Timing Chart - Samsung 203B - SyncMaster - 20" LCD Monitor Service Manual

14-3 Timing Chart

- This section of the service manual describes the timing that the computer industry recognizes as standard for
computer-generated video signals.
IBM
Mode
VGA2/
70 Hz
Timing
720 x 400
fH (kHz)
31.469
A μsec
31.777
B μsec
3.813
C μsec
1.589
D μsec
26.058
E μsec
0.318
fV (Hz)
70.087
O msec
14.268
P msec
0.064
Q msec
0.858
R msec
13.155
S msec
0.191
Clock
Freq.
28.322
(MHz)
Polarity
H.Sync
Negative
V.Sync
Positive
Remark
Separate
Separate Sync
Video
C D E
Sync
B
A
A : Line time total
C : Back porch
E : Front porch
Table 14-1 Timing Chart
VGA3/
640/75 Hz 800/60 Hz
60 Hz
640x480 800x600
640 x 480
31.469 37.500 37.879
31.778 26.667 26.400
3.813 2.032
1.589 3.810
26.058 20.317 20.000
0.318 0.508
59.940 75.000 60.317
16.683 13.333 16.579
0.064 0.080
0.794 0.427
15.761 12.800 15.840
0.064 0.027 0.0261
26.175 31.500 40.000
Negative Negative Positive
Negative Negative Positive
Separate Separate Separate
Video
Q R S
Sync
P
O
B : Horizontal sync width
D : Active time
VESA
800/75 Hz 1024/60 Hz
800x600 1024x768
46.875 48.363
21.333 20.677
3.200 1.616 2.092
2.200 3.232 2.462
16.162 15.754
0.000 0.323 0.369
75.000 60.004
13.333 16.666
0.106 0.064 0.124
0.607 0.448 0.600
12.800 15.880
0.021 0.062
49.500 75.000
Positive Negative
Positive Negative
Separate Separate
O : Frame time total
Q : Back porch
S : Front porch
14 Reference Infomation
1024/75 Hz 1280/60 Hz
1024x768 1280x1024
60.023 63.981
16.660 11.852
1.219 1.037
2.235 2.296
13.003 9.259
0.203 0.000
75.029 60.020
13.328 16.005
0.050 0.047
0.466 0.594
12.795 15.630
0.017 0.016
78.750 108.000
Positive Positive
Positive Positive
Separate Separate
H/V Composite Sync
Sync-on-Green
P : Vertical sync width
R : Active time
1280/75 Hz
1280x1024
79.975
12.504
1.067
1.837
9.481
0.119
75.025
13.329
0.038
0.475
12.804
0.013
135.000
Positive
Positive
Separate
14-5