Question about Pioneer Car Audio & Video

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I have a pioneer amp which serves both a CD player and a tape deck and radio. I can plug in the earphones and all is fine. Pulling out the earphone jack has always allowed me to listen through my speakers - but now - zilch! What is the most likely cause, please?

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  • judyandroger Sep 08, 2009

    Many thanks for your suggestions. The speaker jack itself is fine, as I can hear OK with the earphones. peakers are connected properly - no loose wires. It appears to me to be an amp problem - but that is too big a issue for me to resolve. The amp is M- L11 with the headphone jack at the front.

    All the connections appear to be correct. Have I missed sme other vital clue?



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The issue could be the earphone jack input itself going bad and needs to be replaced. You can also try to reset your unit by unplugging that and replugging that after 5-10minutes. If all this doesn't work then you need to check the wiring to your speakers as it could be because of loose wire.
Please do accept the solution if the issue is resolved or else revert for further assistance.          

Thanks Rylee 

Posted on Sep 06, 2009

  • Rylee Smith
    Rylee Smith Sep 08, 2009


    Please remove one of your speakers and have some speaker wire handy, also remove your head unit "leave plugged in" but unwire the speaker connections. Wire the speaker directly to the wiring on the back of the head unit to see if you get sound, if you do you need to rewire the speakers to the correct locations, if you dont get any sound more than likly your speaker is blown but test the rest of your speakers along with the head unit.

    To see if its the speakers of your unit, use a speaker that you know works to test the unit, if the speaker you know works doenst produce sound with your unit then its dead get a new one , but also test your speakers on a system that works to make sure they dont need a replacement.

    If this is not the issue then it might be a Defective audio amplifier/s or a possible shorted mute hold capacitor connected with the internal speaker circuit. It can also be due to a defect in the audio preamp circuit. You can do a quick check on the amps to see if they may be the problem by using a multimeter on DC volts and measure each speaker wire to gound to see if they have about 6 volts on each wire. If you do measure about 6 volts the amps may be OK and the no sound problem may be due to a shorted mute capacitor or a preamp problem.

    Please do accept the solution if the issue is resolved or else revert for further assistance.




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