Dell ST2010 Service Manual page 17

Service Manual
Software power On/Off
- When press power key, U105 #119 receives low pulse, then
U105(TSUM58EDJ-LF) will be wake up and send control signals(at
U105#125pin and #73Pin) to on CCFL and switch 5.0v to panel module, at the
same time,U105 make the VGA/HDMI cable input signal source display normal
on panel if the VGA/HDMI cable input signal is active
- If power ON, U105 #123 (LED_blue) will send out low potential, and then LED
blue on.
- If power saveing, U105 #124 (LED_Amber) will send out low potential, and
then LED Amber on.
- If power ON or power saveing, when press power key, U105 #119 pin receives
low pulse, then U105 will be sleeping and turn off backlight, at the same time,
the panel will lose +5V.
The Panel_Vcc, Backlight_En, CLK/DATA output to panel will follow the following
sequency.
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