Won't switch to tuner

Mosfet 50wx4 indicates a feature of the Pioneer car radio. It isn't a model number. One Pioneer car radio/CD player with this feature is the DEH-1500. On this model, you need to turn off the unit to set the clock. Press and hold the Source button (to the left of the preset tuning buttons) until the device turns off. Press Audio (upper right corner) repeatedly until the clock appears in the display. Use the arrow keys (Skip/Back or Left/Right) on the right hand side of the radio to select a segment of the time to adjust. Use the Up/Down arrows to set the current time. Repeat choosing the time segment and adjusting the time until both the hour and minutes are correct. Press Band or press and hold the Audio button to exit the clock setting mode.

ManualsLib has the manual for the Pioneer DEH-1500 here: https://www.manualslib.com/products/Pioneer-Deh-1500-Car-Cd-Player-Mosfet-50wx4-Super-Tuner-3-Am-Fm-Radio-3432555.html . See page 16 for the clock setting procedure: https://www.manualslib.com/manual/129844/Pioneer-Deh-1500.html?page=16#manual . See page 6 for the picture of the front-panel buttons for the DEH-1500.

I hope this helps. Please add a comment with the model of the car radio if the above procedure doesn't work for your unit.

Cindy Wells

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.

That sounds like your radio is going into protection mode. I would disconnect your speakers one at a time and see if your sound comes back on.

Usually, On a pioneer stereo, the button that you press to change sources (Tuner, CD, etc etc).. if you hold it in, the unit will turn off.

Look for a button that says Power, or PWR near it with a Square and little line coming from the square, that means you need to hold that button to perform that function. Hope this helps.

you need to buy a pioneer ipod adaptor part number
(CD-IB100) its on your owners guide page 8 secction 1
good luck

hi im using pioneer DEH-5750MP pnly sound is working and no other button is working ,cd is working fine but cant acces the radio as no other button is working

Did you also use an antena adapter? If not you may need one. Original in the vehicle is small and can pop out from the radio.

Shut it off then hold the function button, cycle through till you find your option to turn it on, the turn the radio back on and use you source button to change to CD, TUNER, and AUX

turn off the radio then press the clock button. now pressing for about three seconds the function button then the clock should appear on the screen.

did you turned aux function?

turn off your player by pressing and holding volume controler.
press and hold longer (~5 sec) it again to turn it on (you should see 'tuner' in the lcd).
push up arrow to select aux and right/left to turn it on.

now you can connect your ipod and select aux (as ussual switching between tuner/cd player/aux)

cheers :)