Taskalfa 250Ci - Error Code C7420

[D Colour]

Hi all

We have a Kyocera Taskalfa 250Ci giving us error code C7420 (Transfer belt unit type mismatch problem - Absence of the transfer belt unit is detected.)

The error has appeared after removing the fuser unit to clear a jam, once the fuser was reset into the machine. The code appeared.

Ive searched the forum and there is a few threads regarding this error, but none have a definitive resolution.

Its definitely the correct belt in the machine, firmware is the latest (V15). We have tried another transfer belt in the machine and showed the same error - granted this was not a new transfer belt.

The pins are fine and the cable is connected ok.

We have lifted the machine to our workshop so we can have a go at any suggestions!

Thanks

James

[Kyo fan]

Triple check if there's a bent pin on the machine's body. That's the only reason I've seen this code on 250ci.

[tmaged]

IIRC, this error code will appear if the pins don't connect all the way. The connector that goes through the frame has pins in it that are not long enough. I did maintenance on a machine & got that after installing the new belt. I basically had to gut the machine to get to the connector. You might try pushing the pins in under the fuser, but I think I had to push them from the rear frame side to get it to work. A regular 1/2 hr maintenance turned into about 4 more hours.