Question Wondering what this potentiometer controls on this board, Its a Mean Well LOP-500-27 without variable voltage.

[reaper89971]

https://imgur.com/G6HTB1L

View: https://imgur.com/G6HTB1L


I am wondering what this potentiometer controls on the board. I suspect it controls the power supply fan because for some reason when i plug a .37 amp fan into the board the fan won't turn on. It is suppost to support a .5amp fan.

Anyone have any experience with this power supply and maybe would know what this device on the board controls.

 

[helpstar]

if you don´t know it, leave it, replace it. Too dangerous to adjust while hot wired, if you don´t know what you are doing.

what´s the naming of the connector beside and the potentiometer on the board?

Most likely the fan spin rate, voltage to the fan will be controlled by it. is the voltage rating of the fans identical?

 

[reaper89971]

if you don´t know it, leave it, replace it. Too dangerous to adjust while hot wired, if you don´t know what you are doing.

what´s the naming of the connector beside and the potentiometer on the board?

Most likely the fan spin rate, voltage to the fan will be controlled by it. is the voltage rating of the fans identical?

https://www.meanwell.com/webapp/product/search.aspx?prod=LOP-500

The connector beside the Potentiometer is a function connector of some kind. I don't know what goes there. There is a name for the connector but not for what plugs into it. This is the name of the connector:

Function Connector(CN3): TKP DH2I-2X2 or equivalent

The fan i plugged in is 12v .37 amps but its just ticks and won't turn on. The fan made for it is 12v 0.08 amps or 0.12 amps. But it is suppost to go up to 0.5 amps. I used a fan under .5 amps but it wont work. The pdf says something about .02 amps without a fan but doesn't tell you how to set this power supply to use a fan.

It says that it runs at 320 watts without fan. But with a fan it will run at 500 watts. But there is no switch so maybe the Potentiometer turns up the wattage or amperage or something.

Im going to buy an amperage tester and hook that to the power supply and see what amperage it is at. I want to know if i am getting 320 watts or 500 watts.

There pdf is pretty useless in my opinion the diagrams don't match my board

 

[reaper89971]

if you don´t know it, leave it, replace it. Too dangerous to adjust while hot wired, if you don´t know what you are doing.

what´s the naming of the connector beside and the potentiometer on the board?

Most likely the fan spin rate, voltage to the fan will be controlled by it. is the voltage rating of the fans identical?

https://www.bourns.com/docs/Product-Datasheets/3362.pdf

I found the pdf on the trimmer it only adjust 0.5 watts so that cant be the actual power supply trimmer. It must be for the fan for sure. Or at least that is what the pdf above suggest

take a look at the above pdf and tell me if i am wrong. It says it adjust 10% or .5 watts

 

[ex_bubblehead]

You are bound and determined to earn that Darwin Award aren't you? This is NOT something that you as an amateur should even be involved with. Obtain the services of a professional. Either that or have both the Fire Department and EMS on speed dial.