Mitsubishi HS-U577 Owner's Manual page 38

Timer Recording
TIMER RESET
You can use TIMER RESET on the rear panel to erase both
the clock and all timer recordings.
To use TIMER RESET, press it with a pencil or a ball point
pen. The power will turn off and the clock will be cleared. All
timer recordings are erased.
If you have set the Clock set setting of the Set the clock menu
to AUTO, the auto clock function will automatically set the
clock again.
Additionally, TIMER RESET will reset the on-screen language
you selected. The next time you set the menus, you will have
to select the on-screen language.
Memory backup
If the VCR is without power for 30 minutes or less, it will retain
the clock and the programmed settings. The VCR must have
been plugged in for at least an hour beforehand to charge this
backup. If the power is lost for more than 30 minutes, the time
and the programmed settings will be lost.
If you have set the Clock set setting of the Set the clock menu
to AUTO, the auto clock function will automatically set the
clock again when power is restored.
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VCR Rear Panel
TIMER
RESET
TIMER
RESET