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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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adding jacks to tv/vcr combo
Hi all,
I have a Symphonic 9 inch tv/vcr combo that we use in the van. I would like to add the ability to connect a dvd player without going through the vcr video circuit. My idea is to cut the video feed line from the vcr to the monitor and wire in two composite jacks mounted on the back of the unit. One jack would to the monitor. The other jack would come from the vcr. To watch a dvd, I would connect a composite cable from the dvd player to the jack going to the monitor. To watch a vhs tape, I would just connect a composite cable to the two jacks. The sound I can get from the dvd or from the tv/vcr via headphones. I haven't opened the case yet. Does this solution sound feasible? Do these units typically come with a composite cable connection between the vcr and the monitor inside the case or is it all on a circuit board? I am also making the assumption that if there is a composite cable connection that it only serves the purpose of carrying a video signal from the vcr to the monitor. Is this a reasonable assumption? Thanks, Marty |
#2
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Thanks for the reply. Yes, it is a "recent" tv/vcr combo, bought in
1998, I think. I had a feeling it might be more complicated than I was thinking. I did already try the front jacks and the rf jack in the back and the macrovision made it unwatchable. I also tried an rf converter from radioshack with better but still pretty bad results. We still have movies in both dvd and vhs format and a compact dvd player so I was hoping to be able to use both. Are there boxes available than can clean the macrovision signal for a reasonable price? Thanks, Marty LASERandDVDfan wrote: I have a Symphonic 9 inch tv/vcr combo that we use in the van. I would like to add the ability to connect a dvd player without going through the vcr video circuit. I don't think what you propose is feasible on your TV/VCR, especially if it's a newer unit. It would most likely involve extensive circuit modification, if what you propose can be done at all without causing the thing not to operate properly. This assumes a TV/VCR combo that was made recently from the late 1990s to present. The feed line is likely integrated on the main PC board as opposed to being a wire. You'd likely need a schematic to even know where to go to on the board. The main PC board contains all elements for the operation of the TV and VCR, save for the high voltage parts designed to drive the picture tube and deflection yoke which may be located on the upper side of the enclosure. Also, a lot of the parts are integrated in such a way that a modification could cause unpredictable and undesirable behavior. Have you tried to use a DVD player on the TV/VCR combo through the front inputs to see what would happen? It won't cause any damage to either component when you test, that much I know for sure. If the video comes out fine, then you can just use the player with the TV/VCR with no problems. If it does react to MacroVision, it would be better, not to mention safer, to simply replace the TV/VCR combo with a TV/DVD combo. - Reinhart |
#3
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you could get a macrovision remover. they sell them on the internet just
google it. I think i saw some for something like $30 on one site. They also sell them at best buy for about +/- $65. - Mike "Marty" wrote in message oups.com... Thanks for the reply. Yes, it is a "recent" tv/vcr combo, bought in 1998, I think. I had a feeling it might be more complicated than I was thinking. I did already try the front jacks and the rf jack in the back and the macrovision made it unwatchable. I also tried an rf converter from radioshack with better but still pretty bad results. We still have movies in both dvd and vhs format and a compact dvd player so I was hoping to be able to use both. Are there boxes available than can clean the macrovision signal for a reasonable price? Thanks, Marty LASERandDVDfan wrote: I have a Symphonic 9 inch tv/vcr combo that we use in the van. I would like to add the ability to connect a dvd player without going through the vcr video circuit. I don't think what you propose is feasible on your TV/VCR, especially if it's a newer unit. It would most likely involve extensive circuit modification, if what you propose can be done at all without causing the thing not to operate properly. This assumes a TV/VCR combo that was made recently from the late 1990s to present. The feed line is likely integrated on the main PC board as opposed to being a wire. You'd likely need a schematic to even know where to go to on the board. The main PC board contains all elements for the operation of the TV and VCR, save for the high voltage parts designed to drive the picture tube and deflection yoke which may be located on the upper side of the enclosure. Also, a lot of the parts are integrated in such a way that a modification could cause unpredictable and undesirable behavior. Have you tried to use a DVD player on the TV/VCR combo through the front inputs to see what would happen? It won't cause any damage to either component when you test, that much I know for sure. If the video comes out fine, then you can just use the player with the TV/VCR with no problems. If it does react to MacroVision, it would be better, not to mention safer, to simply replace the TV/VCR combo with a TV/DVD combo. - Reinhart |
#4
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Are there boxes available than can clean
the macrovision signal for a reasonable price? Yes, and another poster here has just mentioned where. Mike Kennedy, the other poster, suggests doing a google search for a "macrovision remover." You may find a vendor website that sells such a device. - Reinhart |
#5
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"Mike Kennedy" wrote in message nk.net... | you could get a macrovision remover. they sell them on the internet just | google it. I think i saw some for something like $30 on one site. They also | sell them at best buy for about +/- $65. | | - Mike CAN$40 at London Drugs in Canada. Or build your own (search for Antti Paarlahti ). N |
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