Hi all;
I found this forum from this thread; https://www.badcaps.net/forum/showth...&highlight=PRY
And I have a unique issue that I hope some experts on here might know about - but with similar 'design' to the thread above.
My Yamaha RX-V861 will not turn on "once it's flat" (I think a cap discharge?). But if I manually power up the relay on the power PCB, the entire amp comes alive and works perfectly. From there, I can turn it off and on again as much as I like, providing I turn it on within about 3-4 seconds of turning it off. Past this time, it's "flat" and I need to manually trigger that relay.
Research and poking with a multi has found the PRY signal works fine when the amp "isn't flat", but the PDET signal is the one going flat per say. While it's running normally, turning it on/off that signal changes from 0V to 5.1V no issues, but if I leave it "go flat" that PDET signal drops to ~2-3V and fluctuates a lot, and the amp never comes back on.
Does anyone know where these PDET and PRY signals come from? (the microprocessor or something else). I have the service manual / circuit diagrams, but I can't work out it's design and behavior off paper.
Lastly the Config menu I can access, change menus and sub menus, but I can't actually select / change anything? I've pushed every button, nothing actually changes.
I've downloaded the service manual and it mentions nothing about "selecting" a menu item, just initial access and navigation.
Thanks, hope to hear from anyone what maybe still familiar with these older amps...
I found this forum from this thread; https://www.badcaps.net/forum/showth...&highlight=PRY
And I have a unique issue that I hope some experts on here might know about - but with similar 'design' to the thread above.
My Yamaha RX-V861 will not turn on "once it's flat" (I think a cap discharge?). But if I manually power up the relay on the power PCB, the entire amp comes alive and works perfectly. From there, I can turn it off and on again as much as I like, providing I turn it on within about 3-4 seconds of turning it off. Past this time, it's "flat" and I need to manually trigger that relay.
Research and poking with a multi has found the PRY signal works fine when the amp "isn't flat", but the PDET signal is the one going flat per say. While it's running normally, turning it on/off that signal changes from 0V to 5.1V no issues, but if I leave it "go flat" that PDET signal drops to ~2-3V and fluctuates a lot, and the amp never comes back on.
Does anyone know where these PDET and PRY signals come from? (the microprocessor or something else). I have the service manual / circuit diagrams, but I can't work out it's design and behavior off paper.
Lastly the Config menu I can access, change menus and sub menus, but I can't actually select / change anything? I've pushed every button, nothing actually changes.
I've downloaded the service manual and it mentions nothing about "selecting" a menu item, just initial access and navigation.
Thanks, hope to hear from anyone what maybe still familiar with these older amps...
Comment