MX-FN27. Service Manual for N Version - Sharp Copying Equipment Service Manual (repair manual). Page 44

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MX-FN27 N, MX-PN14  OPERATIONAL DESCRIPTION  6 – 18
7. Power supply
A. Outline
When the host machine is turned on, it supplies the finisher controller PWB with 24 VDC and 5 VDC. The 24 VDC power is used to drive the motors
and the switches, while the 5 VDC power is for the sensors and the like.
B. Protective Functions
The finisher controller PWB is provided with fuses (FU1 through 4) which blow in response to overcurrent.
FNM 
Stapler motor
Stack Tray  
Paper Height Sensor 
Sensors 
FNPS1 to FNPS8,  
FNPS10 to FNPS16 
Finisher controller PWB (PWB1)
CPU(IC1) 
Host 
machine 
Front Cover Switch
F1 
5VDC 
+3.3VDC 
24VDC 
+3.3V 
generation 
circuit 
Motors 
FNM1 to FNM7,  
FNM9 to FNM10 
F3 
F2 
SW1
FNSTPLIF
FNPS9 
FU4
Rear paper 
flap solenoid
FNSL
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