Read Sharp AR-FN5 (serv.man3) Service Manual online
9. DC motor drive circuit
There are two kinds of DC motors: the lift-up motor which moves up
and down the offset tray, and the offset motor which distribute paper.
and down the offset tray, and the offset motor which distribute paper.
The control signal sent from the CPU is passed to the H driver IC
TA7291S (IC5, 11) exclusive for each DC motor, driving the motor.
TA7291S (IC5, 11) exclusive for each DC motor, driving the motor.
The driver IC can be controlled in CW/CCW. The offset motor can be
controlled only in CW.
controlled only in CW.
·
Lift-up motor
LUM+
LUM-
Rotating direction
Operating direction
0
0
Stop
Stop
1
0
CW
Up
0
1
CCW
Down
1
1
Brake
Brake
·
Offset motor
LUM+
LUM-
Rotating direction
Operating direction
0
0
Stop
Stop
1
0
CW
Offset operation
0
1
CCW
Not used
1
1
Brake
Brake
5V
5V
+
7
1
5
6
6
2
10
VS
8
4
NC
3
NC
9
D2
+
+
+
7
1
5
6
6
2
10
VS
8
4
NC
3
NC
9
24V
C8
10uF/35V
F12
ICP-N38
ICP-N38
R162
100K
100K
R163
100K
100K
R167
10K
R168
10K
10K
Q8
2SA1680
1SS133
D6
C169
0.047uF/50V
C163
0.047uF/50V
0.047uF/50V
R169
10K
R155
10K
10K
IC11
TA7291P
1SS133
GND
Vref
OUT2
OUT1
IN2
IN1
VCC
C9
10uF/16V
R170
47K
47K
R164
47K
47K
LUM-
LUM+
43
42
DCCON 64
P35
PE3
PE2
R140
47K
47K
Q9
DTC114EK
24V
C1
10uF/35V
F3
ICP-N38
ICP-N38
D1
1SS133
Q3
2SA1680
R130
100K
100K
R131
100K
100K
R136
100K
R137
100K
100K
C133
0.047uF/50V
C114
0.047uF/50V
0.047uF/50V
R115
10K
10K
R138
10K
IC5
TA7291P
GND
Vref
OUT2
OUT1
IN2
IN1
VCC
C2
10uF/16V
R139
47K
47K
R132
47K
47K
CPU(IC8)
OFM-
OFM+ 45
46
PE5
PE4
Q4
DTC114EK
OFMD-
OFMD+
OFM
LUMD-
LUMD+
LUM
10k
10k
10k
10k
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