Circuit Diagrams - LG HT303PD Service Manual

CIRCUIT DIAGRAMS

1. SMPS(POWER) CIRCUIT DIAGRAM
12
11
10
9
8
7
6
5
4
3
2
1
NOTE)
NOTE)
NOTES) Symbol denotes DC chassis ground.
NOTE)
NOTE)
A B C D
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Warning
Parts that are shaded are critical
With respect to risk of fire or
electricial shock.
E F G H
IMPORTANT SAFETY NOTICE
WHEN SERVICING THIS CHASSIS, UNDER NO CIR-
CUMSTANCES SHOULD THE ORIGINAL DESIGN BE
MODIFIED OR ALTERED WITHOUT PERMISSION
FROM THE LG CORPORATION. ALL COMPONENTS
SHOULD BE REPLACED ONLY WITH TYPES IDENTI-
CAL TO THOSE IN THE ORIGINAL CIRCUIT. SPECIAL
I J K L M
2-49 2-50
COMPONENTS ARE SHADED ON THE SCHEMATIC NOTE :
FOR EASY IDENTIFICATION. 1. Shaded( ) parts are critical for safety.
THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIF- Replace only with specified part number.
FER FROM THE ACTUAL CIRCUIT USED. THIS WAY, 2. Voltages are DC-measured with a digital voltmeter
IMPLEMENTATION OF THE LATEST SAFETY AND
during Play mode.
PERFORMANCE IMPROVEMENT CHANGES INTO
THE SET IS NOT DELAYED UNTIL THE NEW SERVICE
LITERATURE IS PRINTED.
N O P Q R
SMPS-WIDE
HT303/HT353
EBY39308001 REV 7.2
2008.8.22
S T
LGE Internal Use Only