Hitachi CML176SXW, Service Manual

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5. POWER SUPPLY & INVERTER BOARD
5.1 Description
The Power supply and Inverter board is designed for Display control board and lighting up
the back-lights of LCD module.
5.2 Power supply ( AC to DC section)
5.2.1
5.2.2
5.2.3
input Voltage Range
The monitor shall operate within specification over the range of 90 to 264 VAC power supply.
Input Frequency Range
Input power frequency range shall be from 47.5 to 63 Hz over the specified input
voltage range.
Quick specification review
•
Input current
1.2A (max) at 90VAC input and full load ,
0.6A (max) at 264VAC input and full load.
•
Inrush current @ cold start
30A (0-peak) @ 110Vac, 50A (0-peak) @ 220Vac
(measured when switched off for at least 10 mins.)
•
Output
Tolerance Output Current
Output Volt - MIN MAX
Volt Tolerance
+5Vdc
±
5% 0A 1.0A
4.8~5.2
Vdc
(for EP777)
+5Vdc
±
5% 0.05A 1.5A 4.8~5.2
Vdc
+13Vdc +25%/-10% 0A 2.2A 11.7~16.25Vdc
•
Total output power: 48 Watt max. for CML178SXW B
40 Watt max. for CML176SXW
•
Withstanding voltage : 1.5K
V
ac or 2.2KVdc for 1 minute.
•
Leakage current : < 0.25mA/100Vac, <3.5mA/230Vac
•
Efficiency : 70% min. @ 115V/230V
ac
, maximum load.
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