Circuit Diagrams - LG DR165 Service Manual

CIRCUIT DIAGRAMS

1. POWER CIRCUIT DIAGRAM
12
No Power
BD101,R101 are Defective
11
10
9
No Power
D102 is Defective
8
7
6
S/W Error
5
IC101,IC104 are Defective
4
No Power
F101 is Defective
3
2
1
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
5.3VA No Power
D121 is Defective
33V No Power
Q161 is Defective
Switching Error
IC102,IC103 are Defective
E F G H I
3-38
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-
12V No Power
14VA No Power
IC131 is Defective
D127 is Defective
5.5VA No Power
D125 is Defective
5V No Power
3.7V No Power
IC132 is Defective
D124 is Defective
J K L M
3-39
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.
N O P Q R S T