AR-M550 (serv.man11). (6a) List of sections, Operation panel section, Paper feed transport duplex exit revserse sections. - Sharp Copying Equipment Service Manual (repair manual). Page 21

AR-M550/M620  DETAILS OF EACH SECTION  6 - 21

Code

Signal 

name

Name

Function/Operation

Type

Model

Note

M1LUD

M1LUD

Paper tray upper limit detector 
(Paper feed tray 3)

Paper tray upper limit detection 
(Paper feed tray 3)

Transmission 
type

Paper feed tray system 
sensor

M1PED

M1PED

Paper empty detector (Paper 
feed tray 3)

Paper empty detection (Paper 
feed tray 3)

Transmission 
type

Paper feed tray system 
sensor

M1PFD

M1PFD

Paper pass detector (Multi paper 
feed tray 3)

Paper feed tray 3 paper pass 
detection

Transmission 
type

Paper transport system 
sensor

M1PWS

M1PWS

Paper feed tray paper width 
detector (Paper feed tray 3)

Multi paper feed tray paper width 
detection (Paper feed tray 3)

Slide resistor

Analog detector

M1SPD

M1SPD

Paper remaining quantity 
detector (Paper feed tray 3)

Paper remaining quantity 
detection (Multi paper feed tray 3)

Transmission 
type

Paper feed tray remaining 
quantity sensor

M2LUD

M2LUD

Paper tray upper limit detector 
(Paper feed tray 4)

Paper tray upper limit detection 
(Paper feed tray 4)

Transmission 
type

Paper feed tray system 
sensor

M2PED

M2PED

Paper empty detector (Paper 
feed tray 4)

Paper empty detection (Paper 
feed tray 4)

Transmission 
type

Paper feed tray system 
sensor

M2PFD

M2PFD

Paper pass detector (Multi paper 
feed tray 4)

Paper feed tray 4 paper pass 
detection

Transmission 
type

Paper transport system 
sensor

M2SPD

M2SPD

Paper remaining quantity 
detector (Paper feed tray 4)

Paper remaining quantity 
detection (Paper feed tray 4)

Transmission 
type

Paper feed tray remaining 
quantity sensor

M1PFC

M1PFC

Paper feed clutch (Paper feed 
tray 3)

Paper freed tray 3 section roller 
ON/OFF control

Electromagnetic 
clutch

M2PFC

M2PFC

Paper feed clutch (Paper feed 
tray 4)

Paper freed tray 4 section roller 
ON/OFF control

Electromagnetic 
clutch

DSKPFC1

DSKPFC1 Paper feed tray 3/4 paper 

transport clutch 1

Paper feed tray 3/4 section paper 
transport roller ON/OFF control

Electromagnetic 
clutch

M1PUS

M1PUS

Paper pickup solenoid (Paper 
feed tray 3)

Presses the paper pickup roller 
onto paper.

Electromagnetic 
solenoid

M2PUS

M2PUS

Paper pickup solenoid (Paper 
feed tray 4)

Presses the paper pickup roller 
onto paper.

Electromagnetic 
solenoid

MM

MM

Main motor

Drives the paper feed trays 1, 2, 3, 
and 4, and the manual paper feed 
section.

DC brushless 
motor

Paper pass

M2SS PWB

Paper size detection PWB

Paper size detection

No.

Name

Function

1

Paper size detection plate

Changes its own position in conjunction with the paper size (length) adjustment lever. By this 
operation, the paper size detector detects the paper size. 

2

Paper widht guide R

Suppresses skew to the minimum by restricting the paper width.  

3

Paper size detection rotation plate

Changes its own position in conjunction with the paper size (length) adjustment lever. By this 
operation, the paper size detection plate position is changed and the paper size detector detects 
the paper size. 

4

Paper size (length) guide plate

Regulates the paper size (length). 

5

Paper widht guide L

By restricting the paper width, skew is restricted to the minimum. 

6

Lift plate

Lifts the paper to maintain the paper feed position at the fixed position. 

7

Paper pickup roller

Sends paper to the paper feed roller.

8

Separation roller

Separate paper to prevent against double feed

9

Paper feed roller

Feeds paper to the paper transport section. 

10

Transport roller 8 (Paper feed tray 3)
Transport roller 5 (Paper feed tray 4)

Transports paper from the paper feed tray 3 to the transport rollers 9 and 10.
Transports paper from the paper feed tray 4 to the transport rollers 6 and 7.

11

Transport roller 10 (Paper feed tray 3)
Transport roller 7 (Paper feed tray 4)

Transports paper from the transport rollers 7 and 8 to the transport roller 11. 
Transports paper from the transport roller 5 to the transport roller 10.

12

Torque limiter

Provides a certain level of resistance power for the paper separation roller rotation to prevent 
against double feed.