BenQ PB8220 - XGA DLP Projector, Service Manual

Page: 21 / 112

Appendix E Power Supply Specification
F.1 Input Power Specification
Specification Description
Input Voltage Range
The unit shall meet all the operating requirements with the range 90 ~ 264
VAC
Frequency Range
The unit shall meet all the operating requirements with an input frequency
range 50 Hz ~ 60 Hz
Power Consumption
Normal operation: 340 W (Typical)
standby mode: < 15W
Regulation Efficiency
80 % (typical) measuring at 115Vac and full load
F.2 Output Power Requirement
The power supply can provide DC output as below
：
NO. Voltage Regulation Load Current Range Ripple & Noise
1
+5 V
±
5 % 0.1A ~ 1.2 A 150 mV
2 +3.3 V
±
5 % 0.5 A ~ 1.2 A 120 mV
3 +12 V
±
10 %
0.1 A ~ 1.2 A 300 mV
F.3 Lamp Power specifications
Specification Description
Applicable Lamp 250W, AC operation
Starting pulse from
Ignitor
Pulse voltage 6~10kV max.
F.4 Others
Item
Description
Power good signal
Active high after 5 Volt reach 95% of its rating and goes to logic low at least 0.5ms
before power falls to 90% of its rating
High voltage and
high temperature
protection
To avoid user from the dangerous of HV and high temperature, when front door of
lamp case is opened whether intentionally or accidentally, the power should be
disconnected immediately. When the door is closed again, the igniter restart
sequence should be compliant to that is described previously
20