Service Mode

I am having serious registration problems with my iR3220. Can someone tell me how to get into Service Mode.

Thanks

 

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(Hit the * then hit and hold 2 and 8 for a few seconds then hit * again)

 

And check transfer belt if you have a spare to test with, blow any stray toner off back side of transfer belt (be careful not to touch print side) When the back side gets dirty it can slip causing registration problems. And when it gets old, ~500,000 letter, it can stretch.

 

PG5 test

thanks for the info. where can i purchase the transfer belt for the same copier also how do i perform a PG5 test and is it necessary?