AR-M700 (serv.man28). Self diag message and troubleshooting - Sharp Copying Equipment Service Manual (repair manual). Page 22

AR-M550/M620/M700  SELF DIAG MESSAGE AND TROUBLESHOOTING  9 - 22

Main 
code

Sub 

code

Title

Phenomenon

Display

Lamp
Message

Details

Inserter/reverse sensor 
trouble
Auto adjustment failure 
on turning on the power

Section

Inserter

Operation 
mode
Note 

Case 1

Trouble 
position/
Cause

Auto adjustment failure 
on turning on the power
Sensor breakage
Harness disconnection
Inserter PWB trouble

Remedy

Use SIM 3-2 to check the 
sensor operation.

Note 

Main 
code

Sub 

code

Title

Phenomenon

Display

Lamp

Message

Details

Toner control sensor 
output open
After completion of auto 
development adjustment, 
during process operation, 
the toner sensor output is 
detected as 0.5V or less 
or 4.5V or above three 
times.

Section

Engine

Operation 
mode
Note 

Case 1

Trouble 
position/
Cause

Connector harness 
trouble
Connector not connected.

Remedy

Check connection of the 
toner control sensor.
Check connection of the 
connector harness to the 
main PWB.
Check for disconnection 
of the harness.

Note 

Main 
code

Sub 

code

Title

Phenomenon

Display

Lamp
Message

Details

Toner supply abnormality
Toner remains in the 
toner bottle when 
undertoner is detected by 
the toner concentration 
sensor in the developing 
unit.

Section

Engine

Operation 
mode
Note 

Case 1

Trouble 
position/
Cause

Toner concentration 
sensor trouble
Toner remaining quantity 
sensor trouble
Connector harness 
trouble for the above 
sensors.

Remedy

Check connector of 
hopper unit toner motor 
(TM1)
Check connector of toner 
bottle toner motor (TM2)
Check connection of the 
connector harnesses to 
the main PWB.
Check broken harness for 
above connections.
Check output of the toner 
concentration sensor 
(SIM25-1)
Check output of the toner 
remaining quantity sensor 
(SIM10-2)

Note 

Main 
code

Sub 

code

Title

Phenomenon

Display

Lamp

Message

Details

An improper toner bottle 
is inserted.
CRUM (IC chip trouble)

Section

Engine

Operation 
mode

Note 

Case 1

Trouble 
position/
Cause

IC chip trouble
Improper cartridge

Remedy

Insert a proper cartridge.

Note