved. -2- LGE Internal Use Only
Only for training and service purposes
IMPORTANT SAFETY NOTICE
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the
Schematic Diagram and Replacement Parts List.
It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent
Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
General Guidance Leakage Current Hot Check (See below Figure)
Plug the AC cord directly into the AC outlet.
An isolation Transformer should always be used during the
servicing of a receiver whose chassis is not isolated from the AC Do not use a line Isolation Transformer during this check.
power line. Use a transformer of adequate power rating as this Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor
protects the technician from accidents resulting in personal injury between a known good earth ground (Water Pipe, Conduit, etc.)
from electrical shocks. and the exposed metallic parts.
Measure the AC voltage across the resistor using AC voltmeter
It will also protect the receiver and it's components from be