Acer AL1717 Service-Handbuch - Seite 15

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Acer AL1717 Service-Handbuch
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1.6 Burn-in (Aging) Pattern

1.6.1 Burn-in patterns are: full Red, Green, Blue, White and Black
1.6.2 Stop burn-in pattern by providing with video signal from D-sub or DVI-D 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
2.1.2 Input signal mode
PRESET TEST MODE TIMING
Resolution
640 x 480
800 x 600
1024 x 768
1280 x 1024
640 x 350
720 x 400
832 x 624
1024 x 768
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.
Length: 1.8 m +/- 50 mm (fixed)
Connector type: D-sub male.
With DDC_2B pin assignments.
TTL level, Positive/Negative
H-Freq. (kHz) V-Freq. (Hz) Dot Clock (MHz)
31.5
60.0
37.9
72.0
37.5
75.0
35.1
56.0
37.9
60.0
48.1
72.0
46.9
75.0
48.4
60.0
56.5
70.0
60.0
75.0
64.0
60.0
80.0
75.0
31.5
70.0
31.5
70.0
49.7
74.6
60.2
75.0
48.8
60.0
25.175
31.500
31.500
36.000
40.000
50.000
49.500
65.000
75.000
78.750
108.000
135.000
25.175
28.322
57.283
80.000
64.000
14
Service Manual
Mode
VESA
IBM-AT
Compatible
machine
PC-9800 series
US/IBM Text
Power Macintosh
series