AR-M316 (serv.man10). ARM256 316 Service Manual - Sharp Copying Equipment Service Manual (repair manual). Page 111

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AR-M256/M257/M258/M316/M317/M318/5625/5631  TROUBLE CODE LIST 9 - 12
U9
81
Content
Operation control PWB communication 
trouble (Parity)
Details
Communication trouble between MCU and 
the operation control PWB (Parity error)
Cause
Operation control PWB connector 
disconnection.
Harness failure of the operation control 
PWB and the MCU PWB.
Check 
and 
remedy
Check the connectors and the harness of 
the operation control PWB and MCU PWB.
Check the grounding of the copier.
82
Content
Operation control PWB communication 
trouble (Overrun)
Details
Communication trouble between MCU and 
the operation control PWB (Overrun error)
Cause
Operation control PWB connector 
disconnection.
Harness failure of the operation control 
PWB and the MCU PWB.
Check 
and 
remedy
Check the connectors and the harness of 
the operation control PWB and MCU PWB.
Check the grounding of the copier.
84
Content
Operation control PWB communication 
trouble (Framing)
Details
Communication trouble between MCU and 
the operation control PWB (Framing error)
Cause
Operation control PWB connector 
disconnection.
Harness failure of the operation control 
PWB and the MCU PWB.
Check 
and 
remedy
Check the connectors and the harness of 
the operation control PWB and MCU PWB.
Check the grounding of the copier.
88
Content
Operation control PWB communication 
trouble (Time-out)
Details
Communication trouble between MCU and 
the operation PWB (Time-out error)
Cause
Operation control PWB connector 
disconnection.
Harness failure of the operation control 
PWB and the MCU PWB.
Check 
and 
remedy
Check the connectors and the harness of 
the operation control PWB and MCU PWB.
Check the grounding of the copier.
99
Content
Operation panel destination error
Details
An error occurred in checking the 
destination of the operation panel and the 
main body.
Cause
Erroneous connection the operation panel 
unit.
SIM setup error.
Check 
and 
remedy
Check the destination information of the 
operation panel unit and the MCU. (Use 
SIM 26-6 for the destination of the body.)
Trouble 
code
Details of trouble
Main 
code
Sub 
code
EE
EL
Content
Developer adjustment trouble (Over-toned 
abnormality)
Details
An abnormality occurred in execution of 
automatic developer adjustment.
Sample data was detected over-toner.
Cause
Toner concentration sensor abnormality.
Toner concentration trouble.
Developing unit trouble.
MCU PWB failure.
Check 
and 
remedy
Use SIM 25-2 to perform the auto 
developer adjustment.
EU
Content
Developer adjustment trouble (Under-
toned abnormality)
Details
An abnormality occurred in execution of 
automatic developer adjustment.
Sample data was detected under-toner.
Cause
Toner concentration sensor abnormality.
Toner concentration trouble.
Developing unit trouble.
MCU PWB failure.
Check 
and 
remedy
Use SIM 25-2 to perform the auto 
developer adjustment.
PF
00
Content
PF trouble
Details
The copy inhibit command from RIC is 
received.
Cause
Judged by the host.
Check 
and 
remedy
Inform to the host.
Trouble 
code
Details of trouble
Main 
code
Sub 
code
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