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low pressure power, and supplies to the host machine.
2.7.1.2 Other Function
2.7.1.2.1 Protective function
The low-voltage power supply has a protective function against overcurrent and overvoltage to prevent failures in the power supply circuit. If there flows an over-
current or overvoltage, the low-voltage system automatically cuts off the output voltage.
If the DC voltage is not being supplied from the low-voltage power supply, turn off the power switch and unplug the AC power cord. Do not turn the power switch
on again until the root cause is found.
In addition, two fuses in the fixing power supply protect against overcurrent. If overcurrent flows into the AC line, the fuses blow and cut off the AC power.
2.7.1.2.2 Power-save mode
The power-save mode reduces power consumption of the printer.
When the low-voltage power supply receives the POWER SAVE (REM24V) signal from the DC controller, it stops the power supply from the +24V generation
circuit.
2.8 ENGINE CONTROL SYSTEM
2.8.1 Construction
2.8.1.1 Outline
The DC controller controls the operational sequence of the printer.
AC input
Cartridge
ITB unit
Formatter
DC controller
Fixing unit
Power supply
unit
Low-voltage
power supply
High-voltage
power supply
Option
Operation panel
F-2-21
Chapter 2
Fan
M
Motor
Solenoid
CL
Clutch
Switch
Photointerrupter
Sensor
Laser scanner
0021-2057
0021-2058
0021-2059
2-17
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