Circuit Diagrams; Power(Smps) Circuit Diagram - LG DVS7905 Service Manual

CIRCUIT DIAGRAMS

1. POWER(SMPS) CIRCUIT DIAGRAM

No power.
BD101, R101 are defective.
No Power.
F101 is defective.
NOTE) Warning
NOTES) Symbol denotes AC ground.
NOTE) Parts that are shaded are critical
NOTE) With respect to risk of fire or
NOTES) Symbol denotes DC chassis ground.
NOTE) electricial shock.
2.5V, 3.3V no power.
D111 is defective.
Switching Error.
IC101 is defective.
D118
BI0A 45VT
33V no power.
D113 is defective.
Switching Error.
IC105, 102 are defective.
3-30
IMPORTANT SAFETY NOTICE
WHEN SERVICING THIS CHASSIS, UNDER NO CIR-
CUMSTANCES SHOULD THE ORIGINAL DESIGN BE
MODIFIED OR ALTERED WITHOUT PERMISSION
FROM THE LG ELECTRONICS CORPORATION. ALL
COMPONENTS SHOULD BE REPLACED ONLY WITH
TYPES IDENTICAL TO THOSE IN THE ORIGINAL CIR-
12VA no power.
D110 is defective.
5.3VA no power.
D112 is defective.
3-31
CUIT. SPECIAL COMPONENTS ARE SHADED ON THE NOTE :
SCHEMATIC 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.
B1151
COMBI SCART
V7's