Kyocera Taskalfa C2552

[charge leak]

Hi all, has anyone discovered what is causing the black developer units on the Kyocera Taskalfa 2552, scoring the black drum units, we have had to replace quite a few developer units, and drum units, and I'd love to know what is causing this problem.

[charge leak]

Hi all, has anyone discovered what is causing the black developer units on the Kyocera Taskalfa 2552, scoring the black drum units, we have had to replace quite a few developer units, and drum units, and I'd love to know what is causing this problem.

RTFM. Sorry ,I didn't see the service bulletin re the modified developer units.