AR-M550 (serv.man16). (9) Self diag message and troubleshooting - Sharp Copying Equipment Service Manual (repair manual). Page 11

AR-M550/M620  SELF DIAG MESSAGE AND TROUBLESHOOTING  9 - 11

Main 
code

Sub 

code

Title

Phenomenon

Display

Lamp
Message

Details

HDD trouble
Data abnormality in the 
HDD file management 
area (cluster chain 
corrupted)
The HDD sends an error 
response or does not 
respond for 30 sec.

Section

Controller

Operation 
mode

Note 

Case 1

Trouble 
position/
Cause

The HDD is not installed 
properly to the MFP 
control PWB.

Remedy

Check installation of the 
HDD to the MFP control 
PWB.

Note 

Case 2

Trouble 
position/
Cause

The HDD of the MFP 
control PWB does not 
operate properly.

Remedy

Check connection of the 
harness to the HDD of 
the MFP control PWB.
Use SIM 62-2, -3 to 
check read/write of the 
HDD.
Replace the HDD.

Note 

Case 3

Trouble 
position/
Cause

MFP control ASIC PWB 
abnormality

Remedy

Replace the MFP control 
PWB.

Note 

Main 
code

Sub 

code

Title

Phenomenon

Display

Lamp
Message

Details

Decode error trouble
A decode error occurs in 
making an image.

Section

Controller

Operation 
mode

Note 

Case 1

Trouble 
position/
Cause

Garbled data in input 
from PCI to PM
DM trouble
Data are garbled in image 
compression/transfer.

Remedy

Check installation of the 
PWB. (PCI bus)
If the job at occurrence is 
FAX, check installation of 
the FAX PWB.
For the other cases, 
check the MFP control 
PWB.

Note 

Case 2

Trouble 
position/
Cause

MFP control ASIC PWB 
abnormality

Remedy

Replace the MFP control 
PWB.

Main 
code

Sub 

code

Title

Phenomenon

Display

Lamp

Message

Details

Shading trouble (Black 
correction)
CCD black scan level 
abnormality when the 
copy lamp is turned off.
When the proper offset 
setup value is not 
obtained at turning on the 
power or CCD shading 
with SIM 63-2.

Section

Scanner

Operation 
mode

Note

Case 1

Trouble 
position/
Cause

Defective installation of 
the flat cable to the CCD 
unit

Remedy

Check installation of the 
flat cable to the CCD unit.

Note

Case 2

Trouble 
position/
Cause

CCD unit abnormality

Remedy

CCD unit check

Note

Case 3

Trouble 
position/
Cause

Scanner PWB 
abnormality

Remedy

Scanner PWB check

Note