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Di850
Solution ID
Dirty image - Spots, banding, streaks, smudged or background
TAUS0620130EN*
Solution Usage
24
Description
Gray bands or blur lines from front-to-rear on the trail edge of 11x17 prints/copies.
Solution
PROBABLE CAUSES:
1. Worn fixing unit lower roller bearings or flat spots on the lower roller is allowing the lower roller to bounce which causes bands during image transfer.
Replace the lower fixing roller and bearings (p/n 55VA-5281).
2. Burrs on fixing drive gear/E (p/n 55VA-1670) causing inconsistent fixing unit rotation.
Replace fixing drive gear/E.
3. Worn developing unit.
Replace developer, and developing unit (p/n 55VA-3000).
4. The cleaner shaft holders (bearings) for the toner guide brush are seized resulting in improper brush rotation and a loss of ground to the brush.
Replace the shaft holders front and rear (p/n 55VA75020) and ensure there is a clean path to ground.
5. Binding bushings in the resist (registration) unit or flat spots on the resist unit rollers causing transfer blur due to improper paper speed.
Remove and clean all resist unit bushings and replace worn parts as needed.
6. Worn components or a build up of foreign material in the main drive or drum drive units. Clean or replace affected parts.
7. The 36 mode timing adjustments incorrect.
Refer to 7075/FORCE 75/7085 Technical Bulletin #15 for the troubleshooting procedures to determine the cause of the blur lines.
Notes :
a.If after all of the above recommendations have been done, and the problem remains unresolved, please contact the hotline for further assistance. Sample
prints and Management lists may be requested.
b. To view a PDF, Adobe Reader® must be installed. Adobe Reader® can be downloaded for free from the Adobe® web site at:
http://www.adobe.com/products/acrobat/readstep2.html .
Solution ID
TAUS0618404EN*
Solution Usage
7
Description
Dark band from front-to-rear, normally on the first print of a run.
Solution
CAUSE: The cleaner shaft holders (bearings) for the toner guide brush are seized resulting in improper brush rotation and a loss of ground to the brush.
SOLUTION: Replace the shaft holders front and rear (p/n 55VA 7502 0) and ensure there is a clean path to ground.
SPECIAL NOTE : Solution contribution by Chuck Tripp, Production Print/SSD
Copyright 2009, Konica Minolta Business Solutions U.S.A., Inc.
June 2009
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