AR-FN3 (serv.man2). ARFN3-Service Manual - Sharp Copying Equipment Service Manual (repair manual). Page 42

The pusher motor control signal (PMA, A/, B, B/), reversion motor
control signal (RMA, A/, B, B/) and staple unit movement motor con-
trol signal (STUMA, A/, B, B/) from the CPU (IC3) are inputted to the
stepping motor driver IC SLA7024M (IC4, 8, 10), to drive the following
motors: the pusher motor which elevates the paper  inside the staple
tray to the stapling position and paper discharge position; the rever-
sion motor which reverses the paper; and the staple unit moving
motor which moves the staple unit to the stapling position.

The driving method is a unipolar, 2-phase (pusher and tray 3 paper
discharge motor), 1-2 phase (staple unit motor), constant-current
chopper driving method.

•

Push motor drive pattern

•

Tray 3 paper discharge motor drive pattern

•

Staple unit moving motor drive pattern

PMA

PMB

PMA/

PMB/

Up

Stop

Energized  

Down

Tray 3 paper discharge
direction

Stop

T3OMA

T3OMB

T3OMA/

T3OMB/

STUMA

STUMB

STUMA/

STUMB/

Front direction

Stop

Rear direction

Pusher motor drive circuit

Staple unit moving motor drive circuit

Tray 3 paper discharge motor drive circuit

CPU

PB0

PB3

(IC03)

2

5

4

3

PB2

PB1

T30MA
T30MA/
T3M0B
T3M0B/

3

14

10

6

REFA

5

16

17

REFB
RSB
IN A
IN/A
IN B
IN/B

IC08

SLA7024MT

OUT A
OUT/A
OUT B
OUT/B

GA
GB

VSA

7

1

8

11
18

4

15

T30MA
T30MA/
T30MB
T30MB/

+24V

12

VSB

2

9

13

TDA
TDB
RSA

R146

47K

C139

470P

C135

470P

+5V

C07 47U/35V

T30M

+24V

+24V

R141

47K

C137

2200P

R10

1(1W)

R142

2.4K

R11

1(1W)

R144

2.4K

C138

2200P

R143

0.1U

C136

60

R145

910

+5V

PB4

PB7

58

9

8

7

PB6

PB5

PMA
PMA/

PMB
PMB/

3

14
10

6

REFA

5

16

17

REFB
RSB
IN A
IN/A
IN B
IN/B

IC04

SLA7024MT

OUT A
OUT/A
OUT B
OUT/B

GA
GB

VSA

7

1

8

11
18

4

15

PSMA
PSMA/
PSMB

PSMB/

+24V

12

VSB

2

9

13

TDA
TDB
RSA

R121

47K

C126

470P

C122

470P

+5V

C05 47U/35V

PSM

+24V

+24V

R116

47K

C124

2200P

R5

1(2W)

R118

2.4K

R6

1(2W)

R120

2.4K

C125

2200P

R119

0.1U

C123

200

R117

910

+5V

IC102

TD62504F

12

5

P40

P43

18

21

20

19

P42

P41

STUMA
STUMA/
STUMB
STUMB/

3

14
10

6

REFA

5

16

17

REFB
RSB
IN A
IN/A
IN B
IN/B

IC10

SLA7024MT

OUT A
OUT/A
OUT B
OUT/B

GA
GB

VSA

7

1

8

11
18

4

15

STUMA
STUMA/
STUMB
STUMB/

+24V

12

VSB

2

9

13

TDA
TDB
RSA

R159

47K

C158

470P

C154

470P

+5V

C06 47U/35V

STUM

+24V

+24V

R154

47K

C156

2200P

R19

1(1W)

R155

2.4K

R20

1(1W)

R157

2.4K

C157

2200P

R156

0.1U

C155

160

R158

910

+5V

6

P60

PMPD

R131

200

IC102

TD62504F

10

7

60

P62

R140

270

T3MPD

AR-FN3

8/19/1999

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