Preset Timing Modes - Samsung LS15HAA Service Manual

14-4 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 1. Preset Timing
Display Mode
MAC, 640 x 480
MAC, 832 x 624
MAC,1152 x870
IBM, 640 x 350
IBM, 640 x 480
IBM, 720 x 400
VESA, 640 x 480
VESA, 640 x 480
VESA, 800 x 600
VESA, 800 x 600
VESA, 800 x 600
VESA, 800 x 600
VESA, 1024 x 768
VESA, 1024 x 768
VESA, 1024 x 768
VESA, 1152 x 864
VESA 1280 x 960
VESA, 1280 x 1024
VESA, 1280 x 1024
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
Horizontal
Vertical Frequency
Frequency
(Hz)
(kHz)
35.000 66.667
49.726 74.551
68.681 75.062
31.469 70.086
31.469 59.940
31.469 70.087
37.500 75.000
37.861 72.809
35.156 56.250
37.879 60.317
46.875 75.000
48.077 72.188
48.363 60.004
56.476 70.069
60.023 75.029
67.500 75.000
60.000 60.000
63.981 60.020
79.976 75.025
14 Reference Infomation
Pixel Clock
Sync Polarity
(MHz)
30.240
57.284
100.000
25.175
25.175
28.322
31.500
31.500
36.000 +,-/+,-
40.000 +/+
49.500 +/+
50.000 +/+
65.000
75.000
78.750 +/+
108.00 +/+
108.00 +/+
108.00 +/+
135.00 +/+
(H/V)
-/-
-/-
-/-
+/-
-/-
-/+
-/-
-/-
-/-
-/-
14-5