LG S55A1-D Service Manual

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B C D E F G H I J K L M N O P Q R ST
SMPS
EAX66205001 Rev1.4(13)
2014.11.26
Warning
Parts that are shaded are critical with
respect to risk of fire or electrical shock.
No Power
BD900 is Defective
No Power
F900 is Defective
No Power
Q901 is Defective
No Power
D900 is Defective
No Power
D991 is Defective
Switching Error
IC901 is Defective
Switching Error
PC900 is Defective
Switching Error
IC950 is Defective
CIRCUIT DIAGRAMS
1. SMPS CIRCUIT DIAGRAM
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
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.
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.
IMPORTANT SAFETY NOTE :

LG S55A1-D Specifications

General

Brand	LG
Model	S55A1-D
Category	Speaker System
Language	English