Yamaha Corporation of America.

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Digital Processors

Factory Reset Procedure for an SPX90/SPX90II

WARNING: When the Factory Reset procedure is performed ALL user-stored data will be DELETED. If the current settings are not expendable, create a backup before executing the Factory Reset.
  1. Make sure that the power is turned OFF.
  2. Press and hold the [BALANCE] and [FOOT TRIGGER] buttons simultaneously, then turn the power ON.