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Posted on May 14, 2009

Alpine cde-7872 head unit

The speaker leads on this head unit have no sound,,,

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  • Contributor 13 Answers
  • Posted on Jun 07, 2009
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Joined: Jun 07, 2009
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They are blown, either have them fixed or buy another head unit or the best way is to just use the RCA outputs from the head unit

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No audio even though sterio wires are all connected

My 1997 Alpine CDE-7828's wiring schematic doesn't disclose one important thing for many older and possibly even some newer sterios (aka 'head units'). If all wires are connected per the sterio's schematic andf sound is missing, you probably have a dedicated pin on yout vehicle's harness/connector that will read something like 'Turn-on AMP signal", <br />until you jumper the ignition hot lead (between the harness plug and your sterio) to your vehicle's 'Turn-on AMP signal' pin/connector wire (add a wire if none is supplied in your vehicle's connector), you won't get any sound even though all the other wires are connected per your head unit''s instructions.
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Alpine 9845 cde head unit car stereo i Cannot figure out how to access the Fader not the balance,altho i havent seen that function either. ive been to the alpine site and they dont even mention it. im sure...

Press the Rotary encoder (CDE-9845/CDE-9843
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My Alpine CDE 7872 faceplate goes blank intermittently, the unit still functions, just can't see what station you are on, what track, volume, etc...

is the faceplate detachable? if so remove it and clean the metal contacts on both the din unit itself and the faceplate with rubbing alcohol on a cotton swab or Q tip.

if it is not a detachable face, then i would say an internal solder joint is starting to come loose, that is an older alpine model number after all.
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Subwoofer for alpine cde-9843

In short, no.

The CDE-9843 cannot drive a sub of the type you mention without an amp, but you can fit a sub with it's own built-in amp.

As standard, the head unit has a basic in-built amp supplying 4 x 16w RMS at 4ohms but there is the facility via the unit's own menu to turn off the in built amp and use the output sockets as a pre-amp feed, but in reality if you want to drive an amp you'd be better off to start with a more highly specified head unit to begin with, even the next model up, the CDE-9845 is better suited as there are pre-outs for front and rear speakers.

User instructions are available from here.

If my reply has been of assistance then please return the favour by rating my answer.
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The DC error is most likely caused by a shorted or grounded speaker wire. Check all speaker wires, correct the problem, and then go into the sound setup settings and reset the POWER IC to ON.

Hope this helps.
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Removal of my Alpine CDE-7872 from my 1998 Dodge Neon

Hi there,

it sounds like your trying to remove the cage that holds the CD player in, you need to slide to small flat screen drives either side of the unit between the cage and the unit, then remove the cage after.


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I have a CDE-9872 and it wont pick up my ipod touch

Add Alpine's optional "Full Speed" connection cable and you'll be able to use the CDE-9872 to control your iPod. -Crutchfields website

This is compatible with first and second generation iPods touch.
fyi- if you have a mini-stereo aux in jack on the deck you can connect a ipod touch compatible mini stereo cable to the earphone jack of your ipod.
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Check the leads from the heat sink on the back and my guess is the contacts between the faceplate and the actual head unit are not doing so well. This is a detachable face unit right?
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