Circuit Diagrams; Power(Smps) Circuit Diagram - LG GoldStar DVD5185 Service Manual

CIRCUIT DIAGRAM

1. POWER(SMPS) CIRCUIT DIAGRAM

Power dead
High Speed S/W IC
NOTES) Warning NOTES : Symbol denotes AC ground.
NOTES) Parts that are shaded are critical
NOTES) With respect to risk of fire or
Symbol denotes DC chassis ground.
NOTES) electricial shock.
-27VA is abnormal
VF+ not output
Power dead
Current feedback IC
3-20
IMPORTANT SAFETY NOTICE CUIT. SPECIAL COMPONENTS ARE SHADED ON THE
SCHEMATIC FOR EASY IDENTIFICATION.
WHEN SERVICING THIS CHASSIS, UNDER NO CIR-
THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIF-
CUMSTANCES SHOULD THE ORIGINAL DESIGN BE
FER FROM THE ACTUAL CIRCUIT USED. THIS WAY,
MODIFIED OR ALTERED WITHOUT PERMISSION
IMPLEMENTATION OF THE LATEST SAFETY AND
FROM THE LG ELECTRONICS CORPORATION. ALL
PERFORMANCE IMPROVEMENT CHANGES INTO
COMPONENTS SHOULD BE REPLACED ONLY WITH
THE SET IS NOT DELAYED UNTIL THE NEW SERVICE
TYPES IDENTICAL TO THOSE IN THE ORIGINAL CIR-
LITERATURE IS PRINTED.
12V output is abnormal
3.3V output is abnormal
3.3V output is abnormal
Power Control is abnormal
3-21
NOTE :
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.
'02. 12. 20
SI3810