Question about Car Audio Receivers
I just bought a cable to connect my 30gb ipod video to my pioneer deh-7800mp cd player. i plugged the cable into my ipod and in the built in aux. in the back of my cd player and when i turn my ipod on and attempt to play music nothing comes out. what do i need to do to solve this? is there a place where i gotta sync the two devices together?
VERY SIMPLE SOLUTION FOR DEH-P5800MP!!!!!!
Turn unit off by holding the Source (volume knob) button until power is off.
Now, hold down the Function button (FUNC) until the unit turns on. You will now be in the Initial Settings menu, a special menu. Press the Function button (FUNC) again until you see the word AUX, press up to enable it, then press the Source (volume knob) button until you see AUX. It works now, congratulations.
Posted on May 25, 2009
You definitely can wire an auxiliary input into a pioneer DEH-1400. The
design of this unit is highly modular and thanks to the engineers who
designed it there is an easy, straightforward way to add an aux input
to the unit. The way to do it is to decouple the the AM/FM receiver
stage from the volume control/Amplifier stage and inject your MP3 audio
signal there. If you have experience taking things apart, know how to
use a soldering iron and are good at basic electronic wiring you can do
it. It does take some time but for me, it was worth it.
Look for and down load the service manual for the deh-1400. I saw it on a number of sites and at least one of them lets you D/L for free. This has a schematic and will help you understand everything described here.
There are spare (unused) line level audio inputs to the Volume control (VC) chip but I was concerned that I would have to somehow re-program or spoof the system controller to tell the VC chip that the spare is being used, so instead I just decoupled the AM/FM receiver line stage from the VC chip. This is easily done by desoldering and removing jumpers JP96 and JP100 from the circuit board. You will see the jumpers when you take the unit apart, they aren't shown on the schematic or labled on the PWB layout drawing. These jumpers connect the FM line out to the input side to C311 and C312. Once the jumpers are removed, you now have a usable stereo line level input to the VC chip that utilizes all of the audio equalization and amplification features of the unit.
So how do you select between AM/FM source and Aux. input source you ask? Well, I just took the brute force approach and wired in miniature Double Pole, Double Throw (DPDT) Switch. One position joins the FM stage to the VC chip (like the jumpers previously did) and the other position connects the Aux. input to the VC chip. A convenient space near the head unit (on my 15 year old truck) was available on my dash to mount the switch and 3.5 mm stereo input jack. (sweet).
Another way to do it is to use a 3.5mm input jack that has normally closed connections which open when the plug is inserted the Aux. jack (like GC electronics part number 30-574). (this saves a second hole in the dash and a switch that you have to flip).
I used twisted, shielded pair wiring for all wiring, (shield used for audio ground) I enlarged an existing hole on the back of the sound deck (between the heat sink and the line out jacks) to run the wiring out. I picked up audio ground at the ground jumper for the VC chip (were C307 and C309 are connected in common). The solution sounds great and works good. Just run the radio in FM mode, plug in your MP3 to the Aux. Jack and ignore the tuning display. (or tell yourself "wow, every station is getting music I like ... and commercial free too!)
Notes on Input volume level setting and input impedance: If you are plugging your mp3 player directly into the Aux. jack you will probably notice that you should adjust the volume level on the mp3 player in order to match the volume level that is fed from the AM/FM receiver to avoid a sudden change in volume level when switching between sources. If you are getting fancy (like I did) and putting a docking station into your vehicle or you just don't want someone plugging in their mp3 player at max volume and making you have to then turn the radio volume down, you should put an attenuator circuit in line with the Aux. input. The attenuator circuit that I used is a simple home made (dual for Left/Right) resistor divider network. I used the same resistor values that pioneer used in their design coming out of the AM/FM receiver stage. (2.7K Ohm for the series elements, 1.6K Ohm for the shunt elements) I used 1/4 W, 2% metal film resistors. This will provide approx. 4.3dB of attenuation and should match the line level out of your MP3 (or the earbud out at max volume setting) to the volume level sent out by the FM stage thus allowing smoother volume transition when you plug the MP3 player in. The resistors also provide some isolation/matching between the (relatively) low impedance of your MP3 output and the VC chip. (The attenuator is really optional but I like having the volume levels matched when I move between sources).
Good Luck, worked for me.
Posted on Aug 25, 2008
You don't have an auxillary input for that head unit.
Posted on May 31, 2008
I had the same problem, getting no output from my Ipod after connecting to the AUX port... on the cd5000 I had to press and hold the cd button thus activating the aux input.... good luck!
Posted on May 04, 2008
In my kenwood KDC-MP3035 i press the SRC button which is supposed to give me an option of aux, cd, tuner, standby, etc. But it doesnt give me an aux option only the cd, tuner, and standby. Whats going on
Posted on Jan 14, 2008
So how do u fix the first guys problem, i hav the same thing where the radio works fine but once i put in a cd, its read and it identifies the cd and plays it but i dont hear n e thing, i also tried the aux input for my ipod, the aux was an RCA jack but i still heard nothing
Posted on Jun 19, 2009
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