Question about Yamaha Full-Size Keyboard

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2 keys(reeds) are not working ,my keyboard is yamaha DGX200,how to open it

Plz tell me how to open the keyboard & clean the keys

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  • pranay_livin May 18, 2009

    when i on my keyboard i can see that the function buttons are worrking.but the reeds are not working.can any one tell me how to open my keyboard?


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Posted on Oct 31, 2008

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Yamaha psr 295


Hi, This is probably due to worn rubber contacts. The sound is switched by pressing a key which in turns press a carbon contact on the PCB under the key. In time these wear out and need to be replaced.

Firstly open up the keyboard and locate the rubber contacts, check to see if each one is seated squarely, if they are not seat straight then this can create the problem you mention.

If all are OK then you will need to replace the strip which is causing a problem.

Spares are available from many sources including :

http://www.beckettsmusic.co.uk/shop/scripts/prodView.asp?idproduct=16049

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Yamaha psr 550


When PSR550 keys stop working, or are intermittent, in any arrangement, this can be fixed (with work). There is probably TINY dust or debris which prevents a clean key contact from taking place; you must unscrew and open the PSR550 up like a ****, then unfasten the bottoms of the keyboard circuit boards. You can figure out how to move them without totally disconnecting them. You will observe how a tiny rubber-mounted contact presses against an interleaved circuit-board connection pattern to make contact when a keyboard key is pressed. Any dirt or crud on the contact area of the circuit board must be removed, because it will prevent the conductive contact from bridging the circuit cleanly and fully. I used 91% alcohol and QTips to clean all contact surfaces. It took me a couple of disassemble/assemble cycles to get all the keys clean and working, and the PSR550 back together. But first download the service manual: it will show you how to open it and access various components. You will see that the keyboard switches are much like calculator buttons on a TI-83 calculator. They are pretty well enclosed, but you will see how much dust can settle in just through various humidity conditions, especially if you take it to gigs. Good Luck.

12_9_2012_4_53_49_am.jpg

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1 Answer

1 key is not producing any sound its D.. n the midde c.. is sumtimes producing a sound n sometime its not.. kindly tell wat has happend to my synth psr i425


Key contacts are dirty. You will have to service the unit. The contacts (two per key) are conductive rubber "pills" that press down on circuit traces under the keys. Use ONLY 99% isoprophyl alcohol and Q Tips to clean both the black pills in the silicone domes and the circuit traces themselves. Be gentle when doing this. When opening the unit, be careful of all the cables as they are easily damaged.

Nov 01, 2010 | Yamaha YPT400 61 Key Portable Keyboard...

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How to store music we play on yamaha psr i425??? and how to transfer dat to pc? plz help


You will need the CDROM that should have come with the keyboard when you purchased it. On it will be the drivers that need to be on the computer for it to use the usb. The link to the manual is here:http://www2.yamaha.co.jp/manual/pdf/emi/english/port/psri425_en_om_a0.pdf Please look at page 86. If you don't have the CDROM you may be able to download what you need by contacting Yamaha by email through this link and asking:http://www.global.yamaha.com/support/contact.php I hope this helps.

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1 Answer

My psr-230 keyboard does not work well, some keys


The key contacts proabably need to be cleaned.

One has to disassemble the unit being very careful of cables. Do not force anything.

The contacts are usually black conductive rubber "pills" under silicone rubber domes. These are often in strips covering several key contacts.

Clean both the pills and the circuit traces on the board they contact with 99% isorophyl alcohol and Q-Tips.

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1 Answer

Estey chord organ giving off sharp metallic smell


The organ is basically a harmonica gated by keys. It has reeds and a fan.

I would open it up and clean everything. It is possible a mouse has gotten in there and they stink including their messes for quite a while.

You might need to lube the fan.

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6 Answers

How doI open a Yamaha P120 to fix sticky keys?


I've had the very same problem twice so far. The only solution I figured is to simpy purchase an equivalent key (contact Yamaha service in your country for this) and to replace the broken one. The reason why the key doesn't work smoothly as the other one is not dirt therefore any cleaning won't help. The key is cracked deep in the place where it's attached to its 'axis'. So you'll need to remove all the screws and unmount the cover (it needs a sideshift to open once the screws are removed), be careful with the speaker wires. However you'll need firm moves anyway. Opening is tricky and gets me surprised anytime I do it so you'll need some courage :). Replacing the key is even more tricky. You'll have to remove the broken one by pulling it horizontaly (use some force, it's broken anyway). Placing a new key you'll need to uplift the 'hammer' and then slide a new one. I'm sure you'll figure it out once you see it with your own eyes (it's really hard to decribe but not so hard to do it). Hope you'll do fine. I haven't tried glueing the crack for I doubt it would work for long. Good luck!

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1 Answer

2 keys(reeds) are not working ,my keyboard is yamaha DGX200,how to open it


It is a design fault. A technician advertising on the net informed me i can get it fixed by him and yamaha will pick up the fee.

Nov 12, 2008 | Musical Instruments

5 Answers

Yamaha digital piano clp 170


This is a common problem with Yamaha keyboards. The problem is caused by worn-out rubber contacts in the keyboard assembly. In my old Clavinova CLP-500, there was one long rubber contact strip under the keys with two parallel strips of semiconductor material. The Clavinova circuitry determines key velocity by measuring the timing between when the key hits the first and second strips of semiconductor material. The harder you play a key, the less time it takes the key to hit the second semiconductor strip after hitting the first.
After years of playing the keyboard, the keys eventually cause tears in the semiconductor material and this messes up the timing measurement for key velocity. The only solution is to take the keyboard apart and replace the rubber contact strip with a new one.
I got rid of my CLP-500 four or five years ago and got a new CLP-170. The CLP-170 is now having exactly the same problem that the CLP-500 had. Yamaha has re-designed the rubber contacts in the CLP-170 so that there are now eight individual contact strips instead of one long one. The problem is essentially the same, though. You have to take the keyboard apart and replace the worn out rubber contacts.
Here are the part numbers for the rubber contacts that need to be replaced in the CLP-170: V8286600 Rubber Contact, 12 keys, D-C#   Qty. 6 V8286800 Rubber Contact, 11 keys, A-C#   Qty. 1 V8286700 Rubber Contact, 5 keys, D-C   Qty. 1
I suggest you also get a copy of the CLP-170 service manual, part number 001677. It has descriptions of all the steps necessary to take the thing apart and put it back together again. You'll also need a "rod" (which is just a long dowel), part number TX000670. Before you take the circuit boards off the keyboard assembly, you have to insert the dowel between the keys and the frame to keep the keys from falling back and getting in your way. A 5-foot long 1/4-inch dowel will probably work. (I haven't yet taken apart my CLP-170, and I don't have Yamaha's "rod," so I'm not sure if 1/4 inch is the right size or not. I'll report back here if it's not.)
Good luck, Howard

Sep 03, 2008 | Yamaha Full-Size Keyboard

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