Circuit Diagrams; Smps Circuit Diagram - LG RHT497H Service Manual

CIRCUIT DIAGRAMS

1. SMPS CIRCUIT DIAGRAM

No Power
BD101, R101 is Defective
S/W Error
IC101 is Defective
No Power
F101 is Defective
FD(+)FD(-) No Power
D121 is Defective
-28VA No Power
D122 is Defective
5V No Power
D125 is Defective
13.5VA No Power
No Power
D124 is Defective
D102 is Defective
3.8VA No Power
D127 is Defective
5.3VA No Power
D128 is Defective
33VA No Power
D126 is Defective
Switching Error
IC102, IC103 are Defective
3-43
IMPORTANT SAFETY
WHEN SERVICING THIS CHASSIS, UNDER NO ON THE SCHEMATIC FOR EASY IDENTIFICATION.
CIRCUMSTANCES SHOULD THE ORIGINAL THIS CIRCUIT DIAGRAM MAY OCCASIONALLY
DESIGN BE MODIFIED OR ALTERED WITHOUT DIFFER FROM THE ACTUAL CIRCUIT USED. THIS
PERMISSION FROM THE LG CORPORATION. ALL WAY, IMPLEMENTATION OF THE LATEST SAFETY
COMPONENTS SHOULD BE REPLACED ONLY WITH AND PERFORMANCE IMPROVEMENT CHANGES
TYPES IDENTICAL TO THOSE IN THE ORIGINAL INTO THE SET IS NOT DELAYED UNTIL THE NEW
CIRCUIT. SPECIAL COMPONENTS ARE SHADED SERVICE LITERATURE IS PRINTED.
12V No Power
IC155 is Defective
5V No Power
IC156 is Defective
3-44
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.