I have an MX-4070N, been in the field almost 3 years. Copying or printing plain paper out of trays 1-4 (DE28 btw) picks up paper, and doesn't feed another sheet until the first copy/print is out of the finisher. It has an LCC tray, plain paper feeds normally out of the LCC, and the bypass tray. We have done the usual - Updated firmware,emergency firmware, DE28 PWB, replaced PCU, msata, HDD, MFP/SCN PWB, reset all settings back to factory, even went as far as copying a 4070N in 56-2 and putting that information into the copier ... Still has slow feeding out of the trays. Sharp is clueless on this one too. Anybody have any ideas?
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