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signofzeta
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Post subject: Re: Denon LA-2500 issue: CAV good, CLV crap! Posted: 14 Apr 2020, 20:28 |
Jedi Knight |
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Joined: 14 Jan 2010, 09:44 Posts: 5983 Location: Ann Arbor Has thanked: 1285 times Been thanked: 1102 times
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If I had a 503 doing this I would assume it was alignment. On a CRT you’ll see a classic “herringbone” pattern as crosstalk from the leading and previous tracks in the spiral are affecting the main signal. This is virtually invisible on CAV discs because the errant frames are always in phase. On digital TVs...due to all the signal processing and the inherent aliasing that takes place when digitizing NTSC, sometimes it looks more “terrible” than herringbone making it hard to be sure that you’re seeing crosstalk. (It helps to have a CRT around if you’re into LD. Even if it’s not your main set, just for diagnosis.)
You need a scope, a test disc, and a service manual, as far as I know, for alignment.
_________________ All about LD care, inner sleeves, shrink wrap, etc.
https://youtu.be/b3O-vHpHRpM
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spudeus
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Post subject: Re: Denon LA-2500 issue: CAV good, CLV crap! Posted: 14 Apr 2020, 21:16 |
Honest fan |
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Joined: 30 Sep 2006, 20:33 Posts: 71 Location: United States Has thanked: 4 times Been thanked: 10 times
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I got impatient after 5 minutes or so, will run it longer to see if it improves but am not hopeful. . . will try to take a pic and post here. The 2500 is going straight into a 4K LED TV, I'm afraid I got rid of all my CRTs. I will say my other LD players provide a clean, more than passable picture on the 4K. I fear it is a deep tech issue beyond my meagre mechanical ability. . . which means I pretty much burned $100 I'm seriously considering hunting down a Panasonic - nothing fancy but they seem known for their durability.
_________________ CLD-1070 / CLD-D701 / CLD-V2800 / DVL-909
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cplusplus
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Post subject: Re: Denon LA-2500 issue: CAV good, CLV crap! Posted: 14 Apr 2020, 22:08 |
Hardcore fan |
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Joined: 13 Aug 2018, 03:18 Posts: 1518 Has thanked: 448 times Been thanked: 587 times
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spudeus wrote: I'm seriously considering hunting down a Panasonic - nothing fancy but they seem known for their durability. If by delivered you mean this LA-2500 was shipped to you, durability pretty much goes out the window. The LA-2500/CLD-D503 is durable. The only issue I have seen on them is the grip ring. Kurtis mentioned they can suffer from a cap issue that can cause the video to fail, but since CAV is fine this points to alignment (especially if it was shipped). While taking the photo, see if it is worse at the end of the disc.
Last edited by cplusplus on 14 Apr 2020, 23:09, edited 1 time in total.
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signofzeta
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Post subject: Re: Denon LA-2500 issue: CAV good, CLV crap! Posted: 14 Apr 2020, 22:47 |
Jedi Knight |
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Joined: 14 Jan 2010, 09:44 Posts: 5983 Location: Ann Arbor Has thanked: 1285 times Been thanked: 1102 times
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spudeus wrote: I got impatient after 5 minutes or so, will run it longer to see if it improves but am not hopeful. . . will try to take a pic and post here. The 2500 is going straight into a 4K LED TV, I'm afraid I got rid of all my CRTs. I will say my other LD players provide a clean, more than passable picture on the 4K. I fear it is a deep tech issue beyond my meagre mechanical ability. . . which means I pretty much burned $100 I'm seriously considering hunting down a Panasonic - nothing fancy but they seem known for their durability. While eBay looks like a LD player store with every model ever made in stock at the same time the reality is that most of those players haven’t been switched on in 20 years. When powered up they bind themselves so much they break themselves and when they get shipped something else breaks. eBay is like a store that breaks LD players instead of fixing them. “Reliability” isn’t really a thing when all the stuff is old and there are no spares. It would be more than fair for any LD player ever made to be broken by now. From my experience as long as you don’t leave them off for 20 years or ship them LD players are quite reliable. I’ve only ever had Pioneer LD players and one of them is a 503 that works fine. I was just using it the other day. If your 503 only needs an alignment then that’s pretty good, honestly. No parts needed, you can’t do much better short of “trouble free” and frankly if you want only trouble free running from a format that’s been dead for 20 years you may be asking too much.
_________________ All about LD care, inner sleeves, shrink wrap, etc.
https://youtu.be/b3O-vHpHRpM
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spudeus
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Post subject: Re: Denon LA-2500 issue: CAV good, CLV crap! Posted: 15 Apr 2020, 14:38 |
Honest fan |
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Joined: 30 Sep 2006, 20:33 Posts: 71 Location: United States Has thanked: 4 times Been thanked: 10 times
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Here's a shot of The Professional LD, about 20 minutes in. You can see weird horizontal banding, which is in every shot (with occasional vertical stripes). https://postimg.cc/bDbVfCnrZeta, with respect my experience doesn't track with yours. My first LD player was the basic CLD-1070 given to me by a friend - still works fine but is more of a back-up. My CLD-701 was purchased on ebay, shipped thousands of miles from California, but arrived in pristine shape, with remote, no problems whatsoever - my go-to player. Finally, I made an online purchase of my 504, but picked it up in person - we literally met in a parking lot. The seller made a point of saying he had used/maintained/replaced belts on it, but in practice it's been temperamental - doesn't always play the disc without a few ejects/inserts first! The Denon is the first one I've had with a major problem, probably just luck of the draw. I agree that for the most part these old players were built to last - I find them much more solid than today's consumer-grade stuff. I've been purchasing them so that I can rotate models in and out of my system, and thus will always have a back-up as opposed to all my eggs in one basket, so to speak. . .
_________________ CLD-1070 / CLD-D701 / CLD-V2800 / DVL-909
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spudeus
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Post subject: Re: Denon LA-2500 issue: CAV good, CLV crap! Posted: 16 Apr 2020, 13:34 |
Honest fan |
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Joined: 30 Sep 2006, 20:33 Posts: 71 Location: United States Has thanked: 4 times Been thanked: 10 times
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Thanks all for the feedback and tips. Crosstalk appears using A and B - plus I'm starting to notice sharp audio crackling on some discs as well! This is likely no more than a parts supply; not necessarily going to demand a refund but am not going to give the seller positive feedback.
_________________ CLD-1070 / CLD-D701 / CLD-V2800 / DVL-909
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