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[Amps] TL922 failure

To: Amps reflector <>
Subject: [Amps] TL922 failure
From: Victor Rosenthal 4X6GP <>
Date: Fri, 13 May 2022 10:02:22 +0300
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After about 10 years of almost daily use, my TL922 has failed.
When I turn it on, the GFI for my radio room immediately -- instantly -- pops.

An ohmmeter from either line pin on the power plug to the ground pin shows a resistance of 1.2k. I presume that explains the GFI's reaction! The resistance across the line pins (it is wired for 230v) is 27 ohms, which I think is normal.

The schematic shows a couple of 470pf capacitors from line to ground. It looks like it's either this or the transformer.

I haven't removed the amp from my desk and opened it yet, but does anyone have an experience with a similar problem?
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
CWops no. 5
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