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[CLD-D704] CLV Smear https://forum.lddb.com/viewtopic.php?f=53&t=10045 |
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Author: | deckard [ 03 Oct 2021, 00:20 ] |
Post subject: | [CLD-D704] CLV Smear |
Has anyone attempted to figure out how to disable the filter that causes CLV smear on the CLD-704 (and similar players)? There’s an output line from the PD0226A (IC101), labelled XCLV. It appears to drive some analogue NR circuitry. High means CAV and Low means CLV. I wonder if forcing it high might disable the smear? Anyone tried it before? Note : I mistakenly posted this in the wrong location at first. Not sure if it's possible to move, so I deleted and reposted - hope that's not breaking any rules. |
Author: | cplusplus [ 03 Oct 2021, 01:41 ] |
Post subject: | Re: CLV Smear on CLD-D704 |
Interesting. At some point I meant to look into this. Made a subpar compilation of CLD-D703 info: Attachment: It seems low risk to try it out. The optimal solution to min/max video quality might be to just tap the video going into that IC, bypassing it as well as the DVP, memory, and comb filter. Video goes into IC400 at .9Vp-p (#21 in image) and comes out 1.7Vp-p. |
Author: | cplusplus [ 11 Oct 2021, 15:59 ] |
Post subject: | Re: [CLD-D704] CLV Smear |
Nice job! deckard wrote: The smearing is usually pretty subtle on my TV set, and the extra noise on CLV discs might make this mod pointless. Looking forward to finding out though! Eagerly awaiting your observations! |
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