How to fix a Roland HP 136 Digital Piano

I wanted to investigate a dodgy key on my Roland HP 136 Digital Piano, and found the web to be surprisingly unable to advise me on how to go about this. This post presents some information that I had hoped to find. (Follow this advice at your own risk, I merely claim that this worked for me.)

Opening the case

  1. Remove two screws from the underside of the piano …
  2. … then three screws from the back of the piano…
  3. … and then lift the lid. Result:

Removing a key

  1. Unhook the spring at the back of the key.
  2. Push a screwdriver into the slot (as shown in the photo below) and prise the key out.
  3. I found that in order to free the key completely, I had to slide the whole rack of keys backwards a little. This required removing several more bolts from the piano’s underside.


It turned out that the dodgy key was caused by a snapped hammer. I superglued it back together and it has been playing fine ever since.

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27 thoughts on “How to fix a Roland HP 136 Digital Piano”

    1. Why Not? Many people are just as capable to repair something as well as a “technician”.
      I do not wish to hear,
      ” I don´t suggest anyone to fix their own digital piano “

  1. Hi John,

    It appears I have experienced the problem as you had. I too have an HP136 and one day, one of the keys suddenly went a bit loose. After opening up the piano up (following your instructions), I also found that one of the hammers had snapped off

    I had hoped that it would have been a part that can easily be replaced, but it seems that on this type of piano, the whole keyboard mechanism is one ‘whole’ and cannot simple be taken apart and reassembled.

    I think I will also try to reattach the broken hammer with some superglue. Can you give me some tips on which kind of glue you used?

    All the best from the Netherlands,

    Maarten

  2. Thanks a lot! Really helpful, and now the binding key is working again. Some cleaning was all that was needed.

  3. Thanks John! I was actually working on an old RD-200 piano, and while that model does not have hammers, your tip on removing the keys helped me to realize that I should try to remove my keys to investigate the problems I was having with several dead keys. I was able to remove the keys and then vacuum the problem areas and wipe away the dust and grime from the related circuitry and now all five of the dead keys I had work fine. If you are ever in Ottawa Canada the beers on me!

  4. Thanks for sharing your info and clear pictures.

    I had same problem witch i solved with your help..
    Now my 6 year daughter can play her lessons again..
    Thanks Jari

  5. excellent instructions. I was able to do the same thing with a HP-236 piano from Roland. With HP-236 you just have to different number of screws but the key comes out easily by releasing the front of the key with a screw driver.

    1. I have an hp236 by Roland and the keys look completely different. Where did you put the driver to get the key out? Also, does anyone know where to get service manuals for Roland pianos?

  6. As a technician I to would like to know where to get troubleshooting information. We bought the 236 for my son to play, we have no clue how to play but enjoyed the built in demonstration pieces which no longer function. John Nennig

    1. I’m trying to sell a HP137R for my auntie, but only discovered when the guy came to buy it that the first four keys aren’t working since the last time she played it a good few years ago. These are the keys that are used to switch the sound between harpsichord, piano and something else.
      The music shop that sold it told me that in the event of a software failure such problems as keys that suddenly stop working can be remedied by doing a ‘factory reset’, as opposed to looking for a mechanical solution. Sometimes the software gets garbled, much like a PC’s OS.
      Worth a shot before you start taking it apart.

  7. Thank you ,thank you ,thank you, i followed you instructions and managed to fix 6 snapped hammers in my roland hp136 i used epoxy glue for more durability and it worked like a charm i also had to unscrew all the bolts downside to free the keys completely as you mentioned before .

  8. U DA MAN! 🙂 I had lost a key myself, and followed your description. Nothing was broken, but I think the rubber switch underneath the key had taken a beating. with some kind “massage”, it came to life again!

    Thank you very much for sharing!

  9. Good one! Please my HP 136 has a problem I’ve been trying to tackle but all to no avail even the technician couldn’t fix it. It suddenly sustains while playing and atimes the sound just cut off while the power is still on. Please I need an urgent solution to it. Help me out.

  10. Gracias John. Una vez abierto el teclado y desmontadas algunas teclas alrededor de la que quería reparar, he encontrado que uno de los contrapesos estaba roto y caído. He puesto pegamento rápido en la barrita metálica y en el plástico de la funda. Ha quedado como nuevo.

  11. Hi John, thanks for this helpful post. Can you tell me what was the original symptom you observed that was caused by the broken hammer?

    Thank you!
    Moan

  12. I have a Roland HP 126 digital piano
    serial number ZK7 0651 E.
    pedals not working.
    Suggestions welcome.

  13. I have a Roland HP 1700L piano.. the sound freezes after few minutes of play. it remains like that till you turn it off. I need a help on how to fix it.

  14. I have a Roland HP 136 and the transposing feature is no longer working … this is after it has semi flattened the whole keyboard and I can’t retune it as the transposing dial no longer seems to be working. Any help would be greatly appreciated.

    1. I had the same problem where the transpose key was flattened after transporting it in the car. I fixed it by taking the electric part out that was attached to the transposing dial and replacing it with a similar part I bought from an electronics store ( soldering it in ).

      Works like a charm now!

  15. Hi. First of all – thank you for this guide, I works like a charm! Now the fun part – I have no idea what is happening with my Roland, since the hammer look fine (at least nothing looks broken, I cannot really take it off though to check) but when I press on it, it doesn’t make any sound. All other keys work perfectly fine. The only difference I spotted is that between the dead key is plastic, which looks different than in the keys nearby. Normal looking plastic shows the metal string, but this one is just around 1,5 cm long. I tried to move it, but even using a tiny bit of force I cannot move it. I have a picture, but cannot post it here 😦 Anyways, please help! Do you think it could be something with electronics? Also, since the keyboard wasn’t used for some period of time, it could be that some parts just got slightly “rusted”, but I don’t know really where to check it. Under the keys everything looks pretty the same.

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