AR-M550 (serv.man16). (9) Self diag message and troubleshooting - Sharp Copying Equipment Service Manual (repair manual). Page 15

AR-M550/M620  SELF DIAG MESSAGE AND TROUBLESHOOTING  9 - 15

Main 
code

Sub 

code

Title

Phenomenon

Display

Lamp
Message

Details

Finisher communication 
trouble
An error in the 
communication line test 
after turning on the power 
or canceling the 
simulation
Communication error with 
the finisher
Follows the 
communication protocol 
specifications.
Communication error, 
timing abnormality of the 
communication data and 
the communication signal 
line

Section

Engine

Operation 
mode

Note 

Case 1

Trouble 
position/
Cause

Improper connection or 
disconnection of the 
connector or harness 
between the machine and 
the finisher

Remedy

Check the connector and 
the harness in the 
communication line.

Note 

Case 2

Trouble 
position/
Cause

Finisher control PWB 
trouble
Control PWB (PCU) 
trouble

Remedy

Replace the finisher 
control PWB or the PCU 
PWB.

Note 

Case 3

Trouble 
position/
Cause

Malfunction caused by 
noises

Remedy

Canceled by turning ON/
OFF the power.

Note 

Main 
code

Sub 

code

Title

Phenomenon

Display

Lamp
Message

Details

Finisher transport motor 
abnormality
When opening the shutter 
unit, the opening process 
is not completed in 1sec.
When closing the shutter 
unit, the closing process 
is not completed in 1sec.
When the tray lift unit is 
operating in the 
dangerous area, “Not 
closed state” of the 
shutter close sensor is 
detected.

Section

Finisher

Operation 
mode
Note 

Case 1

Trouble 
position/
Cause

Motor lock
Motor RPM abnormality
Overcurrent to the motor
Finisher control PWB 
trouble

Remedy

Use SIM 3-3 to check the 
transport motor operation.

Note 

Main 
code

Sub 

code

Title

Phenomenon

Display

Lamp
Message

Details

Finisher oscillation motor 
trouble
When opening the 
oscillation unit, the 
opening process is not 
completed in 1sec.
When closing the 
oscillation unit, the 
closing operation is not 
completed in 3sec.
When the tray lift unit is 
operating in the 
dangerous area, “Not 
closed state” of the 
oscillation unit close 
sensor is detected.
When controlling the 
oscillation unit speed, the 
encoder input cannot be 
detected within a 
specified time.

Section

Finisher

Operation 
mode
Note 

Case 1

Trouble 
position/
Cause

Motor lock
Motor RPM abnormality
Overcurrent to the motor
Finisher control PWB 
trouble

Remedy

Use SIM 3-3 to check the 
motor operation.

Note