Registration problem

[Laka]

Hello!
We have a Canon ImagePress C6000 VP that has registration problems after we changed an M image drum.
ITB looks good and we haven't had any problems before with the registration.
Anyone have any idea what it might be?
Regards
LAKA

[20 year tech]

In service mode run Copier>Function>Misc-P>AT-IMG-X this runs a series of image position correction adjustments

[Laka]

Hello!
We have tried this and the result is a "NG" message.
This could indicate that ITB is bad, but we are pretty sure that is not the case!

[Laka]

HI
It seems that the registration is skewed on paper (see picture)
It is ok on one side.
How to adjust it?

Regards
LAKA
2020-05-06 11.05.28.jpg

[20 year tech]

Hate to say this but it is likely your ITB. had an c8000 do this with yellow being the problem color, the belt only had 200 k on it but had weird wear patterns where the patch sensors were reading the patches.

[Laka]

Hi!
Now I have tried an old ITB that we changed a year ago (it worked then, but has small white dots).
Exactly the same problem with registration with this ITB! ( see attached picture)
Must be something else !?
Regards
LAKA
2020-05-07 15.35.50-1.jpg

[20 year tech]

you said this all started when you changed the magenta drum, I am guessing you have double checked your work (self inflected wounds are the worst) have you tried swapping laser units ?

[Laka]

Hey ! well, it may well happen that someone does wrong ... sometime.
I'll double check on this after the weekend again ...
Regards
LAKA

[Canuck]

It's also light on the one side...did you do itb-init? Patch reader clean? External secondary roll ok?I've had bad lasers do this on irac 5000s, 5200s,etc. Pop the old drum back in for starters...

[Phil B.]

(self inflected wounds are the worst)

yeah they are... I used to call them T.I.P.s .... Technician Induced Problems