Acer AL2023 Service Manual page 11

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Timings
The product has 34 memory modes in total. 26 modes are preset and 8 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 )
14.27(449 lines)
V-Sync ( ms )
V-B-P (ms )
V-Active ( ms )
12.71(400 lines)
V-F-P ( ms )
SYNC. H/V
POLARITY
SEP . SYNC
1
720 x 400
28.321
31.469kHz
31.78(900dots)
3.813(108dots)
1.907(54dots)
25.42(720dots)
0.636(18dots)
70Hz(70.087)
0.064(2 lines)
1.112(35 lines)
0.384(12 lines)
-/+
Y
2
640 x 480
25.175
31.469kHz
31.778 (800 dots)
3.813 (96 dots)
1.907 (48 dots)
25.422 (640 dots)
0.636 (16 dots)
60Hz (59.940)
16.683 (525 lines )
0.064 (2 lines )
1.049 (33 lines )
15.253 (480 lines )
0.317 ( 10 lines)
- / -
Y
- 11 -
3
640x480
30.24
35.0kHz
28.571(864 dots)
2.116 (64 dots)
3.175 (96 dots)
21.164 (640 dots)
2.116 (64 dots)
66.7 HZ (66.667)
15.000 (525 lines )
0.086 (3 lines )
1.114 (39 lines )
13.714 (480 lines )
0.086 (3 lines )
+/+
Or -/-
Y
4
640 x 480
31.5
37.861kHz
26.413 (832 dots)
1.270(40 dots)
4.064(128 dots)
20.317(640 dots)
0.762(24 dots)
72.809Hz
13.735(520 lines)
0.079(3 lines)
0.739(28 lines)
12.678(480 lines)
0.237(9 lines)
-/-
Y

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