Circuit Diagrams; Smps 1 Circuit Diagram - LG HDR676X Service Manual

CIRCUIT DIAGRAMS

1. SMPS 1 CIRCUIT DIAGRAM

No Power
BD101,TH101 is 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.
A B C D
- 28VA No Power
D122 is Defective
5.5VA No Power
D125 is Defective
Switching Error
IC101 is Defective
3.8VA No Power
D127 is Defective
No Power
D102 is Defective
33VA No Power
D126 is Defective
Switching Error
IC102,IC103 are Defective
E F G H
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-
No Digitron Displayed
D121,FR121,ZD121 are Defective
14VA No Power
D124 is Defective
5.3VA No Power
D128 is Defective
12V No Power
IC155 is Defective
5V No Power
IC156 is Defective
I J K L
3-43 3-44
CUIT. SPECIAL COMPONENTS ARE SHADED ON THE
SCHEMATIC FOR EASY IDENTIFICATION.
THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIF-
FER 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.
M N O P Q
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.
R S T