How to Fix C7901 Error in Kyocera TASKalfa / UTAX / Triumph-Adler Printers
If you're experiencing an error message like "Error C7901 -- taskalfa/utax/ta triumph-adler printers" then you may need to fix it. In this video, we'll show you how to fix the error and get your printers back up and running.
Error C7901- Poor contact in the connector terminals. Check the connection of connector YC18 on the engine PWB and the continuity across the connector terminals. Repair or replace if necessary. Defective drum PWB BK. Replace the drum unit BK.