The capacitor underneath the lower RF shield

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cheshirenoir
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The capacitor underneath the lower RF shield

Post by cheshirenoir » Wed Feb 09, 2022 4:01 am

Hey Folks,
I'm replacing the regulators on my Wizzard (Revision 700319) and as I removed that horrible lower RF shield, I noticed a capacitor underneath. It's popped it's guts. I know it was connected across two pins of the 12V regulator. Which two pins? I think it was 1 and 2 of the 7812, but I just want to double check. It's a 4.7uF electrolytic, 25v, and it doesn't appear to be in the schematic.

Any help gratefully accepted.

Chesh

PS There is no way I'm putting that RF Shield back on.
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Scouter3d
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Re: The capacitor underneath the lower RF shield

Post by Scouter3d » Wed Feb 09, 2022 7:03 am

Hi Chesh,

on my MKII it is located between pin 1(Vin) and 2(GND) ... see pic...

Cheers, TOM:0)
20220209_075724.jpg
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cheshirenoir
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Re: The capacitor underneath the lower RF shield

Post by cheshirenoir » Wed Feb 09, 2022 7:24 am

Thanks!
I got it right then :-)

Cheers!

Chesh
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cheshirenoir
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Re: The capacitor underneath the lower RF shield

Post by cheshirenoir » Wed Feb 09, 2022 7:44 am

Just tested it and she's good to go. I did tack some connections to the various ground planes where the lower RF shield would have been, just to make sure the ground planes are properly connected. Probably overkill, but can't make things worse :-D

Thanks again, Scouter3D!

Chesh
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Scouter3d
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Re: The capacitor underneath the lower RF shield

Post by Scouter3d » Wed Feb 09, 2022 7:53 am

you´re welcome :0) TOM:0)
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