This device's default output voltage is set to 12v and I am finding it difficult to set it to 8 volts. I need help to set it to 8 volts.

 

Place a blob of Solder between the 2 points at location "B".
Done.
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.
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Hi,
As per LowQ.
E

 

DontFila: Doesnt it mean You made the picture demandes solderings and it not helped??

 

DontFila: Doesnt it mean You made the picture demandes solderings and it not helped??

I don't understand what you mean.

 

Hi,
As per LowQ.
E
View attachment 310563

There is a capacitor at the B connector but only one side is connected and the other is not connected. So how should I go by doing it.

 

Hi Don,
Have you tried soldering the two small pads together on the 'B' point? ?

It is possible the PCB is multilayer, so some copper tracks may not be visible.

E

 

I think the thing that you are calling a capacitor is a zero ohm resistor. Both ends of it should be soldered to the pads. The one in position A should be removed.
If item A has been removed and item B is only soldered at one end I expect the output to be 5 volts. Is that the output voltage you are getting ?

Les.

 

Try this:
Measures the 12V_AB two points, if they are shorted then cut off, and connected 8V_AB two points together.

 

Hi Don,
Have you tried soldering the two small pads together on the 'B' point? ?

It is possible the PCB is multilayer, so some copper tracks may not be visible.

E

YES

 

View attachment 310569
Try this:
Measures the 12V_AB two points, if they are shorted then cut off, and connected 8V_AB two points.

It is showing 9v output even when I didn't connect the AB of the 8v. Also when I connect the AB of the 8v pad it's still showing 9v output.

Before purchasing I read the description and they said it is default set to 12v but when I supplied the input 3.7v it got 9v output. Anyway, I haven't used it before this is my first time using it.

 

It is showing 9v output even when I didn't connect the AB of the 8v. Also when I connect the AB of the 8v pad it's still showing 9v output.

Then you can measure those four sets of pads to make sure which set is shorted.

 

I think the thing that you are calling a capacitor is a zero ohm resistor. Both ends of it should be soldered to the pads. The one in position A should be removed.
If item A has been removed and item B is only soldered at one end I expect the output to be 5 volts. Is that the output voltage you are getting ?

Les.

At default, it outputs 9v but that is not what I saw before purchasing it. They said it can convert 3.7v to 12v and it can also be set to 5, 9, and 9.

I will the try the one in the picture provided if it will work.

 

Ok

Then you can measure those four sets of pads to make sure which set is shorted.

Ok, I will try that to see if it will work.

 

The jumper on B should be in place and soldered both sides. The jumper on A should be removed, lest it make contact and change the voltage to 12V.

It looks like they put both jumpers in place but soldered only one side of each. I suspect the B jumper was making contact without being soldered, giving you the 9V output.