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SPK5B-W
LG SPK5B-W Service Manual
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3-15
Copyright © 2018 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
3. TACT KEY
FIG 3-2. Press Power Key
About :
1.67 V
FIG 3-1. Press No Key
About :
3.34 V
7
7
FIG 3-3. Press FUNC Key
FIG 3-4. Press VOL(-) Key
About :
1.35 V
About :
1.09 V
7
7
FIG 3-5. Press VOL(+) Key
FIG 3-6. Press Wi-Fi Key
About :
0.77 V
About :
0.45 V
7
7
44
46
Table of Contents
Section 1 Summary
3
Table of Contents
3
Product Safety Servicing Guidelines for Audio Products
4
Servicing Precautions
5
General Servicing Precautions
5
Insulation Checking Prodedure
5
Electrostatically Sensitive (Es) Devices
5
Name of each Component
6
Wireless Subwoofer Connection
7
Rear Speakers Connection (Sold Separately)
8
Hidden Key Mode
9
Software Update Guide
10
Specifications
13
Section 2 Cabinet & Main Chassis
14
Disassembly Instructions
15
How to Disassemble the Main Unit
16
How to Disassemble the Subwoofer
23
Exploded Views
26
Main Unit Section
26
Wireless Subwoofer Section
27
Packing Accessory Section
28
Section 3 Electrical
30
Wiring Diagram
31
Block Diagram
32
One Point Repair Guide
34
Booting When You Turn the Unit On, no Message or "Hello" on Front Panel
34
Sound
37
Protection Error
41
Waveforms of Major Check Point
44
Crystal
44
Flash Memory
44
Tact Key
45
Remote Control
47
Optical
48
Circuit Voltage Chart
49
Printed Circuit Board Diagrams
51
Main P. C. Board Diagram
51
Front P. C. Board Diagram
52
Key P. C. Board Diagram
52
Section 4 Wireless Subwoofer Part
53
Wiring Diagram
54
Block Diagram
55
One Point Repair Guide
56
Power on Error
56
Wireless Connection
58
Waveforms of Major Check Point
59
Crystal
59
Flash Memory
59
Voltage
60
Amp Voltage
61
Pwm
62
Led
63
Circuit Voltage Chart
65
Printed Circuit Board Diagrams
66
Woofer Smps & Amp P. C. Board
66
Section 5 Wireless Receiver Part (Option)
67
Wiring Diagram
68
Block Diagram
69
One Point Repair Guide
70
Electrical Troubleshooting Guide
72
Waveforms
73
Printed Circuit Board Diagrams
75
Wireless Receiver Smps P. C. Board
75
Wireless Receiver Amp P. C. Board
76
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LG SPK5B-W Specifications
General
Brand
LG
Model
SPK5B-W
Category
Speaker System
Language
English
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