Acer AL2023, Service Manual

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