Question about Yamaha DSP-A1 Receiver
My DSP-A1 is powered off when I put the volume up (between 1/4 and 1/2) after many years, having the same configuration, including wires, speakers and units attached. Configuration: B&W Front, effect and center speakers (large). Niles as rear speakers. I have attached: DVD Audio unit, CDRW recorder, LD/DVD Player, MD Player, Phono turnover, VCR, TIVO, DIRECTV. All wires are MONSTER CABLES.
The A1 has an internal self diagnostic program which you can go through to find the fault. You can access the diagnostic program by simultaneously pushing some buttons on the front panel. The Yamaha service manual for the A1 tells how to do it and what the diagnostic codes mean. You can get a copy of the service manual on the web from several suppliers for a small fee.
Posted on Jan 20, 2008
I am no expert but i had simmilar problems and it turned out that some capacitors needed replacing
Posted on Nov 18, 2007
All you have to do, check all your speaker terminal and tighten it
Posted on Sep 26, 2008
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Generally speaking, an amp protects itself from heat, shorts, overloads and operator exuberance 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.
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