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- From: jeh@cmkrnl.com
- Newsgroups: rec.audio.car
- Subject: Re: Sony Changer Compatibility
- Message-ID: <1992Nov20.182814.900@cmkrnl.com>
- Date: 20 Nov 92 18:28:14 PST
- References: <CMM.0.90.4.722179090.clane@magnus.acs.ohio-state.edu> <1992Nov19.232152.7001@wdl.loral.com>
- Organization: Kernel Mode Consulting, San Diego, CA
- Lines: 48
-
- In article <1992Nov19.232152.7001@wdl.loral.com>, trw@spl1.spl.loral.com
- (Tim R Witort) writes:
- > In article <CMM.0.90.4.722179090.clane@magnus.acs.ohio-state.edu>, clane@magnus.acs.ohio-state.edu (bored-out-of-my-skull) writes:
- > |> So Sony isnt making the changers that will work with the XR series anymore?
- > |>
- > |> I was just going to ask that, [expletive]! I suppose when I graduate and get a
- > |> real car i will have to buy another stereo...........
-
- Do I detect crocodile tears here? "Oh, drat, I'll just HAVE to get another
- [better, more features, more reliable, ...] stereo."
-
- > Good point. Are the new "U" serires Sony CD changers
- > compatible with their controllers that control the older
- > "X" series? I wouldn't expect all of the nifty new features
- > of the "U" series to work, but would the standard old
- > features work? I have the Sony car DAT deck which can
- > control an "X" series CD changer - but will it control the
- > new "U" series?
-
- I don't want to say "definitely not" -- it's a little bit difficult to prove
- that the necessary adapter doesn't exist and will never exist -- but I think
- it's pretty unlikely: The connectors don't match. Worse, the functions of
- the pins in the connector don't match. Not anywhere close, in fact.
-
- The old "X" series have an cable with about a dozen pins in the connector. I
- got a look at the connector for the U-series changer (a Dow Stereo sales droid
- tried to sell me one to go with my XR-7280). The connector looks similar from
- a distance, but close up it appeared that there were just two (2) pins!
-
- I'm not sure how they're multiplexing two channels of audio plus control
- signals to and from the changer PLUS power on two wires (plus the shield)... I
- suppose that using "phantom power" techniques and putting the control signals
- on carriers above the audio band would do it. Heck, the audio could be riding
- on a carrier for that matter -- Sony has chips to encode stereo audio on a 200
- kHz or so carrier and to decode it back again; these are used in their infrared
- headphones. They could be doing the same thing here, just eliminating the IR
- part.
-
- However it works, it's surely a different signalling scheme than the X series
- uses, so forget about hooking one to the other with a simple cable adapter.
-
- Of course I could be wrong. Don't rush out and buy a new head unit on my
- advice alone! I suppose the best thing to do would be to call Sony and ask
- them if an adapter is available. Let us know what you find out.
-
- --- Jamie Hanrahan, Kernel Mode Consulting, San Diego CA
- Internet: jeh@cmkrnl.com, hanrahan@eisner.decus.org, or jeh@crash.cts.com
- Uucp: ...{crash,eisner,uunet}!cmkrnl!jeh
-