K117sm7e2
7-37
7. 3. 2 Countermeasures – Scan Image Quality
7. 3. 2. 1 Completely black
Cause Checking
order
Checking Result Treatment
Calibration 1 Can you fix the problem if you make
Shading (Calibration)?
(Refer to [8.13.4.1 Shading].)
(Old Scanner)
(Refer to [8.14.6.1 Shading].)
(New Scanner)
Yes OK
Cable of CIS 2 Is the cable of each CIS connected
properly?
No Connect it properly, or
replace the cable if it is
broken.
LED of CIS 3 Is the LED of each CIS lighting? No 1. Check the DC Power
Supply (+24V) of the
printer part.
Replace it if broken.
2. Replace the CIS.
3. Replace the Data
Controller Board.
7. 3. 2. 2 Vertical black lines
Cause Checking
order
Checking Result Treatment
Scan Glass 1 Is there any dirt or damage on the Scan
Glass?
Yes Clean / replace it.
Calibration 2 Can you fix the problem if you make
Shading (Calibration)?
(Refer to [8.13.4.1 Shading].)
(Old Scanner)
(Refer to [8.14.6.1 Shading].)
(New Scanner)
Yes OK
Feeding rollers 3 Are feeding rollers dirty? Yes Clean them.
CIS 4 Can you fix the problem if you replace
the CIS?
Yes OK
7. 3. 2. 3 Vertical white lines
Cause Checking
order
Checking Result Treatment
Scan Glass 1 Is there any dirt or damage on the Scan
Glass?
Yes Clean / replace it.
Calibration 2 Can you fix the problem if you make
Shading (Calibration)?
(Refer to [8.13.4.1 Shading].)
(Old Scanner)
(Refer to [8.14.6.1 Shading].)
(New Scanner)
Yes OK
Feeding rollers 3 Are feeding rollers dirty? Yes Clean them.
CIS 4 Can you fix the problem if you replace
the CIS?
Yes OK