To leave the settings mode simply turn the DIP switch #1 to off
(left) position. The machine should reset and be ready to go.
HOW TO RESET HIGH SCORES MANUALLY
If you feel the score on the game reached an unbeatable number you
can reset this score to the default value (see setting P30). Enter the
reset mode by powering up the machine and switching DIP switch
#4 to ON position.
You will not see any changes on the display and the game will
remain in playable mode. This is why it is important to remember to
switch the machine back from this mode when done resetting. Next,
press and hold the START BOXING button on the machine for
about 10 seconds. When the score resets on the main display then
release the START BOXING button and put DIP switch #4 back to
OFF position.