This is the contact information I have. If you call the sales number they should be able to direct you to support.
Fuji Xerox (China) Limited
32F, Hongkong New World Tower,
300 Huaihai Zhong Road,
Shanghai, PRC 200021
Sounds like you have tried everything already, so it would be a hardware escalation: 1-800-821-2797 or 1-800-835-6100
I tried cleaning the encoder, transfer belt, transfer belt drive motor, transfer roller, transfer belt cleaning component, fusing component, etc., but to no avail
This is not the problem of double-sided alignment of the paper, but inaccurate color registration. After the paper alignment calibration, this problem still exists. like this
Thank you for using the Support Forum. Please take a look at the article for the auto alignment procedure to see if that will help. Please consider contacting your support centre for further assistance.
On my 2100 printer, I can print A3 files, only the first two are ok, and the next ones are all wrong color matching