Acer Service Manual
15
1.6 Burn-in (Aging) Pattern
1.6.1 Burn-in patterns are: full Red, Green, Blue, White and Blac
1.6.2 Stop burn-in pattern by providing with video signal from D-sub connector
1.6.3 Enter or exit burn-in mode by setting “burn-in” to be “on” or “off” in the factory mode
1.7 Warm Up
All test units have to be done warm up after at least 2 hours in a room with temperature of 40±5°C.
(Except particular requirement)
2. INPUT SIGNAL
2.1 Video Signal Input
2.1.1 VESA Analog
The video input consists of red, green, and blue signals. The video signals are analog levels, where
0V corresponds to black and 700mV is the maximum signal amplitude. Input impedance of video
pins is 75 ohm ±1%.
Sync signal input
The capability of sync signal inputs shall include separate sync. Input impedance: 2k2 ohms the
signals are defined as follow:
Separate sync TTL level, Positive/Negative
2.1.2 Input signal mode
PRESET TEST MODE TIMING
Resolution
H-Freq.
(kHz)
V-Freq.
(Hz)
Dot Clock
(MHz)
Mode
31.5 60.0 25.175
37.9 72.0 31.500
640 x 480
37.5 75.0 31.500
35.1 56.0 36.000
37.9 60.0 40.000
48.1 72.0 50.000
800 x 600
46.9 75.0 49.500
48.4 60.0 65.000
56.5 70.0 75.000
1024 x 768
60.0 75.0 78.750
1152 x 864 67.5 75.0 108.000
1280 x 960 60.0 60.0 108.000
64.0 60.0 108.000
1280 x 1024
80.0 75.0 135.000
65.371 59.978 121.75
1400 x 1050
82.28 74.87 156.0
VESA Standard
640 x 480 35.0 66.7 30.200
832 x 624 49.7 74.6 57.300
1152 x 870 68.7 75.0 100.000
Power Macintosh
series
2.1.3 VGA signal cable
15 pin D-sub VGA connector of signal cable.
2.1.4 Interface
Analog signal: The input signals are applied to display through D-sub cable.
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