7) toner motor control circuit, Tonner motor driver – Sharp AL-1651CS Benutzerhandbuch

Seite 110

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AL-1651CS ELECTRICAL SECTION 12 - 9

(7) Toner motor control circuit

The IC32 is the motor drive IC, which generates pseudo-AC wave-
forms by the pulse signal from the ASIC to drive the toner supply
motor.

(8) Main motor control circuit/ LSU (Polygon motor)

control circuit

The motors are driven by the MMD (main motor) signal and the PMD
(polygon motor) signal from the ASIC.

The MMD signal and the PMD signal are turned HIGH and sent

through the driver IC27 to the control circuit in the main motor/LSU,
rotating each motor.

When the motor RPM reaches the specified level, the MMLD signal
(main) and the PMLD signal (LSU) become LOW. The CPU detects it
to start process control.

(9) Mirror motor control circuit, SPF motor control circuit,

Duplex motor control circuit, Shifter motor control
circuit.

Stepping motors are employed for the mirror motor, the SPF motor,
and the duplex motor. The driver for IC29 (for the mirror motor) is the
bipolar drive constant current drive IC. The drive for IC31 (for the SPF)
is the uni-polar drive constant current drive IC. The drive for IC28 (for
the duplex) and IC30 (for the shifter) is the constant current drive IC.

Each motor is driven in W1-2 phase excitement, 1-2 phase excitement,
or 2-phase excitement.

The mirror motor/SPF motor related to image scan are driven by a con-
stant current, and each motor current is switched in each magnification
ratio.

R113
47kJ

21

R112
47kJ

21

C128
10u/35V

1

2

+

R105
1kJ

2

1

R106
1kJ

2

1

IC32

BA6920FP

Vcc

17

GND

8

Rin

20

Fin

18

OUT1

9

OUT2

5

VM

16

VREF

21

RNF

6

PSAVE

19

NC

1

NC

2

NC

3

NC

4

NC

7

NC

10

NC

11

NC

12

NC

13

NC

14

NC

15

NC

22

NC

23

NC

24

NC

25

FIN

FIN

C129

0.1u/50V

1

2

24V

PGND

PGND

PGND

(TM)
(TM_)

TMB_O
TMA_O

(4-D3)
(4-D3)

(11-A1)
(11-A1)

Tonner Motor Driver

IC27

KID65503F

1B

1

2B

2

3B

3

4B

4

5B

5

6B

6

7B

7

G

8

NC

9

1C

16

2C

15

3C

14

4C

13

5C

12

6C

11

7C

10

Q3
KRC106S

1

2

3

R88
10kJ

21

5V

PMD

MM_Y2

MMD

MM_Y1

MM_Y3

/PMD

MMref1

/MMD

MMref2

MMref0

POFF

/POFF

/LEND

SHOLD

(10-B4)
(11-B2)

(11-B2)

(11-A4)

(6-A3)

(6-A3)

(6-A3)

(2-C1)

(2-C1)

(2-C1)

(2-A3)

(2-C1)

(2-A3)

(1-D3)

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