I kept working on the issue and realized the following: taking cartridges and drums out of the 4690MF I realized that the contacts to the yellow cartridge are damaged (bent), see here:
4690MF ibf Ausschnitt.JPG
I also have a used Bizhub C20 for spare parts, and there the contacts look perfect:
bizhub C20 ebay Ausschnitt.JPG
So can anybody givr me a hint if and how I can manage to bent the contacts back so that they will work again?
How can I remove/disassemble the part with the contacts, so I can work on them? Right now there is only a small gap that I can look into the printer and maybe stick a finger in - but nothing to work on it. Are there drawings that show how to dismantle the 4690MF, so I get a clue ?
Regards, jof
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