View Single Post
Old 09-14-2017, 09:04 PM   #65
Badcaps Veteran
Join Date: May 2012
City & State: mackay
My Country: australia
Line Voltage: 240
I'm a: Hobbyist Tech
Posts: 893
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 09:05 PM..
rievax_60 is offline   Reply With Quote