 Posted: Fri Feb 24, 2012 4:02 pm Post subject: |
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| just when the 46v output is disconected and i turn it on, i can clearly hear the relays
working |
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| Posted: Fri Feb 24, 2012 3:37 pm Post subject: |
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| Which two output transistors?
Is there any voltage on the switch contacts of either speaker relay? Each relay should have 2 switch contacts and 2 coil pins. |
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| Posted: Fri Feb 24, 2012 7:56 am Post subject: power transformer |
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| hi
the model is : A-2970 xx-v link: http://www.flickr.com/photos/75359858@N07/6779016880/in/photostream/lightbox/ thanks! |
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| Posted: Wed Feb 22, 2012 5:23 pm Post subject: |
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| Which transformer?
I should have specified speaker relay pins. |
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| Posted: Wed Feb 22, 2012 5:03 pm Post subject: |
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| thanks
. in the manual it says it sould be 46v so i think the transformer is o.k i guess the problem is in the power supply circuit or the protector circuit, just don't know what to look for. any idea? |
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| Posted: Wed Feb 22, 2012 4:23 pm Post subject: |
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| Should be very near zero.
http://elektrotanya.com/sansui_au-x711.pdf/download.html |
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| Posted: Wed Feb 22, 2012 8:11 am Post subject: mistake |
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| sorry the model is: AU-X711 | |
| Posted: Wed Feb 22, 2012 8:00 am Post subject: repairing an old sansui amplifier |
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| hello every one ,
new member here and also newby in the electronic repair i have an old sansui vx-a711 amp that accidently sorted a speaker wire since then gets in protect mode . after opening it i replaced two shorted output transistors and the two main 10000uf caps (one seemed blown) - now still in protect mode i noticed that when i disconnect one of the transformer outputs it gets out of protect and i don't know if the transformer is faulty or the protector board (the output i disconnect is around 45v) will appriciate any suggestions thank you all and have a great day! |
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