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05-05-2009, 08:36 PM
got a c500 with sc 2701 please help

05-06-2009, 01:30 PM
F27-01 - Output of toner density sensor / Y (TDS Y) cannot be controlled.

Did you, by chance, fiddled with the developing units and forgot to connect that little connector on the side?
Or did you do the L detection adjustment without changing developer?

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