Has anyone seen a rash of C255x codes on these models? We have replaced PCU, Developer, expansion board, toner hopper and toner drive assemblies. We can manually tone up the developer and watch the values go to specification. However the codes keep returning. We are working with Konica as we have several i series machines doing this. More times than not it is the black unit throwing the code but we have seen magenta and yellow do same. Some are using the alternate toner (AK) that Konica is sending and some are using OEM toner so we kind of ruled that out. I am wondering if the chip shortage forced some manufacturers to go else where and perhaps we have some bad chips on boards.... any insight would be appreciated.
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