Circuit Diagrams - LG HT552TH Service Manual

CIRCUIT DIAGRAMS

1. SMPS(POWER) CIRCUIT DIAGRAM
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11
10
9
8
7
6
5
4
3
2
NOTES) Symbol denotes AC ground.
NOTES) Symbol denotes DC chassis ground.
NOTE) Warning
1
NOTE) Parts that are shaded are critical
NOTE) With respect to risk of fire or
NOTE) electricial shock.
A B C D E F G H I
2-8
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
J K L M N
2-9
COMPONENTS ARE SHADED ON THE SCHEMATIC NOTE :
FOR EASY IDENTIFICATION. 1. Shaded( ) parts are critical for safety. Replace only
THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIF- 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.
O P Q R S T