Question about Pioneer Premier DEH-P480MP CD Player

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Some buttons don't work anymore...

The buttons "Audio", "Fonction", "Down" and "Right" don't work anymore.. I checked the switches with a multimeter and they are OK. I cleaned the contacts between the front panel and the amplifier but the problem was not resolved. Everything is working if I use the remote control, so this is a hardware problem but.. where??? thanks!!!

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Re: Some buttons don't work anymore...

If this unit has a "flip face" then I would suspect the ribbon cable that goes from the face to the main circuit board.

Posted on Sep 10, 2007

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KD-R826 BT. Push buttons, vol control on detachable panel do NOT work. Panel lights up, front mounted usb MP3 mmemory stick plays OK. Contacts clean. Need a new panel ??

You may has a bad switch. If you have a multimeter, you can check the switches for resistance. If the resistance is a few hundred k ohms or less on a switch, it is probably bad. The microprocessor in the deck can handle only one function at a time. If it is getting a signal from one of the switches, it will lock the radio up.

Jul 28, 2015 | JVC Car Audio Receivers

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Volume down button doesn't work

hi, make sure the face pins are clean; try resetting the unit; check to see if the feel of the down switch is the same as the up switch....if not then your down switch is faulty and needs to be replaced. confirm the volume down operation by using the remote control (if available), if it works then your problem lies with the switch or a broken connection between the switch pins and the face control circuit. cheers.

Jun 21, 2012 | Blaupunkt RPD-545 CD Player

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Hi, I have a pioneer DEH-P5500MP which always worked just fine but now when there is no cd in the radio it won't play so i try the source button but that doesn't work so i put a cd in and it starts...

It sounds like you may have a bad switch. If you have a multimeter you can check the switches for resistance. If the reading on any of the switches is less than a few megaohms it is probably bad.

Oct 30, 2011 | Pioneer DEH-P5500MP CD Player

1 Answer

I have a Sony CDX L480x fitted in my car, this radio has worked fine since i got the car, unfortunatly when i put the face back on it the other day, none of the buttons will work, volume, source...etc. All...

It sounds like the volume button may be jammed or the volume up switch may be bad. If the switch is open just enough to let some voltage through it locks up the microprocessor. Unless you have a multimeter and know how to check resistance on a switch you would be better having a professional repair person check it out.

Sep 29, 2011 | Sony CDX-L480X CD Player

1 Answer

My sony cdx s1000, the source button does not work,therefore i cannot get the radio to tune into any stations.the cd player works but the various buttons have no effect on volume,skip tracks,shuffle etc.

you may have a bad switch. if you can you can use a multimeter to check the resistance of the switches. anything less than a few megaohms, denotes a bad switch usually.

Nov 12, 2010 | Sony CDX-S1000 CD Player

1 Answer

The panel will no longer recognize some of the buttons. for example, the source button doesn't work nor the push-menu. the power and eject button still works. How do i fix this?

it is possible ;you may have a bad switch. if you have a multimeter, try checking all the switches. if one or more is less than a few megaohms, it may be bad.

Aug 12, 2010 | Aiwa CDC-X204 CD Player

3 Answers

I need schematics for wiring ,colors etc..

Red 12 volt switched
yellow 12 volt constant
black ground
white left front +
white/black left front -
gray right front +
gray/black right front -
green left rear +
green/black left rear -
purple right rear +
purple/black right rear -

if you need more information or there are more wires please feel free to send me a message. Please rate.

Nov 17, 2009 | Clarion DB-235 CD Player

1 Answer

The other day the detachable wouldn't work right, it was on and I had my music up and tryed to cut it down and it wouldn't work and I pushed every other buttom and the entire face wasn't responding and it...

you probably have a bad switch. if you have a multimeter you can check the resistance of the switches. if one is reading less than a few megaohms, that is probably the bad switch.

Oct 22, 2009 | Pioneer Premier DEH-P960MP CD Player

2 Answers

My Kenwood DPX-4020 suddenly turns up to max vol

you probably have a bad switch. you need to use a multimeter and check the resistance of your volume up switch, if less than a few meg., the switch is bad.

Oct 05, 2009 | Kenwood DPX-4020 CD / Cassette Player

1 Answer

Volume problems

When mine did this I opened the face up and figured out that the volume down button switch had a broken contact which made the volume and the first 3 station presets freak out. It took me about a half hour - 45 min. to fix it (since I had to diagnose it first) Won't cost a dime if you fix it this way...

First figure out if one of your volume buttons doesn't feel right when you press it (it doesn't 'click' or act like the rest of the buttons do)

When you open the face you 'll see all of the white switches (small boxes with silver surrounding the button on the top) take a tiny flathead electronics or eyeglass screwdriver (or something like that) use it to "pry" up the silver piece that surrounds the button (The edges on each end have a 'lip' that holds this metal piece down & you might need a magnifying glass depending on your eyesight.)
It will bend but you can flatten it back out.
Once it's off - the button will come out and if you look down into the 'box' of the switch you'll see a small piece of metal (the contact)
Use your small flathead screwdriver to lift it out. (or turn the circuit board over and tap it out)
it is a small rectangle piece of metal that has a 'bump' in the middle.
Check to see if the "bump" is split/broken in the middle. (mine was)

I then did this same process to the switch for the AM radio button (since I don't use it) then I took that 'contact' out since the 'bump' wasn't split and put it in the volume down switch, then I put it back together (using) the tip of the screwdriver to press the metal that was a little bent back down under the 'lips' on the edge and over the button.

Now you can put the 'face' back together and "viola"!!
It works properly, the volume doesn't freak out anymore, and you can enjoy a properly working car stereo again!

Jul 26, 2008 | JVC KD-S5050 CD Player

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