Re: Another Yamaha RXV671
What do you mean by "Hang all Qpins one by one? I've been repairing gear for years if I don't know what you are talking about how is this guy going to figure it out?
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Re: Another Yamaha RXV671
Hi, Please Do check all the Transistor Amplifier. each pair consists of PNP and NPN Transistor. Make sure that they are okay. try to compare the measurement. then after that try to hang all QPins one by one. after that go to Protection Circuit and check if there is no suspicious component.
If all the components are okay you can proceed to check the Main Power Supply.
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Re: Another Yamaha
Apologies, I forgot about the service manual.
Not easy to look at on an iPhone lol.
I haven't spent a lot of time on it so far, mainly checking for dry joints, and checking caps that have been mentioned in previous posts.Leave a comment:
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Re: Another Yamaha
It's never wrong to ask a question, but if you want to get folks more interested in your case, maybe you should update this thread on what you know, or have figured out in the mean time. You also didn't attach the service manual nor pictures, so I am sure not too many folks are going to spend their time on it like this.
I've seen your posts on the other forums as well and figured your were well on the way.
If it would be me, I'd check and monitor that voltage source. Since it goes high after some time being turned on and is not stable wandering around, I'd say it is heat related. It could be something stupid like a cold solder joint.Last edited by CapLeaker; 02-03-2019, 11:17 AM.Leave a comment:
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Re: Another Yamaha
Because I received no replies on one forum and only a couple on the other, is it wrong to ask nowadays ?Leave a comment:
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Re: Another Yamaha
Why would someone repeat the work others have done, reading the schematics, interpreting 160/129 etc.
You've cross-posted the same repair to at least two other forums:
https://www.eevblog.com/forum/repair/yamaha-amp-woes/
http://repairalmostanything.com/thre...-yamaha?page=1
Perhaps you should finish work with those forums.Leave a comment:
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Another Yamaha
My Yamaha RX-V671 has an illness
I think we had a power surge/outage a couple of days ago as my PS4 informed me that I hadn't turned it off properly, it's usually left in rest mode to charge the pads, anyway, amp turned itself off when my wife turned it on, and then again, so I tried, same thing, I reset the amp, checked all speaker cables, then powered it back on, it worked fine for about 45 mins then switched off again.
Diagnostic mode gives the error: PS: PRT 135 H
I also see a fluctuating value in p1-2 diagnostic: PS 160/129 which suggests a high volt error somewhere ?
No C405 on this amp lol
I have the service manual, but wiring diagrams have never been my strong point :/
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