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Yamaha RX-V650 won't power on
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PostPosted: Sun Nov 22, 2009 8:07 pm    Post subject: Reply with quote

Very good to here! One question... I've used a 5 mm pitch PP cap, that was clearly to small that I fixed with a small cable extension. I should have used a 10 mm, but you used 15 mm. Wasn't that really to large pitch?
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ThiPo
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PostPosted: Wed Nov 25, 2009 2:31 pm    Post subject: Reply with quote

Yeah it was a little bit too large,
but i bended the "legs" of the capacitor a little bit, and it fitted just fine.
I'll try to make a picture of a capacitor with the bent legs.
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darecy
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PostPosted: Fri Feb 05, 2010 5:24 pm    Post subject: Reply with quote

I have same problem, I have replaced the C405, and the problem didn't go Sad
I will buy the next two C411 and c406 and I will post the my amp status.

The switching off in the amp was so annoying, therefore I went to the shop and I bought new RX V2065! Good model, loaded with new features, but personally I think my RX V650 has better sound! sad...
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darecy
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PostPosted: Sun Feb 14, 2010 5:00 pm    Post subject: Reply with quote

I have change this 3 capacitors and the problem is still there
please help !
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elekos
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PostPosted: Thu Feb 18, 2010 8:56 pm    Post subject: RX-V power on problems Reply with quote

Hi there!
If capacitors exchange didn't help, I suggest give up- main processor could be faulty, or general fault in standby circuit is possible... You can just measure diodes, transistors in standby module, and exchange optocouplers one by one- take off one, use new, and if doesn't help, use old one into place of second one, and again... some of You seems to be newbies in electronics, it's nothing bad, but You must realize, that units with so complicated circuits like Yamaha's receivers can repair those, who has not only basic knowledge and practice- believe me- even very handy specialists sometimes cannot repair these units, especially with objective- standby fault... Good luck friends...
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E.M.R
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PostPosted: Mon Oct 11, 2010 9:34 am    Post subject: C 405 Reply with quote

My RX-V650 has been fixed too by replacing C 405, 22nF / 630V Very Happy .
when I messured the old C 405 I could see that the value had droped from 22nF to appox 2nF.
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Razormcc
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PostPosted: Sat Dec 04, 2010 9:55 pm    Post subject: yamaha rxv650 Reply with quote

I have this same fault and have no idea where to start to try and fix it! any help please Rolling Eyes
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jts1957



Joined: 24 Nov 2008
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PostPosted: Sat Dec 04, 2010 10:04 pm    Post subject: Reply with quote

I would suggest going to the first post on page #3 of this thread a read from there to the end of thread.
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ehbaad



Joined: 01 Jan 2011
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PostPosted: Sat Mar 26, 2011 4:25 am    Post subject: Re: RX-V650 power on-off problem Reply with quote

elekos wrote:
C405 capacitor is very important to proper standby voltage. Install new , even if original looks fine. By the way- on the C406 should be not less as 7.00 VDC, and sometimes add extra capacity to the C411 will help. For sure, check all ground connections, especially on the main and on the DSP module. Smile


thanks elekos.
i never thought i could bring life back to my old yamaha for a coule of quids. my happiness did not last very long though. As i was trimming off the excess capacitor wire sticking out of the PCB, i forgot to unplug the amp hence there was a spark and the anp switched off afterwards.
my happiness was very shortlived.
I would love to get your advice on what i could have damaged and how to repair it. This may be a hard one.
look forward for your reply
ehbaad
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PeterD
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PostPosted: Thu Jun 23, 2011 2:52 pm    Post subject: Reply with quote

Thanx to this forum I have my Yamaha back from the dead.

Thanx again
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