C353 impossible to perform a color registration adjustment.

[groovy]

Hi all,
Biz C353 under 120k, having an issue on color alignment.
Ref. service manual, p. 357, found an incorrect registration in sense of X axys on cyan, magenta and yellow.
With a setting of +4 cyan was aligned, but magenta and yellow set to +6 is again out.
Any help?
Luigi - digitalix.

[emujo]

Replace the IUs as a set. If you're a dealer, then you can get these IU FOC if you are getting a specific code. Emujo

[groovy]

All 3 color IU has the same price as i sell the whole machine to my customer....

[emujo]

Then maybe you need to up your prices, or get out of the refurb business. Emujo

[groovy]

Hi and thanks for your reply.
Looked better in the service manual: it could be the transfer belt before the iu...
A question, maybe is the black IU defective?
The copier was sent with a strange iu with missing labels... probably rechipped.
If so, there is a way to ensure the black iu is out of alignment?