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.

41 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!

      1. Hello Maarten – I have the same problem with my HP 136 piano. Can I ask what part number it was and where you got it from? Thank you, David

  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.

  16. I had a few keys that stopped working and one that had an intermittent problem. After removing the keys I was able to press down on the silicone switches (with the two small magnets inside) with a screwdriver and found them functioning. I’ve run into this sort of problem before when something was spilled on a keyboard. I disconnected the two ribbon cables from the underside along with the black jumper connection (between the two keyboard circuits) and flipped the keyboard up on it’s back. Then I removed the (umpteen) screws holding the circuit board in question and removed it. With the “business” side of the board exposed I removed the silicone key switch strips where the offending keys were.I then cleaned the circuit board and the magnets of what looked like coffee (probably). Using a blunted toothpick I carefully repositioned the silicon switch strip and pushed the securing tabs back through the circuit board. I reconnected the ribbon cables and the jumper wire and plugged it in. Success! It’s not a difficult job at all if you pay attention to everything as you disassemble. Took less than an hour and the pianow now works perfectly.

  17. Hi all – I have an HP126 and have had some stuck or stubborn keys that I’ve fixed over the years…but today an altogether different problem occurred while opening it up and trying to make a familiar adjustment. One of the key’s springs rolled across the inside and seemed to touch a circuit board. Afterwards the unit no longer powered on. Power light won’t turn on, no sound. II’ve located four fuses inside, and none of them seems to be blown. There was no smoke or spark or anything, just immediate loss of sound and power. The unit does making a “click” sound after 2 seconds when I press the power switch (as it always did), but no response thereafter.
    Any other thoughts or suggestions?
    Thanks!

  18. I am rebuilding a Roland HP 126 and have determined that the previous owner had a “minor” soft drink spill that degraded the right contact board. it is labeled “Right Contact Board” and PCB 440.00.0631. Any idea where I can find one of these? I’ve tried all the usual suppliers around Austin, but no luck. I was hoping it was just the sensor strip, but the damage to the board took it out. Thanks..tony
    Tony Arnold
    Austin, TX

  19. anybody had problems with the tuning knob, bought a hp 136 with a pitch problem that stems from the tuning knob?

    found this product here on Syntaur https://syntaur.com/Items.php?Item=3683, i am thinking to order it and replace the old one.

    as i don’t really know whether the problem will be fixed i wondered if anyone had some similar issues

    best regards
    Calin

    1. Hi Calin,

      I actually had the same problem when I got my HP-136 second hand. Tuning button broke, and the keys were out of tune. Soldering in a replacement part like the one you mentioned, solved it for me. The part I used was slightly different.

      Best,

      Maarten

  20. I have a Roland HP-136, which I would like to sell. A prospective buyer tried it out and half the keyboard wouldn’t work – no stuck or sticky keys, just no sound. It was worked yesterday. I do not play myself (it was my son’s piano) so I am not sure what has happened. Any thoughts anyone?

    1. Hi Pernille,

      I was once in this situation that no sound at all was coming out!.The solution was quite easy for me – I had to properly connect the bottom ( with the pedals ) with the keyboard using the attached cable. After that, the sound worked again.

      Hope it’s an easy fix for you.

  21. Thank you very much for these instructions! I have a problem with 3 keys and will try this out in the future. I know that my father was able to once repair a few keys on his own – unfortunate that I didn’t watch when he was working on it! 🙂

  22. My old Roland HP 136 was still working perfectly when a snapped hammer cause a key not to return to its up position. I could not figure out how to free the key completely, but thanks to your post I learnt that I had to slide the whole rack of keys backwards a little. Thank you, John!

  23. Hi. Thanks for all this information.
    I bought a hp137 where five keys lower end were muted. No sound at all. I took out almost all screws, lifted off the lid and removed a few muted keys, vacuumed etc. No result.
    Then I took out the whole keyboard and turned around. There was some white residue under it. Someone spilt cokacola? Anyway I released the flat cables and unscrewed the print on the downside, where the elektronic contacts a located under silicone hood. I removed the silicone hood and cleaned it in an ultrasonic cleaner. I cleaned the print with a damp rag and contact cleaner.
    Then I replaced the silicone hood with the help of torx screwdrivers to press the round legs into the holes on the print. I lubricated with fluid silicone (very little)
    Reassembled the whole thing, and yanowat? Plays again.
    Just take your time. It’s an easy job.
    BTW. Paid usd 200 for the thing.
    Greetings and merry holidays 2021🎅🎅

  24. The major problem with this old digital piano seems to be the brittle plastic of the hammers.
    When I opened mine up, I discovered the hammers of the 3 broken keys shattered, but also all the other hammers starting to crack and chip. Sad to watch a loved object fall apart, but these instruments just aren’t made forever! I did find replacement parts available somewhere, but they’re expensive and not worth it. Super glue works fine but how permanent is it, really?
    I repaired my HP 136 a year ago and none of the hammers have broken ever since, but that might be because I barely played on it after that. When I realized the piano’s time was close to come to an end, I ended up investing my savings into my first (and hopefully last) “real” upright piano, and I haven’t looked back on the Roland ever since. Wow what a difference! (Obviously, but yet.)

    I highly appreciate this little blog post and I think it’s beautiful when it helps this little “senior” instrument to survive a bit longer and give some folks the opportunity to get a good playing experience for little money! Because I have been loving it to bits for 9 beautiful years.

    1. Glad you enjoyed the post, Siese. I’m pleased to report that my superglue has held up extremely well after almost 11 years of almost daily playing since writing this post. I’ve superglued another 10-15 keys since then, but have rarely needed to superglue the same key twice. There’s life in those ivories yet!

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