Phaser 7700 print problem (faded gray streeks)

[twacaptainken]

I am having a problem with my phaser 7700 printer. It only seems to occur on about the 8th to 10 page and get worse the more pages that are printed. The first 6 or 7 pages are usually fine. I get horz. streeks, that vary from about and inch wide to maybe 2 1/2 inches, measure from top to bottom of page. The text in the gray area is very faded and gets more and more difficult to read the more pages that are printes. It happens with both a color or all black and white project. I have replaced the fuser several times, all print cartridges, the black toners. The belt cleaner assem. and the transfer rollers. I talked with Xerox thinking this might be a fuser overheat problem becasue before this problem started happening I had another problem. I notice a back rubber tar like streak that was happening everytime I printed something. Took me a while to figure it out, but on the top left hand door the black rollers that are just outboard of the transfer rollers. Not sure what you call them but the roller that are the most outboard with the top left door opened. Anyhow they were almost completely melted off, some roller were completely gone. I replaced the entire top left door with a new part from Xerox using the service manual. I talked to a place that reconditions Phaser 7700 printes and they thought this could be a power supply problem and and developer drum problem. What do you think, I hate to keep replace parts in the hopes that it will fix the problem. How can I check or reset the temperure of the fuser? The roller that melted where the ones that sit up against the fuser. Anyone have any ideas?

 

[CULTOFLON]

1. Print the Repeating Defects pages. From the front panel’s Printable Pages
Menu, select Service Pages, then select Print Repeating Defects Pages.
2. Swap the Print Cartridges. If the defect still appears in the same color, the
problem is the developer. If the banding traveled, it is the print cartridge. All
colors is a problem with the Accumulator Belt.
3. Replace the Accumulator Belt Assembly (RRP 35, on page 7-180).
4. If the banding frequency is high (.5 mm), replace the Laser Unit (RRP 38,

 

[twacaptainken]

I just got finished changing out the black developer. Still having gray banding. I tried swapping the print cartridges around like you said and the problem pretty much went away. I am gussing it was a bad black print cartridge all along. One more question after I did changed the black developer, I am not getting a clicking noise when the printer is printing. When I do a remove print smears from the improve print quality there are no click. When I do the Print color test pages or actually print anything I get a a series of three or four loud clicks about twice during every page of printing. Any ideas what that might be?

Thanks
Ken