seniortech
12-11-2007, 04:45 PM
I have a Bizub C450 that is giving intermittant black marks on copies/prints. they are what I can only describe as large faint (1cm) irregular shaped spots appearing completely at random; they could appear anywhere on the print/copy, the spots are fused on the paper and do not flake away, it seems almost like background, the machine has only done 100K.
This very same fault appeared about two weeks ago but I was not involved; another collegue visited the machine, but the fault had disappered before he arrived.
I have removed all units, checked paper path/guides etc for toner contamination, I have tried various diagnostic tests and ran 600 prints/copies on various paper without problems; the fault then re-appeared for 50 or so copies then disappeared again. All test prints in diagnostics show ok.
I am going back tommorrow with another black I/U, transfer rollers/complete transfer unit for another crack at this one as the customer is now getting 'jumpy'.
Has anyone here had this sort of problem? I will try and get an example uploaded but won't be for a couple of days.
Thanks
This very same fault appeared about two weeks ago but I was not involved; another collegue visited the machine, but the fault had disappered before he arrived.
I have removed all units, checked paper path/guides etc for toner contamination, I have tried various diagnostic tests and ran 600 prints/copies on various paper without problems; the fault then re-appeared for 50 or so copies then disappeared again. All test prints in diagnostics show ok.
I am going back tommorrow with another black I/U, transfer rollers/complete transfer unit for another crack at this one as the customer is now getting 'jumpy'.
Has anyone here had this sort of problem? I will try and get an example uploaded but won't be for a couple of days.
Thanks