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Old 10-12-2019, 02:02 AM   #1
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Flickering lights USB port

I have a 2019 Salem 31KQBTS with factory installed USB ports throughout the trailer. I've noticed when I plug a phone in to charge the led lights in the trailer start to flicker. Has anyone experienced this same issue? Are the USB ports junk and need to be upgraded? I am currently connected to shore power I couldn't imagine charging a phone to cause this much disturbance in the 12v system.
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Old 10-12-2019, 07:24 AM   #2
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Does this happen with any of the usb ports or just the one you use for your phone? If just one I would say pull the receptacle and check the connections.
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Old 10-12-2019, 10:12 AM   #3
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It happens with multiple outlets.
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Old 10-12-2019, 10:23 AM   #4
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I'm really wondering on this one. Is it the frequency from the usb when operating doing the interference or is it the 12V power. You might install a quality usb in one of the receptacles and see if that solves the problem if not I think I would start at the source (converter) and ensure all 12V connections are tight. This is an interesting problem let the forum know what you discover and correct good luck
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Old 10-12-2019, 10:42 AM   #5
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The plant I work at has a variety of meters and oscilloscopes I will see if it's something simple otherwise I'll move onto using that equipment.
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Old 10-12-2019, 11:02 AM   #6
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let the forum know what you find out so others might benefit.
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Old 10-12-2019, 01:55 PM   #7
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I have noticed that often when charging a phone in USB ports throughout my Isata 4, my TV's experience an interference. If I disconnect phone from charging, interference goes away!!
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Old 10-12-2019, 02:53 PM   #8
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I too experience this 'flickering lights' in my 2019 FSX260RT !
I noted it at the first warrantee service, and they said it was the battery!?!?!?!
They changed the battery out and it still happens. Seems to only happen when we use the usb charging ports in the bedroom…so we just use others to charge.
I don’t think it’s worth the aggravation to take it in again for warrantee…they Seem to know less about the darn thing than I do…

Let me know if you find the cause or a concern while investigating!
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Old 10-12-2019, 03:05 PM   #9
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If you have an Android phone, get an app like Ampere and you can see how much charge is going into your phone.

https://play.google.com/store/apps/d...mpere&hl=en_US

Personally, I would just change the USB charge ports that came with the camper to better ones. These are the ones I use. They can deliver up to 4.8A total for the pair of outlets.

https://shop.pkys.com/Blue-Sea-1045-...er_p_4757.html
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Old 10-12-2019, 05:01 PM   #10
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Will do when I get back home this week and have some to check it over.
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