Canon C165: dirty strikes on the back of 1st page

[ondemandprint]

Hello.

There is a problem with dirty strikes. On the every printjob 1st page back side only. About 3-4 very thin intermittent lines along paper path.
There are no or minimal strikes on other pages both simplex and duplex till end of printjob.

Is it something wrong with fuser?

[copier tech]

Re: Canon C165: dirty strikes on the back of 1st page

Hello.

There is a problem with dirty strikes. On the every printjob 1st page back side only. About 3-4 very thin intermittent lines along paper path.
There are no or minimal strikes on other pages both simplex and duplex till end of printjob.

Is it something wrong with fuser?

Usually a sign the black drum needs replacing. What is the life of K% drum ?

It would help if you can post a picture of the print defect here.

[ondemandprint]

Re: Canon C165: dirty strikes on the back of 1st page

Problem is solved fully.

There was Separation Plate (in the Fixing Film Unit) with debris of hardened toner on it.