AR-M620 (serv.man20). (9) Self diag message and troubleshooting - Sharp Copying Equipment Service Manual (repair manual). Page 18

AR-M550/M620  SELF DIAG MESSAGE AND TROUBLESHOOTING  9 - 18

Case 1

Trouble 
position/
Cause

Improper connection or 
disconnection of the 
connector and the 
harness between the 
finisher and the saddle 
unit.

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.

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/punch shift 
motor trouble
When operating the 
punch shift motor, it does 
not move from the home 
position in 4sec.
When operating the 
punch shift motor, it does 
not return to the home 
position in 4sec.

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

Main 
code

Sub 

code

Title

Phenomenon

Display

Lamp
Message

Details

Finisher/punch motor 
trouble
When learning the punch 
unit, it does not complete 
normally and does not 
return to the home 
position.
When executing 
punching, it does not shift 
from the home position in 
0.2sec, or it overruns to 
go into non-HP state.
When operating the 
punch unit, the encoder 
input cannot be detected 
within 0.1sec.

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/ backup RAM 
trouble
When backup RAM data 
check sum is NG when 
turning on the power.

Section

Finisher

Operation 
mode

Note 

Case 1

Trouble 
position/
Cause

Finisher control PWB 
trouble
Malfunction caused by 
noises

Remedy

Replace the finisher 
control PWB.

Note