PDA

View Full Version : c451 intermitent bad copies


Custom Search


mrushing
07-22-2009, 10:20 PM
having problems with this machine I am getting some weird shadows on copies but it comes and goes, unit has new image units and new oem toner, unit has about 384,000 copies on it.. can email a sample tried uploading but it kept saying upload failed

jeroen2005
07-23-2009, 10:43 AM
Replace the Image tranfer belt unit .What is the life span on the ITB?

minimerlin
07-23-2009, 08:43 PM
having problems with this machine I am getting some weird shadows on copies but it comes and goes, unit has new image units and new oem toner, unit has about 384,000 copies on it.. can email a sample tried uploading but it kept saying upload failed
Is it like a halo effect or just offsetting? There is a modification to get rid of this problem..you need to fit a mylar film onto the 2nd image transfer plate.( the silver plate next too the transfer roller) The details are in a mod instruction...can`t lay my hands to it at present though.

lucky13
07-23-2009, 09:16 PM
are the shadows large black patches? or are they small shadows at the end of words or graphics .

mrushing
07-23-2009, 10:09 PM
Send me your email and i can send you a pdf of the problem abcrushing@consolidated.net

mrwho
07-12-2010, 06:19 PM
are the shadows large black patches? or are they small shadows at the end of words or graphics .

Sorry for digging up this old thread, but I'm having now this problem - shadows at the end of words. I'm about to order a new IU, but if there's any info I should know, please tell me.

Cheers!

tech51
07-12-2010, 07:42 PM
If its a sort of drop shadow effect I would replace the transfer roller, have seen this on both c451 and c550 models...

minimerlin
07-12-2010, 09:06 PM
Sorry for digging up this old thread, but I'm having now this problem - shadows at the end of words. I'm about to order a new IU, but if there's any info I should know, please tell me.

Cheers!Mrwho, you do not need to fit an IU, the problem is caused by the metal plate next to the transfer roller, there is a mylar mod to fit over this part. A00H703401 Guide Sheet. I normally fit a new transfer roller at the same time. The guide sheet is the fix, I did one just the other week, machine (c550 ) has never done it before and then suddenly at 995K...it started. I now fit this guide sheet to all the c451,550,650 as a pre-emptive strike!!

mrwho
07-13-2010, 11:42 AM
Thank you both for your replies - ordered the part as we speak. Will keep you posted!

Custom Search