Circuit Diagrams; Smps - Power Circuit Diagram - LG BD550 Service Manual

CIRCUIT DIAGRAMS

1. SMPS - POWER CIRCUIT DIAGRAM

12
11
10
No Power
D101,R101 are Defective
9
S/W Error
IC101 is Defective
8
7
6
5
4
No Power
F101 is Defective
3
2
1
A B C D
No Power
D104 is Defective
CAUTION:
Switching Error
Danger if fuse is incorrectly replaced.
Replace only with the type identical to fuse rating
IC102,IC103 are Defective
and(or) model name described in main label.
E F G H I
3-93
IMPORTANT SAFETY
WHEN SERVICING THIS CHASSIS, UNDER NO
CIRCUMSTANCES SHOULD THE ORIGINAL DESIGN
BE MODIFIED OR ALTERED WITHOUT PERMISSION
FROM THE LG CORPORATION. ALL COMPONENTS
SHOULD BE REPLACED ONLY WITH
IDENTICAL TO THOSE IN THE ORIGINAL CIRCUIT.
SPECIAL COMPONENTS ARE SHADED ON THE
13VA No Power
D124 is Defective
5.3VA No Power
D126,D127 are Defective
J K L M
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NOTE :
SCHEMATIC FOR EASY IDENTIFICATION. THIS 1. Shaded( ) parts are critical for safety. Replace only
CIRCUIT DIAGRAM MAY OCCASIONALLY DIFFER with specified part number.
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.
TYPES PERFORMANCE IMPROVEMENT CHANGES INTO
THE SET IS NOT DELAYED UNTIL THE NEW SERVICE
LITERATURE IS PRINTED.
Warning
Parts that are shaded are critical with
respect to risk of fire or electrical shock.
N O P Q R S T