To the OP, there was a Yamaha service bulletin which addressed your exact symptom and cause ie. sustained note due to moisture contamination on DM circuit board.
The remedy was to glue together the three parts of the breath sensor assembly, rather than merely use grease between them, when fastening them to the DM board.
I think this issue was identified late on, and the solution was applied to DM boards delivered as spare parts, rather than being applied to WX-7 production.
CB
The remedy was to glue together the three parts of the breath sensor assembly, rather than merely use grease between them, when fastening them to the DM board.
I think this issue was identified late on, and the solution was applied to DM boards delivered as spare parts, rather than being applied to WX-7 production.
CB
Statistics: Posted by cloudburst — Fri Feb 09, 2024 2:49 pm