Question about Yamaha RX-V461 AV Receiver

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My Yamaha AV Rx-V461 not turning On

My Yamaha AV Rx-V461 bought just 9 months back. It was working absolutely fine even during summer when lot of overheating happens then it never turned-off itself. But surprisingly, 3 days back, in this cold weather, without much heating, after playing continuously for 1 hour, it suddenly turned-off by itself. There was no burning smell or spark or anything unusual which could be observed. Even after leaving it off and unplugged for several hours, 3days, it is not turning on. As per its manual, for any reason if protection circuit is activated then system should be unplugged for 30 secs and then it can be used normally. But this has not happened. I was happy to assume that there must be a fuse behind which would have blown, but shockingly there is none.
can anybody help?
Prashant

Posted by on

  • prashants3 Feb 20, 2009

    Thanks Mr Dan for advice. I have sent it to the service center yesterday only (it had one year warranty period). Today I got a call from service center that it has been repaired & can now be collected back. On asking what had gone wrong, I was told that a thermal fuse attached with main transformer had blown and was replaced.

    For this repair I would have spent money equivalent to about 60 USD, had it not been under warranty. As this amount is not small for me (if required to be spent quite often beyond warranty period). There is hardly any cost of that fuse, whole amount is mostly for service.

    I fear if this problem happens frequently, I will not be able to send it to service center. Can you or anybody help me in getting service manual of this model? Or at least, can someone tell me how to open (& then close it properly) for changing the fuse next time if required. I am myself an Electronics Engineer and can do this if I come to know the proper method of opening & closing it. (I can see all the screws but there may be a special procedure for opening & then closing also).

    Thanks & Regards!

  • prashants3 Feb 21, 2009

    Thanks again Sir,

    But the service technician told me that he has replaced ONLY the fuse which is (somehow) attached to the transformer. Cost of this fuse is only Rs 5 (10 cents). ALSO he took only few minutes to do this job. That is why I was tempted to prepare myself to do this if required in future.



    My power strip already has the surge protector. But, since you have pointed out, I shall change it to a better quality.



    May I still request you or anybody help me in getting service manual of this model or tips on how to open (& then close it properly)



    Regards!

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These have regulator ic issues, Mainly the regulators for plus and minus 5 volts and 12 volts. All can be checked off the main connector coming from the top regulator board. Lately I see alot of theplus or minus 12 volts go bad. When one fails a plus 12v may read 9 or 10 volts only for example.

Posted on Jul 21, 2009

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Most units have a 1 year warranty, so be careful in opening up the unit. That being said, the protect message indicates that there is a problem in the final output stage of the amplifier. This can be as simple as a poor connection at the voltage regulators that will force the unit into an offset condition or more complex like shorted output transistors. and drivers. Since this unit is still relatively new, I would suggest that you investigate its warranty status first. Let me know what you intend to do.

Thanks,
Dan

Posted on Feb 19, 2009

  • ABRsvcs Feb 20, 2009

    Unfortunately, you can not change this fuse as it is an integral part of the power transformer. In fact the entire trnasformer was replaced. This usually fails because of a power surge. I would recommend that you purcahse and use a power strip with a surge protector for this unit. That should prevent this from happening again.



    Dan

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