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Re: New QMX+ Calibration victim

 

Hi Stan,

Thanks, You were right. Lifting input legs of IC503 cleaned up the output from IC501/502. So new order to Mouser... :-)

Regards, Jonas


Den ons 21 maj 2025 kl 01:36 skrev Stan Dye via <standye=[email protected]>:

Jonas,
It is very uncommon for IC501/IC502 to fail, but quite common for IC503 to fail with blown finals.
So I would first lift a leg of IC503 that connects to the output of IC501 or IC502, and make sure it is not some failure in IC503 that causes the IC501/IC502 outputs to look bad.? Failures in ICs can affect their inputs as well as their outputs.
Stan KC7XE_
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