My head unit is an old Pioneer KEH-P1015 with 4 speakers attached to it and a 6 disc pioneer CD changer. Before the problem occured, one of the rear speakers (rear right 6x9 speaker) is not putting out sound.
The symptom is a ticking sound, that sounded like a loose wire rubbing on something. The sound is coming out of the speakers while the music is playing. If I turn the head unit off and turn it back on, the front panel lights will turn on but no sound coming out. I tested the unit with the engine off and still the same ticking sound.
I checked if there is a loose wiring, rewired the speakers to the head unit but the problem returned after about 5-7 minutes of playing while the car is running.
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I am assuming you are talking about the tape deck (head unit) and not the changer. You more than likely have burned out bulbs in the face. Unless you are good at desoldering and soldering, I would suggest you have them replaced professionally.
manual should have a list of error codes ,pioneers pretty ok like that , u can call them direct , meantime make sure disc is clean ,try store bought disc , not burned ones , sounds like a mechanical faliure , if unit was recently shipped to you , it may have required "transport "screws . disc tray may have slid into playing area inside unit .
as per pioneer site there is no model with number KEH4950,so how do i guide you ?
generally clock setting on pioneer sets( latest ones )is as follows:1)turn the car ignition ON (2)press multicontrol until display shows the blinking clock.(3)use multicontrol (press left or right to control hour or minute segments.(4)press multicontrol again to finalise and start the clock .