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i have a used sharp ER-A550. How do i erase it? And start over programming?

I need to erase the the content, reprogram it for my business. It is a old used Sharp ER-A550. I need the service manual or what?
ibou fall, March 2007
You need a service key to turn it to the 6:00 position. Hold down the journal feed key and turn to 7:00 position. This will set it back to factory keyboard and program defaults. You will need a programming manual to set all the items.

( Sharp Dealer )

Lloyd, April 2007
Most sharps are reset by Turning the key anti clockwise to 6 o'clock. Hold receipt and journal feeds then turn key to 7 o'clock. This I think will reset the machine but obviously will have absolutely no programming in it at all. You will need a manual to reprogram it.

Martin

Cornwall Scales + Equipment Ltd, April 2007
link Click here to see other fixes for Sharp.