Roland RS-09 Popping Sound when playing keys

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Roland RS-09 Popping Sound when playing keys

Post by McSnellzy » Mon Nov 09, 2015 3:19 am

My Roland RS-09 recently started making a popping sound when a key is pressed. I've had it for over 10 years and I'm pretty sure it just started happening. Has anyone else experienced this before?

Here is a video so you know what I'm talking about.

It also makes the same sound when hitting the ensemble buttons.

The service manual is here. ... _NOTES.pdf

It is not the keys themselves and I'm pretty sure it's not a grounding issue. Some of the caps on the Gate PCB look questionable but are in spec in and out of circuit.

Any help would be greatly appreciated! I need this for a gig coming up and this sound is driving me nuts!

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Re: Roland RS-09 Popping Sound when playing keys

Post by HaziaJuno » Tue Nov 10, 2015 7:09 pm

I've read threads to this effect before, and one thing I have seen suggested repeatedly is trying to adjust the envelope timing. I have no experience with the RS-09, but my experience with old Roland gear suggests there may very well be an internal trimpot especially for this purpose - if you tweak the attack on the envelope generator just a hair above the zero mark, it may soften the EG just enough to fix it.

The VCA may also be needing calibration, if there is a trimpot to adjust that, try playing some notes while making adjustments to that - this may also fix the problem.

I hope this is maybe of some help. I sympathize with your frustration.

Good luck!

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