zepus169
Newbie level 5
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taking a very long time until possible to switch ON again. Or happens during playing back of second or third audio track.
it was long time not tested, it did not start even once on my tests.
Voltage on pin 2 (VCC) of IC502 jumps from 12 to 15Vdc almost once/second
More likely it is in hiccup mode, trying to start, failing and retrying again.Voltage on pin 2 (VCC) of IC502 jumps from 12 to 15Vdc almost once/second
Does this happen repeatedly? It sounds as though it's a test procedure. Except that something is wrong, therefore it repeats again and again?
This also sounds liek it to me....you are reporting HV DC Bus going from 229 to 339 so something is loading that down...as you have a biy 'lytic cap on that rail.This doesn't sound like a thermal problem to me, either something is overloading the output and causing it to shut down or more likely it isn't able to produce enough output power, tries to ramp up the output and then gives up. I would certainly target the capacitors first.
During my last testing today, did not know how, but unit started for a few minutes
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