20 Most Recent
Yamaha RX-V461 AV Receiver Questions & Answers
My yamaha RX-V461 receiver won`t turn back on
Hello, welcome to Fixya!.
The receiver is obviously having a power problem as a result of the power outage. Those components (diode, transistor, etc) you checked are what I would have told you to check normally. But since they seem alright, it means you will have to replace the power supply including the transformer of the receiver.
Since there is no output on the transformer, it is possible that the transformer coil is burnt.
In summary, problem lies between the transformer and power supply board. They both need to be replaced. There are some bad components on the power supply board that you cannot detect with a meter. So just change the power supply with the transformer and your receiver's power will be restored.
I hope the above is clear.
Regards.
Yamaha rx-v461 turns on then
Generally speaking, an amp attempts to protect 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.
Check for loose speaker connections at the speaker as a root cause for ntermittent shutdown.
When I turn on the unit it only stays on for 2
Since you have done the required test but the amp tends to go off into the standby position then it becomes important to check if this is the PROTECT MODE.
In most cases of the amp cut off soon after the ERROR amp detects there is a higher CURRENT drain than required in the design. So the error amp cuts off the relay / or does not switch over the relay so as to safeguard against higher current , possible burn outs.
In this case you need some technical help to check the outputs, You will need to check for shorts on the outputs, disconnect each of the channels, disconnect power to either channels till the error amp resets.
Finally with the amplifier removed off the power for some time, press on all the front panel buttons to ward off the residual voltage, then while the power is plugged on , keep the input selector/standby power pressed On, just in case to reset the processor if an error had crept in.
Also check if any speakers have shorted.
Not finding what you are looking for?
