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

Main 

code

Sub

code

Title

Phenomena Display

Lamp
Message

Detail

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

Section

Large capacity tray control PWB / PCU MAIN 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 large capacity tray (LCC)
control PWB

Remedy

(Check) Check connection of the signal line between the PCU MAIN PWB and the large capacity tray
(LCC) control PWB. 
(Repair) Repair or replace the cable and the connector between the PCU MAIN PWB and the large
capacity tray (LCC) 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

Large capacity tray (LCC) control PWB trouble

Remedy

(Check)
(Repair) Large capacity tray (LCC) control PWB replacement / Power Source-ON
(After-work)

Note

Case 4

Trouble
position/cause

Discrepancy of the model code (The AR-LC2, instead of the AR-LC2N, is erroneously installed to the
AR-C160/C270.). 

Remedy

(Check) Check that the AR-LC2N or the AR-LC2 is installed.
(Repair) Install the AR-LC2N or remodel the AR-LC2 into the AR-LC2N. (Replace the AR-LC2 ROM
with the AR-LC2N ROM, and replace the 1A fuse on the ADU control PWB with the 1.25A fuse.)
(After-work)

Note

10 –  10A