Acer B193, Service Manual

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7
4.Input / Output Signal Specifications
4.1Video signals
Items Condition Specification
Analog RGB signal Input impedance = 75 Ohm 0.7Vp-p
Sync Input impedance
≧
1k Ohm TTL level, Separate H/V-sync(+/-)
4.2 Signal Timing
4.2.1
D-SUB Inputs
Through D-SUB connectors, this unit can support F
H
= 31.5 ~ 80 KHz, Fv=56 ~ 75Hz
and SXGA display modes as below:
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
64.0 60.0 108.000
1280 x 1024
80.0 75.0 135.000
VESA
IBM-AT Compatible
machine
PC-9800 series
640 x 350 31.5 70.0 25.175
720 x 400 31.5 70.0 28.322
US/IBM Text
832 x 624 49.7 74.6 57.283
60.2 75.0 80.000
1024 x 768
48.8 60.0 64.000
Power Macintosh series
Note: 1. Non-interlace signals only (An interlace signal cannot be display)
2. Please refer to F/W specification for more detail
3. Each frequency of Power Macintosh and Sun Ultra is a reference value
For DVD Player Input, Attached timing is supported: (Optional)
Mode Resolution (active dot)
Resolution
(total dot)
Horizontal
Frequency (KHz)
Vertical
Frequency (Hz)
Nominal Pixel
Clock (MHz)
Remark
480P@60Hz 858x525 31.5 60.000 27.027
576P@50Hz 864x625 31.250 50.000 27.000
DVD
Player
720P@60Hz 1650x750 45.000 60.000 74.250
4.2.2
Digital signals
TMDS Signal: (min) ± 200mVpp@24Bit
4.2.3
DDC signals
DDC signals: 5V@50mA TTL level
4.3Timing requirements
Scan Frequency Condition Specification
Horizontal
Sync polarity: (+) or (-)
31.5 ~ 80 KHz.
Vertical
Sync polarity: (+) or (-)
56-75Hz
Out of range
Excluding
Horizontal 31.5~80 KHz or
Vertical 56-75 Hz
Message “Input Not Supported” on screen