Panasonic KX-F1200 Service Manual And Technical Manual page 109

KX-F1200
3) RX Motor
RX motor is used to transier the recording paper and ink ribbon and its torque is higher than that of ] X motor. Therefore, TX
motor driver uses the transistor array but RX motor driver uses the chopper IC of current drive type.
The inside of chopper IC and the peripheral circuit diagram are shown below.
Circuit Diagram
IC407
Motor _"
Crrent -{
Control L
+24V ,
B
#-_ #.(
II
C606
R631
R640
IC404-RXE
R621
CPU-P32
R627
CPU-P33 _)
II
C607
iR632
+5V
R628
R629
CN409
o
o-
o--
-.o-
-- RX Motor
_633
PG(Power GND)
Motor t
Phase
Pattern
IC404-RM0
IC404-RM1
IC404-RM2
IC404-RM3 --
O INA
O INB
.0vl- ; o;::
R622_ I I R624_
c'o
0604
j bove
motor
driverlC
input
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