MX-1800N (serv.man33). Details of each Section - M Process Control Sensor, Registration Sensor Section - Sharp Copying Equipment Service Manual (repair manual)

MX-1800N  PROCESS CONTROL SENSOR, REGISTRATION SENSOR SECTION  M – 1

MX-1800N

Service Manual

 

The shutter is provided on the monochrome (PCS_K) and color
(PCS_CL) process control sensor. When the shutter is opened (the
image density is corrected), the toner patch formed on the transfer
belt is scanned by the process control sensor and the information is
passed to the PCU.
When the shutter is closed, the gray resin section on the back of
the shutter is scanned to perform calibration of the sensor itself. 
The shutter operation is controlled by the process control shutter
solenoid (PCSS). 

The registration sensor is attached to the F side (REGS_F) and the
R side (REGS_R). When the shutter is opened, the registration
image formed on the transfer belt is scanned by the sensor and the
information is passed to the PCU.

PCS_CL/K

Process control sensor

Detects the toner patch density.

PCSS

Process control shutter solenoid

Opens/closes the shutter of the process control and the registration sensor. 

REGS_F/R

Resist sensor

Detects the resist shift.

PCSS

PCS_CL/K

REGS_F

REGS_R

CN17

RESI SENSOR F

PROCON SENSOR

RESI SENSOR R

R

SM2P

P

R

SM18P

P

B32B-PHDSS-B

DF11-6DP-SP1

/PCSS

24V3

PCS_LED#

5VNPD

D-GND

14

15

5VNPD

D-GND

REGS_F

REGS_F_LED#

5VNPD

D-GND

PCS_CL

PCS_K

9

10

11

12

2
1

/PCSS

24V3

2
1

4
3
2
1

5VNPD
D-GND

REGS_R

REGS_R_LED#

PCS_LED#

5
4
3
2
1

5VNPD
D-GND

PCS_CL

PCS_K

REGS_F

REGS_F_LED#

4
3
2
1

5VNPD
D-GND

1

2

3

4

5

6

7

8

1

20

REGS_F

25

D-GND

22

REGS_F_LED#

REGS_R

24

REGS_R_LED#

23

5VNPD

27

D-GND

26

2

3

4

5

6

7

8

9

10

11

12

13

14

15

13

REGS_R

REGS_R_LED#

19

PCS_K

18

PCS_LED#

21

PCS_CL

28

D-GND

PCU

P

WB

1

5

6

2

3

4

17

/PCSS

16

24V3

5VNPD

5VNPD

5VNPD

5VNPD

5VNPD

5VNPD

MX-1800N  PROCESS CONTROL SENSOR, REGISTRATION SENSOR SECTION  M – 2

1) Remove the developing unit (K).
2) Remove the drum unit (K).
3) Remove the primary trasnfer unit.
4) Remove the paper feed tray 1.
5) Remove the rear cabinet.
6) Remove the ADU connection drive.
7) Remove the resist roller unit.
8) Disconnect the connector. Remove the screws. Release the

pawl, then remove the process control sensor.

b. Process control sensor
1)

Remove the process control sensor unit.

2)

Push up the shutter operation plate, and clean the registration
sensor (A) and the process control sensor (B). 

c. Process control shutter solenoid
1)

Remove the process control sensor unit.

2)

Remove the screw, slide the sensor mounting stay, and
remove the sensor mounting stay. 

3)

Remove the screws. Disconnect the connector, and remove
the process control shutter solenoid.
* When installing, engage the process control shutter solenoid

with the groove in the shutter mounting plate (A). 

(1)

Process 
control 
sensor unit

a

Resist sensor

{

b

Process control sensor

{

c

Process control shutter 
solenoid

(1)-a

(1)-a

(1)

(1)-c

(1)-b