Question about Yamaha HTR-5550 Receiver
This is most likely due to an IC, and could be a heat related problem, or a relay being switched on and off, or both in unison.
You can take the unit apart, and try spraying electronic cold spray on parts, until the unit stabilizes, and then you'll know which part is heat sensitive. Concentrate on spraying the ICs, transistors, and discrete components. Go slow, and allow the cooling to take effect.
Other than that, it's going to be a signal fault, and could be due to a cracked or cold solder joint, worn relay contacts, or some other tricky thing that will have to be troubleshot with specialized equipment.
Also check your connections to your speakers, and the internal solder joints on the jacks, rca connectors, etc.
Good luck, hope this helps, and thanks for using FixYa.
Posted on Sep 07, 2010
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Posted on Jan 02, 2017
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