Reset the drum and developer counters to zero, the replace the developer, and run the required TCR adjustment. Do NOT reset the counters then think you don't have to replace the drum and developer, because the copier uses the counters to determine voltages for certain parts inside the machine, reset counter and not replace the parts the copier thinks they are new when in fact they are old you get codes and bad copies.,
Btw, I’m available to help over the phone in case u need at
https://www.6ya.com/expert/normanj_7893313f0751935f
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