... panel is numbered and marked below the button ) 1.Original password:Press1, 2 , 3, 4 sequentially.2.Work record (record number ... arbitrary key and enter to normal work..3 Revise the password:Firstly, turn off the power, press 3 , 4 , 5 simultaneous ... input four new passwords, confirm the four new password again. Then new password is effect.4 Delete the number of timesFirstly turn ...