Question about Yamaha RX-V3800 Receiver
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Posted on Jan 02, 2017
SOURCE: Double clicking sound- no power
The relay contacts are most likely bad in the relay and will most likely happen again. If you know how to solder, take out the relay and look up the numbers on the internet and see what you can find. If not, try to find where the manufactuer is located and call them to see where you can get a new relay. Good Luck
Posted on Mar 28, 2007
That problem is well known problem with a memory capacitor on the stand up board that is the control board. It is .47F 5.5 volt capacitor that resembles a button battery. The cap leaks all over this board the fluid is conductive and corrosive. So the cap must be removed and the board scrubed clean with contact cleaned and dried before replacing with new cap. the unit can run without this cap but if the power should be removed all customer settings will revert to the default. also check the copper ground screws for tieghtness.
Posted on Jul 08, 2007
You've probably already tried this, but...
Disconnect power from the mains, remove lid.
Reseat all the low-power connectors in the unit.
Check the thermister on/near the main transformer.
Check capacitors on or near power supply for obvious anomalies (fattness, leaking, smoked, etc.)
Replace lid and, plug back in, do a rain dance and hope.
Posted on Mar 04, 2009
When it shuts off, does it display anything on the front like "ck speakers" you could have a shorted wire or bad speaker. Sounds more likely than a bad receiver. Yamaha is pretty bulletproof in "self preservation" circuitry! about the only thing that takes them out is lightning and major power surges. I have been selling and installing Yamaha receivers since 1995 and have only ever seen one with a problem that was unrelated to power. and I've done hundreds. If your not using HDMI, and the Video portion of the receiver, I would definately keep the unit $ 1500.00 is no cheap receiver. Try disconnecting the speakers, then turn on the unit with a source connected like cable/sat/fios on then crank the vol and let it set, if it cuts out, yes you've got a problem internally, however, I would stronly suggest metering all of the speakers and wires for shorts. There is an internal fuse as well right near the power cord, you have to pop the top to get to it, If you have a multimeter check the fuse with resistance tone. If you get tone, you have a good fuse if not If you need to replace it. They can be found at Radio Shack etc. If the fuse is OK, chances are you've got bad transistor(s) and needs to go to service. Repair should be under 200, well worth it. If you have further questions, post a comment and I will get back to you ASAP. Hope this helps
Posted on Jun 06, 2009
Most, but not all of the voltage regulators are cooled by the same heat sink
that the output transistors are attached to and get overheated when you crank up the volume. Although this unit has a cooling fan, after some time the heat sink gets HOT and will age these parts. There are also a group of three current limit/ voltage drop resistors supplying one regulator that will give up too. This is not for most DIY folks. Repairs are available in certain parts of the country. I know of one you can ship the unit to and get it fixed like I did.
Posted on Sep 17, 2009
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