Onkyo HT-R690 AV Receiver Front Right Channel Not Working

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  • budm
    replied
    Re: Onkyo HT-R690 AV Receiver Front Right Channel Not Working

    Read the schematic is the start, you need to be able to read the diagram to be able to trace the signal paths on the unit based on the diagram, form output back to input if you know what that means.
    If you are a real beginner and want to tackle something this complex it is not going to be easy for us to hold your hands on every steps.
    So tell us what your experience is first.

    Leave a comment:


  • sfernandes
    replied
    Re: Onkyo HT-R690 AV Receiver Front Right Channel Not Working

    Originally posted by budm
    Well, you now have the diagram and the AC mV meter, so start tracing out from the output back to the input. Feed audio into Front Left and Front right then use the meter to look at the signal of the working channel and compare it to the non-working channel. It can be a simple as bad connection or bad speaker relay contacts, etc.
    Any idea what do I measure? what components? where do I start? I have never done this kind of diagnostic before?

    Leave a comment:


  • budm
    replied
    Re: Onkyo HT-R690 AV Receiver Front Right Channel Not Working

    Well, you now have the diagram and the AC mV meter, so start tracing out from the output back to the input. Feed audio into Front Left and Front right then use the meter to look at the signal of the working channel and compare it to the non-working channel. It can be a simple as bad connection or bad speaker relay contacts, etc.

    Leave a comment:


  • sfernandes
    replied
    Re: Onkyo HT-R690 AV Receiver Front Right Channel Not Working

    Originally posted by budm
    So you have more than one unit that allow you to swap the boards?
    Not at this time. I did have one here for repair of a faulty HDMI board which I fixed up and I decided to do that swap to see if this one im asking about had a bad one, but the channel worked find in the other unit. The units were not the exact model numbers, but had similar HDMI boards just one had less HDMI's than the other. The other boards looked different.

    Leave a comment:


  • budm
    replied
    Re: Onkyo HT-R690 AV Receiver Front Right Channel Not Working

    So you have more than one unit that allow you to swap the boards?
    You may be able to use in mV AC mode to trace out the audio signal.
    Last edited by budm; 08-29-2016, 06:43 PM.

    Leave a comment:


  • sfernandes
    replied
    Re: Onkyo HT-R690 AV Receiver Front Right Channel Not Working

    Originally posted by budm
    Service manual:


    Do you have scope to trace where the signal gets lost?
    No I don't have a scope all I have is a Fluke Multimeter

    Leave a comment:


  • budm
    replied
    Re: Onkyo HT-R690 AV Receiver Front Right Channel Not Working

    Service manual:


    Do you have scope to trace where the signal gets lost? Looking for signal from speaker protection relay back toward the input.
    Attached Files
    Last edited by budm; 08-29-2016, 06:40 PM.

    Leave a comment:


  • Onkyo HT-R690 AV Receiver Front Right Channel Not Working

    Hello,

    The front right channel is not working on this one. The receiver does not go into protect mode, it's working fine on all other channels. I checked all the nobel resistors and they checked out ok. The Transistors im assuming are ok or else the unit would go into protect mode. The problem is not the HDMI board as I have put this HDMI board into another unit and all channels worked.

    Any ideas anyone?

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