Pioneer AVIC N4 ste...

update the firmware for cdj200 from the following link

http://www.pioneer.eu/eur/content/support/support/upgrade.html

Then connect your I-pod it should work fine.
Let me know the status.

Regards
Maanita

Try using a universal dock attached to the AVIC N4 and the ipod jack right into the universal dock. Hopefully that should work..

Or try THIS from Apple. The Composite AV Cable connects to your iPod, iPhone, or Universal Dock via the 30-pin dock connector and to your TV, home theater receiver, or stereo receiver via the composite video and red/white analog audio ports. The cable also features a USB connector that you can plug into a power source, such as a computer or the included USB Power Adapter. (according to the site)

as other expert are saying
Please contact the vendor or the manufacture for the defect,I think that your device is in warranty if so then the vendor can replace it or repair it
good luck

ERROR AO - the error is Electrical or Mechanical cause

I would recommend you have a tech check it out. Possibly a loose connection or other setup wrong, hard to say from here.

HI,

I know it means "electrical or mechanical problem" according to the manual. You probably are not able to read or even eject a CD. There is no solution offerred, so you will have to get professional help.

I will suggest first contacting Pioneer at www.pioneerelectronics.com, email or call tech support. Read the online user manual also if you don't have one. They might refer you to a local repair shop, and you can always try to get help from whoever installs the unit for you or you have bought it from.

Sorry that I won't have further knowledge on this. My instinct will be to disconnect the power completely and see if it resets.

Goodluck,
Please don't forget to rate or accept the solution