AR-C270 (serv.man14). (Section 10) Self Diag Message Troubleshooting - Sharp Copying Equipment Service Manual (repair manual). Page 9

Main 

code

Sub

code

Title

Phenomena Display

Lamp
Message

Detail

The motor lock signal is detected for 3.5sec or more when the developing motor is ON. 

Section

Developing drive

Operation mode

Warm-up / Copy / Print

Note

Case 1

Trouble
position/cause

Developing motor trouble

Remedy

(Check) Check the developing motor operation (SIM 25-1). 
(Repair) Replace the developing motor. / Power Source-ON
(After-work)

Note

Case 2

Trouble
position/cause

Developing mechanism section trouble

Remedy

(Check) Check the loads of the developing mechanism section.
(Repair) Repair or replace the parts in the developing mechanism section. / Power Source-ON
(After-work)

Note

Case 3

Trouble
position/cause

PCU MAIN PWB trouble  

Remedy

(Check)
(Repair) Replace the PCU MAIN PWB. / Power Source-ON
(After-work) Re-enter setup values and adjustment values. (Install the EEPROM of the defective PCU
MAIN PWB to a new PCU MAIN PWB.)

Note

Case 4

Trouble
position/cause

Developing motor power line trouble

Remedy

(Check) Check the fuse (F707).
(Repair) Replace the fuse (F707). / Power Source-ON
(After-work)

Note

Main 

code

Sub

code

Title

Phenomena Display

Lamp
Message

Detail

Communication test error in warm-up / Discrepancy of the model

Section

PCU PWB / Duplex control PWB

Operation mode

Warm-up / Initialize

Note

Case 1

Trouble
position/cause

Bad connection of the signal line between the PCU MAIN PWB and the ADU control PWB.

Remedy

(Check) Check connection of the signal line between the PCU MAIN PWB and the ADU control PWB. 
(Repair) Repair or replace the cable and the connector between the PCU MAIN PWB and the ADU
control PWB. / Power Source-ON
(After-work)

Note

Case 2

Trouble
position/cause

PCU MAIN PWB trouble  

Remedy

(Check)
(Repair) Replace the PCU MAIN PWB. / Power Source-ON
(After-work) Re-enter setup values and adjustment values. (Install the EEPROM of the defective PCU
MAIN PWB to a new PCU MAIN PWB.)

Note

Case 3

Trouble
position/cause

ADU control PWB trouble

Remedy

(Check)
(Repair) ADU control PWB replacement / Power Source-ON
(After-work)

Note

Case 4

Trouble
position/cause

Discrepancy of the model code (The AR-DU2, instead of the AR-DU2N, is erroneously installed to the
AR-C160/C270.). 

Remedy

(Check) Check that the AR-DU2N or the AR-DU2 is installed.
(Repair) Install the AR-DU2N or remodel the AR-DU2 into the AR-DU2N. (Replace the AR-DU2 ROM
with the AR-DU2N ROM, and replace the 1A fuse on the ADU control PWB with the 1.25A fuse.)
(After-work)

Note

10 –  9A