Different manufacturers' sustain pedals are wired differently. If the SH-201 always sustains, but the sustain *stops* when you step on the pedal, the pedal's polarity is opposite that of Roland pedals. This is fine, as the SH-201 can be switched to match.
TO SELECT REVERSE POLARITY:
While holding CANCEL, press USER.
TO SELECT STANDARD (NORMAL) POLARITY:
While holding CANCEL, press PRESET.
TO SELECT REVERSE POLARITY:
While holding CANCEL, press USER.
TO SELECT STANDARD (NORMAL) POLARITY:
While holding CANCEL, press PRESET.