4Diagnostics(1) turn the mode lock key to “P” position, or assign to “P” mode(4---key).(2) Enter xxxxxxxxx(9digit) --- #/NS555555555-----#/NS automatic receipt issue at 3 minutes interval.555555551-----#/NS automatic receipt issue at 5 second interval without cutter.555555552-----#/NS automatic receipt issue at 5 seconds interval with cutter.666666666-----#/NS communication port loop back testcheck the com. Port from 1 to 4.Following result message is printedError2 RTS---CTS defectError4 RxD ---TxD defect777777777-----#/NS automatic printing testAll characters are printed on receipt and journal automatically.You can do a check of printing quality.It’s terminated by depressing “CL” key888888888-----#/NS key board testthe display will show the each key s position number on the right side 2 digitvarious signal status will be showed each digit on the display.It’s terminated by depressing “CASH” key.For example(display)P 1 0 1 0 1 1 4 5Key position codeJournal near end sensorReceipt near end sensorJournal paper emptyReceipt paper emptyHead up switchControl key position999999999-----#/NS version and check sum displayThe software version number and checksum of EP-ROM will displayed.For example(display)1 - 0 0 E F 1 0 3check sumdestination spec.Version number