Roland GR-20 Owner's Manual page 31

Chapter 6 Appendices
Restoring the Factory
Settings (Factory Reset)
If you want, you can get back all the settings and patches that
the GR-20 had when you first took it out of the box; this
process is called "Factory Reset."
You can restore the entire GR-20 to the factory-set state, or
restore an individual user patch to its factory-set state.
Calibration settings for the expression pedal (p. 31) will not
be returned to the factory-set condition. This means that even
if you execute Factory Reset, you don't need to calibrate the
expression pedal again.
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When you execute Factory Reset, all data you currently have
stored in the unit will be overwritten by the factory-default
data. If the GR-20 contains important data that you want to
keep, use Bulk Dump (p. 26) to save it on an external MIDI
device before you execute a Factory Reset.
T. Turn off the GR-20, and then hold down the [WRITE]
button while turning the power on again.
2. Usethe [NUMBER/VALUE] knob to select the range of
data that you want to restore to the factory settings.
: The entire GR-20 will be returned to the factory
settings.
: Only the specified patch will be returned to the factory
settings.
3. Press the [WRITE] button.
The decimal point in the display will blink, the Factory
Reset operation will be executed. Then you will return to
Play mode.
* Do not turn off the power while the decimal point is blinking.
Calibrating the Expression
Pedal
When the GR-20 is shipped from the factory, the expression
pedal is calibrated for optimum performance. However, with
extended use, or depending on the conditions of use, this
calibration may drift. If you experience problems, such as
being unable to use the volume pedal to silence the sound
entirely, or if the pitch does not rise or fall through the full
range specified, you can use the following procedure to re-
calibrate the expression pedal.
1. Turn off the power of the GR-20. Then hold down [EXP
PEDAL] while you turn the power on again.
The display will indicate "Pu."
2. Fully release the pedal (applying pressure at the heel),
and press the [WRITE] button.
The display will indicate "Pd."
3. Depress the pedal completely (applying pressure at the
toe), and press the [WRITE] button.
The setting will be stored, and you will return to Play
mode.
* The decimal point in the display will blink while the setting is
being stored. Don't turn off the power during this time.
* Ifyou turn off the power before returning to Play mode, the
setting you made will not be stored.
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