How do i set the time on a unwell tx870

Put the S key in. and turn it all the way right.
You need to login using engineers code. You need the engineers code or I think you can just login as a clerk and set the time.

Turn key to SP
then engineers code
clerk ID
program Functions
190
date & time
time
enter time
key in time
enter
clear
clerk ID
thank but got instructions from till help line