Panasonic UF-580 Technical Manual page 21

1.1.11 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
Ver 2.00
Motor
Driver
IC38
Laser Printer Motor Drive Circuit Block Diagram
+24 VM
CN54
3 pMMP0a
1 nMMP0a
6 pMMP2a
4 nMMP2a
21
UF-580/590/780/790
DX-600/800
Pulse
Motor
DEC 2003