e-licktronic Forum

Can any body tell me if this is the correct power supply?

https://www.poweradaptorsuk.co.uk/1000m ... 0015ac.htm

I have this unit and have connected it to test the power board of my Nava9 but the readings aren't correct. I get -20v on the -15v pin, and then nothing on the two positives. Is there anything i should be looking out for?

I am also looking to test the main board after soldering the noise resistors and capacitors before doing the IC, but i'm getting nothing at all. Do i need to connect the ground of the multimeter in order for it to read power on the main board?

Any help would be appreciated. Thanks

That PSU looks fine. I wouldn't connect the main board until you sort the power section.

Would suggest you have a wrong component or missing / bad part in there. Check the pins of the VRs. All electrolytics the right way round etc.

orbist wrote:That PSU looks fine. I wouldn't connect the main board until you sort the power section.

Would suggest you have a wrong component or missing / bad part in there. Check the pins of the VRs. All electrolytics the right way round etc.

Thanks for getting back to me on this. All pins and components look the right way around. Any idea where i can look for help?

cstockwell wrote: Thanks for getting back to me on this. All pins and components look the right way around. Any idea where i can look for help?

You have to set your multimeter between ground and the power rail you want to mesure
http://www.e-licktronic.com/img/cms/Nava%20tuto%20montage/power%20supply/nava%20TR%20909%20clone%20PSU%20test%20+15v.jpg

I tested again yesterday and all seemed to work fine. However i have checked again today and i cant get the -15v or +5v.

I previously found a post which i can't find again, but some people have mentioned something about using a resistor to get one of the capacitors going (this could be incorrect but there was something that could be done to help charge capacitors for the first time). And this then helps all readings display correctly? Any ideas what that be?

I just can't work out why the readings would be find yesterday but today they are not.