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Tbosworth88
Joined: 21 Aug 2022 Posts: 2
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Link Posted: Sun Aug 21, 2022 1:47 pm Post subject: Help! Sony KP-7220 |
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Just bought a Sony videoScope. Was lucky and found it with the screen. Never had a projector before so I’m totally lost here. Hooked up a couple different devices to it and all I get is static. The only time I did get a little bit of a picture it “looped” from top to bottom. Like it displayed it from the top down over and over. I found a service manual but it’s not that helpful. Anyone have any experience with these? I’d love to get this thing working again!
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kal Forum Administrator
Joined: 06 Mar 2006 Posts: 17860 Location: Ottawa, Canada
TV/Projector: JVC DLA-NZ7
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Boet
Joined: 10 Jan 2012 Posts: 30 Location: Netherlands
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Link Posted: Tue Aug 23, 2022 7:13 pm Post subject: |
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Used to have one, it had to go recently unfortunately.
You hooked up a couple of devices, to which input? Mine had 2. Cable TV and composite input (through a BNC connector). On the front there's a switch with which you can select the input.
The manual has a detailed instruction on how to scan for channels, if you're using the Cable TV input.
Underneath the hood (detach it by loosening 2 screws on each side, on metal flaps near floor level), you find a circuit board full of potentiometers for setting up the video.
I have the service manuals for 2 versions, 7220 and 7222. They are very identical (in fact, I don't even remember if I found a difference), but both supplement eachother when it comes to oscilloscope measurements shown. I can look them up if you need them.
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Tbosworth88
Joined: 21 Aug 2022 Posts: 2
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Link Posted: Tue Aug 30, 2022 11:27 pm Post subject: |
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Only tried the vhf input. Not the uhf. There’s no switch for changing input on the front. I opened it but have no idea what I’m looking at. There’s no swollen caps or anything that your lead me to believe something could have gone bad. (Not saying something hasn’t either.) I’ve tried a vcr and my N64 with an RF modulator. And what’s a bnc connecter?
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Curt Palme CRT Tech
Joined: 08 Mar 2006 Posts: 24305 Location: Langley, BC
TV/Projector: All of them!
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Link Posted: Wed Aug 31, 2022 4:28 am Post subject: |
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It's likely the TV tuner isn't tuned to the output of the RF modulator. Find and read the Sony projector manual, and there's usually a plastic cover where you can tune in each individual channel via a multi turn thumbscrew.
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Boet
Joined: 10 Jan 2012 Posts: 30 Location: Netherlands
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