2F3/2F4
2-3-5
(2) Interlock and 24 V DC power supply circuit
Figure 2-3-4
The 24 V DC power source line is shut off by the top cover/feed unit switch or the side cover switch that is turned OFF
when the top cover or the side cover is opened. At the same time, the 24 V DC power supply is stopped to the motor and
clutch and it is also output to the ASIC of the engine controller PWB as the cover open detection signal.
The 24 V DC power is divided into five groups of +24V1, +24V2, and +24V3 as figure 2-3-4, and the loads that supply the
24 V DC power source or the cover open detection signals are different.
In the Eco-power mode, the circuit shuts off the +24V power source that is used by the printer unit in order to reduce the
power consumption. In the Eco-power mode, the sleep signal (SLEEP) becomes L level, which is output from the CPU of
the engine controller PWB. The signal at this level turns off the FET of the Eco-circuit, accordingly the supply of +24V1 to
the power line is shut off and the operation of connected load will stop.
Top cover/
feed unit
switch
Top cover
switch 1
Rear
cover
sensor
Top cover
switch 2
Side cover
switch
Power supply PWB
Engine controller PWB
Sensor PWB
+24V1
+24V1
+24V1
+24V2
+24V2
+24V3
+24V3
+24V3
+24V2
+24V2
SLEEP
+24V2
+24V3
1
Main high
voltage PWB
Fuser PWB
RCOVOP
TOPCOVP
FEEDOP
SCOVOP
TOPCOVP2
ASIC
2
24 V DC
output
circuit
1
: Power supply to main fan motor
2
: Power supply to eraser lamp, drum motor 1/2/3/4, primary transfer motor, feed motor,
fuser motor, ozone fan motor 1/2, bias high voltage PWB, feed clutch, registration clutch,
MP tray feed solenoid, toner sensor 1/2/3/4, optional paper feeder, and optional duplexer, etc.
FET
Содержание C5020N - FS Color LED Printer
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