Acer X221 Service Manual page 11

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 )
V-Sync ( ms )
V-B-P (ms )
V-Active ( ms )
V-F-P ( ms )
SYNC. H/V
POLARITY
SEP . SYNC
1
720 x 400
28.321
31.469kHz
31.78(900dots) 31.778 (800 dots)
3.813(108dots)
1.907(54dots)
25.42(720dots) 25.422 (640 dots)
0.636(18dots)
70Hz(70.087)
14.27(449 lines) 16.683 (525 lines )
0.064(2 lines) 0.064 (2 lines )
1.112(35 lines) 1.049 (33 lines )
12.71(400 lines) 15.253 (480 lines )
0.384(12 lines) 0.317 ( 10 lines)
-/+
Y
2
640 x 480
25.175
31.469kHz
28.571(864 dots)
3.813 (96 dots) 2.116 (64 dots)
1.907 (48 dots) 3.175 (96 dots)
21.164 (640 dots)
0.636 (16 dots) 2.116 (64 dots)
60Hz (59.940) 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 )
- / -
Y
- 11 -
3
640x480 640 x 480
30.24
35.0kHz 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)
+/+
Or -/-
Y
4
31.5
-/-
Y