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LG SPP8-W Service Manual
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3-10
Copyright © 2021 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
ONE POINT REPAIR GUIDE
NO SOUND
2-4. USB
2-4-1. Solution
Replace MAIN board.
2-4-2. How to troubleshoot (Countermeasure)
1) Please check soldering status of USB_5 V at JK201 pin1.
2) If soldering status and USB_5 V are abnormal, replace MAIN board.
2-4-3. Service hint (Any picture / Remark)
< MAIN board top view >
JK201
JK201
42
44
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
Wireless Subwoofer Connection
6
Woofer & Rear Pairing Method
7
Hidden Key Mode
8
Firmware Update Guide
9
Specifications
18
Section 2 Cabinet & Main Chassis
20
Disassembly Instructions
21
How to Disassemble the Main Unit
22
How to Disassemble the Subwoofer
26
Exploded Views
28
Main Unit (Sp8) Section
28
Wireless Subwoofer (Spp8-W) Section
30
Packing Accessory Section
32
Section 3 Electrical
34
Wiring Diagram
35
Block Diagram
36
Booting When You Turn the Unit On, no Message or "Hello" on Front Panel
37
One Point Repair Guide
37
Sound
40
Protection Error
44
Crystal
47
Waveforms of Major Check Point
47
Remote Control
48
Optical
49
Circuit Voltage Chart
50
Main P. C. Board Diagram
51
Printed Circuit Board Diagrams
51
Amp P. C. Board Diagram
52
Front Led P. C. Board Diagram
53
MIC & Touch P. C. Board Diagram
53
Section 4 Wireless Subwoofer Part
54
Wiring Diagram
55
Block Diagram
56
One Point Repair Guide
57
Power on Error
57
Wireless Connection
59
Crystal
60
Flash Memory
60
Waveforms of Major Check Point
60
Voltage
61
Amp Voltage
62
Pwm
63
Led
64
Circuit Voltage Chart
66
Printed Circuit Board Diagrams
67
Woofer Smps & Amp P. C. Board
67
Wiring Diagram
69
Block Diagram
70
One Point Repair Guide
71
Electrical Troubleshooting Guide
72
Waveforms
73
Printed Circuit Board Diagrams
74
Wireless Receiver Smps P. C. Board
74
Wireless Receiver Amp P. C. Board
75
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LG SPP8-W Specifications
General
Brand
LG
Model
SPP8-W
Category
Speaker System
Language
English
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