New 3050 doesn't work after installation. In the warming up shows "unknown toner" then writes "ready to copy", when start key is pressed paper is picked up and then stops near registration and code 7910 is shown. changing toner, developer unit didn't help. changing firmware to the 2.40 and down to 2.05 (between them kyocera changed some data about "unknown toner") didn't give any result.
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Have you ran simulation 130? -
Developing unit EEPROM errorReading from or writing to EEPROMReplace the developing unit.
cannot be performed.
Poor contact in the
connector terminals.
Check the connection of connector on the
engine PWB and the continuity across the
connector terminals. Repair or replace if
necessary.
Defective developing
unit.
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Problem is solved. answer is chinese assembly! kyocera assembly becomes so bad as Xerox assembly (((((Comment
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Watch Developing units. The plugs on the rear look warped and do not plug in well. I have had this too.Comment
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Not easy to edit a post.... I notice this more on drum units than on dev units...Comment
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