Problem started happening only recently, in both printing and copying. I changed the corona wires, developer unit from another machine, no affect. Please look at the PDF and advice what might cause this. Not a fixing issue as it happens before that. Drum is relatively new (under 1mil). Thanks in advance.
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Re: iR8500 spots (toner drop?) on dark copies
It's look like corona make damage on the drum.If it ain't broke, don't fix it
A picture is worth a thousand words -
Re: iR8500 spots (toner drop?) on dark copies
spots.JPG
u have SPOTS all over the place ?/
where is the leading edge on this picture ?????
Clean or replace ALL OZONE filter periodically. Interest should be taken to clean fan duct of dirty filters.
Check to make sure that the Drum Cleaning Blade is a Canon Blade.
When replacing or rotating the Drum Cleaning Blade, the Lot Numbers on the Cleaning Blade must face out--
bld.JPG
bld2.JPG
Try and Disconnect J733 on the HVT-DC1 PCB located in the rear upper left corner of the machine. This will eliminate the fixing bias and the transfer guide bias. If the spots are still present replace the Transfer / Separation Corona Assembly.
**Knowledge is time consuming, exhausting and costly for a trained Tech.**
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Re: iR8500 spots (toner drop?) on dark copies
Leading edge is on left (long end), spotting starts after about 2 inches on the first page and is continuous on subsequent pages. Spotting is in strips to the middle of the page and then one half inch strip in the bottom of the page. I will open up and see if it is the drum blade.Comment
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