I'd like to share a problem I recently had with my PX-5S. I've had it just shy of two years, and I love its sound, portability, and ease of programming. I gig maybe once a month with it and rehearse weekly (almost). Other than that it sits in my home studio. I treat it gently. After playing out this past Saturday, I set it up the next day and found it acting odd. All the sounds were off by a whole step, and some layered zones were dissonant. I discovered the pitch bend wheel no longer responded (mechanically it was fine). The mod wheel and knobs/sliders all functioned OK. The general keyboard settings and operation were good. I reloaded the 1.13 firmware and re-initialized the board with the same results. I then looked at the MIDI output and it was spewing an endless stream of pitch bend messages all stuck at the max value.
I took the keyboard apart and checked the pitch bend pot - that was OK. What I eventually found was a "fault line" across a small section of the slider/knob board CNB1. The board was not cracked but the top conformal coating layer had split and started to lift the etches off that part of the board, eventually fracturing over time and causing the problem I had. I solved it by bypassing every trace that crossed that fault line with individual wires and adding some extra conformal coating to hold it all in place. The PX5 is back up and running normally now. To me this looks like a manufacturing defect during the initial board build. I've attached a photo for anyone that wants to see it. The rectangular section is the area that was damaged, along with a closeup of some damaged etch, and a side profile of the board showing the top layer height difference where the cracking occurred. I haven't seen anyone report this problem before, so it might be a one off issue with my keyboard, but I'll put it out here should anyone have a similar problem.
Regards
