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LAP340
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LG LAP340 - Page 8
55 pages
Manual
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1-7
4-1) Insert the power cord at the back of the main
set.
4-2) Power on the sound plate and you can see
massage of the display jig.
If display jig does not display anything,
please check the connection of display jig
and cable and main set again.
7
9
Table of Contents
Main Page
Section 1 General
3
Default Chapter
3
Table of Contents
3
Esd Precautions
4
Software Update Method
5
1 Connection of the Jig
6
Software Download
6
2 Software Download
9
Specifications
18
Section 3 Electrical
26
One Point Repair Guide
27
Power Problem (20 Va)
27
Power on
28
Audio Output
29
Audio out in Optical Function
30
Audio Output in Bt Function
31
Electrical Troubleshooting Guide
32
Power Supply on Smps Board
32
Power Supply on Main Board
33
Power Supply on Amp Board
34
System Part
35
Audio Output in Optical Function
36
Audio Output in Bt Function
36
Waveforms of Major Check Point
38
System Part - Micom
38
System Part - Led
38
Audio Part - Optical Input
39
Audio Part - Bt Uart Input
39
System Part - Dac Interface
40
System Part - Dsp X-Tal I/O
40
Audio Part - Dsp I2S
41
Audio Part - Dac Output
41
Audio Part - Line Driver Output
42
Audio Part - Volume IC Output
42
Audio Part - Amp IC Output
43
Wiring Diagram
44
Block Diagram
45
Circuit Diagrams
46
Main - Smps Circuit Diagram
46
Main - Power Circuit Diagram
47
Main - Micom Circuit Diagram
48
Main - Audio Dsp Circuit Diagram
49
Main - Dac/ Amp Circuit Diagram
50
Led Circuit Diagram
51
Key Circuit Diagram
51
Circuit Voltage Chart
52
Printed Circuit Board Diagrams
53
Main P. C. Board
53
Led P. C. Board
55
Key P. C. Board
55
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