Since no one else has jumped in, I'll give you my 2 cents worth. I haven't studied that situation, but it sounds likely to me. I believe (really taxing the memory here) that CC is in the vertical interval and whenever the composite signal is disassembled and reassembled, as some cable companies have done in the past, it's easy to lose some of those things. Any time you use a set top box, you have the chance that this was done to the signal at some point, because somebody has had the opportunity to mess with that signal after it left the transmitter and before it got to you. Not all of them are broadcast engineers. Around here we had a problem 25 years ago of severe brightness differences between channels on Zenith TVs of the vertical chassis design, but only on cable. Seems that Zenith was using the base line in the video signal as an automatic brightness reference. Our cable company was disassembling and reassembling each channel before putting it on their system and not paying much attention to that part of the signal. It only bothered Zeniths, so apparently they were the only company using that as a brightness reference. The cable company denied it of course, but Zenith's engineers explained it to me in great detail. Since they were the ones who originally designed the cable system we use, way back in the late 40s and early 50s. Since the guy I talked to was there at the time, I kind of believed him over the cable company. What ever happened to VITS? I saw a few GE TVs that used it, way back when. Never saw any others. Russ Hoyt Hoyt's TV Exeter, NH ----- Original Message ----- From: "Kevin" <kevintv@xxxxxxx> To: "TECH-ASSIST" <techassist@xxxxxxxxxxxxx> Sent: Thursday, December 30, 2004 4:14 PM Subject: [TechAssist] RCA PTK178, Close captioning question. > Sorry I do not have the model #, but this is just a general question > about CC, so I hope that will be OK. Does CC work through all inputs > (cable, composite, S-Video, and component)? Or does CC only work > through channel 3? I repaired an RCA PTK178 and hooked up their > satellite through the S-Video input, and disconnected the cable from the > satellite receiver. Now they say the CC is turned on but does not work > at all. I suggested they watch the satellite through channel 3 as they > did before the repair and see if that corrects the problem. By the way > the original problem was coolant on the P/S board that was causing a > jitter in the picture. I repaired it by cleaning the board, replacing a > cap, and resealing all 3 tubes. > > Kevin Wilks > Kevin's TV & Video Repair > Penticton BC Canada > kevintv@xxxxxxx > > > > > -------------------------------------------------------------------------- --- > Lost Password: > http://www.tech-assist.org and select "Login Problems?". > Email Archives: > http://www.freelists.org/archives/techassist/ > ----------------------------------------------------------------------------- Lost Password: http://www.tech-assist.org and select "Login Problems?". Email Archives: http://www.freelists.org/archives/techassist/