Printer Motor Drive Circuit - Panasonic UF-585 Service Manual

Panasonic UF-585 / 595
6.2.11

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 IC6
(the Chopper Drive Circuit) by means of a CPU with real-time output function. The chopper current is determined by the voltage
at IC6, Pin3 and Pin13. The Printer Motor has two speeds, Slow and Constant. The Printer Motor is powered by a +24 VDC sup-
ply. When the interlocks are open, the +24 VDC supply is cut off and the Printer Motor stops rotating.
CPU
IC1
212
CN53
Motor
Driver
IC6
Laser Printer Motor Drive Circuit Block Diagram
+24 VM
3 pMMP0a
1 nMMP0a
6 pMMP2a
4 nMMP2a
Pulse
Motor