AR-M550 (serv.man16). (9) Self diag message and troubleshooting - Sharp Copying Equipment Service Manual (repair manual). Page 39

AR-M550/M620  SELF DIAG MESSAGE AND TROUBLESHOOTING  9 - 39

Main 
code

Sub 

code

Title

Phenomenon

Display

Lamp
Message

Details

Communication trouble 
with the LCC.
Follows the 
communication protocol 
specifications.
Communication error, 
timing abnormality of the 
communication data and 
the communication signal 
line

Section

LCC

Operation 
mode

Note 

Case 1

Trouble 
position/
Cause

Improper connection or 
disconnection of the 
connector and the 
harness
Desk control PWB trouble
Control PWB (PCU) 
trouble
Malfunction caused by 
noises

Remedy

Canceled by turning ON/
OFF the power.
Check the connector and 
the harness in the 
communication line.

Note 

Main 
code

Sub 

code

Title

Phenomenon

Display

Lamp

Message

Details

LCC transport motor 
trouble
The lock detection signal 
is detected continuously 
for 1sec after delay of 
1sec from start of the 
motor.

Section

LCC

Operation 
mode

Note 

Case 1

Trouble 
position/
Cause

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

Remedy

Use SIM 4-3 to check the 
transport motor 
operation.

Note 

Main 
code

Sub 

code

Title

Phenomenon

Display

Lamp
Message

Details

LCC 24V power 
abnormality addition
24V power is not supplied 
to the LCC. (the LCC 24V 
power is not detected for 
1 sec or longer after 1 sec 
from power on)

Section

LCC

Operation 
mode
Note 

Case 1

Trouble 
position/
Cause

Improper connection or 
disconnection of the 
connector and the 
harness

Remedy

Check the connector and 
the harness of the power 
line.

Note 

Case 2

Trouble 
position/
Cause

LCC control PWB trouble
Power unit trouble

Remedy

Check the 24V power 
with the power unit and 
the LCC control PWB.

Note 

Main 
code

Sub 

code

Title

Phenomenon

Display

Lamp

Message

Details

Communication error with 
RIC (By PPC 
communication 
standards)
An error in the 
communication line test 
after turning on the power 
or canceling the 
simulation 

Section

Controller

Operation 
mode
Note 

Case 1

Trouble 
position/
Cause

Improper connection or 
disconnection of the 
connector and the 
harness
RIC control PWB trouble
Control PWB (MFP 
control) trouble
Malfunction caused by 
noises

Remedy

Canceled by turning ON/
OFF the power.
Check the connector and 
the harness in the 
communication line.

Note