Chosen Solution
Grace Mondo internet radio has developed intermittent function in the top volume control knob. I am guessing the shaft encoder has failed. Twisting the knob will randomly raise and lower the volume, regardless of direction of rotation. I find that the remote control iPhone application can still change volume, so the radio is functional, but I would like to recover use of the local volume control
Hi, I don’t know your radio so I don’t know if the volume control would be a rotary encoder type (usually identified by just a number stamped on it) or a potentiometer, usually identified by a number with either a k or k Ohms after the number denoting x thousands of Ohms resistance stamped on it). If it is a rotary encoder try cleaning it and see if that resolves the problem. Here is a link to a video that shows in principle, what to do. Here is a link to the ifixit Grace Digital Mondo Repair guide which may be of some help to gain access to the encoder. If it is a faulty potentiometer (or even an encoder that has failed mechanically) hopefully there will be information stamped on the case of the component which will help if you have to order a replacement part, as I cannot find a service manual for the radio online from which to get the part information. Hopefully this is of some help.
The shaft is a little longer than original, but not a problem. It fixed mine once I got it apart. (The hard part) https://www.ebay.com/itm/2PCS-Rotary-enc…
