Sir, It is the document feeder, the Di620 is a very old MINOLTA machine, but you mite find a (NOW) Konica Minolta dealership that can update the document feeder EPROM (Erasable Program able Read Only Memory) chip located on the document feeder control board. It has to have its program updated to correct this problem which gives this code. Let them know you have the Technical Bulletin # 2617b they will not be able to call it up but mite be able to contact some one at Konica Minolta tech support that can get access to very old MINOLTA technical bulletins. Additional info is Knowledge Base # TAUS0645133EN00. Then will have to hope that Konica Minolta has keep the Firmware for the chip????? Maybe in JAPAN!!!!!!!!!. YOUR ASKING ALOT TO GET THIS MACHINE TO RUN!!!!
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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