Preset Timing Modes - Samsung Lacie720 Service Manual

14 Reference Infomation

14-6 Preset Timing Modes

- If the signal transferred from the computer is the same as the following Preset Timing Modes, the screen
will be adjusted automatically. However, if the signal differs, the screen may go blank while the power LED
is on. Refer to the video card manual and adjust the screen as follows.
Table 14-3 Preset Timing
Display Mode
IBM, 640 x 480
IBM, 720 x 400
VESA, 640 x 480
VESA, 800 x 600
VESA, 800 x 600
VESA, 1024 x 768
VESA, 1024 x 768
VESA, 1280 x 1024
VESA, 1280 x 1024
SUN, 1280 x 1024
VESA, 1680 x 1050
- Horizontal Frequency
The time to scan one line connecting the right edge to the left edge of the screen horizontally is called
Horizontal Cycle and the inverse number of the Horizontal Cycle is called Horizontal Frequency. Unit: kHz
- Vertical Frequency
Like a fluorescent lamp, the screen has to repeat the same image many times per second to display an
image to the user. The frequency of this repetition is called Vertical Frequency or Refresh Rate. Unit: Hz
14-8
Horizontal
Vertical Frequency
Frequency
(Hz)
(kHz)
31.469 59.940
31.469 70.087
37.500 75.000
37.879 60.317
46.875 75.000
48.363 60.004
60.023 75.029
63.981 60.020
79.976 75.025
81.129 76.106
65.300 60.000
Pixel Clock
Sync Polarity
(MHz)
25.175
28.322
31.500
40.000 +/+
49.500 +/+
65.000
78.750 +/+
108.00 +/+
135.00 +/+
135.00
146.00 +/+
(H/V)
-/-
-/+
-/-
-/-
-/-