Question about Roland Hp337 Digital Piano

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I have a key which had dropped and no longer works. Can I fix this? I'm fairly good with tools.

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This service manual will be close enough to your unit:

http://elektrotanya.com/roland_hp-335.pdf/download.html

Scroll down near bottom to where it says "Get Manual" and click on that.

They will let you only download two a day without being registered.

Posted on Mar 21, 2011

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How can I fix a broken key? A cat drop something onto my keyboard and a key popped off. It just floats there and I can't get it back in place.


Hi,

There are 3 different types of key fixing, can you let me know the model number and I will be able to offer you some ideas.

Sep 20, 2015 | Yamaha Portable Keyboard

1 Answer

Roland EP50 F sharp does'nt work.All other keys are fine


EP-50's are notorious for problems with either the 4.65 voltage feed to the velocity sensitive keys or failure of the small zenner diaodes. Each key has a pair fo split circles on the circuit board under it. When you hit the key you connect each side of the circles and the harder you hit the keys the quicker the circuits close the louder the sound. Problem is if the voltage to either circle fails, due to bad solder, scratch on circuit board, failed diaode then the sound disappears. The fix is simple if you are knowledgeable on solder on circuit boards, can use a multimeter and can dissassemble and reassemble the keyboard. If you have to take it to a repair shop it is probably not worth fixing as this is not one of the better Roland products

Dec 03, 2012 | Roland Music

1 Answer

Korg m50 freezes after 10minutes


Hello I have this M50 61 key korg model, I had the same issue the fix is simple remove the back cover on the unit, carefully push in all the small cables reattach them well do it to all the small connectors these cables get lose and cause this issue, good luck let me know if that helped I fixed mines that way its been working excellent since. good luck..

Jun 08, 2012 | Korg M50 61-Key Music Workstation Keyboard...

1 Answer

THere are a number of keys that are stiff or "stick" and do not play properly. IS ther a simple fix?


Check if front of key is hitting the case. If it is, analyze why it is happening. If unit has been dropped this can happen. One can sometimes move the whole key assembly back slightly if this is the problem.

Jan 03, 2011 | Williams Allegro 88-Key Digital Piano

1 Answer

My Roland Juno d has contact issues. I need to have the contacts cleaned once a year because I keep losing sound on some keys and some sound too softly. I am tired of shelling out $135 every year for a...


Answer:
Before i give you the right solution, i have to say that i have posted the answer to FIX the problem of all of the contact problems, people writing in how many of their keys are not working. And the post that they are showing is one that says to clean the contacts. That will not work.
Ok,
the answer.....
You can purchase a kit called Rubber contact kit here: http://www.mcmelectronics.com/product/20-3890&cid=prodCrossSell
or
Key contact Kit:
http://www.oaktreeent.com/Roland_Keyboard_Parts_Units.htm

These kit are made to re-coat the contacts on the keys. It will bring your board back to brand new condition and last as long if not longer than the original coating.
Also can be used for any rubber contacts like remotes or game controllers. etc.
This will work and i did mine after numerous times of taking the keys off and cleaning them.
I hope this gets out to all of you that are having the same problem.
Good luck

Jun 21, 2010 | Roland Juno-D

1 Answer

DJ LIGHTS


MOST DJ lights are not protected to be used outside in weather.

Other considerations are visibility from highways and also aircraft. Certain lights could cause a problem for these two scenarios.

When outside, often the distances are longer and the light drops off as the square of the distance.

Laser types require fog to get the effect and there really isn't a way short of getting the weather to cooperate and give you fog to get those effects.

Between the laws of physics and the construction of lighting intended for interior use, what you are asking for is just not easily obtained.

The inability to control ambient lighting outside is a real problem. Many of the DJ things require a fairly darkened room. The sky glow from a city is enough to kill off the effects.

May 19, 2010 | American DJ Flash Beam Lighting Effect

2 Answers

Roland hp550g digital piano has a couple of dropped keys


Power off the unit. Disconnect all cables that plug into the speaker base if you have one - It may be wise to document the individual wires to make their reinstallation easier. Remove the unit from the speaker stand and lay it on the floor on something like an old towel - you may get some dark colored grease on the rug. Remove the screws only for the bottom rear, not the front - you don't need to remove them. Do this by gently turning the unit upside down. Only remove the screws from the sides/rear bottom, and note which screw types you removed from where. Once all bottom rear screws are removed gently return the unit right side up. now pivot the top rear cover - the sides of the cover are attached to the rear - pivot it toward the back. No need to remove the ribbon cables - just let the top lay there or prop it up with something if the ribbon cables don't have enough slack for the top cover to lay flat on its back. You should now be looking at all of the keys uncovered. notice the rear of each key is where it hinges. You'll notice the grease at the hinge point. The keys are thin plastic so you must take care not to damage them. The way to remove a key is to spread the ears at the hinge point of the key you want to remove. I use a screwdriver sharpened to a point, but a large pair of needle nose pliers work good too. You insert the tapered point of the tool between the ears gently to spread them far enough to just clear the pins. Once they are spread wide enough you'll feel them disengage. Each key also has two hooks located side by side towards the front of the key on the bottom side - they are not visable until the hinge is released, but you must realise they are there or you'll either snap the key back onto the hinge or not be able to pull the key out once you've got it off the hinge. Pivot the key towards you to remove it. What you now have in your hand is not the defective part. You have the top that is touched when playing the keyboard. The defective part is still setting in the mechanism. What's actually happened is the keys are made of very thin plastic where they are glued around the weight and this plastic breaks leaving the weighted end down there somewhere. Examine where the key top came from and how it works. The key top is the part you took off of the hinge. You can see how the keys on each side work and you'll also see what is missing from the mechanism for the key you're working on. To make things easier I always remove one additional key top on each side of a key that I repair to make access easier. Just place the other keys you remove right behind the key area in the order you took them off so it'll be obvious how they go back on. Now the broken weighted mechanism you can lift right out. Actually you can lift it out easier with the weighted end broken off, but once you glue it back together you can still get it in there without to much trouble. You only need to remove the damaged weighted mechanism for the key you're repairing. I remove the key tops on each side of the damaged key for visability only. Take your pair of needle nose pliers and pick out the broken end. Now fit it onto the end of the weighted mechanism in preparation for glueing - just so you can see how it's going to go on there. I use a high quality modeling super glue. Before I came across this glue I used JB Weld, but it takes a few hours to dry. The high quality super glue allows you to put everything back together immediately. Installation is reverse of removal: Snake the weighted mechanism back in once you've repaired it - you can always examine those on each side if you get confused. Hook the key top front first then smoothly snap in place the hinge ears over the pins. Make sure to check the movement of the repaired key, and check also to see if anymore keys are setting lower as they may be in process of breaking off. Once all keys are repaired, carefull lower the top rear cover onto the key assembly. While holding the cover onto the key assembly/base, gently turn the unit over onto its back and reinstall the screws. Should be all washer headed screws - do not over tighten. Check the keys again. Set the keyboard onto its base (if it came with one) and you're done. A little practice and it'll take you less than a half hour to fix the key and get it back together

Feb 28, 2010 | Roland Music

1 Answer

I have a CDP-100 and need disassembly instructions for access to internal keyboard assembly. Unit was dropped while unloading from car. Now some keys are akimbo and won't play as though they are off their...


I just fixed my CDP 100 which had a similar problem - dropped and two keys not working up one end.
1. Lay keyboard upside down on soft surface. Under keyboard is plastic cover held on by 17 screws. Remove all these and lift cover away. The metal key ends are all revealed.
2. Locate the disloged keys. Carefully press them back into position - they will "click" into place. Make sure the corresponding key on the keyboard isn't stuck in an "up" position - you may have to remove the metal key part and replace it again while making sure the key is correctly seated.
3. Replace cover and screws.

Feb 22, 2010 | Casio Music

1 Answer

My roland Midi keybaord (pc 200 mkII) has keys that don't make contact...there are these rubber pads for each key with little metal contact on them ...they don't appear damaged, assuming that is the...


Over time and with hard playing the pads can develop rips in them and will no longer make contact. They used to come in sets and were fairly easy to replace. The second thing if they aren't damaged is to clean them by rubbing gently with a pencil eraser and removing the residue with rubbing alcohol. The same can be done on the circuit board where the pads make contact. Make sure everything is perfectly clean before reassembly. Hope this helps.

Jul 11, 2009 | Music

2 Answers

How to remove keys for complete cleaning


I've worked on a lot of keyboards and they're all different.
Unless you have the service manual, a good set of electronic tools and have the time, don't attempt it, take it to a keyboard services specialist. If they know what they're doing, you'll get you keyboard back in good working condition.

Apr 30, 2009 | Music

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