Snes mini power scematic

I have an snes mini i bought on ebay! It was sold as is.

When i plug it in and turn it on i get nothing.

I was testing if it got any power and on the Voltage regulator it only gets 0v on the left pad and on the right pad 0v.
I changed voltage regulator from a working unit but i get the same results?
Im using an working original powersupply.


I dont even get power to the regulator?

There is no Continuity between these spots.http://www.ladda-upp.se/bilder/tulhofrnqqntjk/

So where is the rail broken? anyone who knows the way the power goes?

 

Test the fuse

 

i got Continuity at the fuse

 

When you took continuity measurement in your picture, was the power switch on?

If yes, you could have a faulty power switch.

 

no the power wasnt on when i tested the fuse

 

Ofcourse the power was on!

 

when i got the unit there was rust around the power switsh so i bridged it so its always on but the power comes in bto the regulator efore it reach the power switsh right?

 

No, power goes into regulator when switch is on. With switch off you have no continuity between points on your first pic.

Sounds like your switch is the issue.

 

thats correct but i have the power on, and i have power thru the fuse and the black little chip between the fuse, i mean the on off switsh is faar fron this right?

 

I dont know if its a language issue or something, but you are not listening to what I say.

The fuse comes before the switch. It sounds like the switch itself, your bypass of the switch or traces/components in the switch area are your problem.

 

Here is a photo of the switch http://www.ladda-upp.se/bilder/ushexiyjwqgomo/

 

Ok, looks like vias are damaged and would explain the issue.

https://dl.dropboxusercontent.com/u/28488139/b176477.jpg

You need to scrap off soldermask on those 2 traces around the vias (holes). then on the otherside, do the same. Then put some wire down the holes and solder to traces on both sides of the motherboard.

Once you have done that, do this test again:
http://www.ladda-upp.se/bilder/tulhofrnqqntjk/

 

i got contuniety between the 6 holes and this spot http://www.ladda-upp.se/bilder/ftcmzngwectzv/

 

I did not say to do that. Obviously you will get continuity there.

Those holes go through the PCB to the otherside. That is where you are missing continuity

 

can you mark where i shall solder it please?

 

The points I circled, look on back of the PCB. Will also be 6 holes (2x 3 holes). You need to put wire down the holes and solder to both sides of the PCB.

 

I think i understand, so i just make a new route from upside holes to underside holes on same spot on the motherboard?

 

correct

 

I have tested with multimeter it seems like one row with holes have a broken trace How did you suspect that this was the problem?
Thanks

 

You need to repair both rows. They have 3 how's to allow more current to flow. Both rows are damaged, even if you have continuity they both still need repairing to allow enough current to flow. You can just put wire into all 6 holes and solder both sides of the pcb to repair it.