Samsung 940MW - SyncMaster - 19" LCD Monitor, Service Manual

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14 Reference Infomation
14-9
Separate Sync
This section of the service manual describes the timing that the computer industry recognizes as standard for computer-
generated video signals.
C D
A
O
E
B P
Video
Sync
Sync
Video
Q R S
A : Line time total B : Horizontal sync width O : Frame time total P : Vertical sync width
C : Back porch D : Active time Q : Back porch R : Active time
E : Front porch S : Front porch
H/V Composite Sync
Sync-on-Green
75.000
14.157
1.112
1.814
10.530
0.702
75.000
13.336
0.085
0.467
12.741
0.042
136.750
Negative
Positive
Separate
55.935
17.878
1.427
2.178
13.521
0.751
59.887
16.698
0.107
0.447
16.090
0.054
106.500
Negative
Positive
Separate
79.976
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
1280/75Hz
1280x1024
1440/60Hz
1440x900
1440/75Hz
1440x900
1280/60Hz
1280x1024
63.981
11.852
1.037
2.296
9.259
0.444
60.020
60.020
0.047
0.594
15.630
0.016
108.000
Positive
Positive
Separate
31.469
31.777
3.813
1.589
26.058
0.318
70.087
14.268
0.064
0.858
13.155
0.191
28.322
Negative
Positive
Separate
fH (kHz)
A μ sec
B μ sec
C μ sec
D μ sec
E μ sec
fV (Hz)
O msec
P msec
Q msec
R msec
S msec
Clock
Freq.
(MHz)
Polarity
H.Sync
V.Sync
Remark
IBM
640/75 Hz
640 x 480
800/60 Hz
800 x 600
800/75 Hz
800 x 600
1024/60Hz
1024 x 768
1024/75Hz
1024 x 768
VGA2/
70 Hz
720 x 400
VGA3/
60 Hz
640 x 480
31.469
31.778
3.813
1.589
26.058
0.318
59.940
16.683
0.064
0.794
15.761
0.064
25.175
Negative
Negative
Separate
37.500
26.667
2.032
3.810
20.317
0.508
75.000
13.333
0.080
0.427
12.800
0.027
31.500
Negative
Negative
Separate
35.879
26.400
3.200
2.200
20.000
1.000
60.317
16.579
0.106
0.607
15.840
0.026
40.000
Positive
Positive
Separate
46.875
21.333
1.616
3.232
16.162
0.323
75.000
13.333
0.064
0.448
12.800
0.021
49.500
Positive
Positive
Separate
48.363
20.677
2.092
2.462
15.754
0.369
60.004
16.666
0.124
0.600
15.880
0.062
75.000
Negative
Negative
Separate
60.023
16.660
1.219
2.235
13.003
0.203
75.029
13.328
0.050
0.466
12.795
0.017
78.750
Positive
Positive
Separate
Mode
VESA
Timing
(Analog Only)
14-5 Timing Chart