MX-PNX1C (serv.man6). Section -4 - Outside View and Internal Structure . - Sharp Copying Equipment Service Manual (repair manual). Page 5

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MX-FNX1/MX-PNX1  EXTERNAL VIEW AND INTERNAL STRUCTURE  4 – 5
(2) MX-PNX1A/B/C/D
No.
Signal
Name
Function
1
FPNM
Punch motor
Drives the punch unit up/down.
2
FPSM
Punch horizontal resist motor
Shifts the punch unit to the center of paper. 
3
Punch PWB
Controls the punch unit. 
4
LED light emitting PWB
Detects the paper rear edge and the punch horizontal resist. 
5
LED light receiving PWB
Detects the paper rear edge and the punch horizontal resist.
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