Sharp UX-P115 Plain Paper Thermal transfer Fax "7140" Questions

philips magic 3 primo Hi I need the service codes to wipe the memory as it appears to have got stuck, a problem I have had before, can you help? Probably 7117 or 7140.

...do I clear the memory of old incoming faxes without wasting paper? call sharp tech support (905 568 7140) for instr. they are very helpful and will guide you thro' the deleting memory process in ...

...by OK). (This is on page 36 of the instruction manual, though not at all clear). I then typed 7140 & OK (which DIDNT work), followed by 7117 & OK (which DID work). The symbol showing I had ...