DOWNLOAD Sharp AR-M351U / AR-M451U (serv.man12) Service Manual ↓ Size: 1.29 MB | Pages: 12 in PDF or view online for FREE

AR-M351U/M451U, AR-M355U/M455U  MAINTENANCE AND DETAILS OF EACH SECTION  7 - 30

Paper remaining quantity detection is common in each tray except for the manual feed tray. Remaining quantity is indicated in 3 steps plus
paper empty (4 steps in total).

Paper remaining quantity is detected by the number of times of changing of the remaining quantity sensor from when the tray starts lifting up
to when the upper limit sensor turns on.

Paper empty is detected by 
the paper empty sensor.

1/3 area 
sensor logic LOW

2/3 area 
sensor logic HIGH

3/3 area
sensor logic LOW

When paper empty is detected

Paper remaining quantity at 1/3

Paper remaining quantity at 2/3

Paper remaining quantity at 3/3

Rotating plate

MCPED
 (Paper empty sensor)

Paper remaining quantity 
detection actuator

MCSPD 
(Paper remaining quantity sensor)

(Remaining quantity sensor status change when the tray is moving up and remaining quantity)

Indication of remaining quantity

Sensor status

Paper quantity: 100%

Paper quantity sensor: OFF

Paper quantity: 66%

Paper quantity sensor: ON

Paper quantity: 33%

Paper quantity sensor: OFF (2nd time)

Paper quantity: 0%

Paper sensor: OFF

AR-M351U/M451U, AR-M355U/M455U  MAINTENANCE AND DETAILS OF EACH SECTION  7 - 31

1) Pull out No. 1 paper feed tray unit.

2) Disengage the pawl, and remove the paper guide.

Unit name

No.

Part name

When 

calling

100K

200K

300K

400K

500K

600K

700K

800K

Remark

Paper feed 

section

1

Pick-up roller

✕

✕

✕

✕

✕

✕

✕

✕

✕

Note 1

2

Paper feed roller

✕

✕

✕

✕

✕

✕

✕

✕

✕

Note 1

3

Separation roller

✕

✕

✕

✕

✕

✕

✕

✕

✕

Note 1

4

Torque limiter

✕

✕

✕

✕

✕

✕

✕

✕

✕

Note 1

Note 1: Replacement reference: Use the counter value of each paper feed port as the replacement reference.

                                       Paper feed roller/Separation pad/Torque limiter section (Include Desk, Multi purpose): 100K or 1 years

4

2

1

3

No.

Unit

Parts

a

1

Pick-up roller

✕

2

Paper feed roller

✕

3

Separation roller

✕

4

Torque limiter

✕

5

Paper feed cassette upper limit 
detection

6

Paper feed cassette paper 
empty detection

7

Cassette detection PWB

8

Lift-up motor

a-2

a-8

a-1

a-5

a-6

a-3

a-4

a-7

AR-M351U/M451U, AR-M355U/M455U  MAINTENANCE AND DETAILS OF EACH SECTION  7 - 32

3) Disengage the pawl, and remove the pickup roller and the

paper feed roller.

4) Disengage the pawl, and remove the separation roller and the

torque limiter.

1) Pull out No. 1 paper feed tray unit, and remove the paper

guide.

2) Remove the screw, and remove the pickup roller arm.

3) Remove the paper feed roller and each part.

4) Remove the pickup roller shaft, and remove the pickup roller

guide.

5) Remove the actuator.

6) Remove the connector, the paper feed cassette upper limit

detection, and the paper feed cassette paper empty detection.

1) Remove the screw, and remove the rear cabinet.

2) Remove the connector, and remove the cassette detection

PWB.

1) Remove the screw, and remove the rear cabinet.

2) Remove the connector and the screw, and remove the lift-up

motor unit.

AR-M351U/M451U, AR-M355U/M455U  MAINTENANCE AND DETAILS OF EACH SECTION  7 - 32

3) Disengage the pawl, and remove the pickup roller and the

paper feed roller.

4) Disengage the pawl, and remove the separation roller and the

torque limiter.

1) Pull out No. 1 paper feed tray unit, and remove the paper

guide.

2) Remove the screw, and remove the pickup roller arm.

3) Remove the paper feed roller and each part.

4) Remove the pickup roller shaft, and remove the pickup roller

guide.

5) Remove the actuator.

6) Remove the connector, the paper feed cassette upper limit

detection, and the paper feed cassette paper empty detection.

1) Remove the screw, and remove the rear cabinet.

2) Remove the connector, and remove the cassette detection

PWB.

1) Remove the screw, and remove the rear cabinet.

2) Remove the connector and the screw, and remove the lift-up

motor unit.