1. Operation
12
1.5.2 Power Supply Unit
1.5.2.1 Names and functions of each part of the Power Supply Unit
1) POWER SWITCH 3) POWER LED 8) BATTERY VOLTAGE TEST TERMINAL
2) FUSE 4) BATTERY ABN. LED 5) BATTERY OP. LED 6) FAN ABN. LED
Figure 4. Names of parts of the Power Supply Unit
Table 4: Names and Functions of the Power Supply Unit
No. Names and Functions
1)
POWER SWITCH:
The main power switch of the Recording Control Unit.
2)
FUSE:
Glass fuse (5A) for protecting the power supply line from outside.
3) POWER LED:
Lights when the AC power is supplied from outside. It is turned off when
the power is supplied by the Battery at the time of blackout.
4) BATTERY ABN. LED:
Lights up when the Battery is not ready.
5) BATTERY OP. LED:
Lights up when the Battery is in operation.
6) FAN ABN. LED:
Lights up when either of the two fans stops operation.
7) BLACKOUT TEST SWITCH:
Used to test the blackout functions. When it is held down, the AC power
from outside is shut out. When it is released, the power is restored.
8) BATTERY VOLTAGE TEST TERMINAL:
Used to measure the voltage of the Battery by a multimeter. The charging
voltage can be monitored when the equipment is operated by AC power.
To monitor the battery voltage, be sure that the POWER SWITCH is off.
(Battery voltage: +24V or more)
9) FAN (2 sets: Right side of the Power Supply Unit):
Used to cool down the AC/DC power source. (Its rpm can be monitored)
7) BLACKOUT
TEST SWITCH
9) FAN
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