Panasonic KX-B620 - Circuit Operation

KX-B620 Series
KX-B520 Series
2-4 Stepping Motor Drive Circuit
1) Function
Two stepping motors are used for screen feed and paper feed.
2) Circuit Operation = p-ak:
Stepping pulses are output from CPU, causing drivers !C104, 1C105 to go ON.
It makes a 1-step rotation.
Circuit Diagram and Timing Chart are shown below.
+24V
cc
pigeon TS
pst I SS OT
ref ET AD SE
yeas 0
ae as
PMA 2
PMB
PMB
Fig. 20 Circuit Diagram and Timing Chart