Circuit Diagrams; Power (Smps) Circuit Diagram - LG DKC880 Manual

CIRCUIT DIAGRAMS

1. POWER (SMPS) CIRCUIT DIAGRAM

No Power
D105~D108 are Defective
Switching Error
IC101 is Defective
No Power
FR101 is Defective
IMPORTANT SAFETY
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
IDENTICAL TO THOSE IN THE ORIGINAL CIRCUIT.
SPECIAL COMPONENTS ARE SHADED ON THE
Switching Error
IC102, IC103 are Defective
3-33 3-34
NOTE :
SCHEMATIC FOR EASY IDENTIFICATION. THIS 1. Shaded( ) parts are critical for safety. Replace only
CIRCUIT DIAGRAM MAY OCCASIONALLY DIFFER with specified part number.
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.
TYPES PERFORMANCE IMPROVEMENT CHANGES INTO
THE SET IS NOT DELAYED UNTIL THE NEW SERVICE
LITERATURE IS PRINTED.
12V No Power
Q123 is Defective
5V No Power
Q126 is Defective
3.3V No Power
Q121 is Defective