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Yamaha RX-V3800 - What am I missing?
Yamaha RX-V3800 - What am I missing?
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Old 29th November 2019, 01:33 PM   #11
tojoko is offline tojoko  Netherlands
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Hi thanks
I bought an older but functioning RX-V2500...just have to work on the fan, it is too hot!
Found an article about that, so that will be no problem.
Tojoko.
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Old 2nd December 2019, 10:53 PM   #12
wpas is offline wpas  Australia
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Hi all,

Sorry for the slow reply on this. I did actually manage to get her working again - ran my soldering iron over all the solder joints for the driver and power transistors. After this she worked just fine and has been going strong ever since.

Must have been a cold solder joint causing an intermittent fault. I got lucky as none of the components actually had any issues.

Definitely well worth the effort given i picked the unit up for only $50.

Good luck to those trying to fix their own!
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Old 3rd December 2019, 07:23 AM   #13
Trollet is offline Trollet  Sweden
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@ wpas
That's good information. I have two RX-V1900 here, one with similar strange issues as yours, and one that I got as spare parts from trean27 in Norway.
That one have a psu-board that won't work.

My RX-V3010 had to go Yamaha service last year.
I didn't manage to get a clue what was wrong with it, other than that it went in protection. IIRC They switched out Digital 1 board, cost ~135 Eur. Not that bad.

I'm not surprised that there are problems with those AVR's, not only Yamaha. They run hot, and with rather complex cirquits, in a tight box with maybe 15 diffrent PCB's mounted in all directions. To complicated ?

/Figge
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Old 3rd December 2019, 07:48 AM   #14
Douglas Blake is online now Douglas Blake  Canada
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Quote:
Originally Posted by wpas View Post
Hi all,

Sorry for the slow reply on this. I did actually manage to get her working again - ran my soldering iron over all the solder joints for the driver and power transistors. After this she worked just fine and has been going strong ever since.

Must have been a cold solder joint causing an intermittent fault. I got lucky as none of the components actually had any issues.

Definitely well worth the effort given i picked the unit up for only $50.

Good luck to those trying to fix their own!
Not 100% sure it applies here, but I've seen cases where thermal stress inside some of the tightly packed units is causing the lead free solder to break connections. It is apparently quite brittle.
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