Post #1871668

Successfully did my first CRT video input mod! I added S-Video (i.e. Y/C) to a Sony Trinitron KV-20FS12 (manufactured Nov 2000), which comes default with only CVBS (i.e. yellow-plug Composite) inputs. Though I could've directly tapped the jungle chip (CXA2131CS), I went about the method of populating add'l parts, removing jumpers, and changing the service menu IDs to match a KV-20FV12, to enable S-Video input. I used primarily two resources: https://crtdatabase.com/crts/sony/sony-kv-20fs12 -- CRTDatabase entry on the Sony KV-20FS12, from which a service manual is available for this & similar sets with a BA-5 chassis https://shmups.system11.org/viewtopic.php?p=1447502#p1447502 -- Shmups post by BazookaBen, on modifying a KV-13FM12 for S-Video, using same methods Current issue was, at this point, DigiKey and Mouser appear to no longer carry NJM2534M switching ICs, and they're only available in batches of 2,000 at around US$800 a batch. Instead, an ebay seller offered these chips, in two-digit amounts, for about US$1 each × number of chips, + shipping. They thankfully arrived much quicker than anticipated, and one indeed did the trick. I still need to make the S-Video input jack more physically secure. I also hope to add a YPbPr input mod, as well as an RGB input mod via Mux. I don't plan on further keeping this set -- but even so, now that I'm much more confident in my soldering skills, I at least wanted to mod it first before listing it, so that it's more useful to the next person. I want to be able to service other CRTs, too!