Acer AL1923 Service Manual page 11

Timings
The product has 26 memory modes in total. 16 modes are preset and 10 modes
are user definable.
MODE NO.
RESOLUTION
Dot clock(MHz)
f h
H-Total ( us )
H-Sync ( us )
H-B-P ( us )
H-Active ( us )
H-F-P ( us )
f v
V-Total (ms )
V-Sync ( ms )
V-B-P (ms )
V-Active ( ms )
V-F-P ( ms )
SYNC. H/V
POLARITY
SEP . SYNC
MODE NO.
RESOLUTION
Dot clock(MHz)
f h
H-Total ( us )
H-Sync ( us )
1
720 x 400 640 x 480
28.321
31.469kHz 31.469kHz
31.78(900dots) 31.778 (800 dots) 28.571(864 dots) 26.413 (832 dots)
3.813(108dots) 3.813 (96 dots)
1.907(54dots) 1.907 (48 dots)
25.42(720dots) 25.422 (640 dots) 21.164 (640 dots) 20.317(640 dots)
0.636(18dots) 0.636 (16 dots)
70Hz(70.087) 60Hz (59.940)
14.27(449 lines) 16.683 (525 lines ) 15.000 (525 lines ) 13.735(520 lines)
0.064(2 lines) 0.064 (2 lines )
1.112(35 lines) 1.049 (33 lines ) 1.114 (39 lines )
12.71(400 lines) 15.253 (480 lines ) 13.714 (480 lines ) 12.678(480 lines)
0.384(12 lines) 0.317 ( 10 lines)
-/+
Y
5
640 x 480 800 x 600
31.5
37.500kHz 35.16kHz
26.667(840 dots) 28.44(1024 dots)
2.032 (64 dots) 2.00(72 dots)
- 11 -
2 3
640x480
25.175 30.24
35.0kHz
2.116 (64 dots)
3.175 (96 dots)
2.116 (64 dots)
66.7 HZ (66.667)
0.086 (3 lines )
0.086 (3 lines )
- / - +/+
Or -/-
Y Y
6 7
800 x 600
36 40
37.879kHz
26.40 (1056
dots)
3.200 (128 dots)
4
640 x 480
31.5
37.861kHz
1.270(40 dots)
4.064(128 dots)
0.762(24 dots)
72.809Hz
0.079(3 lines)
0.739(28 lines)
0.237(9 lines)
-/-
Y
8
800 x 600
49.5
46.875kHz
21.333 (1056dots)
1.616 (80 dots)