Question about Yamaha HTR-5550 Receiver
The protection circuit kicks in after one hour approximatly even if it has been used at very low output power. It is certantly not too much current drawn by the speakers. What electronic components could be at fault. I know a bit the electronics and I could repair the faulty component if I could know what it is. I have no circuit diagram to refer to. Faulty capacitor?
I would be checking about the regulator and power output stages for dry solder joints. With the progressive heating of the unit from operation, failing solder joints may be causing a condition to occur that operates the protection circuit. Careful inspection under good light is required. You may find soldering around outputs, drivers and other devices mounted on heat sinks or other devices that run hot to have circular fractures in the solder about the lead to be commonly responsible for the problems you are facing., if you have a soldering suitable iron, and the time and patience, go for it. I have included a link to a soldering guide here.
Good luck, thanks for using FixYa, and a rating of FixYa would be great for my time to address your problem. Cheers
Posted on Mar 16, 2008
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Posted on Jan 02, 2017
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