Question about Motorola DCP-501 Receiver

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No sound Moto DCP501 Sound was very low when I first got it. But didn't use it much so didn't care. Now there is no sound at all. I've tried everything from switching A/B input, audio mode, plug in diff speakers, etc. I even plug in a DMM to check the voltage just for the hel of it. a constant 2.49v on all speakers out while the movie is playing on the internal DVD player. Speakers measured 8 ohm as specified. I did a resistant check on all the speakers connection on the receiver side too and none of them shorted. I"m stumped and need help before I open this thing too far off to put it back together correctly. Thanks.

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  • some thing
    some thing Aug 26, 2006

    That's what I measured... DC voltage. I was hopping to see it changes but instead it give a constant 2.49v. I measured the speaker and it's still 8 Ohm so it's still good. If the speaker is fried the Ohm should be overload or short. But it didn't smoke or anything.

    Open the receiver and don't smell any burn either. Inside there seem to be 2 decoder board because it has mpeg written on the board and chip. 1 board seem to do the amplification and it seem to not getting anything either. The main board will be a problem to troubleshoot since it has everything on it.

    Anything else I could try?



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If you have a constant 2.49 volts on the speaker output Im surprised that your speakers are not smoking or making a BIG racket!!!? Sorry my friend you must have measured wrong as if you had a constant voltage on the speaker output, unluss the unit is a real cheapo unit, you wouldnt have speakers left or you would have smoke, as there should never be any DC voltage on the speaker outputs and if it was an ac voltage it would be making a big noise. Sounds like you should get a new unit or take this one into a repair shop. Good Luck

Posted on Aug 26, 2006


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The following is from the User Guide -

Check to make sure that each speaker has been properly connected to the
speaker output jacks on the rear panel of the DCP501.
�� Check that the speakers are working by utilizing the Test Tone function as
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From page 24 of the Installation Section

The clear protective film on the DCP501 display must be removed and transferred to the inside back cover of your
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On Page 28 -

Do not disconnect the cable connection between the RF In and To RF In ports. Removal of this
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IMPORTANT! The digital cable feature of your Motorola DCP501 can be activated only in
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Page 74 -

Using DCP501 Cab le TV Functions
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