Hi,
My receiver has started to power off after 2-3 hours of use. Restarting it will give me progressively less time (10-20 minutes) so I assume it's some sort of heat protection. Removing the cover doesn't reveal any dustbunnys or scorch marks
Any other Yamaha power down threads I've seen so far talk about immediate shutdown or coinciding with a volume increases which doesn't seem to be my situation. The diagnostics menus don't quite match the service manual I found, 20.1 thru 20.4 all say "I PRT". A 457 service manual says that means excessive current so bad power supply?
Any suggestions?
Thanks,
My receiver has started to power off after 2-3 hours of use. Restarting it will give me progressively less time (10-20 minutes) so I assume it's some sort of heat protection. Removing the cover doesn't reveal any dustbunnys or scorch marks
Any other Yamaha power down threads I've seen so far talk about immediate shutdown or coinciding with a volume increases which doesn't seem to be my situation. The diagnostics menus don't quite match the service manual I found, 20.1 thru 20.4 all say "I PRT". A 457 service manual says that means excessive current so bad power supply?
Any suggestions?
Thanks,
If you suspect that it's a thermal shutdown, is it getting hot/warm? Is the receiver located where it can get airflow, or is it tucked away somewhere?
That was my first thought but the manual says thermal protection is a different code (TmPRT). It's in a unit on a shelf above the TV so not ideal but it's been there for 10 years and it's Dec now not Aug. If anything there should be less ambient heat since I sent the cable box that was next to it back to the cable company.