Power Supply & Inverter Board; Description; Power Supply ( Ac To Dc Section) - Hitachi CML176SXW Service Manual

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 input Voltage Range
The monitor shall operate within specification over the range of 90 to 264 VAC power supply.
5.2.2 Input Frequency Range
Input power frequency range shall be from 47.5 to 63 Hz over the specified input
voltage range.
5.2.3 Quick specification review
•
Input current
•
Inrush current @ cold start
•
Output
Output Volt
•
Total output power:
•
Withstanding voltage :
•
Leakage current :
•
Efficiency :
1.2A (max) at 90VAC input and full load ,
0.6A (max) at 264VAC input and full load.
30A (0-peak) @ 110Vac, 50A (0-peak) @ 220Vac
(measured when switched off for at least 10 mins.)
Tolerance
±5%
+5Vdc
±5%
+5Vdc
+13Vdc +25%/-10%
Output Current
- MIN
0A
0.05A
0A
48 Watt max. for CML178SXW B
40 Watt max. for CML176SXW
1.5KVac or 2.2KVdc for 1 minute.
< 0.25mA/100Vac, <3.5mA/230Vac
70% min. @ 115V/230Vac, maximum load.
26
Volt Tolerance
MAX
4.8~5.2Vdc
1.0A
(for EP777)
1.5A 4.8~5.2Vdc
2.2A 11.7~16.25Vdc