Acer AT4250B series, Service Manual

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Line Fuse
The AC input shall be fused and become electrically open as a result of an unsafe current condition. This
fuse is inside the power supply converter and is not user replaceable, and must be returned for
replacement.
This fuse shall be well selected to handle inrush current for all combinations of line voltage and frequency.
Hot plug and power on/off sequence
Once hot plug occurs, at the very first time, the initial current should be limited at 2.3 amps or lower when
power off. Current will stay below 100 m amps while power on, then ramp up to full power ( about 2.3 amps
at AC 120 volts ) within 5 seconds when power-up signal is triggered. For the shut down sequence, the
current will stay at full power for about 150 m seconds or less, then ramp down to 100 m amps within 1
second.
Power on LED Location and Type
Power on indicator shall be easily visible from the front of the display.
Inverter
The inverter which is used to light up back-light of LCD panel shall be well designed to meet requirement of
panel’s specification.
Overall Dimensions
Height: 769.44 mm
Width: 1070.96 mm
Depth: 310.73 mm
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