Printer Motor Drive Circuit - Panasonic UF-580 Service Manual

6.2.10 Printer Motor Drive Circuit

Motor Drive Circuit
The Printer Motor is a 4-phase uni-polar PM-type step motor. The step signals (pMMP0A to pMMP3A)
are transmitted to IC38 (the Chopper Drive Circuit) from IC3 SHINE output ports. The chopper current is
determined by the voltage at IC38, Pin3 and Pin13. The Printer Motor has two speeds, Slow and
Constant. The Printer Motor is powered by a +24 VDC supply. When the interlocks are open, the +24
VDC supply is cut off and the Printer Motor stops rotating.
SHINE
IC3
Motor
Driver
IC38
Laser Printer Motor Drive Circuit Block Diagram
+24 VM
CN54
3 pMMP0a
1 nMMP0a
6 pMMP2a
4 nMMP2a
211
Pulse
Motor