Roland Boss ME-50 Service Notes page 18

Note: Release the pedal when the pedal is fully raised, then press the [WRITE]
switch.
If an error occurs, the green LED in the upper portion of the seven-segment
LED display flashes.
fig.test-33_70
• Press the unit's expression pedal completely forward, release the pedal,
and press the [WRITE] switch.
Note: Release the pedal when the pedal is pressed down completely, then
press the [WRITE] switch.
If an error occurs, the green LED in the upper portion of the seven-segment
LED display flashes.
fig.test-34_70
• Press the [ ] or [ ] switch to select "5," then press the [WRITE]
switch.
• If no problem exists, the procedure automatically proceeds to Factory
Reset.
Factory Reset
"F" appears in the seven-segment LED.
• Press the [WRITE] switch. The BANK LED flashes.
• Press the [WRITE] switch. The seven-segment LED and BANK LED flash,
and the factory data is loaded.
The dot in the seven-segment portion lights, and Factory Reset is completed
when the unit switches to Play mode.
Never turn off the power while factory data is being loaded.
When the above is completed, the unit quits Test mode.
ME-50
19