Alpine Cd Changer Pinout - diyAudio
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Old 27th June 2007, 03:43 AM   #1
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Default Alpine Cd Changer Pinout

OK Alpine gurus, here's a good one: I have a 7618 HU that has both the 8-pin DIN connector and RCAs for the cd changer input. I want to be able to disable the L&R signals coming through the DIN connector and activate the RCA inputs instead. The reason id that I want to be able to connect them to the L+R outputs of a DVD player for a Mobile theater.

So my question is this: Which pin do I play with to do this? And what do I do? Pull it up to V+? Ground it? Pull up with a resistor? Ground w/resistor? Help! Thanks a bunch!

Steve
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Old 24th July 2007, 09:20 AM   #2
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Hi, I don't know if it is as simple as that but I would love to know myself if you find out.....
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Old 25th July 2007, 06:48 PM   #3
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http://pinouts.ru/Home/alpine_cdchanger_pinout.shtml

you can always buy an 8 pin DIN connector and use those inputs directly, too . Just in case the radio is looking for the DIN signal rather than the RCA signal.
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Old 26th July 2007, 03:38 AM   #4
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Originally posted by...ME!: So my question is this: Which pin do I play with to do this? And what do I do? Pull it up to V+? Ground it? Pull up with a resistor? Ground w/resistor? Help! Thanks a bunch! ]


I guess I need to clarify my question: Which pin do I play with? The Data-bus Pin? Leave the L & R inputs open? (assuming the head unit's input section can auto-sense which inputs are being use and switch accordingly).

I am clear on the pin-out of the 8-pin DIN connector, just not clear on which pin to use? (and how to use it: pull-up, pull-up w/resistance, pull-down, or pull-down w/resistance, or leave open).
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Old 26th July 2007, 04:10 AM   #5
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First and foremost, I would investigate the function of the unmodified alpine unit. Does it allow for source switching without a source attached? Or is only CD and radio enabled without a CD changer hooked up?

If you can select a CD changer source or an AUX source, then it should be much easier than performing deeper modifications.

I know that for some older radios, external sources must be selected in a menu rather than an "autosensing" kind of feature.
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Old 26th July 2007, 08:37 AM   #6
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I personally have the 7620 which is the upper model to the unit you are trying to use and as I said above I don't think it will work with the method that you are proposing but if it proves possible I would love to know how.....
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Old 26th July 2007, 06:27 PM   #7
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White-

I assume you mean "Tape and radio" w/o the cd changer connected (as opposed to "CD and radio", right? If so, you are correct: the CD functions are not available when the changer is disconnected.

Juice-

What is a 7620? I have never seen this model. I know that Alpine was famous for coming out with some pretty kicka$$ models and not advertising them. Result, no on e bought them because they didn't know that they existed. Do you have and pics of them? if so, please please please post or send me an email.

guys-

I have come up with a stop-gap idea: place a switchbox inline with the changer feed to the head unit. Allowing all the lines EXCEPT the L, R, and Signal GND pass through, I would switch these lines with aux L&R RCA jacks, where I could feed in anything (DVD, MP3, etc.). Since this tap is before the volume & tone controls, it would be just like another input source. Thoughts?
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Old 28th July 2007, 04:26 AM   #8
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The 7620 is the model above the 7618 and looks very similar in appearance and I have seen quite a few of these units in the comp seen when they were current.
I know people in the industry that still regard this model as the best radio/cassette that Alpine ever made!!!
I will see if I can dig up a pic, I still have the catalogue of this series showing both models.
With your idea I think that you would need to have cd's loaded in the changer and spinning for it to work but try it and find out and post your results.
Cheers, Junglejuice...
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Old 28th July 2007, 05:46 AM   #9
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Yup. Will do. May take some time, though, 'cuz it will mean doing a pc board, and all the components on it, too.
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Old 29th July 2007, 07:41 PM   #10
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I'll look into it tomorrow, I have a 7618r running with a 5957s changer and a 3900 dac. (Just got hold of a Momo/Alpine steering wheel too - remember the one with the remote in its centre?

It's in the wifes car, and she is back tomorrow, so I'll have a play around then, I do remember a blitzsafe adaptor I have doing something I just want to check which one!

Rod.
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