Circuit Diagrams; Smps - Power Circuit Diagram - LG BH5140S Service Manual

CIRCUIT DIAGRAMS

1. SMPS CIRCUIT DIAGRAM
12
No Power
BD901 is Defective
11
10
9
8
7
IC901, IC902 are Defective
6
5
No Power
F901 is Defective
4
3
2
Warning
Parts that are shaded are critical with
respect to risk of fire or electrical shock.
1
A B C D
No Power
D911 is Defective
S/W Error
No AMP Power
PC901, Q901 are Defective
E F G H
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.
FLD No Power
Vkk No Power
D950 is Defective
D951 is Defective
6.3 VA No Power
D952 is Defective
13 VA No Power
D953 is Defective
3.7 VA No Power
Switching Error
D918 is Defective
PC900, IC952 are Defective
Vcc No Power
D955 is Defective
Switching Error
PC902, IC953 are Defective
I J K L M
2-57 2-58
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 with specified part number.
DIFFER FROM THE ACTUAL CIRCUIT USED. THIS 2. Voltages are DC-measured with a digital voltmeter
WAY, IMPLEMENTATION OF THE LATEST SAFETY during Play mode.
AND PERFORMANCE IMPROVEMENT CHANGES
INTO THE SET IS NOT DELAYED UNTIL THE NEW
SERVICE LITERATURE IS PRINTED.
Vcc No Power
ZD950, ZD951 are Defective
N O P Q R
SMPS
EAX64755403, Rev1.0(0)
2013. 04. 02
S T