Does not switch to Ext Input

aux is when you have an external audio plugged into . like ext cd or radio or phone or phone or mp3 player.
when switched to aux input all functions on front are same.

you have to change it from the Aux setting to CD when you want to play cd, some cd players switch to aux. automatically when you plug inthe aux. cable. and may have to be unplugged when playing cd.

Hi there,
1. Press and hold SEL till the preferred setting mode (PSM) comes up. 2. Scroll through the modes till you see EXT IN (You may need to set CD as the Source to see this.) 3. Adjust the value by moving the knob around the SEL button. 4. You should now see LINE IN.
Good Luck
And let me know how you went?

If your Kenwood has an AUX input then you can connect a audio cable from the headphone connector on the Zune to the the AUX input on the Kenwood. Power up the Zune ans set it to music and switch the Kenwood to AUX.

There's nothing to it--look 'inside' the connector and you'll see three metal contacts close the metal connector (somewhat similar design as a USB jack). The center is common for the line out, and the left/right are the positive for the left and right channels. The metal connector itself is not part of the circuit.
So if you were connecting RCA jacks to it, the outer ('negative') of both RCAs connects to the center contact on the KS-U57, and the center ('positive,' or 'signal') of the left and right RCAs go to the contacts bracketing the center.
KS-U58 and KS-U57 are wired the same.

Just installed a 'generic' KS-U57 (same as the KS-U58, but terminates in a RCA, $7 on ebay) that has the same black box--except I cracked the black box open and found that it is empty (only contains soldered connections). I imagine that the authentic JVC is the same.
I have a noise problem (engine static), but it is because my mp3 player is charged by the cigarette lighter--unplugging it eliminates the noise, so as far as I can tell, there is no need for a noise filter inside the KS-U57.

You should be able to do that as long as you have the right cable.

Most of the mp3 players have a "mini-stereo" jack (3.5mm) and some car stereos have the same type of jack for "aux" input, and others car stereos have RCA jacks for the "aux" input.

Even if the jacks are not the same type, you can use an adapter cable that converts the mini-stereo jack to an RCA jack. You can find them at many places like Best Buy, Circuit City or Radio Shack.

Depending on the type of car stereo you have, you would normally press the source button to change between the tuner, cd player, aux or whatever you may have connected to the stereo. You may even have a seperate button to press for the "aux" input.

I hope this was helpful to you, if you need more information just ask, and please give more info on the type of mp3 player and the make and model number of the car stereo.

you have to switch your decks source to AUX and it should work fine. If not you may have a bum player with a bad input.

You could try using an FM transmitter which plugs into the earphone jack on your Mp3 player, then all you have to do is tune the radio to pick up the transmitters frequency.