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Acer AT2231 Service Manual Page 29
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29
No sound
Check the source
Reset sour
ce
NG
OK
Check input signal
TV SIF
Check TV
system
Reset TV
system
NG
Check TU
101
NG
Change TU101
Check U401
OK
OK
Change U401
NG
Check U601
OK
NG
Change U601
Check spea
ker
NG
Change speaker
Check if mute
OK
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60
Acer AT2230 & AT2231
1
Service Guide
1
Preface
4
Notice:
4
Warning:
4
Precautions
5
General Specifications
7
Precautions And Notices
8
D-SUB PIN Distribution
9
Analog RGB Signal Timing
10
Panel Features
11
Test Conditions
12
Optical Specifications
12
Chapter 2
13
Chapter 3
14
Teletext
15
Using the OSD Menus
16
Chapter 4
23
Disassemble the back cover
24
Remove the Shielding-EMI
24
Disassemble the speaker
25
Remove the main frame
26
Disassemble the IR board
26
Chapter 5
27
Abnormal display
28
No sound
29
No Power (No LED indicator)
30
W / LED, No Backlight
31
Key Board
32
2. Run the program ISP_Tool
33
“Connect” again
34
PC mode display adjustment
39
Pattern-1
39
Chapter 8
40
Part List
41
EDID Data
43
Chapter 9
44
IR board
47
Main Board
48
TV CVBS Output
49
Key Component
50
To scaler
51
8 bit LVDS
52
R/B SWAP
53
MST99980CLD-LF
53
2M X 16bit X 4BK
54
System Standby Power
56
ISP PORT
57
( Front )
60
PCB key location
60
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