How do you turn off the auto shut off on the CANON MP25DV

the printer mechsnism is defective, better get a new machine

Hello , Please check below manual for more details. https://www.usa.canon.com/internet/portal/us/home/support/details/calculators/printing-calculators/mp25dv?tab=manuals
Thanks.

it goes to stan by mode just go to settings and change standby move to longer or shut it off

Check the connections, battery, photo cell, etc.
Is cheaper to replace those than tinker with repairs.

There is a setting for darkness. Check it out in the manual or directions.

Top right column on page 3: http://www.manualslib.com/manual/355936/Canon-Mp25dv.html

How to Set the Time & Date for a MP25DV Canon Calendar & Clock Printing Calculator

The steps listed in the Calculator Instruction Manual for the Canon MP25DV Calculator did not work.
The correct steps for setting the time and date on this calculator are listed below:

1. Press the time/calendar button one to select the date mode. The display should show the month-day-year.
2. Hold down the = button until the month start flashing.
3. Use the number keys to enter the current date, month and year. Example 07-22-2021
4. Press the = key to set the current date.
5. Press the CE/C key to return back to the calculator mode.
6. Press the time/calendar button twice to select the time mode. The display show the
hour-minute-seconds & time of day. Example 02-01-14 A
7. Hold down the = button until the hour start flashing.
8. Use the number keys to enter the current time.
9. Press the X button for (A) a.m. or (P) for p.m.
10. Press the = key to set the current time.
11. Press the CE/C key to return back to the calculator mode.
12. To check the current date and time on your calculator, press the calendar/time button once
for date and twice for time.

remove the printer cover, insert one spool on the left side pin, guide the ribbon though printer and inset other spool on right pin. make sure the ribbon looks like a C with the ribbon coming around the outside of each spool.

The trick is to hold down the time set button (=) until the time flashes and once the new info is entered, press time set and it will stay.  same with the date.  You kinda need to play around with it.  Thats how i learned.