Hi Hartley You answered a question to error 9-363 and said the following. Rotary dev fail. usualy caused by using black only for a long time. Most likly, it will need a clean out and replacement of the black developer and then replacement of the fuse on the driver board Why would you change the fuse on the driver board if the fuse is not blown? Is the fuse on the board that reads PWBA-DIST or PWBA-AC Drive 120V? Do you change all the fuse? Also, I read some people said I have to clean the rotary sensor. Do you have an idea where this is? Thank you! Keith

SOURCE: Error 9-363 Xerox code

Yes Its on the rotary pwb. Its behind the IOT pwb. Basically at the top left hand corner as you look at the rear of the machine. I think it is a 3 amp slow blow but cant quite remember. Definately slow blow though. Sometimes if you meter them they can read ok but as soon as a load is passed through them the fuse cant hold the charge and fails. It is the 2 fuses that are harder to get at, may as well change all 3 whilst your there. The rating for the fuse is written on them. Worst case is the developer motor has seized, taking it off an putting it back on again usually remedies this, but its a bit more awkward to get to. Fuses first

SOURCE: Error 9-363 Xerox

well I dont know how extensive you want to get but is what is happened is the Black developer housing has gotten to much toner in it and it is packed in there. The solution to the issue is to replace the developer material. with new. It may not be nessasary to replace the housing but that may also need to be replaced.

SOURCE: ricoh rex rotary sc 548

Hello wajidsn

SC548 : "Fusing Installation Error.Fusing Unit Set Error"