Hello, I have been following this forum about keyboards for a long time. This time I have to ask about a problem I am having.
I have a Yamaha Dx7 Mk1, when playing a chord/note with an “infinite” sound, for example a pad, and holding it for several seconds suddenly the sound cuts off. This error happens randomly, sometimes it cuts off after a few seconds, other times the error never happens, and other times it takes around 20. …30 seconds or more.
Perhaps this problem is something common that happens in these models of keyboards that are already quite old. To complete the information on mine, I leave you these details.
This Dx7 has never had a repair from any technician, the battery has not even been changed. Right now the battery indicates 2.8 volts
It does not have any modifications or RAM memory additions. It is just like the original.
I have a sound card that Yamaha sells, it reads the sounds perfectly, and actually makes the same error as with the internal sounds. When playing a prolonged chord at some point it cuts off and stops playing, then if you play the chord again This rings again until the fault occurs again.
The Volume control works, but the “Data Entry” control apparently is not working.
The rest of the buttons and functions have no problems.
Please, if someone suggests measuring any component, I need you to explain it in detail so as not to make mistakes, I am not a specialist technician but I understand electronics, and I have a Polymeter to measure.
Maybe someone has had this problem before and knows exactly which component is failing?
I have read somewhere that they recommend changing all the capacitors, but I don’t know if that maintenance has anything to do with my problem.
Thank you very much in advance, if I need to send a video to improve the compression, let me know.