The contents of BOOKKEEPING can be cleared. When clearing the BOOKKEEPING contents, bring the arrow to "YES (CLEAR)" by using the Service button, and press the Test button. When clearing is finished, "COMPLETED" will be displayed and then the menu mode returns. Bring the arrow to "NO (CANCEL)" and press the Test button to have the Menu mode return on the screen without clearing the data. Note that this operation does not affect the contents of the game setting.