Identifying SMD Caps

[Jocbe]

Hey,

My Samsung 305t has started making problems so I'm now about to recap all its boards. Due to my very little experience, I'm having some trouble identifying the SMD caps I need for the logic board, though.

The capacitors have the following labels:
V0033 100 25T
671D 10 50V
V1444 100 16J
67G 220 16V
84151 82 16FA
677FK 100 35V

I assume these simply mean e.g. 100uF, 25V in the first case - is that correct? I'm even less sure about e.g. the penultimate one in the list (I've also attached a photo of the board, if that helps).

This seems like something that should be very obvious / easy to find something explaining how the labeling works, so sorry if it's just my inability to find the right resources!

Any pointers would greatly help! Thank you!

Jocbe

[kasfamily]

Re: Identifying SMD Caps

The second line is the capacity uF. The third line is voltage Volts

[mariushm]

Re: Identifying SMD Caps

They're all electrolytic capacitors, nothing special, low esr but don't have to go out of your way to get the best low esr capacitors.

Yes, all except those with green text are like they say.. 100uF 25v , 10uF 50v, 100uF 16v and so on. That logo on the capacitors belongs to Samyoung so if you really want to you could look up in their datasheets to see exactly to which series the code coresponds to.

The capacitors with green text are a bit weird... 82 would mean 82 uF which is not a standard value and the capacitors are too big to be just 82 uF.
I would think they're 820 uF, but then the normal notation would have been 821 ... 82 followed by 1 zero.
However, they're a bit too small size wize to be 820uF.

Anyway, if you look where they are positioned, you can see they're just some capacitors used to smooth out the 5v going to the usb jacks, so pretty much anything above around 470uF and 10v would be fine.

If you want, you can use regular capacitors with regular leads, just bend them and cut them to proper length and solder them in place

[kasfamily]

Re: Identifying SMD Caps

82 uF 16V may be https://cdn.badcaps-static.com/pdfs/...3639f8fd0f.pdf

[Jocbe]

Re: Identifying SMD Caps

Great, thanks, that helps a lot! I'll try it with a couple of 470uF caps for the green ones then.

Just found one more thing - this time on the inverter board. It has six 220uF 35V caps on it (datasheet: https://cdn.badcaps-static.com/pdfs/...f0755cf592.pdf ). Do you think the following would be an adequate replacement? http://uk.farnell.com/rubycon/35zlj2...rad/dp/1831280 (datasheet: https://cdn.badcaps-static.com/pdfs/...78e8c91d76.pdf ).

Many Thanks!

[mariushm]

Re: Identifying SMD Caps

Yes, they're suitable replacements. Only possible issue would be difference in length, about 12mm vs 16mm for the new ones, but it looks like there's enough room there to not cause you problems.

[Jocbe]

Re: Identifying SMD Caps

Yea, I think there should be plenty space for the slighter longer caps.

Awesome, thanks for all the help! Will go about ordering now & hopefully it turns out the problem is just bad caps.