I found the bad cap, looking at replacements

[kaboom]

Re: I found the bad cap, looking at replacements

Here ya go.



The EGC and "Vo-" go to the same point on the PCB.

[evilkitty]

Re: I found the bad cap, looking at replacements

Well that makes it much simpler, just connect earth ground to dc ground
Can i use the empty hole labeled - at the lower right of the transformer, that point is connected to Vo- on the bottom of the board and is amount 1cm of track from the transfomer's pin and i could solder jump and be right on it, or does it need to be closer to the caps

At the bottom there are are two 5% 210 Ohm resistors, it is labeled C8 and C7
i think C mean cap, so what is going on there?

both of the tan disk caps are labeled 104
the green one is labeled 3A222
i can not read the blue one right now, but line one says JNC and line 2 reads JNT02N (need a magnifying glass to read the diagram/symbols on it)

[sam_sam_sam]

Re: I found the bad cap, looking at replacements

From quickly looking at the data sheet this might not be a bad power supply after all
But I would recap it for sure and not over load it

Here is the data sheet for the IC chip RM6203

https://cdn.badcaps-static.com/pdfs/...02a50b81a2.pdf

Here is the data sheet for that IC chip RM6206

You have scroll all the way to bottom of the page to find the PDF file to open it



Can you please take a photo of the back side of board like you did the front side thanks

“Can i use the empty hole labeled - at the lower right of the transformer, that point is connected to Vo- on the bottom of the board “

That depends on what is all going to that pad if just a capacitor or capacitors then I would say maybe because I have seen this done in other power supply before but I would want anyone with more experience than me have the final word on this (if someone comments on this I will start a new post with a photo of some


One note on switching power supply is that some real cheap one or real low amp power supply
They do not seem to have a switching power supply IC chip or least I can not find one one the board WHAT is up with that

[evilkitty]

Re: I found the bad cap, looking at replacements

Sorry it is a little blurry, my camera's autofocus is as crappy as those junk 470uf caps

i flipped to keep the parts in the same relative location on the image and added a few labels to it for reference

thew middle pin of U3 is connected to ground next to the empty - pin hole
there is also a resistor there that connects the middle pin to another pin on U3, from there there is one more resistor that connects it to Vo+, i believe this is how the 6206 (U1) monitors the output voltage via the optic isolator or is that vise versa?

What is the part between the 470uf caps labled L1, by the Vo+ hole called?

[kaboom]

Re: I found the bad cap, looking at replacements

Can i use the empty hole labeled - at the lower right of the transformer, that point is connected to Vo-

You can use that.

L1's a small choke, from the + terminal of C5 to + terminal of C6. You have a C-L-C output filter.

[evilkitty]

Re: I found the bad cap, looking at replacements

Thanks, now i will have a poweradaper that is not a pos
now before i buy the parts i need a few other caps, and maybe a regulator (i do not want to pat shipping twice)
*to be discussed in another tread/topic