02-04-2022 11:10 AM - edited 02-04-2022 11:26 AM
Hello, I hope someone may have an answer for me, I have a rebel T3 and I would like to connect it to my computer and a power adaptor at the same time, to do so I have connected the USB to the computer and have the ACK-10 power adaptor in place of my battery. When the adaptor is connected my camera works fine and is powered up, however when I plug in the USB to my computer the camera acts like it has a loose connection and powers on and off with the computer connection sound connecting and disconnecting over and over until it just stops and does nothing until I disconnect the usb cable and it works fine again. On the other end of the scale It also works fine on the computer if I have the Battery in use instead of the adaptor. I have turned off the auto power in the camera menu to try to fix it but to no avail. Any ideas? Thanks in advance.
02-04-2022 11:25 AM
What you are describing are classic symptoms of a ground loop. The fault lies with either the USB port on the computer, or the power adapter. Are using all Canon gear for the power adapter?
If you are using a laptop, then unplug its power adapter.
02-04-2022 04:03 PM
Does your ACK-10 plug into a USB port? That might not provide enough power to the camera.
02-04-2022 05:29 PM
Its a wall socket adaptor, I was going to switch to a usb to see if it made any difference.
02-05-2022 12:56 PM
Then you have a ground loop. Try reversing the plug in the socket.
02-13-2022 01:02 AM
A ground loop seems unlikely as such a thing as far as I understand pertains mostly to acoustic and sound devices. But... I reversed the plug, I tried different sockets and grounded space bars. So i ordered and recieved another power cord with a USB plug instead of a socket, to no avail, same issue...then I thought perhaps the usb to the computer was powering and/or charging the battery so I put the regular battery back in but nope...the battery died. I am at a loss.
03-30-2022 02:19 PM
So it looks like the issue was that the Camera was confused by trying to draw power from 2 different sources. I put a small piece of tape over one of the USB pins connecting it to my computer so it only transmits data and not power. That did the trick. 🙂
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