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Need Yamaha PS6100 Key contact circuit board and strip

This is the circuit board with contact area where key pressure is applied for each key. There are actually several of these inside and would like more than one.

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: Key sticks.

take it to the shop for repairs

Posted on Jul 02, 2009

  • 1 Answer

SOURCE: Do you have yamaha keyboard psr 2000 spare parts?

My keyboard yamaha psr2000,so I want parts silicone rubber keypad 61 and including electronic board,thank you.

Posted on Feb 14, 2010

SOURCE: My yamaha psr s900 has

Above are some manual links.

Hi, underneath if you look carefully you will see the Holes that contain the screws, no srtart in one corner, have a look at this one, there are often little arrows besides the correct ones to take out, in any event, work around the edges of the unit, undoing screws as you go.. look for all similar screws too, anyway remove them all.. now using a flat non-sharp instrument say a Butter Knife, at one corner again sort of slide the blade in between the case halves and pry open carefully. Put your screws into a container as you remove them, if there are differing types use different containers.

Observe all settings etc, write stuff down, plugs cables etc. do a drawing if necessary just go slow and methodical. Now once you have access, and that may not mean entirely taking the case in half even, whatever is required. now identify the piece you wish to replace and examine it, have a look to see how it is fastened, what wires go where etc. then remove the "Old" board, and replace it with the "new" board. (If you are confident all is well it may just pay to power up and see if it works)

If all is well, then carefully refasten it down, connect up as necessary, and make sure everything looks as it was, and close the case back up, doing the reverse procedure.. make sure you get it right first time or you'll have to do all those screws again. :)

Some screws can be under labels, so don't get caught by that one.

Always lay the unit on a big sheet of paper.

Posted on Dec 20, 2010

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If the backlight is on and just half of the display data is there, it is probable the conductive strip has come away from the display or the contact portion of the board where the conductor strip lays on the circuit board.

If it is under warranty, contact Yamaha. If it not under warranty, you can try to fix it, but once adhesive lets go, it is diffeicult to get them to premanently readhere. A repair shop that is Yamaha authorized is able to get the New parts from Yamaha that fit.

Apr 10, 2012 | Yamaha 88 Key Portable Grand w/stand

1 Answer

I have a yamaha PSR 240 and one of the keys (E) won't make a sound. Everything else works perfectly except for that. I could not find a category for yamaha keyboards or musical instruments.

Yep, a key contact has got contaminated... You have to disassemble the unit to expose the keys.

You have to remove the offending key which is OFTEN tied to a bunch of keys. Under the keys you will find strips of silicon rubber with little domes sticking up. Under the domes are two contacts, either two black conductive rubber or sometimes a ring with a pill in the middle. These contact circuit traces with a black coating on the board under the keys. Clean the pills AND the circuit traces GENTLY with ONLY 99% isoprophyl alcohol. Reassemble the keys and the unit.

Be very careful handling, especially the ribbon cables between teh upper and lower halves of the unit.

Note there are TWO contacts per key which one closes before the other and that is how the key velocity is measured by the processor.

Feb 12, 2011 | Yamaha Music

1 Answer

Some of the keys do not play on our Yamaha PSR-330. How can we fix that?

The key contacts have gotten dirty. The contacts are CONDUCTIVE rubber pills that are pressed onto circuit traces on the circuit board under the keys. Onehas to dis-assemble the keyboard very carefully noting the size and location of all the screws and using great care of the cables that connect the top and bottom of the case.
when you remove the keys, you will find silicone rubber strips with the black pills underneath, two pills per key.
Clean these with ONLY 99% isoprophyl alcohol and Qtips as well as cleaning the circuit board traces they contact.
Carefully re-assemble the keyboard.

Jan 09, 2011 | Yamaha MM6 Mini Mo Keyboard Pro

1 Answer

Tyros2 plays an additional note (F#3) when I play C3 & E3 notes

I have found my schematics. The F3# and the C3 and E3 all have common interconnects in the key scanning matrix.

The following diodes on the key contact board need to be checked:

D49, D50, D57, D58, D61, D62.

These diodes block the hazard paths of the scanning when more than one note is held down.

You MAY find some contamination is shorting one of the diodes rather than the diode being bad itself.

The scanning is of a conductive rubber key contacts so is high impedance as the contacts don't go near zero ohms when pressed. Leakage in the diodes can cause the problem. I would first visually look for shorts on the board affecting the conductors tied to these diodes.

Clean the board and contacts with 99% isoprophyl alcohol and Qtips.

You will have to remove the sets of keys that are held with several screws. I believe they are modular and the keys are in groups of white and two black groups per octave. Under the keys is a silicone strip of domes with conductive pills, two per note that are pressed onto the board. The two contacts close at different times so they can measure key velocity.

The key contact circuit board is in two parts, a high and a low section. To remove, you will have to remove all keys and the silicone strip over the section of board of interest.

Jun 23, 2010 | Yamaha Full-Size Keyboard

1 Answer

How do I remove the keys from a Roland KR 4700 piano? We can't figure it out. Please help! I can't afford to get a repairman. I need to replace the contact strip. It's happened before.

If these are semi weighted keys here is a cut and paste from a manual:
19. Disassembling the Keyboard Assembly
* After inserting a round stick (Rod: TX000670)
between the frame and the keys, remove the
circuit boards. (Fig. 23)
19-1 GHD EBUS L, MK SUB Circuit Board
(Time required: about 12 minutes)
Remove the seven (7) screws marked [260A]. The
GHD EBUS L and MK SUB circuit boards can then
be removed. (Fig. 24, Photo 5)
19-2 GHD M Circuit Board
(Time required: about 12 minutes)
Remove the five (5) screws marked [260B] and the
screw marked [262]. The GHD M circuit board can
then be removed. (Fig. 24)
19-3 GHD H Circuit Board
(Time required: about 12 minutes)
Remove the four (4) screws marked [260C] and the
screw marked [262]. The GHD H circuit board can
then be removed. (Fig. 24)
* Keys can be removed without removing the
circuit boards.
* After removing the GHD EBUS L, GHD M and
GHD H circuit boards, and the rubber contacts
can then be removed.
19-4 Rubber contact
Remove the GHD circuit board for the involved key.
The rubber contacts can then be removed.

The rod is inserted above the weighted hammer and the bottom of the keys from one end. It appears to be about 1/4 inch diameter dowel and will run the full length of the keyboard. You might use 3 foot ones from each end.

Screws are removed and the boards removed without taking the individual keys out.

Mar 17, 2010 | Yamaha NP 30 76 Key Lightweight Digital...

1 Answer

How to remove piano keys from Roland KR 4700

You probably need to just clean the circuit board and the conductive rubber contacts. There are two per key to facilitate reading the key velocity.

Use 99% isoprophyl alcohol and Q-Tips to clean both the board and the rubber contacts.

A rod is inserted lengthwise to hold the hammer weights while removing the boards. Use dowels from each end inserted about halfway back between the keys and the weight rods. Use a 1/4 inch dowel rod.

You have to take out a few screws to remove the boards from the key assembly. Be careful of the cables.

Mar 17, 2010 | Yamaha NP 30 76 Key Lightweight Digital...

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.

Jan 23, 2010 | Yamaha Music

1 Answer

Middle c will not play -- how do I get to the contact?

If this is a Yamaha synth (you didn't say what type) often the keys are done with conductive rubber "pills" that are pressed onto fingers of circuit traces on a board under the keys.

To clean, you have to dis0assemble the unit to get at the contacts. Often th keys will have the conductive pills in silicon rubber domes taht ALSO act as the key spring.

When you dis-assemble the keys whcih are usually in groups that have many screws retaining them, you can clean the pills in the silicon domes AND the traces on the circuit board with 99% isoprophyl alcohol.

A fatal problem sometimes happens if keys have been smashed down and there is a crack in the key circuit board. The board must be replaced and can be procurred from Yamaha Parts at Yamaha America in California. The Key circuit board is usually in a couple parts. The circuit traces where the pills hit have a very hard carbonized coating.

Dec 16, 2009 | Yamaha Music

1 Answer

The middle E key seems to come on at full volume occasionally even though it is played softly.

The contact under that key in the contact membrane is probably needing to be cleaned or replaced. It can be done by you but requires disassembly of the keyboard and removal of the key and adjacent keys to take the contact out. Rub the contact and the place on the circuit board where it makes contact with a pencil eraser and clean the residue off with isopropyl and a qtip. The membrane comes in strips and is replaceable if you can still get the p[arts. You might be better off to consider having it serviced. Hope this helps.

Aug 16, 2009 | Yamaha NP 30 76 Key Lightweight Digital...

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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