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Acer AT4220 Technical Information Page 55
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Chapte
r 2
49
7.
Power bo
ard to left
invert
er boa
rd cable: The
other e
nd of th
is cable l
inks t
o the le
ft inver
ter board.
Ple
ase refe
r to
the
pho
tos be
low
.
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Service Guide
1
Revision History
2
Copyright
3
Disclaimer
4
Conventions
5
System Specification
7
INVERTER
9
LCD Main Board Block Diagram
10
LCD TV Overview
11
AT4220A Rear Panel View
12
AT4220B Rear Panel View
13
AT4220 Rear Panel View
14
Remote Control
15
Teletext
18
Basic Connection
21
For AT4220A
21
For AT4220B
21
For AT4220
22
For AT4220A/AT4220B
29
OSD Navigation
30
Empowering Technology
33
Favorite Channel Mode in TV
34
Advanced Features
36
1+5 1+12
37
Locking TV Content
38
Electro/Optical
39
Preset Mode for VGA Input
40
Power Saving
40
White Balance and Uniformity
41
Max. Brightness
41
Acoustical Noise
41
Line Fuse
42
Vibration Test
43
Drop Test
43
Multi Picture
44
General Information
45
Chapter 2
45
Disassembly Procedures
46
Chapter 2 41
47
42 Chapter 2
48
Detach function key
50
Board Placement
52
Chapter 2 47
53
48 Chapter 2
54
Chapter 2 49
55
50 Chapter 2
56
Troubleshooting
57
Symptoms
58
LCD No Backlight
59
Remote Control No Function
60
Button Keys No Function
61
RF No Display
62
Chapter 3 56
63
AV1 and AV2 No Display
64
Speaker No Sound
65
VGA No Display
66
DVI No Display
67
HDMI No Display
68
HDMI No Sound
69
VGA/DVI No Sound
70
COMPONENT No Sound
71
AV1/S-Video No Sound
72
Chapter 4
73
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