Kyocera 6052ci Black copies are Blank

[bryant28282000]

I am working on a Kyocera 6052with blank black copies. The customer was complaining of half of the paper was blank and the other half with text. I notice that the grey plung in the front of the developer would not go back in. I order another developer and the plunger goes back in the front of the developer but all the black copies are still blank. I have done calibration as describe on installation sheet. What could this be? Its not the drum, I installed a new black developer, I made sure the developer pins in the front were not bent, All the contact and springs in the back of the developer are there when compared to other colors

[darry1322]

Does the developer have a shipping sheet installed against the mag roller?

I haven't installed a new developer in this series yet but the previous machines included a shipping sheet that would cause blank copies if it wasn't removed during installation.

[sparkycivic]

check black developer for malfunctioning "button" that engages the roller to the drum. it should click in and stay, and release with the pinch handle. otherwise, replace.