Yamaha HTR-5730 Repair Question

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DH2

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Apr 17, 2013
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My Yamaha HTR-5730 is going into circuit protection mode and shutting off. After tracking down the service manual and entering diagnostic mode I'm seeing the PS (Power supply voltage protection) value is around 50% where the normal range is 8 - 26%.

Does this sound like the transformer or one of the transistors needs to be replaced? I don't see any bulging in the transistor caps and they all appear to be seated fine without bulging at the bottom, but that doesn't rule that out. I'd even much rather replace a transistor since I can only find one source for a transformer and it's pretty pricey.

The DC (DC protection) value is in within it's normal range.

Any thoughts from the EE's among us?
 

soundguruman

Distinguished
Disconnect all the speakers - to test if you have a bad speaker or speaker wire first.
A bad speaker or wire will trip the protection.

If it is a bad part inside the unit, please don't try to repair it yourself.
It's more difficult than you realize.
 
Mar 11, 2018
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Hello @DH2, did you find a fix to your problem? Because I am experiencing the same problem. unfortunately, and your help would be much appreciated. Thanks
 

USAFRet

Illustrious
Moderator


The OP has not been back here for 5 years. Unlikely he's reading this.

Closing this old tired thread.
 
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