AR-M550 (serv.man16). (9) Self diag message and troubleshooting - Sharp Copying Equipment Service Manual (repair manual). Page 17

AR-M550/M620  SELF DIAG MESSAGE AND TROUBLESHOOTING  9 - 17

Main 
code

Sub 

code

Title

Phenomenon

Display

Lamp
Message

Details

Finisher tray lift motor 
trouble
When operating the tray 
lift unit, the process is not 
completed in 12sec.
When the tray lift unit is 
lifting, the tray lift unit 
upper limit sensor ON is 
detected.
When operating the tray 
lift unit, en encoder input 
is not detected in 0.2sec.

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 
elevator motor operation.

Note 

Main 
code

Sub 

code

Title

Phenomenon

Display

Lamp

Message

Details

Finisher/alignment motor 
trouble
When operating the 
alignment motor, it does 
not move from the home 
position in 2sec.
When operating the 
alignment motor, it does 
not return to the home 
position in 2sec.

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 

Main 
code

Sub 

code

Title

Phenomenon

Display

Lamp
Message

Details

Finisher saddle folding 
sensor trouble
When the motor rotation 
speed (linear velocity) at 
every 200msec falls 
below the specified level.
When moving to the 
home position, the home 
position sensor does not 
turn on within the 
specified time.
When shifting from the 
home position to the lead 
edge, the home position 
sensor does not turn off 
within the specified time.

Section

Finisher

Operation 
mode

Note 

Case 1

Trouble 
position/
Cause

Sensor breakage
Harness disconnection
Console finisher control 
PWB trouble

Remedy

Use SIM 3-2 to check the 
sensor operation.

Note 

Main 
code

Sub 

code

Title

Phenomenon

Display

Lamp
Message

Details

Communication error 
between the finisher and 
the saddle
When the motor rotation 
speed (linear velocity) at 
every 200msec falls 
below the specified level.
When moving to the 
home position, the home 
position sensor does not 
turn on within the 
specified time.
When shifting from the 
home position to the lead 
edge, the home position 
sensor does not turn off 
within the specified time.

Section

Finisher

Operation 
mode

Note