PA800 is producing noise

sanalc · Post by **sanalc** » Fri Apr 09, 2010 10:42 pm

Hi,
My Korg PA800 is giving a hissy noise with all instruments. Its like 'zzz...' an FM radio which is not tuned properly. I am unable to use the keyboard because of this. Anyone has any idea why this is happening ? A few more hits to isolate the issue are:

The sound appears on all instruments
The noise increases with master volume increase
Amplifier and power supply seems to be ok
The noise appears in head phone also

Can anyone have any idea which section will be causing this issue ? Mine is out of warranty and I have opened it fully and checked. I can't see any physical damage to any components like a burnt resistor or a leaky capacitor. A bit techy thing.
I cannot afford Korg service centre charges. If anyone can give a hint which card might be wrong, I can order and change that card from Korg

Any help is appreciated
Thx

korgich · Post by **korgich** » Sat Apr 10, 2010 12:05 am

Mine started to do the same thing. After hour or two of playing it makes that hissing noise on all voices ROM or RAM, even when not playing at all. I'm looking for my receive to see if i still have the waranty.

sanalc · Post by **sanalc** » Sat Apr 10, 2010 4:50 pm

Thats bad, so its a manufacturing defect ? Korg should look into such issues if such problems come for more people when they sell expensive product

neverkorgagain · Post by **neverkorgagain** » Sat Apr 10, 2010 5:25 pm

it could be 2 things..... ram defect or motherboard in worst case....

hope its just RAM module, i had problem with that few months ago...

Vangelismusic · Post by **Vangelismusic** » Sat Apr 10, 2010 5:25 pm

sanalc does your pitch bend work?

charlie67 · Post by **charlie67** » Mon Apr 12, 2010 10:09 pm

Have you tried the obvious things like re-loading the operating system and resources?

korgich · Post by **korgich** » Mon Apr 12, 2010 11:19 pm

My pitch bend is working fine.
And yes charlie67 i have tried the obvious things like all kinds of reloading and resets. One more thing that i noticed is, that the led on MIC button is flickering when the board is making that noise. I lowered the gain on the inputs but it didn't help.

sanalc · Post by **sanalc** » Tue Apr 27, 2010 10:03 pm

Hi, sorry for late reply. I was busy with work and didn't get time to look into forums. My pitch bend works fine. I have notice only one additional problem. The front USB doesn't work. It detects stick, but doesn't read. But the rear one works fine.
I had reloaded OS to 2.01 after formatting. Still no luck. It could be something before amp. either DA converter or pre amp or anything. Or might be the TC helicon voice processor.
All the voices are working, but with the zzz noise. I couldn't use the keyboard for about 2 months. Korg service centre said they will charge £60 an hour and an inital quote fee of £30 + spare parts. I am sure the parts might be in the range of £200 +. Puretech solutions quoted £75 for service, but they are far for me, Swindon. Cimple Solutions quoted £150 for minor faults and if not they will give quote.
Since many users are having the similar issue, may be many not in the forums, Korg should look into this matter and contact us or replace the product with a non faulty. I have already told many of my friends not to buy Korg again.

wahidw · Post by **wahidw** » Thu May 06, 2010 3:11 pm

mine started to do the same thing. after hour or two of playing it makes that noise.
I don't know what to do?

some1uk03 · Post by **some1uk03** » Thu May 06, 2010 3:57 pm

After you switch on the keyboard, is the sound there automatically?

OR

does it appear after you've pressed a key on the keyboard?

wahidw · Post by **wahidw** » Thu May 06, 2010 4:22 pm

some1uk03 wrote:After you switch on the keyboard, is the sound there automatically?

OR

does it appear after you've pressed a key on the keyboard?

No, when I switch on the keyboard it is working fine after 1 or 2 hour start making noise with playing drums.
Then I have to restart the keyboard.

some1uk03 · Post by **some1uk03** » Thu May 06, 2010 5:08 pm

If its making it after some time.. I think you may be lucky.

Check out my post a while ago... Some Sounds cause Hanging/Freezing/Dont Fade

Once this happens, try pressing... SHIFT + Start/Stop and see if the sound goes away.

wahidw · Post by **wahidw** » Fri May 07, 2010 4:34 pm

some1uk03 wrote:If its making it after some time.. I think you may be lucky.

Check out my post a while ago... Some Sounds cause Hanging/Freezing/Dont Fade

Once this happens, try pressing... SHIFT + Start/Stop and see if the sound goes away.

It it not making some times , when I turn the KB on it is working good for almost one hours then start making noise after that I can not use the keyboard.
But it is doing only with user instruments not with the factory instruments
I load the factory Global ,didn't help if that is a ram problem is it possible we change the ram?
I don't know what to do I can't use this keyboard any moor.

some1uk03 · Post by **some1uk03** » Fri May 07, 2010 5:26 pm

When that happens next time...

TRY this and see if the sound goes away.

PRESS: SHIFT + Start/Stop

wahidw · Post by **wahidw** » Fri May 07, 2010 9:50 pm

Thanks, I did but the noise is still there it is getting worst every day.
I think the 64mb ram or memory got damage some how , because it dose only withe USER Drums and sound.
can I buy ram and change it or not?
Any advice please.
Thanks