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[Amps] SB-220 Harbach meter board - blown meter diodes

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Subject: [Amps] SB-220 Harbach meter board - blown meter diodes
From: Catherine James <>
Reply-to: Catherine James <>
Date: Mon, 24 Oct 2016 23:45:38 +0000 (UTC)
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In the continuing saga of the "new" SB-220...

I've opened everything up and it looks good to me.  No burned spots, signs of 
arcing, etc.  A previous owner has already installed the Harbach soft-key and 
soft-start mods as well as the Harbach meter diode board, and it was clearly 
done a long time ago since the PC boards are not the modern green type.

I have replaced the PS capacitors via the new Harbach board.

Unfortunately, it appears that D5 and D6 on the Harbach meter board are blown 
(shorted). The long string of 1N5408's check out fine.

Any thoughts on what else I should check or replace that may have been taken 
out when the meter diodes went?

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