Yamaha HTR-5640... | Answered on May 10, 2014
Yamaha HTR-5640... | Answered on Oct 17, 2013
Several settings, like Subwoofer YES.
Register and download the manual for free at retrevo.com
What sub? Is it NEW to this scenario? Have you looked at ITS manual?
Yamaha HTR-5640... | Answered on Apr 03, 2011
Generally speaking, an amp protects itself from heat, shorts and overloads by refusing to turn on or stay on.
Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.
You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.
If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.
If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.
Yamaha HTR-5640... | Answered on Feb 19, 2011
Yamaha HTR-5640... | Answered on Dec 05, 2010
Yamaha HTR-5640... | Answered on Jul 26, 2010
Yamaha HTR-5640... | Answered on Jul 12, 2010
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