how to change date Tec MA 1350?

Page 98 of this manual:
http://callcds.com/pdf/TEC/MA-1350%20Owners%20Manual.pdf

At any time outside a sale and with the right key (Manager's?) in the correct position:

Press 6
Press (a)/FOR (you actually need the email AT symbol. Check in the manual)
Press 2 digits for the month (01 to 12)
Press 2 digits for the day (01 to 31)
Press 4 digits for the yedar(1991 etc)
Press AT/TL and you get a receipt printed with date changed info.

Any other questions: RTFM

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March 2015