Panasonic FP-7818 Service Manual & Parts Manual page 324

(2) Paper transport motor control
A4-phase (FA-S660)/2-phase (FA-S620) control stepping motor is used for the
feed motor. The feed speed is controlled by the number of pulses ofthe pulse
signal A, A*, B, and B* of the motor driver IC (Q19: FA-S620, Q23: FA-S660).
Sorter Controller PCB
FMTA
FMTB
Q4
CPU
Sorter Controller PCB
FMTA
FMTA*
FMTB
Q1
CPU
FMTB*
A
Q19
Motor A*
driver
B
B*
FA-S620
+24V
A
Q23
Motor A*
driver
B
B*
FA-S660
Feed motor
M3
Feed motor
M3
4-3