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Old 09-14-2017, 10:04 PM   #65
rievax_60
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Default Re: Pioneer VSX-520-K Protection problem

Also check the Base voltages of Q443 and Q444. ZD410 should have about 5v across it. The combined voltage across R531 and R706 should be about 4.4v.
Have you replaced ZD410 with a 5.1v zenner diode? Are R531 and R706 ok?

Last edited by rievax_60; 09-14-2017 at 10:05 PM..
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