Interlock And 24 V Dc Power Supply Circuit - Kyocera Mita FS-C5016N - Color LED Printer Service Manual

(2) Interlock and 24 V DC power supply circuit

Power supply PWB
Q101
24 V DC
FET
output
circuit
Main high
voltage PWB
+24V3
Fuser PWB
+24V2
Rear
cover
sensor
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.
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 transistors (Q101) of the Eco-circuit, accordingly the supply
of +24V1 to the power line is shut off and the operation of connected load will stop.
Engine controller PWB
1
+24V1
+24V1
2
SLEEP
+24V2
+24V2
+24V3
FEEDOP
SCOVOP
ASIC
TOPCOVP
RCOVOP
TOPCOVP2
Figure 2-3-4
Sensor PWB
Top cover/
Side cover
feed unit
switch
switch
+24V2
+24V1
+24V2
+24V3
Top cover
switch 1
Top cover
switch 2
FS-C5016N
+24V3
2-3-5