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| csidresal |
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Posted: 29 Mar 2023, 06:35
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Posting this for future reference in case anyone wants to also add AC3 to their CLD D503.
Got the actual board from a member here, ldstl
Kit included:
Board -completly pre wired
RCA Jack
Ground wire with .1uF cap
AC3 RF label for the back
Very detailed instructions
RF Tap point
https://i.imgur.io/zoltyt2_d.webp?maxwidth=640&shape=thumb&fidelity=medium
Voltages you'll need: +5 volts, Ground, -5 volts
https://i.imgur.io/n4Mdyj7_d.webp?maxwidth=640&shape=thumb&fidelity=medium
Here they are zoomed out:
https://i.imgur.io/hocicNQ_d.webp?maxwidth=640&shape=thumb&fidelity=medium
Basically just 4 wires that go to the LD board (a couple more later for the RCA Jack)
RF
+5 Volts
Ground (0 volts)
-5 volts
Zoomed in. I soldered it poorly just to make everyone feel better lol. Best I could do!
https://i.imgur.io/XLHRxcI_d.webp?maxwidth=640&shape=thumb&fidelity=medium
https://i.imgur.io/ZA2vIqw_d.webp?maxwidth=640&shape=thumb&fidelity=medium
Then the mod board has 2 wires that go to the RCA Jack.
Then run a ground down to a ground screw. You put the .1uF cap between the ground wire and ground screw.
https://i.imgur.io/nWhyRsA_d.webp?maxwidth=640&shape=thumb&fidelity=medium
Zip ties to clean it up
https://i.imgur.io/p5JFXpb_d.webp?maxwidth=640&shape=thumb&fidelity=medium
The hole I drilled in the back is 3/8". I made a sort of upside down blanket of electrical tape on the inside to catch all the metal shavings. I was really careful with part. Then made a sort of igloo of tape. Didn't get pictures of this. But did catch all the shavings.
https://i.imgur.io/sLW2Zvo_d.webp?maxwidth=640&shape=thumb&fidelity=medium
https://i.imgur.io/jGpFoi2_d.webp?maxwidth=640&shape=thumb&fidelity=medium
Big thank you to ldstl for getting the board to me so fast, including everything, and offering all the support.
Yes, works great! AC3 lock first disc I tried. Very exciting. Tested also regular old analog discs too just to make sure I didn't accidentally break something and no problems, regular analog sounds fine.
Next is to maybe add Toslink (tried and failed so far) and then get 16:9 to work lol
https://i.imgur.io/prCBBRq_d.webp?maxwidth=640&shape=thumb&fidelity=medium |
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| csidresal |
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Posted: 05 Apr 2023, 22:41
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As I mentioned in that thread awhile back, the only way to tap the digital output is to go directly to the DSP IC. This is the IC and pin that you would need to extract the signal from.....
https://i.vgy.me/bRUm4J.png
The difficult part of getting to this chip is that it's on the downward facing side of the main board which means you need to remove the board from the player to get to it. If you feel comfortable doing that, then it shouldn't be difficult. You just need to make sure to find a good opening to get the coax cable back to the top side of the board. Also, I don't think there is a trace that leads out from pin 43 so you might need to solder directly to that very tiny leg (not something I would be comfortable doing myself).
Okay, thanks! I didn't realize from reading that thread if that was definitive or not, or if there was still hope there was some place 43 came through. Good to know and I appreciate you confirming. I had tried following the service manual and thought I found a jumper, but yeah no I was wrong and it didn't work of course. Hard to follow those traces even zoomed in at my age :)
It's strange from the optical cut out that 5 volt and Ground are connected (I believe from my testing). I wonder why they would have left the trace to 43 unconnected. Oh well.
Yeah, I probably won't attempt it at least for a while. Don't want to risk any damage as my player is working great. Plus I guess I would really only use it for DTS discs and I don't own any anyway. For normal discs RCA is fine since you can switch between digital and analog, I believe you lose that with Toslink/SPDIF so...
AC3 mod was for sure much easier and has really added a lot to the enjoyment of so many of the discs I already have.
Thanks again to ldstl, originally came across his AC3 mod board in this thread: https://forum.lddb.com/viewtopic.php?f=53&t=10326 |
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| csidresal |
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Posted: 15 Jun 2023, 22:51
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I'll just add a couple thins from my experience and some that are anecdotal so take them for what they're worth.
As far as manually turning CX off. In my experience from a couple Pioneer players I've owned including a CLD-D503, you have "old" discs pre-1985 mostly that are Analog only and then you have discs that have Digital and Analog soundtracks. So the D/A button on the remote will turn CX on and off only on the old Analog only. Discs. If the discs has Digital and Analog it just switch between Analog and Digital. If you have an old Analog only disc give it a try it's fun to hear what CX actually does. Definitely takes away a lot of noise.
As far as Analog being "better" than Digital, yeah obviously not spec wise. Digital/CD 'can be' amazing! But look at Duran Duran was PA-83-044, Analog only. The audio on that disc is from the 1/2" master that used a DBX 150 I believe which basically doubled the dynamic range to a total of 115db something that digital systems were just starting to be able to do. According to the person on LDDB he also agrees the CD was inferior. (Later CD re-releases were improved of course) But it is possible the Analog tracks could have a better transfer than what is on digital.
Same with some of the Police/Sting discs I have. Some of the analog tracks for me sound amazing. I know Digital/CD was notorious for a time for having bad digital transfers that compressed everything from the original master recordings. Not that much of an expert the analog tracks on some of the videos you can hear more of the high notes of the guitar and high hats. At least seems like it when I've played around switching back and forth. Again, that doesn't mean I believe Analog is better, no I firmly believe Digital/CD is basically overkill almost for what my ears. But it comes down to the who, how or where the transfer came from. For movies I would guess Analog is a downgrade most times, but for older movies where the original soundtrack was analog? I don't know. Again, depends if they over compressed the digital version and maybe just dumped the original analog. Maybe the more untouched analog could sound better in some ways? I'm sure they're are people that know a lot about sound tracks and things, which I don't but I do find interesting. |
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