Samsung 215TW Service Manual - Page 61

Preset Timing Modes - user manual

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14 Reference Infomation 14-5 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 IBM, 640 x 480 IBM, 720 x400 VESA 640 x480 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 (kHz) 31.469 31.469 37.5 37.879 46.875 48.363 60.023 63.981 79.976 81.129 65.300 Vertical Frequency (Hz) 59.940 70.087 75 60.317 75.0 60.004 75.029 60.020 75.025 76.106 60.000 Pixel Clock (MHz) 26.175 28.322 31.5 40.0 49.5 65.0 78.750 108.00 135.0 135.00 146.00 Sync Polarity (H/V) 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

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14 Reference Infomation
14-8
14-5 Preset Timing Modes
Sync Polarity
(H/V)
Pixel Clock
(MHz)
Vertical Frequency
(Hz)
Horizontal
Frequency
(kHz)
Display Mode
IBM, 640 x 480
31.469
59.940
26.175
+/-
IBM, 720 x400
31.469
70.087
28.322
-/+
VESA 640 x480
37.5
75
31.5
-/-
VESA 800 x 600
37.879
60.317
40.0
+/+
VESA 800 x 600
46.875
75.0
49.5
+/+
VESA 1024 x 768
48.363
60.004
65.0
-/-
VESA 1024 x 768
60.023
75.029
78.750
+/+
VESA 1280 x 1024
63.981
60.020
108.00
+/+
VESA 1280 x 1024
79.976
75.025
135.0
+/+
SUN 1280 x 1024
81.129
76.106
135.00
-/-
VESA 1680 x 1050
65.300
60.000
146.00
+/+
- 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
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