Repairing silicon rubber membrane contacts; Installation instructions

[danielortizdecaracas]

thanks a lot, please repeat all procedure video, but taking to close captiions zoom in in your aproach of this materials and zoom in in cuts parts

[sounddoctorin]

@danielortizdecaracas Rather just go to the sounddoctorin site listed in the info and look at the .pdf. it's a lot better really.

[danielortizdecaracas]

hi mr thanks a lot for you video, this method is valid for kawai k11?

[sounddoctorin]

@danielortizdecaracas I assume it has the rubber contacts. I'm not SURE if they are concentric ring or not though. Some Kawai's were. If so you'd have to cut your own 'ring' part. You could sharpen the ends of tubing to make a cutter or something and do it probably but GENERALLY those clean up so I've had no reason to try yet.

[quint9000]

I had an OB8 in for calibration. None of the keys worked. The customer doesn't care because he midis it. You can't calibrate it unless the first octave of keys work. I ohmed out the contacts and found they were ranging from 15k to 100k each. With my decade box I found that if you get above 5k you can't trigger a note. No amount of cleaning will fix these contacts. I'm going to try your solution.

Quint

[sounddoctorin]

@quint9000 Hi Quint, yeah that's way out of bounds. Exactly. Moreover if the surfaces measure over 700 ohms or so you won't usually get CONSISTENT performance due to the non-ideal nature of things at the interface there. In practice if you are getting 2000 ohms laying probes on the surface the contact is useless except as a button to increment or something. There will usually be at least a delayed response or sporadic contact.

[stormyandcold]

Thanks Bob, I purchased 2 packs of the Nasa pads for my Juno D and redid all the keys (122 contacts) works great and like new now. Recommended product A+++

[Ni5ei]

@souddoctorin Thanks for the replies. Don't get me wrong, I'm really happy I came across this video and your method is great! If I ever need to restore a vintage keyboard with these rubber switches I will immediately order from you. But I'm repairing a Juno D at the moment and got a reply from Roland today about the strips. Roland usually charge very reasonable prices for spare parts and the 5 strips needed for the Juno D cost me €15.95 (less than $22) including shipping.

[sounddoctorin]

@Ni5ei That's great to hear! Probably because on this particular keyboard Roland has had a lot of problems. (like I say if under warranty just get it replaced!!) I deal mostly in 'no longer in stock' items of that nature where it's part of a scrap out of what sometimes would be an otherwise ok but cosmetically ganked unit or something. So to make it play out I have to charge more like 10 bucks a strip or so depending on length. I usually figure 1.50 per contact on vintage ones. 

[slippast]

After replacing the battery I meticulously cleaned my new Polysix's contacts and less than 48 hours later things were already going south again. I'm excited to give your solution a try.

I just placed my order. Thanks Bob!

[Ripprock1]

Bob you are the wizard.Thank You.I will have to invest in your product. Feel I owe you for relieving me of so much anxiety and frustration over the last two years.Have a Triton LE that everyone that comes into my studio wants to have something from it on thier recordings.For two years I have literally played around the middle "A".Watched your vid and got the nerve to go inside and do it myself.Luckily there was just a speck of something on one of the contacts.

[sounddoctorin]

@Ripprock1 That is often the case on the newer stuff. The contact disks I developed are very useful for the older ones of for occasional newer ones where someone spills something that ruins the conductive properties of a contact etc. Glad you worked it out on that one!

[casioPX500L]

Please, do video how to repair casio privia piano. they have a klonknoise from hammer action.

[sounddoctorin]

@casioPX500L Hi, The only issue I've seen with those thus far is people dropping them on their back or top and some of the pieces getting knocked out of place. You have to pull the bottom as i recall and you can pop the pieces back into their resting hinge location. That's the only issue I've seen thus far on those and I don't have one here to do a video on it.

[kiyoshi67]

Thank you so much Bob, your kit help me replace all of the contacts on my Roland Juno-D, and now it works like new again. Took a few hours, and I did lose a couple discs, but once I got the hang of it things were smooth. I played a show the night I did the replacement, and it went perfect. Thanks again!

[sounddoctorin]

@kiyoshi67 Excellent to hear! Let me know if any problems ever arise. From what I've seen over the year or so we've been testing these no issues and it just looks like more stable stuff than the original so hopefully it's good for a long long time!

[Ni5ei]

@kiyoshi67 The Juno D has 122 contacts. Did you replace them all? That would cost 2x $26= $52. The original spares are still available and probably cheaper?

[sounddoctorin]

@Ni5ei I have no idea what Roland charges per contact strip... those are 12 and 13 space. I looked up btw and there IS A SERVICE NOTE on this. To the ORIGINAL OWNER (proven by slips) they WILL upgrade the keyboard to an improved design! Good to know! See a service center near you and get that done if you are an original owner. If NOT they claim it's usually a dust issue so just following my cleaning instructions on the general synth tips on my sounddoctorin site.

[sounddoctorin]

@Ni5ei PS I imagine they charge at least 5 a piece but probably more like 10? So it'd be maybe about the same I don't know. Whatever the case my contacts are likely better than original material at least so no great loss for people who have done it already.

[Sjobeck7]

Sounds like a great solution Bob for all of us Vintage Synth fans with recurring key contact problems. You are the man!

[chizmo7]

Hi,

I'm interested in purchasing this repair kit for my OB8. I went to your site and when I click on "email", it assumes I have some sort of windows email connection and gives me some pop up instead of your email address. I need your email address.

Thanks, Matthew.

[sounddoctorin]

@chizmo7 Hi Matthew...that's the standard code for initiating an email on most systems. I should add that though since probably more people are just using ones that aren't integrated that way. Go to sounddoctorin page and just click the address link (that way spam harvesters won't find this post :-)

[ohmslawmusic]

Good Stuff Bob.

It'll make Alesis HR-16s happy.

[realityfakers]

@sounddoctorin hmm so I take it that means you don't like shipping to the U.K anymore then? (trying to work your reply out).

Anyway we are not all shady characters in the U.K, I've bought plenty of synth parts from the US (Blue LCD for sy77 etc) and always accept slower postage.

I guess it's time to get the soldering iron out and do the yammy thing (quite long winded as it requires a lot of custom wiring/rejigging) but I guess it will be pretty much 100% reliable when done. :) thanks

[sounddoctorin]

@realityfakers Hhee.. no no I've had great luck overall with people in UK. Just warning you about this one rip off artist. And since paypal has I find an immoral code of conduct I'm not using them on any more non-tracked packages. So people can either pay the crazy price, visit him and get him to pay for his order that I'm sure is setting on his MS20 and JP4 by now, OR I can get google checkout working...OR they can send money orders.

[realityfakers]

Do you ship those pads to the U.K? I have a polysix and would prefer to try these simple pads before I go the whole hog and custom fit my yamaha type metal contacts in place of the original (got this working in prototype but original is best of course for re-sale)

[Arthur60]

Thank you very much Bob for this detailed repairing techniques.

I've been asked for this, gone link your video and website!

[sounddoctorin]

@Arthur60 Thanks, I put up a link to this on the website instructions now. Blessings, -Bob