Olimex Support Forum

OLinuXino Android / Linux boards and System On Modules => RT5350F => Topic started by: NachoV on February 18, 2021, 05:01:03 pm

Title: 12V instead of 5V
Post by: NachoV on February 18, 2021, 05:01:03 pm
Hello

Hypothetically, if grabbed the wrong power adapter and applied 12V instead of 5V, just how bad is that? If after mistake not detected burn marks, is there any chance the chip is working?
Thanks... 
Title: Re: 12V instead of 5V
Post by: LubOlimex on February 19, 2021, 09:13:39 am
How long was it applied? If it was for more than a couple of seconds, some hardware damage is expected. The main chip is probably operational but parts of the powering circuit would need to be replaced.

Refer to the schematic and follow the path of power - starting from the power jack and moving towards the regulators.
Title: Re: 12V instead of 5V
Post by: NachoV on February 19, 2021, 10:29:31 am
Quote from: LubOlimex on February 19, 2021, 09:13:39 amHow long was it applied? If it was for more than a couple of seconds, some router setup (http://"https://routersetup.pro/") hardware damage is expected. The main chip is probably operational but parts of the powering circuit would need to be replaced.

Refer to the schematic and follow the path of power - starting from the power jack and moving towards the regulators.

about 10-15 seconds.I will try to check consistently, but judging by your answer, problems are inevitable :)
Thanks
Title: Re: 12V instead of 5V
Post by: LubOlimex on February 19, 2021, 04:50:09 pm
Do you have RT5350F-OLinuXino-EVB?
Title: Re: 12V instead of 5V
Post by: NachoV on February 20, 2021, 09:08:01 am
Yes, RT5350F-OLinuXino
Title: Re: 12V instead of 5V
Post by: vtsvetkov on February 20, 2021, 05:13:50 pm
When I did this exact same thing, it damaged the voltage regulator. After replacing it the board worked as before.
Title: Re: 12V instead of 5V
Post by: NachoV on February 21, 2021, 10:10:55 am
Quote from: vtsvetkov on February 20, 2021, 05:13:50 pmWhen I did this exact same thing, it damaged the voltage regulator. After replacing it the board worked as before.

checked already - the same thing, the voltage regulator does not work :)
Thanks
Title: Re: 12V instead of 5V
Post by: LubOlimex on February 22, 2021, 01:01:55 pm
So you identified the faulty component? Let us know if it works when you replace it.