REV.-A
2.2.4.3
Paper-Feed Motor Drive Circuit
The paper-feed motor drive circuit is shown in Figure 2-40. The paper-feed motor is a step motor which
can utilize 2-2 phase excitation. When the paper-feed signal
PC2 is set to HIGH, Q20 and Q 16 are turned
on, and +24 V is supplied to the motor. When the
via resistor
R42
and diode D6, to hold the motor.
paper-feed motor
‘n
CPU
flPD78
10HG
(2C)
R44
+24V
R36
A
5.6K
1
R45
19
5.6K
PC2
V4V
v
RI 16
33K
GA
E0530
(3 B)
PFA
PFB
PFC
PFD
is not driven, + 5 V is supplied,
+5V
&
R42
EMD! W 39
l/2W
10
9
777
h
12
8
11
8
R87
3.3K
7
9
R89
3.3K
v
V4V
10
R86
3.3K
V“VAV
11
R88
3.3K
VAVAV
T
GP
Figure 2-40. Paper-Feed Motor Drive Circuit
PFCOM
PFCOM
PF A
PF B
PF C
PF D
2-37
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