Help with an old Alpine head unit

[Christien]

The 87 cab I just bought has an Alpine 7517 head unit. From what I understand these were early-90s units. I bought an 8-pin MBUS to 1/8" to hook up my phone, but it's not recognizing it. From what I've read, it should be universal, though it needs to be put in aux mode. However my unit has no setup button, just a CD selector, which does nothing.

Does anyone have a manual for this model? Or familiarity with it? I suspect I might be SOL, which isn't a big deal - the cable was $5. But I'd rather not buy another head unit if I don't have to.

Thanks.

[Rtrorkt]

Search Results : Owner-Manuals.com, Service Manuals, User Manuals, Repair Manuals
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[Christien]

That's not an alpine 7157, it's something else.

[pc100porsche]

I don't have Manual but here's a pic of the Radio -- might jog someone memory :

[Eric Coffey]

Originally Posted by Christien

The 87 cab I just bought has an Alpine 7517 head unit. From what I understand these were early-90s units. I bought an 8-pin MBUS to 1/8" to hook up my phone, but it's not recognizing it. From what I've read, it should be universal, though it needs to be put in aux mode. However my unit has no setup button, just a CD selector, which does nothing.

Does anyone have a manual for this model? Or familiarity with it? I suspect I might be SOL, which isn't a big deal - the cable was $5. But I'd rather not buy another head unit if I don't have to.

Thanks.

Yeah, I think you are SOL. I could be wrong, but I think that model is just too old for the M-BUS adapter to work. I am pretty sure you need one of the later models with the ability to change the CD Changer source to "AUX" mode.

[JD159]

Is your goal just to listen to AUX? Why not get the cassette to aux adapter tape.

[Christien]

Originally Posted by Eric Coffey

Yeah, I think you are SOL. I could be wrong, but I think that model is just too old for the M-BUS adapter to work. I am pretty sure you need one of the later models with the ability to change the CD Changer source to "AUX" mode.

From what I've read, the "cd" button should serve the same function as an aux button, but who knows if that's right.

Originally Posted by JD159

Is your goal just to listen to AUX? Why not get the cassette to aux adapter tape.

Poor sound quality, and I hate having a wire always dangling out the front of the dash.

[nightheart]

I highly doubt anything that old has an AUX port. You can buy head units without a CD player that have bluetooth and AUX ports for 30 bucks for a cheap POS from walmart to name brand ones at 75+. I'd just get another one. The other option is you can get a Chinese made FM adapter on ebay for under 10 bucks that runs through the FM radio. Obviously with that, sound quality takes a hit, but they have bluetooth and AUX ports.

[Eric Coffey]

Originally Posted by nightheart

I highly doubt anything that old has an AUX port.

You are correct, but that is not the issue here. The OP stated he bought an M-BUS adapter. A lot of the older head-units with CD changer controls use an M-BUS connecter for the changer, which can be used (via the aforementioned adapter) to connect a phone/mp3 player in place of the CD changer. However, it only works if everything "plays nice" together.