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LG SJ8 User Manual
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SERVICE MANUAL
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS”
IN THIS MANUAL.
CONFIDENTIAL
MODEL: SJ8 (SJ8, SPJ8-W)
P/NO : AFN78212019
SEPTEMBER, 2017
MODEL:
SJ8
(SJ8, SPJ8B-W)
Copyright © 2017 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
SMART Hi-Fi AUDIO
Wireless Multi-room Sound Bar
2
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
Hidden Mode
8
Software Update Guide
9
Version Check
17
Specifications
18
Section 2 Cabinet & Main Chassis
20
Disassembly Instructions
21
How to Disassemble the Main Unit
22
How to Disassemble the Subwoofer
29
Exploded Views
32
Main Unit Section
32
Wireless Subwoofer Section
33
Packing Accessory Section
34
Section 3 Electrical
36
Wiring Diagram
37
Block Diagrams
38
System Block Diagram
38
Power Block Diagram
39
One Point Repair Guide
40
Booting When You Turn the Unit On, no Message or "Hello" on Front Panel
40
Sound
43
Protection Error
48
Waveforms of Major Check Point
50
Crystal
50
Flash
52
Tact Key
52
Remote Control
54
Optical
55
Circuit Voltage Chart
56
Ics
56
Capacitors
56
Connectors
56
Printed Circuit Board Diagrams
57
Main P. C. Board Diagram
57
Amp P. C. Board Diagram
58
Front P. C. Board Diagram
59
Key P. C. Board Diagram
59
Section 4 Wireless Subwoofer Part
60
Wiring Diagram
61
Block Diagram
62
One Point Repair Guide
63
Power on Error
63
Wireless Connection
65
Waveforms of Major Check Point
66
Crystal
66
Flash Memory
66
Voltage
67
Amp Voltage
68
Pwm
69
Led
70
Circuit Voltage Chart
72
Printed Circuit Board Diagrams
73
Woofer Smps & Amp P. C. Board
73
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Simple Manual
8 pages
Installation Guide
2 pages
4
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LG SJ8 Specifications
General
Brand
LG
Model
SJ8
Category
Speaker System
Language
English
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