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S33A1-D
LG S33A1-D Service Manual
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3-5
RECEIVER BAR ONE POINT REPAIR GUIDE
NO SOUND
1-3-2. USB Function
1-3-2-1. Solution
Replace IC301 on MAIN board.
1-3-2-2. How to troubleshoot (Countermeasure)
1) Please check IC301(Pin112, 113) USB data signal.
If you cannot find IC301 USB data signal, replace IC301.
1-3-2-3. Service hint (Any picture / Remark)
< MAIN board top view >
IC301
17
19
Table of Contents
Section 1 General
3
Table of Contents
3
Esd Precautions
4
Micom Hidden Key Mode
5
Update Program
6
Service Information for Eeprom
6
Specifications
7
Section 2 Cabinet & Main Chassis
8
Exploded Views
10
Receiver Bar Section (Nb3530A)
10
Wireless Subwoofer Section (S33A1-D)
11
Packing Accessory Section
12
Section 3 Electrical
14
One Point Repair Guide
15
Electrical Troubleshooting Guide
20
Receiver Bar Troubleshooting
20
Waveforms of Major Check Point
24
Wiring Diagrams
28
Receiver Bar Wiring Diagram
28
Wireless Subwoofer Wiring Diagram
29
Block Diagrams
30
Receiver Bar Block Diagrams
31
Wireless Subwoofer Block Diagram
32
Circuit Diagrams
33
Receiver Bar Circuit Diagrams
34
Circuit Voltage Chart
39
Printed Circuit Board Diagrams
41
Receiver Bar Printed Circuit Board Diagrams
42
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LG S33A1-D Specifications
General
Brand
LG
Model
S33A1-D
Category
Speaker System
Language
English
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