KIP 700m - 7. 2. 2. 6 Foggy image or blurred black wide line (vertical); 7. 2. 2. 7 Clear black thin line (vertical)

K117sm7e2
7-22
7. 2. 2. 6 Foggy image or blurred black wide line (vertical)
Check the following matters with the Test Pattern No.1 S(0) and No.4 S(0).
If necessary use other Test Patterns.
Cause Checking
order
Checking Result Treatment
Light from the
outside
1 Is any light from the outside thrown onto
the Drum?
Yes Install the outer cover
correctly.
Image Corona 2 Is the Image Corona dirty? Yes Clean the Image Corona, or
replace the Corona Unit.
Developer Unit 3 Is the Developer Roller evenly covered
with the toner?
No Check if the Regulation
Roller is fixed at the proper
position.
If not, fix it at the correct
position.
7. 2. 2. 7 Clear black thin line (vertical)
Check the following matters with the Test Pattern No.1 S(0) and No.4 S(0).
If necessary use other Test Patterns.
Cause Checking
order
Checking Result Treatment
Image Corona 1 Is there something like filament on the
Grid Plate, which is contacted to the
Drum?
Yes Remove it.
Is the Image Corona dirty? Yes Clean the Image Corona, or
replace the Corona Unit.
Foreign substance 2 Is there some foreign substance on
each Corona Unit or LED Head, which
is contacted to the Drum?
Yes Remove it.
Photoconductive
Drum
3 Is there any black line or damage on
the Drum, of which position
corresponds with the black line on the
print?
Yes Clean the Photoconductive
Drum.
Replace the Process Unit if it
is damaged. Be sure to find
the cause of the damage.