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ldfan
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Post subject: Re: Lexicon LDD-1 AC-3 Unit - just curious Posted: 15 Feb 2019, 03:48 |
Hardcore fan |
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Joined: 28 Jun 2014, 05:59 Posts: 1454 Location: San Francisco, CA USA Has thanked: 422 times Been thanked: 533 times
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admin wrote: It was supposed to be optimized based on the players
Julien Hmmm....wonder if they mean the voltage level of the AC3-RF signal since it can vary from 3.6 to 4.5 volts? Or maybe something different.
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miskia
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Post subject: Re: Lexicon LDD-1 AC-3 Unit - just curious Posted: 25 Apr 2019, 19:49 |
Genuinely interested |
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Joined: 29 Dec 2018, 10:33 Posts: 35 Location: Belgium Has thanked: 1 time Been thanked: 10 times
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I ordered a LDD-1 few days ago, approximative 150€, less than some Yamaha demod I saw, but this one have the "auto switch" I was looking for (like the Pioneer RFD-1). But I already opened the beast... I need a Toslink optical SPDIF output, so I'll modify the PCB to add this functionnality. I'd like to have an internal 230V power supply and also modify the "control" fonctionnality to have a 12V trigger in a minijack to power the beast with my AVR 12V trigger output. I'll probably put the circuit in an other box than the original rack mounting one. Just need some times
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admin
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Post subject: Re: Lexicon LDD-1 AC-3 Unit - just curious Posted: 20 Apr 2021, 11:03 |
Site Admin |
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Joined: 07 Aug 2002, 23:37 Posts: 4549 Location: Tokyo Has thanked: 294 times Been thanked: 1144 times
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miskia wrote: Just need some times Did you ever customize your LDD-1? I'd be interested in the 12V trigger (using pin 2 GND and pin 3 Trigger of the PWR CTRL DIN?). Julien
_________________ HARDWARE DATABASE HLD-X0/9 LD-S9 OPPO 105/205 SL-1200G LDD-1 MSC-4000 R2144 PONTUS II C45 MC257
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admin
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Post subject: Re: Lexicon LDD-1 AC-3 Unit - just curious Posted: 27 May 2021, 13:06 |
Site Admin |
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Joined: 07 Aug 2002, 23:37 Posts: 4549 Location: Tokyo Has thanked: 294 times Been thanked: 1144 times
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I tried to get the LDD-1 trigger to work with a standard 0/+12V trigger but... so far no luck. Of course at 12V, the unit is up. But at 0V it won't power off. You need to short signal to GND to make it power off, not a standard trigger You would expect: 0V => OFF 12V => ON But it's: Shorted => OFF Any voltage => ON Julien
_________________ HARDWARE DATABASE HLD-X0/9 LD-S9 OPPO 105/205 SL-1200G LDD-1 MSC-4000 R2144 PONTUS II C45 MC257
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admin
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Post subject: Re: Lexicon LDD-1 AC-3 Unit - just curious Posted: 31 May 2021, 05:19 |
Site Admin |
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Joined: 07 Aug 2002, 23:37 Posts: 4549 Location: Tokyo Has thanked: 294 times Been thanked: 1144 times
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I actually contacted Lexicon to ask for more wiring details and it seems that the problem is coming from the GND. The cable I got from eBay splits the DIN5 into 2 mono mini-jacks as follows: Pin 2 for GND + Pin 3 for Tip Pin 2 for GND + Pin 5 for Tip From Lexicon diagram, they expect GND on Pin 1 and Power 12V trigger on Pin 3. https://manuals.lddb.com/AC3RF_Demodulators/Lexicon_LDD-1-EN-DC_Trigger_Cable_Mini_to_DIN_cable.pdfI will connect Pin 1 with Pin 2 (and Pin 4 along the way since it's not connected to anything) and get them all to GND. I just don't have a piece of electrical wire to use/test this right now. Julien
_________________ HARDWARE DATABASE HLD-X0/9 LD-S9 OPPO 105/205 SL-1200G LDD-1 MSC-4000 R2144 PONTUS II C45 MC257
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