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Threshold 400A. L/R Channel out and fix

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When i first opened for visual, no supply fuse. Toasted resistor divider which goes to lower 4 A6 pnp devices. Did a quick continuity check looking for CE shorts on A6s. Found 3 with BC
Shorts. As show in pic I proceeded to pull all 4 outputs. 3 have passed. The single survivor was limping along with ~ 2 mA
Of Collector leakage. He will be retired as well.
Cause or effect? Don’t quite know yet.
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Pic of backside. Rated E for everyone...

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