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CIRCUIT DIAGRAMS
1. SMPS CIRCUIT DIAGRAM
A B C D E F G H I J K L M N O P Q R ST
No Power
BD101,R101 is Defective
VFD No Power
D126 is Defective
13VA No Power
D122 is Defective
S/W Error
IC101,IC104 is Defective
Switching Error
IC102,IC103 are Defective
No Power
F101 is Defective
5V NoPower
IC152 are Defective
3.3V NoPower
IC153 are Defective
12V NoPower
IC151 are Defective
No Power
D102 is Defective
3.3VA No Power
D123 is Defective
12VA No Power
D121 is Defective
5.3VA No Power
D124 is Defective
12V NoPower
IC154 are Defective
WHEN SERVICING THIS CHASSIS, UNDER NO
CIRCUMSTANCES SHOULD THE ORIGINAL DESIGN
BE MODIFIED OR ALTERED WITHOUT PERMISSION
FROM THE LG CORPORATION. ALL COMPONENTS
SHOULD BE REPLACED ONLY WITH TYPES
IDENTICAL TO THOSE IN THE ORIGINAL CIRCUIT.
SPECIAL COMPONENTS ARE SHADED ON THE
SCHEMATIC FOR EASY IDENTIFICATION. THIS
CIRCUIT DIAGRAM MAY OCCASIONALLY DIFFER
FROM THE ACTUAL CIRCUIT USED. THIS WAY,
IMPLEMENTATION OF THE LATEST SAFETY AND
PERFORMANCE IMPROVEMENT CHANGES INTO
THE SET IS NOT DELAYED UNTIL THE NEW SERVICE
LITERATURE IS PRINTED.
1. Shaded( ) parts are critical for safety. Replace only
with specified part number.
2. Voltages are DC-measured with a digital voltmeter
during Play mode.
IMPORTANT SAFETY NOTE :
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