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elahrairrah
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Post subject: LD player mods? Posted: 16 Nov 2011, 16:05 |
Young Padawan |
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Joined: 30 Aug 2005, 15:38 Posts: 3416 Location: Pennsylvania Has thanked: 77 times Been thanked: 142 times
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found this youtube video of a tech-savvy individual making some electronic mods on different boards in a CLD-99: My Pioneer CLD-99 laserdisc mods (youtube) Would changes like this really make that much of a difference in performance?
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benmbe
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Post subject: Re: LD player mods? Posted: 16 Nov 2011, 19:29 |
Absolute fan |
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Joined: 02 May 2006, 13:59 Posts: 1652 Location: United Kingdom Has thanked: 86 times Been thanked: 69 times
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Thank you for finding this and sharing. I wonder if this will be an official upgrade being provided for those who have this player CLD-99, and how much this will cost to upgrade. If you find out any other information on this then I would be very grateful. Sincere Regards
_________________ Το ταξίδι για την αλήθεια κάθε σκάφος δεμένα, κατόπιν δεν είναι να ληφθούν, ή μάλλον βάδισαν
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elahrairrah
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Post subject: Re: LD player mods? Posted: 16 Nov 2011, 21:42 |
Young Padawan |
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Joined: 30 Aug 2005, 15:38 Posts: 3416 Location: Pennsylvania Has thanked: 77 times Been thanked: 142 times
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benmbe wrote: Thank you for finding this and sharing. I wonder if this will be an official upgrade being provided for those who have this player CLD-99, and how much this will cost to upgrade. If you find out any other information on this then I would be very grateful. Sincere Regards I don't think this is any kind of official upgrade. Just someone with some knowledge of electronics and PCBs trying to make his player better. Kind of like trying to overclock your computer's CPU. Publius I figured you'd be best suited for comment on this, but since he's only saying that his player's performance is improved we can't really be sure of it as he hasn't given us any example of it's improved performance. So like you say, right now, it's just "voodoo electronics"
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naiaru
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Post subject: Re: LD player mods? Posted: 18 Nov 2011, 01:31 |
Advanced fan |
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Joined: 20 Jul 2011, 04:51 Posts: 681 Location: United States Has thanked: 0 time Been thanked: 0 time
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krbahr wrote: You can swap power supplies between certain players such as the 503/703/704 and then the 79/99 if you don't mind soldering the power connections. In the same way many of the 504, 604, 505, 406, 606 are the same design but some are built for different wattage requirements. It's more of the connections and how they fit. Real quality power supplies just take up a lot more room and companies prefer the cheaper switching supplies as they save a lot of room and take less power. But Switching supplies are also more noisy.
Even when you get a better supply you are still limited to the quality of the electronic board layout. If it is a good electronic board then you'll see the advantages of the better power supply, if the electronic board is cheaper then it generates enough noise it will corrupt the power supply.
You can usually always improve but there is just a limit of what can be done with a design. I found this out in the 80's modifying Philips TDA series 16-bit DAC's. Now how much noise will these sorts of mods really cut out from the picture/audio?
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benmbe
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Post subject: Re: LD player mods? Posted: 18 Nov 2011, 09:34 |
Absolute fan |
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Joined: 02 May 2006, 13:59 Posts: 1652 Location: United Kingdom Has thanked: 86 times Been thanked: 69 times
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I have a genuine Video modification for my DVL-909, and as soon as I have available funds for this and a full service to the player I will get this done. I have mentioed this to the engineer and he said that he would genuinely consider carrying out this MOD to the Player. I shall keep this site informed of the results as and when they arrive. Regards to all
_________________ Το ταξίδι για την αλήθεια κάθε σκάφος δεμένα, κατόπιν δεν είναι να ληφθούν, ή μάλλον βάδισαν
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krbahr
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Post subject: Re: LD player mods? Posted: 18 Nov 2011, 22:43 |
Hardcore fan |
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Joined: 10 May 2007, 03:12 Posts: 1520 Location: United States Has thanked: 0 time Been thanked: 337 times
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naiaru wrote: Now how much noise will these sorts of mods really cut out from the picture/audio? Generally you are trying to do two things, use better capacitors to quiet down the background noise on the boards which will make the picture smoother and better capacitors and resistors in the signal path as cheaper parts can act like low-pass filters. Yes this does help but how much better depends on how much it is possible to reduce noise do to the PWB layout. You cannot give definite answers for these experiments. From my experience you cannot make a cheap board layout look as good as a board lay'd out with extreme care. Cheap boards do not have as good signal path isolation so you have to go crazy with capacitors to attempt to control this. Even the good layouts use proper capacitors but the design allows them to work.
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krbahr
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Post subject: Re: LD player mods? Posted: 21 Nov 2011, 23:37 |
Hardcore fan |
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Joined: 10 May 2007, 03:12 Posts: 1520 Location: United States Has thanked: 0 time Been thanked: 337 times
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publius wrote: The mod I would like to see is one mentioned on AVS Forum quite a while back, which I was never able to get details on. Namely, tapping the digital timebase corrector & leading out a composite serial digital (D2 type) signal. There are various pieces of equipment which were built to handle this format of digital signal, although it's obsolete these days. I was watching that one too, was disappointed it ended.
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krbahr
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Post subject: Re: LD player mods? Posted: 03 Dec 2011, 04:25 |
Hardcore fan |
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Joined: 10 May 2007, 03:12 Posts: 1520 Location: United States Has thanked: 0 time Been thanked: 337 times
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publius wrote: OK, now that I've seen that, I'm more ready to admit that he's got something there. That kind of measurement does mean something to me. In other news, we have some new information on the composite digital modification. Apparently it was actually for a parallel digital output, which I didn't get at first. The output from the comb filter/DNR/TBC IC is parallel in the LD players, 8-bit as mentioned. Wish I knew if that looked any better than the analog outputs.
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