[Misc] iPRC1 Yellow Displacement

[pga]

Dear All,
Any ideas on yellow displacement after changed ITB belt? Before changed,the machine work fine. No yellow displacement at all. Due to belt surface got ach dots,i changed it and issue occur.
I got check the ITB screw and belt,all looks fine. I tried perform twice auto gradation but when i print PG Type 31,i can easily see the yellow displacement.
Pls advise on this matter...

[SCREWTAPE]

Take the ITB back out and inspect what was done. If it worked before then something happen.

Do you have a manual are you trained or have experience on this machine.