GS-10: Initializing (Restoring the Factory Settings)
The following procedure can be used to clear the internal memory and reload the factory settings:
CAUTION: All USER information will be lost. Be sure to back up any information you wish to keep.
1) Turn off the power.
2) While holding down the CHANNEL SELECT A and B buttons, (in the PREAMP/SPEAKER section) turn on the power.
3) Press WRITE.