Question about Onkyo Audio Players & Recorders
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Posted on Jan 02, 2017
SOURCE: Yamaha RX-V420 No power
If the standby voltage exists, the next step is to see whether or not the clock is working. Find the main micro chip. There should be a 3 legged crystal close by. You should see this oscillate (use a scope). No oscillation = no micro control = no turn on. It is possible that the micro is bad or the crysal is bad. Also, check to be sure that the output transistors are not shorted. It is also possible that these are preventing the system from turning on.
Posted on May 12, 2008
SOURCE: Onkyo TX-DS777 Problem
man I think i have the same problem....
i push the power button but immediatly the LED turns off. I cheked the fuse but thats not the problem. Please if you solve your problem let me know...
my e.mail adress firstname.lastname@example.org
sorry if you dont undersatnd me in some parts..im not very good writting english haha sorry..
Posted on Jul 29, 2008
SOURCE: No audio
I know that a couple of you have had the same problem with the blowing 0.47 ohm resistors. I had responded quite a wile back, but forgot to make any updates. Kostiko is correct about the problem relating to these two 0.47 ohm resistors being blown. In my case on two different Haman Kardon models, this was true, but there could also be another issue. What i have found is even after replacing these resistors, the problem appeared to still be there. What was happening was that right after turning the receiver on, the resistors would blow again. What you need to do is replace the two small ceramic disc style capacitors on the same pcb as the fusible resistors, as they could be shorted as in my case. You could remove these capacitors completely, or replace them with a similar size of the same type, as they are really just there for filtering higher frequency noises from the power supply. You can check them with your multimeter first. They shouldn't shorted even in situe. I forget the size, but they are approximately 100 nano farads. Good luck. I have done this to my AVR135, and it has been running great for about 6 months now.
Posted on Feb 03, 2009
SOURCE: Power will not stay on
Activated protection circuitry means that the amplifier is seeing conditions it does not like and is shutting down the power to prevent further damage.
Either you have a short in your speaker wires, in your speakers, or a blown amplifier.
Disconnect both speakers and turn on the amplifier. Does it still give the error message? If it does, your amp is blown. If it does not, carefully inspect your speaker wires and their connection. Make sure all looks good and reconnect the speakers and try it again. Still get the error message? You likely have a problem in your speaker cabinet(s).
Posted on Apr 21, 2009
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