I have installed the 7892 in an older BMW with good speakers for all 4 channels. All lights are fine,CD plays, radio plays both with low power and high distortion on all 4 channels, The top of the unit around the output IC area is VERY hot and remains so even with the speakers disconnected. What oh what can the problem be?
Certainly, the output IC might need to be replaced, also check to see if there is a factory amp somewhere in the car.
Additionally, double-checking the wiring is a must.
How long does it take for the unit to heat up?
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You have to bypass your entire factory system, it takes some customizing and careful installation, too much information to write over Fix Ya advice, phone or actual physical support in a car stereo shop is your best bet.
You may have your speakers wires shorting out somewhere. Try to isolate each channel till you find the one that is shorted out. It is all a case of trial and error. As long as you do not remove the power wire or the constant wire then you can troubleshoot your speaker without causing any harm. Usually there is factory sticker on the underside that says what speakers are which and what channel they are (left front, left rear and so on. Let me know if this helps if not there are more things you can try
If the sound is coming out clearly with the radio on, then there is a problem with the cd drive or its connections. If your stereo has aux. inputs, you could run an mp3 player until your ready to replace it.
Try resetting it. Also if it won't reset using the reset button found behind the faceplate. Take off the negative battery cable under the hood this should reset everthing. Then replace it. If it is old and the motor is having trouble kicking the cd out then stick a used no good cd in on top of the other cd and use it to apply pressure to the cd in the player then pull it out after pressing eject
Chips fail, even for the best of us! If the preamp outputs are still fine, you can purchase a small 4 channel from Alpine for 100-150. About the same as a repair yet cleaner power. Check EBAY there's always good deals to be had!
Hope this helps
Hve you checked the mute button??? if so then it needs to see a pro as this is a great unit so it should be serviced only by a great tech. I simply love the alpine seris!!!!!great choice in car audio man!