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Got it, the toner sensor that grips the tblack toner bottle wasn't making contact. Now the copier get to ready , but when press to make copy y stays in copying .
Hmmm... Does the K dev unit work to drive the transfer in this model?
How many pages are there on the K dev unit? Look at SP 7-803-006 to look at the PM counter for the unit. If it's past its yield, replace it and see if that does anything for you.
Also make sure the MUSIC firmware is up to date...
SC 552, put a new fuser and oil unit in the machine. Make sure to clear the PM counter with SP 5-999-009. Also, check all of your connections to the controller just as a precaution. It sounds like something a little flaky is happening to the poor machine.
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