AR-M700 (serv.man28). Self diag message and troubleshooting - Sharp Copying Equipment Service Manual (repair manual). Page 31

AR-M550/M620/M700  SELF DIAG MESSAGE AND TROUBLESHOOTING  9 - 31

Main 
code

Sub 

code

Title

Phenomenon

Display

Lamp
Message

Details

Drum motor lock 
detection
The motor lock signal is 
detected for 1.5sec 
during rotation of the 
drum motor.

Section

Engine

Operation 
mode

Note 

Case 1

Trouble 
position/
Cause

Drum motor trouble

Remedy

Use SIM 6-1 to check the 
drum motor operation.

Note 

Case 2

Trouble 
position/
Cause

Improper connection of 
the harness between the 
PCU PWB and the drum 
motor
Control circuit trouble

Remedy

Check the harness and 
the connector of the PCU 
PWB, and the drum 
motor.

Note 

Main 
code

Sub 

code

Title

Phenomenon

Display

Lamp

Message

Details

Fusing motor lock 
detection
Three successive trouble 
signals are detected after 
600 msec from starting 
the fusing motor.

Section

Engine

Operation 
mode

Note 

Case 1

Trouble 
position/
Cause

Fusing motor trouble

Remedy

Use SIM 6-1 to check the 
fusing motor operation.

Note 

Case 2

Trouble 
position/
Cause

Improper connection of 
the harness between the 
PCU PWB and the fusing 
motor
Control circuit trouble

Remedy

Check connection of the 
harness and the 
connector between the 
PCU PWB and the fusing 
motor.

Note 

Main 
code

Sub 

code

Title

Phenomenon

Display

Lamp
Message

Details

Developing motor lock 
detection
The motor lock signal is 
detected for 1.5sec 
during rotation of the 
developing motor

Section

Engine

Operation 
mode

Note 

Case 1

Trouble 
position/
Cause

Developing motor trouble

Remedy

Use SIM 6-1 to check the 
developing motor 
operation.

Note 

Case 2

Trouble 
position/
Cause

Improper connection of 
the harness between the 
PCU PWB and the 
developing motor
Control circuit trouble

Remedy

Check the harness and 
the connector between 
the PCU PWB and the 
developing motor.

Note 

Main 
code

Sub 

code

Title

Phenomenon

Display

Lamp
Message

Details

Transfer belt separation 
motor trouble detection
The transfer belt home 
position sensor ON/OFF 
is not detected within the 
specified time (4 sec) 
during operation of the 
transfer belt (separation, 
contact).

Section

Engine

Operation 
mode

Note 

Case 1

Trouble 
position/
Cause

Transfer belt separation 
motor trouble

Remedy

Use SIM 6-1 to check the 
transfer belt motor 
operation.

Note 

Case 2

Trouble 
position/
Cause

Improper connection of 
the harness between the 
PCU PWB and the 
transfer belt separation 
motor.
Control circuit trouble

Remedy

Check connection of the 
harness and the 
connector between the 
PCU PWB and the fusing 
motor.

Note