● Starting Self-Diagnostic Function in the protection cancel modeIf the protection function works and causes hindrance to troubleshooting, cancel the protection function by the procedurebelow, and it will be possible to enter the self-diagnostic function mode.(The protection functions other than the excess current detect function will be disabled.)While pressing the “TONE CONTROL” and “STRAIGHT” keys, press the “ ” (Power) key to turn on the power and keeppressing those 2 keys and the “ ” (Power) key for 3 seconds or longer.The self-diagnostic function mode is activated with the protection functions disabled.In this mode, the “SLEEP” segment of the FL display flashes to indicate that the mode is self-diagnostic function mode withthe protection functions disabled.● Starting Self-Diagnostic FunctionWhile pressing the “TONE CONTROL” and “STRAIGHT” keys, press the “ ” (Power) key to turn on the power.The self-diagnostic function mode is activated.● Canceling Self-Diagnostic Function1. Before canceling self-diagnostic function, execute setting for FACTORY PRESET of main menu No.24. (Memoryinitialization inhibited or Memory initialized).* In order to keep the user memory preserved, be sure to select PRESET INHIBITED (Memory initialization inhibited).2. Press the “ ” (Power) key to turn off the power.Keys of this unitCAUTION!Using this unit with the protection function disabled may cause further damage to this unit. Use special care for this pointwhen using this mode.While pressing these keys, turn on the power.(Power)26HTR-2064/NS-B20/NS-C20/NS-SWP20HTR-2064/NS-B20/NS-C20/NS-SWP20