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Unit has been on for hours. Voltage across R12 rolled up from zero to 330mV on cold startup and has not gone higher or varied in any significant way since then. Unit is currently working.
This is what has been so infuriating about this. Over the past 3 days, it has performed normally over many hours, then, this morning, it's messed up. Now it's working again. There's a ghost in this machine. How am I going to diagnose an issue that springs up spontaneously and infrequently? I can't do it by ongoing monitoring. I guess at some point, I'll need to connect leads to the 723 pins and measure voltages as Penthode has suggested to figure out what's going on or at least, get closer to an answer.
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05-02-2025, 07:15 PM
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