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zmeutz
02-19-2020, 02:17 AM
Hello,

Anyone had this problem?

When I start printer on “Now adjusting” (color registration) it end with C-4520.
If I try automatic color registration in service mode, it end with C-4501 .

First I have cleaned color reg. sensor, then I replaced.
I double checked yellow drum unit for foreign objects, also replace it.
I checked transfer belt unit, upper roll to see if it’s damaged, but seems to be ok.

I saw a little problem, when I try to set transfer belt speed, When I print test page, It came with magenta ok, straight line color but yellow on top at 1mm in left, and when it goes down, it came over magenta line.

44999

Thanks!
Stefan

zmeutz
02-19-2020, 07:46 PM
Solved

replaced writing unit yellow

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