Question about Korg Pa800 Synthesizer

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Hello i have a korg pa 800 just a while ago something happened it was fine i was using it and all of a sudden it just got really pitchy and the sounds seem to mix and its sounding really off key even simple things like piano what could be the problem

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  • lukic8 Jun 04, 2010

    Do you know where locations for repair on these kind of instruments are. I ve taken it to long and mcquade and a couple places they say they have no idea what the problem may be but say most likely the sound chip has gone. The keyboard most sounds like the sounds on the keyboard are mixing together switching back and fourth from speaker to speacker the effector. even the basic factory stuff on the keyboard after a system reset and reinstalation sound funny and not normal

  • lukic8 Jun 05, 2010

    Yeah from what ive seen everyone where ive taken it just seems to or claim to know what they are doing and just giving some big prices for repairs. But nobody has yet told what the problem actually is i am located in vancouver bc canada. I really dont know where to take it or if its worth the money for the repair.thank you

  • lukic8 Jun 07, 2010

    Hello message about the korg well ive tried with the keyboard problem being is that all the instrument sound really abnormal drums piano everythng. Even the factory when i have gone and formatted and reset to factory settings all the keys sound really off not in tune. Its all completely mixing. WEll prior to all the sntuff thats happening now i was playing the keyboard in the morning and then left it for a while after i came back too it, slowly started to sound a bit off and then got worse and worse. I really dont know what it may be and here in vancouver there is no place really taht does repair there used to be a korg repair in canada but it seems to have moved where do you go about getting your parts if you dont mind my asking. This secret site does it mention problems like what my korg seems to be making. Or any ideas on what it maybr

  • lukic8 Jun 07, 2010

    Ok if its foreigm And where cani purchase this circuit cooler so you would actually spray this cooler into te keyboard on the chips

  • Deepak Sant
    Deepak Sant Nov 11, 2013

    Hi - I am having same problem to my PA 800. Sometimes sounds are suddently Off tune. When you restart its back to normal for a while and then it start detiroarating again.



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If this is not a low power supply problem, you might try circuit cooler to isolate the bad part.

Beyond the power supply I would recommend taking this to a shop for repair ONCE you have tried a factory reset.

Use this site for downloads:

Posted on Jun 04, 2010

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  • Fred Yearian Jun 05, 2010

    Well, I can tell that where you took it are not qualified by a response like "sound chip"... There are MANY chips that are involved in the generation of the sound.

    Frankly, I suspect that no service facility will repair this at the component level and will basically do a board swap of the main board in the unit.

    Google Korg parts to find where you can call to get idea of what a main board would cost or the possibility of getting a refurb and swapping it out. It will not be inexpensive... probably $400 or so as a pure guess... All the repair thingsd listed are just the dealers which are for the most part useless when it comes to repair... they have to send it out...

    The parts things when I used my zip code in the finder showed only one in Vermont and one in Arizona which are probably the only ones in the USA... this forum doesn't tell where the person is so I don't know if you are in the USA or where you are...

  • Fred Yearian Jun 05, 2010

    You are up the road from us... I am in Renton WA USA.

    I think that one of the larger chains in Seattle area MIGHT be able to have your unit repaired. I would contact Guitar center on East Andover in Tukwila which is in the South greater Seattle area. They don't do repairs themselves but have other service outfits do the work and they are big enough to know where to send it.

    I repair my own stuff but I don't have access to the schematics for a lot of stuff and without a schematic it is hard to repair stuff. I have a secret site I have found stuff but they don't list the PA800 only a PA80 which just might be the same thing... The problem is most of the stuff uses surface mounted parts and while I have equipment to change some of those, getting replacemnt chips for these special purpose things is near impossible...

    Call the Arizona Korg parts place and find what a replacement board would cost... you could probably replace it yourself but there needs to be a bit more troubleshooting first...

    I want you to carefully hit notes going up the scale one at a time and look for sudden changes in how the voice sounds. What we are looking for is if POSSIBLY several notes are firing at once. A failure in the scanning matrix could cause this and could be several reasons including cracked circuit board under the keys.

    If you know of any activity that led up to the failure let's hear it...

  • Fred Yearian Jun 07, 2010

    The site in a foreign country ONLY has schematics of a few hard to get things and those not published by the manufacturers. There are no trouble shooting tips.

    I would open the unit and carefully use circuit cooler on some of the chips on the main board, looking for any change in the sound. A wild guess might be the digital to analog conversion chip where the sound finally is converted from digital to analog.

    When you open the unit, avoid any static discharges by grounding yourself to mounting screws within the unit. Carefully flex the boards by gentle pressure, again looking for any change in sound.

  • Fred Yearian Jun 07, 2010

    They used to have circuit cooler at Radio Shacks... not sure if they still do. You would need to open the unit so chips are exposed. Then activate a sound and then spray the cooler on a chip and wait about 10 seconds to see if change occurs, then move on to next chip and so on...

    Here is one source of the freeze mist:

    It is also used in the medical industry for freezing specimens before diagnostic slicing...



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