Mcintosh Volume control acting erratic


Does anyone know what could be causing the volume control on a Mcintosh cp2200 to randomly change and sometimes freeze? I've tried covering the sensor for the remote thinking that their could be an interference, but it still does it. Just curious if anyone has experienced this with digital volume controls before.
fruff1976
As an Authorized McIntosh repair center, we have had more than 2 Optical Encoders fail (one in an MX-132 and another in a C2200 I seem to recall) and they reflect your exact symptoms when failing. Take her in for service and McIntosh will take care of you.
My problems is not only does it get stuck, but it changes on it's own. I have a computer modem within 3 feet and am wondering if that could cause it.
I don't think the modem is the culprit here. Mcintech has the best advice.