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Roland D-50 with two dead keys

Posted: Thu Jul 02, 2020 5:48 am
by deathvalleydog
I love my Roland D-50, had it forever.

A while back, one key stopped working altogether, and more recently a second one has failed. I've checked around and there do seem to be some parts available, but I'm kinda clueless as to what could be the issue.

Any Roland D-50 hardware savvy folks have some advice as to the best way to diagnose the problem before I go tearing into it/throwing parts at it? :?

~DVDog

Re: Roland D-50 with two dead keys

Posted: Thu Jul 02, 2020 11:48 am
by meatballfulton
Does the display still work?

Do the LEDs light up and respond to the switches?

Is there any noise at the audio outputs?

Does MIDI OUT work?

If the answer to all is NO, then start by checking the power supply.

Re: Roland D-50 with two dead keys

Posted: Thu Jul 02, 2020 3:54 pm
by deathvalleydog
Yes, everything else----display, etc, including all the rest of the keys----works fine. It's a completely functional machine, except for two keys that make no sound when you press them. The remaining 59 are good.

The two non-functioning keys also don't feel any different from the functional ones when you press them. So it seems logical that it's some kind of electronic (as opposed to a mechanical) issue. But never having seen the inside of this thing, I don't know how the mechanical action of the keys becomes an electronic signal ... some kind of electrical contact I assume? But I don't know.

That's why I'm here seeking wisdom :D

Re: Roland D-50 with two dead keys

Posted: Thu Jul 02, 2020 8:29 pm
by Yekuku
Hi , what you are experiencing is a common issue for the D50.
The problem is that the rubber contact strips that are under the keys , are either dirty, worn, torn or misaligned.
Image
In most cases they are just dirty , so you need to disassemble the keyboard and clean the contacts with rubbing alcohol.

Re: Roland D-50 with two dead keys

Posted: Thu Jul 02, 2020 11:25 pm
by deathvalleydog
Yekuku wrote:
Thu Jul 02, 2020 8:29 pm
Hi , what you are experiencing is a common issue for the D50.
The problem is that the rubber contact strips that are under the keys , are either dirty, worn, torn or misaligned.
Image
In most cases they are just dirty , so you need to disassemble the keyboard and clean the contacts with rubbing alcohol.
Awesome! Thanks so much. I'll give it a try and let you know how it goes :D

Re: Roland D-50 with two dead keys

Posted: Sun Jul 05, 2020 5:01 am
by fh991586
Another thing to check first before dismantling anything:
Using midi, can you trigger another synth using those keys? If yes, then the problem isn't with the contact.
Using another synth to send midi signals, can you play the notes of those keys? If yes, then it's most likely the contact that causes problem.