AR-M620 (serv.man20). (9) Self diag message and troubleshooting - Sharp Copying Equipment Service Manual (repair manual). Page 12

AR-M550/M620  SELF DIAG MESSAGE AND TROUBLESHOOTING  9 - 12

Main 
code

Sub 

code

Title

Phenomenon

Display

Lamp
Message

Details

Shading trouble (White 
correction all pixel 
adjustment)
The CCD white reference 
plate scan level 
abnormality when lighting 
the copy lamp
When the proper gain 
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

Mirror, lens, reference 
white plate dirt

Remedy

Clean the mirror, the lens, 
and the reference white 
plate.

Note 

Case 2

Trouble 
position/
Cause

Copy lamp  lighting 
abnormality

Remedy

Check the light quantity 
and lighting of the copy 
lamp. (SIM 5-3)

Note 

Case 3

Trouble 
position/
Cause

Defective installation of 
the flat cable to the CCD 
unit
Improper installation of 
the CCD unit
CCD unit abnormality

Remedy

CCD unit check

Note 

Case 4

Trouble 
position/
Cause

Scanner PWB 
abnormality

Remedy

Scanner PWB check

Note 

Main 
code

Sub 

code

Title

Phenomenon

Display

Lamp

Message

Details

Shading trouble (White 
correction center 
adjustment)
The CCD white reference 
plate scan level 
abnormality when lighting 
the copy lamp
When the proper gain 
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

Mirror, lens, reference 
white plate dirt

Remedy

Clean the mirror, the lens, 
and the reference white 
plate.

Note 

Case 2

Trouble 
position/
Cause

Copy lamp  lighting 
abnormality

Remedy

Check the light quantity 
and lighting of the copy 
lamp. (SIM 5-3)

Note 

Case 3

Trouble 
position/
Cause

Defective installation of 
the flat cable to the CCD 
unit
Improper installation of 
the CCD unit
CCD unit abnormality

Remedy

CCD unit check

Note 

Case 4

Trouble 
position/
Cause

Scanner PWB 
abnormality

Remedy

Scanner PWB check

Note 

Main 
code

Sub 

code

Title

Phenomenon

Display

Lamp

Message

Details

CCD communication 
trouble
Communication trouble 
between the scanner 
PWB and the CCD-ASIC. 
(Clock synchronization)
When an error occurs in 
the access check to the 
CCD-ASIC executed at 
turning on the power.

Section

Scanner

Operation 
mode

Note 

Case 1

Trouble 
position/
Cause

Defective installation of 
the harness connected to 
the CCD unit

Remedy

Check the harness 
connected 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 

Main 
code

Sub 

code

Title