"an over current occurred"

YammyFan · May 29, 2018, 09:13:41 AM

Twice in the past,, the notice "an over current occurred" has appeared on my PSR 970. The first time it happened I got really scared. But, thankfully, nothing serious, happened. However, I am keen to avoid doing the wrong thing, in future, and welcome members' comments on this post.

EileenL · May 29, 2018, 02:29:01 PM

Do you mean by Over Current an electrical surge. It is always best with most keyboards to use Anti Surge Plugs.

pjd · May 29, 2018, 04:18:23 PM

Hi --

I'm assuming that the overcurrent message appeared after plugging a device into the USB-A port.

A USB (host or USB-A) port supplies a limited amount of electrical current. The USB hardware detects an attempt to draw more current than allowed and shuts down the port. The overcurrent condition is reported to software, so software can report the condition to the user.

I wouldn't expect any issues (Yamaha are good engineers). However, please take notice of the power hungry USB device and stop using it. Replace it with a less demanding device.

More details would help analysis.

Hope this helps -- pj

MarkF_48 · May 29, 2018, 04:21:18 PM

I did a search in both the owners manual and service manual for any error codes or messages related to 'over current' and found none.
Does the keyboard continue to function or does it stop working and need to be powered off to reset it? When this occurs are you playing through the internal speakers, perhaps set a bit loud (maybe with much bass content) which may take more electrical current?

YammyFan · May 30, 2018, 02:35:53 AM

Thanks MarkF48 , PJD and Eileen.Yes, the incident is definitely related to the USB. I had a USB Hub plugged in.My USB Hub has 4 switches on it. I think sometimes I am a bit impatient switching off one thumb drive in the Hub, and switching on another thumb drive. Fortunately, i have not had to power off, or reset my keyboard. I have made a promise to myself that in future I will slow down. Computers these days, respond so quickly,that I have grown to expect everything to happen instantaneously, and, maybe like us, they need a moment to gather their thoughts, and regroup.

alanclare · May 30, 2018, 09:47:40 AM

I have exactly the same 4-switch hub set-up and I incurred exactly the same set of circumstances just the other day. As you say, I must slow down a bit when switching between usbs.

Alan

YammyFan · May 30, 2018, 12:56:46 PM

I forgot to mention in my first post on this subject that my HUB is plugged into my laptop, and not into the 240 volt power point in our house.

MarkF_48 · May 30, 2018, 03:28:04 PM

Just to clarify a couple things...

- Is the HUB is plugged into and powered by the laptop so the keyboard and perhaps some other devices are connected to the laptop, such as the keyboard is plugged into one of the 4 ports(?)

- I have had my own computer pop up an 'Over Current' message when a USB hub had a problem (HUB was intermittently defective). Was it your laptop that gave the message with the S970 connected to the HUB or was it actually the S970 that gave the 'Over Current' message.

alanclare · May 30, 2018, 06:31:57 PM

No laptops were involved in my instance.

EileenL · May 30, 2018, 07:38:35 PM

I think they only recommend using two USB ports in the S Series.

alanclare · May 30, 2018, 11:05:26 PM

They do. I use a switchable 4-port hub to save unnecessary plugging in and out of memory sticks, I just make sure that no more than two if the usbs are connected to the arranger at any one time.

Alan

Joe H · May 31, 2018, 02:05:55 AM

YammyFan,

You don't need to use a powered USB HUB. A passive HUB will do just fine. I have one of those HUBs with 4 switch Ports on it but there is no power required. The keyboard will supply enough power.

Joe H

YammyFan · May 31, 2018, 02:22:42 AM

Thanks everyone for your posts on this subject. I saw the notice "an overcurrent occurred" appear on my PSR 970 [Not on my laptop]
I'm very, very happy with my usb HUB which gains its power from my PSR 970. I try to always have only one switch on my Hub on at a time.

eddystb · October 21, 2019, 01:41:45 PM

I've got the same problem how can i solve it, please some help

YammyFan · October 21, 2019, 05:32:25 PM

Quote from: Joe H on May 31, 2018, 02:05:55 AM

You don't need to use a powered USB HUB. A passive HUB will do just fine. I have one of those HUBs with 4 switch Ports on it but there is no power required. The keyboard will supply enough power.

Joe H

Well said, Joe. I have been using a non powered 4 way Hub on my PSR 970 and Psr 750 for about 3 years.

eddystb · October 22, 2019, 03:34:22 AM

thank you yammy, but it cant be repaird?

YammyFan · October 22, 2019, 05:25:42 AM

Quote from: eddystb on October 22, 2019, 03:34:22 AM
thank you yammy, but it cant be repaird?

Sorry. I guess I have been lucky. My equipment has suffered no ill effects , even though I have received a message on my PSR saying " an over current occurred" at least 4 times over the last 4 years.

pjd · October 22, 2019, 10:48:19 AM

Quote from: eddystb on October 22, 2019, 03:34:22 AM
thank you yammy, but it cant be repaird?

This message appears when a USB device draws too much electrical current. The USB hardware is designed to detect overcurrent and to tell software about the condition. The hardware/software shut down the USB port in order to prevent damage.

The USB port should be OK, but I wouldn't try to power the offending device (memory, hub, whatever) from the USB port. If you can plug the device into its own AC adapter, that's a good place to start. Otherwise, maybe use a powered USB hub.

Hope this helps -- pj