ViewSonic VA1930wm-1 Service Manual page 24

1152*870@75Hz
VESA
1280*960@60Hz
1280*960@75Hz
VESA
1280*1024@60Hz
VESA
1280*1024@75Hz
4. Power On/Off Sequence
4.1 Hardware Power ON
When power cord is plugged into AC socket, SMPS starts work and provides U105 with VCC5V. When
VCC5V inputs, U105 resets circuit active, sets U105 all registers to preset modes, and then monitor goes into
stand-by mode. That means hardware power on has been completed.
4.2 Software Power ON/OFF
When press power key, U105 # 90 recieves low pulse,and then U105 will do the power on/off.
If Power ON, U105 # 91(LED_Green) will send out Low potential, and then LED green on.
-
If Power OFF, U105 # 91(LED_Green) will send out High potential, and then LED Off.
-
The Panel_Vcc, Backlight_En, CLK/DATA output to panel will follow the following sequency.
T1 (ms) T2 (ms) T3 (ms) T4 (ms)
0.1~10
ViewSonic Corporation
−
75.062
60.000 +
60.000 +
75.000 +
75.000 +
63.981 +
60.020 +
79.976 +
75.025
+
0.5~10 >200
915 870
1800 1280
1000 960
1800 1280
1000 960
1688 1280
1066 1024
1688 1280
1066 1024
T5 (ms)
>100 0~50
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21
3 39
112 312
3 36
112 312
3 36
112 248
3 38
144 248
3 38
T6 (ms) T7 (ms)
0.1~25 >1000
108.000
130.000
108.000
135.000
VA1930wm-1