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Cutis Vcr/dvd recoredr "pop" in audio. Flash across tv screen. Rugh Hum on playback for 2 to 5 seconds

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  • murkydee Nov 10, 2008

    I know the problem is not as suggested by tech. But I wonder if the problem could be a filter capacitor in power supply. There is loud "buzz" in audio for about 4 second on playback. Also "Crack" in audio followed by a a flash on screen. Mickey Deems

  • murkydee Nov 10, 2008

    Do not accept suggestion frpm Tech. But thanks . Have posted it again, with more clarity. Thanks Mickey Deems

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Was there smoke, smell or pop sound in your dvd recorder?If yes, its main capacitor is busted / leaky and this can be cause of all above mentioned problems in player.
You need to open player cover and inspect power supply board, there you will see big capacitor. check it has some liquid around or is it bulged.
Thank you.

Posted on Nov 10, 2008

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The "pop" in the audio could be a muting transistor that is not working. When a unit powers on or changes functions it should activate the muting transistors so you will not hear the "pop" noise. If the problem is just one channel, then you need to only check that channels muting transistors, if it is both channels you need to check the muting circuit all the way to the micro, it may even be that the micro is not signaling the muting transistors to turn on at all.

The hum could be a filter cap in the power supply, but may also be bad solder connections most likely in the power supply. They all should be checked.

I do not have the schematic for this unit, plus you never gave a model number so there is no way to look for one. Without the schematic it is very difficult at best, to be able to troubleshoot this type of unit.

Let me know if you would like to get more help from me by addressing your next post to me directly, otherwise it will be unclear who you are wanting to communicate with.

Dave
tech48

Posted on Nov 10, 2008

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I am sorry. But I did not understand your question.
I think the text has been mis-formatted...

Posted on Nov 10, 2008

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You can try a hard reset: Unplug unit from AC mains and remove all cables from unit. Wait about 30 minutes and replug to AC power and redo the cabling. Switch on the unit and see if it works..

Good luck..

Posted on Nov 10, 2008

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Hi,

Initially, it would seem that this is a known issue with this model. Often humming sound is introduced from the AC power. In some instances it could be traced to the speaker wires running in parallel with the AC cord or in some instances near the wall outlet. It may also be worth your while to check any and all other cables and connectors attached to the system. In some extreme cases, humming sound enters the system from the very own power supply of the unit and/or for AC plugs that are not polarized. Some have found temporary workaround by using a common polarized filtered power strip. If it is still under warranty, might it be to your advantage to consult your dealer or the manufacturer.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information. Good luck and kind regards. Thank you for using FixYa.

Posted on Nov 10, 2008

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Posted on Jan 02, 2017

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