Acer AT4250-DTV, Service Manual

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Chapter 1 31
4. Power Supply Electrical Specification
This power supply for this product is an internal converter with a non-replaceable fuse internally. This converter is
well designed to meet CE mark requirement.
Residual hum at min.
volume 500uW max.
Max. hum at max. volume 1000 uW max.
Input voltage and
frequency range • Operating range of line voltage: AC 90V to 264V,
47Hz to 63Hz
• Power consumption: under 291W
Line fuse The AC input is fused and becomes 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 is 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 is 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 120V) within five 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 is easily visible from the front of
the display.
Inverter The inverter which is used to light up backlight of
LCD panel is designed to meet the requirement of
panel’s specification.