KIP 9000 Service Manual page 524

7. 3. 2.14 Unsharpened image (Focus defect)
Cause Order
Dirt of LED Head
Installation of LED
Head
Transfer/Separation
Corona
7. 3. 2.15 Uneven density between front and rear
Cause Order
Dirt of Image Corona
Transfer / Separation
Corona
LED Head
Checking matter
1 Is the LED Head dirty?
2 Is a correct gap (focus distance)
kept between LED Head and
Drum? (The gap will not be proper
if the Positioning Bars of LED
Head are bent.)
3 Is the Transfer/Separation Corona
dirty?
Checking matter
1 Is the Image Corona dirty?
2 Is the Transfer / Separation
Corona dirty?
3 Is the LED Head firmly fixed with
the screws?
4 If the uneven density appear on
the same printed sheet repeatedly
from LE to TE having constant
interval, measure the interval
between voids. Is the interval
about 8mm?
7-37
Result Treatment
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.
No Adjust the gap properly.
Yes Clean each Corona Wire and
Housing. Replace the Corona Wire if
too dirty.
Result Treatment
Yes Clean each Corona Wire, Housing
and Grid Plate. Replace each
Corona Wire and Grid Plate if too
dirty.
Yes Clean each Corona Wire and
Housing. Replace the Corona Wire if
too dirty.
No Fix the LED Head firmly.
Yes Replace the LED Head.
K115sm7e1.doc