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Yamaha DGX620 Hi, your answer to another question makes me think you are just the man for my problem! I bought my music student son a DGX620 last year and when moving house a few weeks ago he caught one the keys which lifted and is now sticking up and he doesn't want to force it back. Any idea how to go about re-locating this or obtaining a service manual to see how it should be done? thanks Mike

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Unfortunately you have a broken key and will need to replace it. If you are really lucky the pieces may have fallen inside the keyboard and once you disassemble it you can crazy glue them back on the key. You will have to get it apart far enough to remove the key bed assembly. Otherwise you are better off taking it in to be repaired. Replacement keys are getting harder to find especially for the older Roland keyboards. That is why it might be easier to take it in unless you can do what I mentioned earlier. Hope this helps.

Posted on Oct 23, 2009

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I need Repair manuals,Yamaha DGX 620
Thank.

Posted on Sep 25, 2009

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Does it have an internal battery?


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1 Answer

Only blue light with blank display on power on


Dear Joseph,

I had similar problem with my DGX620. In my case the display sometimes got blue and sometimes worked fine. The cause was a bad contact of the display flat cable.
I opened the DGX620 and then I cut a small piece of plastic film (35mm negative) with exactly the same width of the flat, disconnect the flat cable and then reconnected it using the film on the other side (non contact side) to increase the pressure and guarantee a good contact. No more problems from nov-2012 till now.

Good luck !
Paulo de Tarso (Brazil)



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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.

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Guitar date of manafacture


What you have listed is an invalid serial number. If you go to:

http://www.yamaha.com/apps/guitararchives/guitarserial.htm

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2 Answers

The LCD display on our yamaha DGX620 has disappeared: it lights up but there is nothing showing on it. Have tried adjusting the contrast button with no success. Any ideas please? Gill


I would open the unit and see if a cable to the display has fallen off.

You have not mentioned if unit is operating except for that.

If totally inopperative, check power supply to the unit. The display can illuminate well below the operating voltage for the synth.

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1 Answer

DGX620 blank blue screen and "hum" when I turn it on


Try the contrast control. My DGX505 suddenly had a blank blue screen, I found that mygrand daughter had been fiddling with knobs and switches and discovered one I hadn'y noticed. On the 505 ot is located on the rear panel right next to the USB port. A slight tweaking of the lnob and all was restored. Heart attack avoided. And I learned something from a 4-year old.
Hope that is all it takes for you too. Good luck!

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