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Yamaha r-v701 receiver wont turn on

The pcb relay makes buzzing sound.No power,lights or anything

Posted by yamahapaul on

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Rob Galayda

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Usually a buzzing relay is an indication that AC has snuck into the circuitry. 99.999999% of the time, relays in home theatre amps are DC powered. If you power the relay with AC, it will buzz . I think you have a serious problem, that requires a service tech. Is the unit under warranty ?.....If so...great. If not, then I suggest you take it to a Yamaha shop, just because thay have access to all the necessary electrical diagrams and service bulletins. It may be possible that there is a factory modification out to correct an existing production problem with that unit, that only shows up later. If so, you should be eligable for the upgrade from Yamaha. If the unit is NOT under warranty, and it requires a factory mod, you may be eligible for a goodwill repair from Yamaha. Best of luck....Rob

Posted on Mar 04, 2008

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Yamaha r-v701 just shut off one day. Im on soc security and cant send it in to be fixed so im trying to find out if it has an internal fuse that may have blown that i can replace? please help
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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.

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Yamaha v-r701 reciever It has sound but it is very faint. You have to turn the volume way up for it to play at a wisper.
NEVER USE MAXIMUM VOLUME FOR TROUBLESHOOTING.

Turn the volume control to something medium.

The errant switch, control or condition may change and you will suddenly release the amp's full power and possibly destroying your speakers. If a signal isn't audible at 1/2 volume it's probably not there.

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the first pin on the left should be a half volt or so for the npn transistor and -.55 or minus a half volt for the pnp transistor.
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Fuse blows as soon as you turn it on. I disconnected all speakers and equipment and still have the same problem.
The power suply most likely has a problem. If it was the outputs, the unit would not come out of protect mode. Check the rectifier diodes for a short.

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YAMAHA R-V701 MAKES BUZZING SOUND & WONT TURN ON
This could be the indication of an open resistor, or bad Capacitor in power supply. May not be visible to eye, but if you look in PS. there should be atleast one big sized cap and every PS has a bridge rectifier, this is usually 4 diodes in series, check them and see if any open, shorted
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