KIP 9000 Service Manual page 520

7. 3. 2. 8 White lines (from LE to TE)
Cause Order
Image Corona
Dirt of LED Head
Transfer/Separation
Corona
Entrance of Fuser Unit
Drum
LED Head
7. 3. 2. 9 Image void
Cause Order
Printing media
Developer Unit
Drum
NOTE
The Drum needs to be wiped by correct way for avoiding its damage. See NOTE on former
page.
Checking matter
1 Is any foreign substance like
filament jointing the Grid Plate to
Drum?
2 Is the LED Head dirty?
3 Is the Transfer/Separation Corona
dirty?
4 Is there any foreign substance
around the Fuser Entrance, which
may possibly scratch unfused
image side of printing media?
5 Is there any vertical scratch on
the Drum of which location is just
the same as the location of white
line on the print?
6 Can the issue be fixed by
replacing the LED Head?
Checking matter
1 Can the issue be fixed if a newly
unpacked media is used?
2 If the voids appear on the same
printed sheet repeatedly from LE
to TE having constant interval,
measure the interval between
voids. Is the interval about
173mm?
3 Do the voids randomly appear on
the same printed sheet?
4 If the voids appear on the same
printed sheet repeatedly from LE
to TE having constant interval,
measure the interval between
voids. Is the interval about
565mm?
7-33
Result Treatment
Yes Remove it.
Yes 1. Take cleaning for the LED Head
pressing [EXP CLEAN] Key.
2. Check if the Pad Ass'y 2 of LED
Head is dirty or its life is ended.
Yes Clean each Corona Wire and
Housing. Replace the Corona Wire if
too dirty.
Yes Remove it.
Yes Find the cause of scratch first then
replace the Drum. (Suspected
parts for scratch on Drum are
Stripper Finger, Corona, Transfer
Guide, and so on.)
Yes OK
Result Treatment
Yes Advise the user to keep the media
avoiding the humidity.
Yes Check the surface of Developer
Roller.
1. If dirty, clean it with the dry cloth.
2. In damaged, replace the
Developer Roller.
Yes Check the toner level in the
Developer Unit. If it is too small,
check the Toner Sensor.
Yes Check the surface of Drum.
1. In dirty, wipe off the dirt with a
dry cloth.
2. In damaged, Find the cause of
scratch first then replace the
Drum. (Suspected parts for
scratch on Drum are Stripper
Finger, Corona, Transfer Guide,
and so on.)
K115sm7e1.doc