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Dial lights up, all control functions O.K. bou no sound.

Checked P/S output- O.K. There is power on the system, but none on
the Amp. section. No voltage on output transistors, and heatsink remains
cold. No output from any speaker, though set seems to be alive.
Is there a fuse or relay for the Amp section which may be open?

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Hello: Thanks for your feedback. I was surprised that the type of unit and manufacturer did not appear with the request for help, because without that information it made no
sense. However I did resolve the problem by experimenting with the controls and connections on the unit. Just got it.
Thanks again....

Posted on Sep 02, 2008

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No sound from my ja 687 amp lights show receiver is working


Need to check on the power supply to the output drivers, if there is no response on the speakers it is possible that the output replay is under protection. You need to remove power plug and leave aside for an hour before the amplifier is plugged back. If all functions show on display but there is no sound check the PREAMP output- audio out. If there is audio then the fault is with a non switching of the power amp or a power amp protection. Since these are mounted boards with little access to testing you need to be skilled to go further to probe and proceed. Also Denon might refuse to service if the amp is tampered which also can be expensive.

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I have a pioneer vsx 515. Two days ago I went to turn it on and watch tv, and no sound. I have tried normal speakers as well as headphones (and it recognizes the headphones when i plug them in). ...


Get this service manual and follow it - basically you will have to determine
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2 - if the amplifiers themselves are good - touch with your finger their input and listen for the buzz on the speakers.
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Outlet has power but it the sub looks like there is no current going through it. the power light is unlit. is my 1995 sub dead?


You will have to remove the unit to check the Sub amp for failrue of the power section or the output.
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Sep 25, 2010 | Audio & Video Receivers

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Please let me know if you need more info.

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If its brand new, then return it for a refund.

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barneyluc

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Help urgently required.....


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Dan

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