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Old 14th April 2012, 04:26 PM   #1
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Default Need help to fit caps on PCB

I'm trying to fit these BC Components caps onto BrianGT's PSU board but the 'pinout' on the caps are... well, weird. Not a single pin fit a single hole on the PCB. Any suggestions?

Oh, and is only pin 5 negative and the rest positive?
Attached Images
File Type: jpg BC1.jpg (30.9 KB, 78 views)
File Type: jpg BC2.jpg (71.4 KB, 78 views)
File Type: jpg BC3.jpg (143.4 KB, 77 views)
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Old 14th April 2012, 05:45 PM   #2
DF96 is offline DF96  England
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It says pin 1 is 15000uF (+?) and pin 5 is -. That could mean that the other pins are for mechanical support only. Others may know - I have never tried to mount a big cap on a PCB.
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Old 17th April 2012, 03:00 PM   #3
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Ah, thanks, I didn't even see that one. Anyone else having any ideas? I really don't feel like drilling the board and I need to find out if the other pins (2-4) actually do anything other than being there for support only, before I start to mess with things.
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Old 17th April 2012, 03:23 PM   #4
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Check with a DMM to see if any of the other pins are connected to Pins 1 or 5.
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Old 17th April 2012, 03:28 PM   #5
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If you don't want to re-drill the PCB, then you will have to fit the caps remotely.

Easiest way is to mount the caps on a standalone platform above the PCB and just connect +VE and -VE to the PCB using heavy gauge wire.

Even tidier to mount the caps with the pind pointing down and just make short legs to meet the holes.
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Last edited by KatieandDad; 17th April 2012 at 03:40 PM.
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Old 17th April 2012, 03:31 PM   #6
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Quote:
Originally Posted by KatieandDad View Post
Check with a DMM to see if any of the other pins are connected to Pins 1 or 5.
Okay, I checked using the continuity function and between pin 1 and pin 5 there's something going on, but absolutely nothing between any other pin. That should mean pin 2-4 are for support only, right?

But what about the PCB, should I drill holes for the supporting pins (and the live ones for that matter) or should I cut them off?
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Old 17th April 2012, 03:35 PM   #7
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If the pins 1 and 5 fit the holes on the board then you can just cut off the others.

I would make a little rubber (or similar) cushion to both make sure that nothing remaining of the pins touches the board and gives the cap a solid base to sit on so that it cant move.
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Old 17th April 2012, 03:38 PM   #8
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Originally Posted by KatieandDad View Post
If the pins 1 and 5 fit the holes on the board then you can just cut off the others.

I would make a little rubber (or similar) cushion to both make sure that nothing remaining of the pins touches the board and gives the cap a solid base to sit on so that it cant move.
That's a very good idea, thanks for the help.
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Old 17th April 2012, 06:11 PM   #9
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Groovy

Again, thanks for the help, it turned out great and I used the other pins as support by drilling new holes and simply soldered them into place. The support pins are completely inert.
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