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Pioneer sx 780

When turned on dial lights up but get no sound from any speaker- how should I proceed? thank you

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Re: pioneer sx 780

This model has a audio relay at the speakers output. When you turn the unit on there's a short delay and then the audio output switches on. It happened exactly the same with my unit. The problem is that this relay is not "closing" properly so there´s no audio coming to the speaker rear pannel conectors. You´ll find this relay inside the receiver, exactly behind the power switch. It's a clear rectangular plastic box with coils and contacts inside, make sure these contacts close after turning the unit on. You may need to take away the clear plastic box in order to have access to these contacts. Clean them and the mechanism with proper electronic fluid. Make sure these contacts are moving and the springs are ok. Hope this helps. Regards, Andy.

Posted on Dec 02, 2009

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Pioneer deh-x36ui. Sound cuts out when turned up

Hello there,

When it cuts out, then if you dont get an 'AMP errror', on the display, then it sounds like your speakers are faulty. Try using a different pair of speakers temporarily to prove if its the Pioneer or the speakers.

If its the Pioneer, then back to base unser Warranty or repair shop.

Sep 15, 2014 | Car Audio Receivers

1 Answer

DEH-P5800MP pioneer ...all things come up and operate except for sound out the speakers. Even the volume dial registers as well as the screen volume graphics.

Hi Michael,

We will start with the pdf manual.

Next you will check all the speaker connection's so they are biased +- +-. Ensure your ground is correct at the chassis of the receiver to the frame of the car.

Here is the manual from Manual Labs another look. Pioneer DEH P5200 Manual

There is a reset on the speaker output located in the manual. Perhaps your speaker impedance is above the receivers digital tolerance. Bench test the speakers with other in place of the working site. Most of all situations are oversights or happenings when closing up the job site.

Audio adjustments at your finger tips to check that by the book.
Pioneer DEH P4800MP Operation Manual Page 25 Using Balance Adjustment

And finally. Our site has a lot of answers. Please take some more time to familiarize your head with it. After doing some trouble shooting from a-Z check this out.

Troubleshooting Support for Pioneer DEH P5200 CD Player

Fare. Well.

Everyone please learn the ropes at Fix Ya. A lot of your answers may be posted. Please take patience into account for those who strive to prepare their sincere intentions to succeed.

Please? We want you to rock. Easy does it.

Jul 06, 2014 | Pioneer DEH-P5200 CD Player

1 Answer

Installed my Pioneer DEH-1100MP When radio is turned on display /tuner/aux comes up Can set stations etc but no sound With light tester to speaker wires there is power etc

Does your car have a Factory amp if so u need to find the blue wire ( on most cars) and either ground it out or and power to it, it should turn the speakers on for you to play

Sep 10, 2010 | Pioneer DEH-1100 CD Player

1 Answer

My pioneer deh-p840mp powers on and flips open, and seems to function fine with the exception of no sound going to all my door speakers and the bass to my subwoofers is a far sounding muffle even as I turn...

Un hook all your speakers that the deck is powering and hook them up one by one sounds like u have a shorted speaker or wire and the unit is going into protection.The best way to chk the speakers and wires is with an ohm meter . Check each speaker wire to ground and across the speaker and see iof you have any shorts. The next step woulk be to remove the unit and have it bench tested.

Jul 30, 2010 | Pioneer DEH-P840MP CD Player

1 Answer

Pioneer DEH-P6500 head unit doesnt turn on

Check your radio fuse. It is likely if you didn't disconnect your battery terminal that you may have blown a fuse.
About the speaker distortion, you may need to install filters to each speaker. They are not very expensive and can be found at just about any electronics store.

Feb 26, 2010 | Pioneer DEH-P6500 CD Player

1 Answer

Pioneer dehp3100ub.stock speakers wont work with unit?

If the vehicle has a premium sound package - you need to use the remote wire to turn on the factiry amplifier.
If you want to use the power from the radio for the speakers, you must buy and install a factory amplifier bypass harness.

Thanks for using FixYa - a Very Helpful rating is appreciated for answering your FREE question.

Jul 19, 2009 | Pioneer DEH-P3600 CD Player

1 Answer



Pls verify your wiring. The Pioneer DEH-P4100 uses the below speaker wiring.
whereas a typical 2000 Ford Mustang that does uses an external amplifier would be using the below wiring scheme in its two (2) connectors.
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.

Mar 22, 2008 | Pioneer DEH-P4100

1 Answer

I try to fix my pioneer deh2300, but no sound.....

If you have verified that indeed all the wires are connected as to where they are supposed to be connected, pls try:
1. Activating Internal Speaker to ON in the DFS Alarm Function'
2. the brown wire (or whatever color wire it is that is to be attached to a mobile phone) must not be connected to anything;
3. try all sources, AM, FM, CD;
4. check that none of the speaker wires is grounded.

Pls post back for any developments or the lack of it.
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.

Nov 30, 2007 | Pioneer DEH-P4100

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