Home
LG
Speaker System
SPH4B-W
LG SPH4B-W Service Manual
4
of 1
of 1 rating
89 pages
Give review
Manual
Specs
To Next Page
To Next Page
To Previous Page
To Previous Page
Loading...
2-15
Copyright © 2021 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
WIRELESS
390L
AMP
A81A
SMPS
CN901
A81S
A81M
391
390R
A
B
B
C
A
392
393
C
3. WIRELESS RECEIVER 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.
23
25
Table of Contents
Section 1 General
3
Table of Contents
3
Esd Precautions
4
Location of Customer Controls
5
Wireless Subwoofer Connection
6
Rear Speakers Connection
7
Hidden Key Mode
8
Firmware Update Guide
9
Specifications
12
Section 2 Cabinet & Main Chassis
14
Disassembly Instructions
15
How to Disassemble the Main Set
16
Exploded Views
20
Main Unit Section
20
Wireless Subwoofer Section
22
Wireless Receiver Section
24
Rear Speaker Section
26
Packing Accessory Section
28
Section 3 Electrical
30
Wiring Diagram
31
Block Diagrams
32
System Block Diagram
32
Power Block Diagram
33
Booting When You Turn the Unit On, no Message or "Hello" on Front Panel
34
One Point Repair Guide
34
Sound
38
Protection Error
41
Adapter Power Circuit
43
Electrical Troubleshooting Guide
43
Key Part
52
Usb Function
53
Optical Function
54
Crystal
55
Flash Memory
55
Waveforms of Major Check Point
55
Tact Key
56
Usb
57
Remote Control
58
Optical
59
Circuit Voltage Chart
62
Main P. C. Board Diagram
63
Printed Circuit Board Diagrams
63
Key P. C. Board Diagram
64
Section 4 Wireless Subwoofer Part
66
One Point Repair Guide
67
Power Problem (Pvdd)
67
Power on Error
68
Wireless Connection
70
Voltage
71
Waveforms of Major Check Point
71
Amp Voltage
72
Pwm
73
Led
74
Wiring Diagram
76
Block Diagram
77
Printed Circuit Board Diagrams
78
Woofer Smps P. C. Board
78
Woofer Amp P. C. Board
79
Woofer Key P. C. Board
79
Section 5 Wireless Receiver Part
80
Wiring Diagram
81
Block Diagram
82
One Point Repair Guide
83
Electrical Troubleshooting Guide
85
Waveforms
86
Printed Circuit Board Diagrams
88
Wireless Receiver Smps P. C. Board
88
Wireless Receiver Amp P. C. Board
89
Other manuals for LG SPH4B-W
Owner's Manual
40 pages
4
Based on 1 rating
Ask a question
Give review
Questions and Answers:
Need help?
Do you have a question about the LG SPH4B-W and is the answer not in the manual?
Ask a question
LG SPH4B-W Specifications
General
Brand
LG
Model
SPH4B-W
Category
Speaker System
Language
English
Related product manuals
LG SPH4BM-W
40 pages
LG SPH2B-P
28 pages
LG SPH7B-W
91 pages
LG SPH5B-W
40 pages
LG SPH3B-W
27 pages
LG SP2
37 pages
LG SP8A
60 pages
LG SP8YA
64 pages
LG SP9YA
64 pages
LG SPD7Y
53 pages
LG SPN8-W
64 pages
LG SP11RA
6 pages
To Next PageTo Next PageTo Previous PageTo Previous Page
Loading...
Need help?
General
