Question about Yamaha RX-V2700 Receiver

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I have a yamaha rx-v2700 and it will not power on. there is power getting to the back of the power socket but no power at the internal fuse,

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  • northlodge Sep 09, 2010

    hi Palaboy, thank you for your response, so far i have not had time to look at the amp again but i can tell you that there is no power to the fuse (F1)



    sid

  • northlodge Sep 13, 2010

    Hi Palaboy, could you tell me the number on the circuit board where i will find the transistor that you want me to test please

    sid

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  • Yamaha Master
  • 5,807 Answers

Service Manual can aid you with the troubleshooting,

Audio Yamaha RX... - Electronics Repair


It is number 55 on the list.


Only with a fee.



Your unit , besides the standby transformer , there

is a much bigger transformer that supplies

voltages to the Amplifiers.


These amplifiers will not operate without the necessary

split supply ,


These power transformer will not have output voltages

if the primary windings are open.

( open meaning no internal resistance ).


If these transformer is not open,


Check for low voltage regulators that activates ( latch )

the relay that turns On your Power transformer.


If these are OK , three ( 3 ) things to check

a) check Micro

b ) check for cold solder joints

c ) check for possible shorted power Transistors

Posted on Sep 08, 2010

  • 7 more comments 
  • Rommel Cana
    Rommel Cana Sep 09, 2010




    here is a schematics to show you :





    If there is power on the outlet check on the circled component ( fuse )

    above

  • Rommel Cana
    Rommel Cana Sep 09, 2010



    here are additional guides:





    Troubleshooting







    Transistors








    How to solder boards properly




    ( click on the links above )

  • Rommel Cana
    Rommel Cana Sep 09, 2010



    these is where you would test ( pins on transistor )





    these pins should not be shorted , C and E

  • Rommel Cana
    Rommel Cana Sep 09, 2010



    sample image of the transformer that you may need to check

    for continuity in primary windings:


  • Rommel Cana
    Rommel Cana Sep 09, 2010



    On some Model like:





    might as well check , if yours have one

  • Rommel Cana
    Rommel Cana Sep 09, 2010




    sample image of the transformer connector:


  • Rommel Cana
    Rommel Cana Sep 09, 2010



    It is OK , take your time,

    But try to read the schematics above ,


    ( if you cannot understand what it means I understand )





    try to check if you have voltage selector at the back , sample image is also

    on the post above.


    here are sample image location of power transistors:



  • Rommel Cana
    Rommel Cana Sep 09, 2010




    additional guide for you :





    Troubleshooting

  • Rommel Cana
    Rommel Cana Sep 13, 2010





    I understand if you have not read all my post with images

×

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