Samsung SyncMaster CSH7839L Service Manual page 10

3 Product Specifications
Mode
IBM
VGA2/70Hz VGA3/60Hz
720 x 400 640 x 480
Timing
fH (kHz) 31.469 31.469
A µsec 31.778 31.778
B µsec 3.813 3.813
C µsec 1.907 1.907
D µsec 25.422 25.422
E µsec 0.636 0.636
fV (Hz)
70.087 59.940
O msec 14.268 16.683
P msec 0.064 0.064
Q msec 1.080 1.048
R msec 12.711 15.253
S msec 0.413 0.318
Clock
Freq. 28.322 25.175
(MHz)
Polarity
H.Sync Negative Negative
V.Sync Positive Negative
Remark
Separate Separate
Separate Sync
Horizontal
Video
C D E
Sync Sync
B
A
A : Line time total
C : Back porch
E : Front porch
3-4
Table 3-2. Timing Chart (CSH9839L)
640/85 Hz 800/85 Hz 1024/85 Hz
640 x 480 800 x 600 1024 x 768
43.269 53.674 68.677
23.111 18.631 14.561
1.556 1.138
3.810 2.702
5.222 14.222 10.836
17.778 0.569
84.997
85.008 85.061
13.333 11.756 11.765
0.080 0.056
0.427 0.503
12.800 11.179 11.183
0.027 0.019
36.000 56.250 94.500
Negative Positive Positive
Negative Positive Positive
Separate
Separate Separate
Vertical
Video
Q R S
Sync Sync
P P
O O
B : Horizontal sync width
D : Active time
VESA
1024/100 Hz 1280/75 Hz
1024 x 768 1280 x 1024
81.400 79.976
12.285 12.504
1.016 0.988 1.067
2.201 1.624 1.837
9.037 9.481
0.508 0.635 0.119
100.000 75.025
10.000 13.329
0.044 0.037 0.038
0.524 0.516 0.475
9.435 12.804
0.015 0.012 0.013
113.309 135.000
Negative Positive
Positive Positive
Separate Separate
H/V Composite Sync
A
Horizontal
B
Vertical
Green
Horizontal
P
B
O : Frame time total
Q : Back porch
S : Front porch
1280/85 Hz 1600/75 Hz
1280 x 1024 1600 x 1200
91.146
93.750
10.971 10.667
1.016 0.948
1.422
1.501
8.127 7.901
0.406 0.316
85.024
75.000
11.761 13.333
0.033 0.032
0.483 0.491
11.235 12.800
0.011 0.011
157.500 202.500
Positive Positive
Positive Positive
Separate
Separate
VIDEO
Q
S
R
Vertical
P
O
Sync-on-Green
R
Q S
O
P : Vertical sync width
R : Active time
CSH7839L/CSH9839L
MAC.
1152/75 Hz
1152 x 870
68.681
14.560
1.280
1.440
11.520
0.320
75.062
13.322
0.044
0.568
12.667
0.044
100.000
Negative
Negative
SOG