LG BH9530TW, Service Manual

Page: 142 / 147

CIRCUIT DIAGRAMS
1. SMPS CIRCUIT DIAGRAM
5-17 5-18
A
1
2
3
4
5
6
7
8
9
10
11
12
B C D E F G H I J K L M N O P Q R S T
No Power
BD901 is Defective
No Power
D901 is Defective
No Power
Q901 is Defective
No Power
D951 is Defective
S/W Error
IC901 is Defective
S/W Error
PC901 is Defective
S/W Error
IC951 is Defective
No Power
F901 is Defective
W3-4 SMPS
EAX64877701 Rev1.7(12)
2013.01.07
Warning
Parts that are shaded are critical with
respect to risk of fire or electrical shock.
IMPORTANT SAFETY NOTICE
WHEN SERVICING THIS CHASSIS, UNDER NO
CIRCUMSTANCES SHOULD THE ORIGINAL DESIGN BE
MODIFIED OR ALTERED WITH OUT PERMISSION FROM
THE LG CORPORATION. ALL COMPONENTS SHOULD BE
REPLACED ONLY WITH TYPES IDENTICAL TO THOSE
IN THE ORIGINAL CIRCUIT. SPECIAL COMPONENTS ARE
SHADED ON THE SCHEMATIC FOR EASY IDENTIFICATION.
THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIFFER 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. 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.