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MX-M1100  DSPF SECTION  C – 9

1)

Remove the front cabinet and the rear cabinet.

2)

Remove the paper feed unit.

3)

Remove the screw (a), and remove the cover (b).

4)

Disconnect the connector (a), and remove the DSPF docu-
ment tray upper limit sensor (b).

5)

Remove the screw (a), and disconnect the connector (b), and
remove the DSPF paper pass sensor 1 (c) and the DSPF ran-
dom sensor (d).

1)

Remove the front cabinet and the rear cabinet.

2)

Remove the document tray unit.

3)

Remove the paper feed unit.

4)

Remove the screw (a), and remove the double feed detection
unit (b).
* Since the harness is kept connected, be careful not to break

it.

5)

Remove the E-ring (a), and remove the No.1 resist roller (idle)
(b).

6)

Remove the screw (a) and the step screw (b), and remove the
paper guide (c).

a

b

a

b

a

c

d

b

a

a

b

b

a

c

a

b

a

MX-M1100  DSPF SECTION  C – 10

7)

Disconnect the connector (a), and remove the DSPF docu-
ment tray lower limit sensor (b).

* Since the DSPF double feed sensor (transmitting), the DSPF

double feed sensor (receiving), and the double feed detection
PWB comprise one set, do not replace each one of them sepa-
rately. Always replace them in one set. Each part is marked with
its serial number. Before replacement, check to confirm that the
serial number of each part corresponds.

1)

Remove the front cabinet and the rear cabinet.

2)

Remove the screw (a) and the step screw (b), and remove the
paper guide (c).

3)

Remove the snap band (a), and disconnect the connector (b).
Remove the screw (c), and remove the double feed detection
unit (d).

A

DSPF paper pass sensor 2

C - 10/ (1)

B

DSPF upper door open/close sensor

C

DSPF double feed sensor (transmitting)

D

DSPF double feed sensor (receiving)

E

Double feed detection PWB

F

DSPF paper pass sensor 3

C - 12/ (2)

G

DSPF paper pass sensor 4

H

No. 1 resist roller

C - 13/ (3)

I

Transport roller 1

C - 13/ (4)

J

Transport roller 2

a

b

I

F

E

H

J

G

D

C

A

B

a

b

c

b

c

c

d

a

b

a

MX-M1100  DSPF SECTION  C – 11

4)

Remove the screw (a), and disconnect the connector (b).
Remove the mounting plate (c).
* When connecting, arrange the harness of the connector (b)

under the sensor. 

5)

Remove the screw (a), and remove the DSPF paper pass sen-
sor 2 (b).
* When installing the sensor, check to confirm that the sensor

boss (c) is securely engaged and fix it with the screw.

6)

Disconnect the connector (a), and remove the DSPF upper
door open/close sensor (b).

7)

Disconnect the connector (a). Remove the screw (b) and the
plate (c). Remove the DSPF double feed sensor (transmitting)
(d).
* When installing the double feed sensor (transmitting), check

to confirm that "S" mark (e) is engraved on the top of the
sensor.

* Install so that the white dot (a) on the side of the sensor

faces toward the marking (b) and so that the white dot (a)
can be seen from the slit.

8)

Remove the tape (a), and disconnect the connector (b). 
Remove the screw (c) and the holder (d). Remove the DSPF
double feed sensor (receiving) (e).
* When installing the double feed sensor (receiving), 

check to confirm that "R" mark (f) is engraved on the top of
the sensor.

a

c

b

a

b

c

a

b

b

c

a

d

e

b

a

a

b

e

c

d

f

MX-M1100  DSPF SECTION  C – 12

* When installing the double feed sensor (receiving), arrange

it so that the bottom line (a) of the square encircling the "R"
mark on the holder is on the same side of the white dot (b)
on the back of the sensor. (Within 

± 10 degrees)

9)

Disconnect the connector (a), and remove the screw (b), and
remove the double feed detection PWB (c).

1)

Remove the front cabinet and the rear cabinet.

2)

Disconnect the connector (a), the step screw (b), and the E-
ring (c). Remove the upper door (d).

3)

Remove the E-ring (a), and remove the shaft (b).

4)

Remove the screw (a), and remove the cover (b).

5)

Remove the screw (a), and disconnect the connector (b), and
remove the mounting plate (c). Remove the screw (d), and
remove the DSPF paper pass sensor 3 (e) and the DSPF
paper pass sensor 4 (f).
* When installing the sensor, check to confirm that the sensor

boss (g) is securely engaged and fix it with the screw.

R

a

b

b

b

c

a

a

a

d

c

b

a

b

a

a

a

b

a

c

e

b

d

a

c

f

d

b

g