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I have a Yamaha HTR5840 Receiver and it will not turn on. I have proven that the stand-by transformer was faulty and have replaced, yet the unit still will not turn on. What else could be the problem?

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The internal fuses need to be checked. If when you open it up you dont see a normal looking round fuse, then its going to be a board fuse and when they blow, you dont really see any trace of them ever being there because its just a piece if fuse wire soldered directly to a spot near the power in is on the board. Look for solder that is a little shinier that the reset and you'll find it. Good luck.

Posted on May 16, 2010

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Using Bose 901 Equalizer on Yamaha HTR-5840 Reciever


The manual is linked below. Page 19 advises you to use the "MD/CDR" - "IN (PLAY)" and "OUT (REC)" analog audio jacks.

http://data.manualslib.com/pdf/20/1975/197493-yamaha/htr5840.pdf?ace7c7b79ec34305a811125fb9ef1160&take=binary
http://data.manualslib.com/pdf/20/1975/197493-yamaha/htr5840.pdf?ace7c7b79ec34305a811125fb9ef1160&take=binary

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the clicking may have been coming from the relay itself, but it doesn't simply mean that the relay is faulty. clicking may also be caused by transformers, indicating that some electronic components have developed SHORT CIRCUIT. try measuring resistance of transistors and diodes near the power unit (unplug/turn the unit OFF of course) check also for the impedance of the output power transformers.
check the amplifier IC for short also.

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I have Onkyo HT510 receiver. does not turn "ON".


hi,
There is a standby transformer inside the Onkyo receiver at the mains input stage. If the standby transformer is faulty then the unit will not power on. There will be two transformers. One is big and the other is a small one. The small tarnsformer is the standby transformer. Which will be fitted on a small board where the power cable is connected. Replace the transformer to rectify this problem.
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I need to know what amp fuse i need for my yamaha htr5840 receiver. i pulled out the blown one, but it only says 125 v. it does not tell me the amps.


The power consumpyion for yor amplifier is 350W / 440VA and the 2 switched AC outlets at the back panel can handle up to 100W, totally 450W. I suggest you to use a 5A / 110V fuse and in case burn down use an 6A / 110V fuse. DON'T INCREASE these values, you may damage the amplifier.

In case of a problem or clarification or further details needed, don't hesitate to post me a reply before rejecting my answer.
If you are satisfied, rate my solution with the "thumbs" or (even better) add a testimonial.

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Aug 13, 2011 | Yamaha HTR-5840 Receiver

1 Answer

Transformer has died where can i get another one


To have a tramsformer fail is an extremely rare occurrance. Why do you believe the transformer to be faulty? Do you get any response at all when attempting to turn on the unit? Please suplpy additional details about the problem and I can provide more details. A transformer will likely cost upwards of $80 plus shipping and take a while to get.

Thanks,
Dan

Jan 08, 2010 | Yamaha RX-V430 Receiver

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Wont do anything


Sounds like the stanby transformer has gone.
This is the transformer that turns the main transformer on and powers up the unit.
Cant be certian though, could be a host of other things.

Jun 16, 2009 | Audio Players & Recorders

1 Answer

The unit does not work


check the standby power supply first and then the main power supply.also check the output transistors and fuses your problem is in one of those points, normally the standby transformer goes bad, it is the small one right next to the big one.
good luck

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Volume varies by itself on the Yamaha htr5840 Receiver


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Yamaha RX-V750 AV receiver power problem


i had the same problem, only none of the above worked until someone told be to replace the ceramic cap .022 630v c405 on the sub board, and after this mine has worked fine since

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Sounds like the LED that lights up the display has burnt out. An easy fix, if you're not afraid to take the front panel apart and resolder a new one.

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