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S55A3-D
LG S55A3-D Service Manual
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B
A
E
C
A44B
A44A
254
A42
463
A54
256
254
A47
502
261
261
262
502
263
251
253
463
502
502
502
253
CABLE5
CABLE4
SMPS
FRONT
WIRELESS
252
CABLE2
G
F
264
264
258
A43
257
A52
B/T
F
255
D
CABLE1
D
E
B
A
502
A46
CABLE3
MAIN
G
463
C
300
EXPLODED VIEWS
1. MAIN SET SECTION
NOTES)
THE EXCLAMATION POINT WITHIN AN
EQUILATERAL TRIANGLE IS INTENDED
TO ALERT THE SERVICE PERSONNEL
TO THE PRESENCE OF IMPORTANT
SAFETY INFORMATION IN SERVICE
LITERATURE.
11
13
Table of Contents
Section 1 General
3
Table of Contents
3
Esd Precautions
4
Wireless Subwoofer Connection
5
Hidden Key Mode
6
Mcs / Eq Hidden Key Guide
7
Mcs / Eq Program Update Guide
8
Specifications
9
Section 2 Cabinet & Main Chassis
10
Exploded Views
12
Main Set Section
12
Wireless Subwoofer Section
13
Packing Accessory Section
14
Section 3 Electrical
16
One Point Repair Guide
17
Power Problem (Pvdd)
17
Power on Error
18
Sound (Portable Function)
19
Wireless
20
Bluetooth
21
Sound (Optical)
22
D(DC) Protection
23
S(Shut Down) Protection
24
B(Burnt) Protection
25
Waveforms of Major Check Point
26
Crystal
26
Flash Memory
27
Tact Key
28
Usb
29
Remote Control
30
Optical
31
Portable
32
Audio Pwm
34
Audio Amp
35
Wiring Diagram
36
Block Diagrams
37
System Block Diagram
37
Power Block Diagram
38
Circuit Diagrams
39
Smps Circuit Diagram
39
Main - Dsp Circuit Diagram
40
Main - Interface Circuit Diagram
41
Main - Pwm & Amp Circuit Diagram
42
Main - Power Circuit Diagram
43
Front Circuit Diagram
44
Circuit Voltage Chart
45
Ics
45
Connectors
46
Printed Circuit Board Diagrams
47
Smps P. C. Board Diagram
47
Main P. C. Board Diagram
48
Front P. C. Board Diagram
49
Section 4 Wireless Subwoofer Part
50
One Point Repair Guide
51
Power Problem (Pvdd)
51
Power on Error
52
Wireless Connection
54
Waveforms of Major Check Point
55
Voltage
55
Amp Voltage
56
Pwm
57
Led
58
Wiring Diagram
60
Block Diagram
61
Circuit Diagrams
62
Woofer Smps Circuit Diagram
62
Woofer Amp Circuit Diagram
63
Woofer Key Circuit Diagram
64
Printed Circuit Board Diagrams
65
Woofer Smps P. C. Board
65
Woofer Amp P. C. Board
66
Woofer Key P. C. Board
66
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Owner's Manual
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LG S55A3-D Specifications
General
Brand
LG
Model
S55A3-D
Category
Speaker System
Language
English
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