Today's Message Index:
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1. 07:42 PM - Re: Various hackery (XDP-210EQ) (Ethan)
2. 10:03 PM - Re: Various hackery (XDP-210EQ) (Roland M)
3. 10:15 PM - Re: Various hackery (XDP-210EQ) (Roland M)
Message 1
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| Subject: | Various hackery (XDP-210EQ) |
--> XDP4000X-List message posted by: Ethan <telmnstr@757.org>
> Unfortunately I don't have a service manual for the XT-40V, but here's
> one for the XA-U40D just for fun:
> http://www.matronics.com/xdp-4000x/XA-U40DServiceManual.pdf
> Best Regards,
> Matt Dralle
Is that incomplete? I notice there are no schematic diagrams, but it does
have the chip? Or is the chip the only thing in there?
Is that chip (the uPD75004GB-749-3B4) the same IC found in the other
source selectors?
Message 2
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| Subject: | Various hackery (XDP-210EQ) |
--> XDP4000X-List message posted by: "Roland M" <mdx400@hotmail.com>
>--> XDP4000X-List message posted by: Ethan <telmnstr@757.org>
> > All analog-only changers and analog-only HUs have their firmware code
> > permanently set to "ANALOG OUTPUT" mode which means whenever you switch
>to
> > one of these sources on the UniLink bus the XDP will "expect" that the
> > signal will be analog and disable the digital input(s).
>
>Did you work for Sony or repair them? Are you positive they don't reuse
>the master controller IC in multiple models, just leaving the digital
>switch pin disconnected? This was my hope, to convert a analog only
>changer like the CDX757MX (might be wrong model) to support digital output
>without filtering the unilink bus data.
>
haha, no I never worked for Sony or [professionally] repaired stuff. What I
meant however wasn't that the IC was permanently set to analog, just that
the changer is physically [to the normal user], "permanently" set that way.
I'm pretty sure doing what you propose *would* work, and by tinkering you
could get the changer to change to digital out mode.
>I really wish I could turn on digital input for the XT-40V too :-(
Yeah that is a tough one, but why is that important? (Out of curiousity)
For DVD playback? (Keep in mind you'd only be able to use a PCM-converted
(2-ch) stream in the case of DVD playback. Meaning Dolby Digital would be
fine if you set the player to PCM/2ch, but DTS would not unless the player
had a built in DTS decoder (i.e. has 6 ch. analog out as well).)
>Schematics would be good enough :-) The C30 uses relays?
Yep it sure it does... For one thing I've taken apart my Blaupunkt
CDC-BRIDGE (identical/interchangeable with the XA-U40 (analog) MCA in case
you were wondering) and seen the relays in there.
Something has to change what analog input RCA pair is going to the output
pair! Secondly, though I don't use the RCAs on it because I only have one
analog device (T60) connected to it anyway (828 goes to CHANGER digital in;
MDX-400 goes to MASTER digital in and it works fine, surprisingly), I can
hear the relays clicking everytime I change sources/changers. So I would
assume the C30 also has to use relays to accomplish audio switching.
Roland M.
Message 3
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| Subject: | Various hackery (XDP-210EQ) |
--> XDP4000X-List message posted by: "Roland M" <mdx400@hotmail.com>
>--> XDP4000X-List message posted by: dralle@matronics.com (Matt Dralle)
>
>Yes, any of the Sony car changers only output light when the changer
>is actually playing. Otherwise, the LED output is turned off.
This is true, but with one small "caveat"... The LED output on any changer
I've used is ON whenever the changer is *active* period. It doesn't matter
if it is the active source selected, only if it is doing *something*. That
is, if you put in a cartridge and it starts checking the discs for presence
and CustomFile info, the changer WILL have its optical out on, eventhough it
is outputting mute. Also if the changer is moving the mechanism to the rest
position after it has been turned off/the source switched, it will still
have its output on until it is *completely* inactive.
So, if you went from one changer to another and both were hooked up to the
same digital input (could be accomplished with a passive optical combiner if
we're only talking about 2 devices) there would be a period where both
inputs would be on. The output of the changer still going to rest and the
one of the newly activated changer. This would create a "mute-gap" because
of the garble on the optical line, for a few moments, until the other turned
off completely. The time of this gap will depend on what disc the "dead"
changer was on (how long it takes it to get back to the rest position).
Also don't insert a new cartridge into the one changer while the other is
playing because you'll have to wait for the changer to check all the discs
before it turns off its output, creating a rather lengthy period where you
cannot effectively use the digital input!
Roland M.
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