e-nigma wrote:
"Matt Ion" wrote in message
news:Ien6h.315687$5R2.307249@pd7urf3no...
wrote:
I finally got hold of a schematic (PDF file) for that car stereo which
I'm trying to use its CD-changer input for my MP3 player.
http://www.esnips.com/web/no-spam2-files
Anyone knowledgable in electronics who can figure out how this can be
done?
I just want to connect the headphone output from my MP3 player into the
car stereo without having to use a cassette adapter as I'm using now.
Looks like pins 1 and 3 are your CD in right and left, and pins 2 and 4
are ground (use either or both).
Easiest way is probably to pick up a headphone extension cable and a male
DIN plug to fit the back of the deck; cut the female end off the
extension, and solder as appropriate into the DIN plug - red is typically
right+, white or black is left+, and the shield is ground.
I agree with that, but pin 4 or 5 may have to be triggered somehow to tell
the unit to switch to changer input.
or 4 and/or 5, and/or 6 might have to have a load on them before it will
switch.
Or do you think that just pressing the changer button on unit will activate
changer input?
I know a lot of new unit want to see a load before it switches to changer
input.
Well, pin 6 connects to one of the ouputs of IC861, which is a line-driver and
labeled "CH. CONTROL" (changer control?); I would guess that outputs the control
signal TO the changer.
Pin 4 is tied to the ground along with pin 2 - basically looks like 1/2 are one
input pair, and 3/4 are the other pair.
Pin 5 is +12V to the changer - it probably either uses this to POWER the changer
(unlikely), or merely as a remote-turn-on (more likely).
The only other pin that's used is 7, and it appears to connect to a buss line to
the main controller... MAY be an input trigger to tell the deck that the changer
is present and to allow the input to switch to the DIN jack.
I'd say, if just wiring up the audio lines doesn't allow the input switch, try
grounding pin 7 first, and if that doesn't work, then try giving it 12V power,
but honestly, I don't think it'll be necessary.