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dtastudio2
Joined: 03 Nov 2022
Posts: 21
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 Posted: Thu Nov 03, 2022 6:34 am Post subject: Pa5x Screen Ghost Touch Problem. |
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Hi. I have 2 Pa5x and both having ghost touch screen problem like in this video. Has anyone had the same problem?
https://youtu.be/LWva30zh_bk |
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musiccankill
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Joined: 30 May 2010
Posts: 884
Location: Greece
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| Posted: Thu Nov 03, 2022 9:20 pm Post subject: |
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With your other hand touch a (not painted) metal piece of the 5x (best test would be to touch the metal of an audio (TS/TRS) cable plugged on the back) and touch the screen again which touching the metal part (effectively grounding yourself to the same ground)...
I have seen these issues on pa700/1000/4x when the ground on the specific place is not good enough..
_________________
~~~The best keyboard for any player is the one that fits his/her needs!~~~
Korg keyboards owned now: PA5X 61 ,PA300, Triton extreme 61, Korg 707, Trinity plus |
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dtastudio2
Joined: 03 Nov 2022
Posts: 21
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| Posted: Fri Nov 04, 2022 1:28 pm Post subject: |
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| musiccankill wrote: | With your other hand touch a (not painted) metal piece of the 5x (best test would be to touch the metal of an audio (TS/TRS) cable plugged on the back) and touch the screen again which touching the metal part (effectively grounding yourself to the same ground)...
I have seen these issues on pa700/1000/4x when the ground on the specific place is not good enough.. |
Thanks! Yes, when i touch metal piece of the 5x and my other hand touch the screen every thing work fine. |
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sagar ahuja
Joined: 01 May 2012
Posts: 34
Location: Mumbai, India
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| Posted: Fri Nov 04, 2022 5:55 pm Post subject: Re: Pa5x Screen Ghost Touch Problem. |
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| dtastudio2 wrote: | Hi. I have 2 Pa5x and both having ghost touch screen problem like in this video. Has anyone had the same problem?
https://youtu.be/LWva30zh_bk |
Same with me, I bought 2 pa5x and had the same issues on both, eventually I returned both and got a refund. However It took around 3 months to process everything. But thanks to my dealer |
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musiccankill
Platinum Member
Joined: 30 May 2010
Posts: 884
Location: Greece
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| Posted: Fri Nov 04, 2022 6:21 pm Post subject: |
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| dtastudio2 wrote: | | musiccankill wrote: | With your other hand touch a (not painted) metal piece of the 5x (best test would be to touch the metal of an audio (TS/TRS) cable plugged on the back) and touch the screen again which touching the metal part (effectively grounding yourself to the same ground)...
I have seen these issues on pa700/1000/4x when the ground on the specific place is not good enough.. |
Thanks! Yes, when i touch metal piece of the 5x and my other hand touch the screen every thing work fine. |
So it is a power grounding issue as has happen on previous gen to some users.
The only thing you can do to the places that this happens is to ground yourself too.( i wouldn't suggest removing the ground from the keyboard although it should fix the issue if the mixer you have it connected too isn't grounded too )
_________________
~~~The best keyboard for any player is the one that fits his/her needs!~~~
Korg keyboards owned now: PA5X 61 ,PA300, Triton extreme 61, Korg 707, Trinity plus |
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dtastudio2
Joined: 03 Nov 2022
Posts: 21
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| Posted: Sat Nov 05, 2022 8:27 am Post subject: |
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| musiccankill wrote: | | dtastudio2 wrote: | | musiccankill wrote: | With your other hand touch a (not painted) metal piece of the 5x (best test would be to touch the metal of an audio (TS/TRS) cable plugged on the back) and touch the screen again which touching the metal part (effectively grounding yourself to the same ground)...
I have seen these issues on pa700/1000/4x when the ground on the specific place is not good enough.. |
Thanks! Yes, when i touch metal piece of the 5x and my other hand touch the screen every thing work fine. |
So it is a power grounding issue as has happen on previous gen to some users.
The only thing you can do to the places that this happens is to ground yourself too.( i wouldn't suggest removing the ground from the keyboard although it should fix the issue if the mixer you have it connected too isn't grounded too ) |
So the problem is from the electrical, isn't my pa5x faulty? |
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voip
Platinum Member
Joined: 27 Nov 2014
Posts: 3776
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| Posted: Sat Nov 05, 2022 11:19 am Post subject: |
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An electrically noisy environment can affect all touch screens to some extent. Some tend to be more susceptible than others, and environments vary, too. This wouldn't be reason enough to send the Pa5x back.
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musiccankill
Platinum Member
Joined: 30 May 2010
Posts: 884
Location: Greece
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| Posted: Sat Nov 05, 2022 3:10 pm Post subject: |
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No it is not a problem on your pa5x or a technical issue at all.
This is the only positive the older resistive touch panels (pa1x/500/800/2x/300/600/900/3xle/3x) have compared to the new capacitive ones(700/1000/4x/5x).
For me it hasn't been an issue but i have friends that had it happen in specific clubs and only in these so i found out that it was a grounding issue!
_________________
~~~The best keyboard for any player is the one that fits his/her needs!~~~
Korg keyboards owned now: PA5X 61 ,PA300, Triton extreme 61, Korg 707, Trinity plus |
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AntonySharmman
Approved Merchant
Joined: 16 Oct 2010
Posts: 3598
Location: Hellas
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| Posted: Sat Nov 05, 2022 7:06 pm Post subject: |
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| dtastudio2 wrote: |
So the problem is from the electrical, isn't my pa5x faulty? |
Pa5X has capacitance sensitive screen so any alternative surface current will flow from screen to your body if mains housing
grounding is insufficient and this will cause screen values to be altered according to frequency of AC current , nothing new !
You have two ways to explore when this phenomenon will happen for sure.
1) A practical way is to touch lightly the metallic chassis of device and discover the feeling of slight surface electric shock at your
hand's skin especially if you wear non plastic shoes.
2) Use a multi-meter at AC voltage selection , and measure voltage between your hand (better on a metallic object that you hold)
and negative point of rear audio jack of Pa5X or any other audio device in your studio. If you measure over 10 Volts AC then this
will happen to any capacitance screen you use and is connected to mains.
_________________
Music Conductor - Sound Engineer & Developer - Automotive SMPS/RF R&D - Electronics Engineer
PaSeries Demos - WavesArt.eu - KorgPa.gr <> Facebook
Keyboards : Steinway-D, Kronos X, Pa5X 76, Pa4X 76, Montage M7 , Roland-XV88, Emu3,Emax II,Synclavier II,Yamaha DX Series, ΟΒ-8V |
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dtastudio2
Joined: 03 Nov 2022
Posts: 21
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| Posted: Sat Nov 05, 2022 11:48 pm Post subject: |
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| AntonySharmman wrote: | | dtastudio2 wrote: |
So the problem is from the electrical, isn't my pa5x faulty? |
Pa5X has capacitance sensitive screen so any alternative surface current will flow from screen to your body if mains housing
grounding is insufficient and this will cause screen values to be altered according to frequency of AC current , nothing new !
You have two ways to explore when this phenomenon will happen for sure.
1) A practical way is to touch lightly the metallic chassis of device and discover the feeling of slight surface electric shock at your
hand's skin especially if you wear non plastic shoes.
2) Use a multi-meter at AC voltage selection , and measure voltage between your hand (better on a metallic object that you hold)
and negative point of rear audio jack of Pa5X or any other audio device in your studio. If you measure over 10 Volts AC then this
will happen to any capacitance screen you use and is connected to mains. |
Thanks. In my country electricity is usually not grounded. But there are two strange things:
1 is that my Pa5x works properly when I connect it to other electricity somewhere else outside my house, even though that electricity is not grounded.
2 is that it also works properly at my house during the night hours (usually after 11pm to 6am). After that time, the problem occurs again.
So sorry for my bad English! |
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AntonySharmman
Approved Merchant
Joined: 16 Oct 2010
Posts: 3598
Location: Hellas
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| Posted: Sun Nov 06, 2022 12:22 am Post subject: |
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It's a matter of environment humidity and of what kind of shoes you're wearing at that time since you create the ground link
when you touch your device.
You'd better connect your Keyboard & mixer/PA common grounding with an active plumber pipe at your home in order to
reduce this effect and be more safe in generall ...
_________________
Music Conductor - Sound Engineer & Developer - Automotive SMPS/RF R&D - Electronics Engineer
PaSeries Demos - WavesArt.eu - KorgPa.gr <> Facebook
Keyboards : Steinway-D, Kronos X, Pa5X 76, Pa4X 76, Montage M7 , Roland-XV88, Emu3,Emax II,Synclavier II,Yamaha DX Series, ΟΒ-8V |
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dtastudio2
Joined: 03 Nov 2022
Posts: 21
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| Posted: Sun Nov 06, 2022 2:42 am Post subject: |
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| AntonySharmman wrote: | It's a matter of environment humidity and of what kind of shoes you're wearing at that time since you create the ground link
when you touch your device.
You'd better connect your Keyboard & mixer/PA common grounding with an active plumber pipe at your home in order to
reduce this effect and be more safe in generall ... |
Yes. I always take off my shoes before testing my Pa5x at my house and outside (at my neighbor's house), electricity in both places are not grounded. I feel the leakage current when touching the metal case of pa5x in both places but only at my house the ghost touch problem occurs, everything works fine at my neighbor's house. At my house the problem go away after 11pm and comes back around 6am the next morning. So the problem is with the humidity of my house environment and the electricity noise? |
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voip
Platinum Member
Joined: 27 Nov 2014
Posts: 3776
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| Posted: Sun Nov 06, 2022 10:27 am Post subject: |
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So it might be something like a heating system, or a rogue lightbulb, causing sufficient interference to make the problem appear. If there is nothing in the house that comes on at 6am and off at 11pm, could it be something in a neighbouring property? Is there a neon sign nearby, that stays on between those hours?
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dtastudio2
Joined: 03 Nov 2022
Posts: 21
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| Posted: Sun Nov 06, 2022 4:49 pm Post subject: |
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| voip wrote: | If there is nothing in the house that comes on at 6am and off at 11pm, could it be something in a neighbouring property? Is there a neon sign nearby, that stays on between those hours?
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Yes. Nothing in my house that comes on at 6am and off at 11pm. I have tried using isolation transformer and power filter to fix electricity noise but still can't fix the touch problem. |
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musiccankill
Platinum Member
Joined: 30 May 2010
Posts: 884
Location: Greece
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| Posted: Sun Nov 06, 2022 5:05 pm Post subject: |
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| dtastudio2 wrote: | | voip wrote: | If there is nothing in the house that comes on at 6am and off at 11pm, could it be something in a neighbouring property? Is there a neon sign nearby, that stays on between those hours?
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Yes. Nothing in my house that comes on at 6am and off at 11pm. I have tried using isolation transformer and power filter to fix electricity noise but still can't fix the touch problem. |
That is really strange! Could it be a road light outside?
If you have a UPS when it started, remove the mains from the UPS so the PA5X to be disconnected entirely from any external sources (keep only headphones (not connected to other devices like a mixer etc) and the power connection to the UPS) to see if it ll continue reacting like that!
_________________
~~~The best keyboard for any player is the one that fits his/her needs!~~~
Korg keyboards owned now: PA5X 61 ,PA300, Triton extreme 61, Korg 707, Trinity plus |
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