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SPH5B-W
LG SPH5B-W Service Manual
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3-2
ONE POINT REPAIR GUIDE
1. NO POWER PROBLEM
No power problem occurs when you power on the unit.
1-1. Solution
Replace F601, F602.
1-2. How to troubleshoot (Countermeasure)
1) Change adaptor, replace F601, F602.
1-3. Service hint (Any picture / Remark)
< MAIN board top view >
F601, F602
F601, F602
F601, F602
F601, F602
22
24
Table of Contents
Section 1 General
3
Table of Contents
3
Esd Precautions
4
Wireless Subwoofer Connection
5
Hidden Key Mode
6
Mcs / Eq Program Update Guide
7
Specifications
8
Section 2 Cabinet & Main Chassis
10
Disassembly Instructions
11
How to Disassemble the Main Set
12
How to Disassemble the Woofer
17
Exploded Views
18
Main Set Section
18
Wireless Subwoofer Section
19
Packing Accessory Section
20
Section 3 Electrical
22
One Point Repair Guide
23
Power Problem (Pvdd)
23
Power on Error
25
Sound (Portable Function)
26
Wireless
27
Bluetooth
28
Sound (Usb)
29
Sound (Optical)
30
Hdmi Problem
31
D(DC) Protection
32
S(Shut Down) Protection
33
B(Burnt) Protection
34
Waveforms of Major Check Point
35
Crystal
35
Flash Memory
36
Tact Key
37
Usb
38
Remote Control
39
Optical
40
Portable
41
Audio Pwm
43
Wiring Diagram
44
Block Diagram
45
Circuit Diagrams
46
Main - Dsp Circuit Diagram
46
Main - Pwm & Amp Circuit Diagram
47
Main - Power Circuit Diagram
48
Main - Hdmi & Jack Circuit Diagram
49
Front Circuit Diagram
50
Key Circuit Diagram
51
Circuit Voltage Chart
52
Printed Circuit Board Diagrams
53
Main P. C. Board Diagram
53
Front P. C. Board Diagram
54
Key P. C. Board Diagram
54
Section 4 Wireless Subwoofer Part
56
One Point Repair Guide
57
Power on Error
57
Wireless Connection
59
Waveforms of Major Check Point
60
Crystal
60
Flash Memory
60
Voltage
61
Amp Voltage
62
Pwm
63
Led
64
Wiring Diagram
66
Block Diagram
67
Circuit Diagrams
68
Woofer Smps & Amp - Smps Circuit Diagram
68
Woofer Smps & Amp - Amp Circuit Diagram
69
Circuit Voltage Chart
70
Printed Circuit Board Diagrams
71
Woofer Smps & Amp P. C. Board
71
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Owner's Manual
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LG SPH5B-W Specifications
General
Brand
LG
Model
SPH5B-W
Category
Speaker System
Language
English
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