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dementian27
Joined: 21 Sep 2024
Posts: 7
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| Posted: Sat Mar 29, 2025 3:13 am Post subject: VPH-D50 Mark II s-video input stopped working |
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I was watching a VHS and suddenly the video turned black. Then the menu text showed up on the screen saying there was no video signal for the s-video input.
I tried different VCRs & DVD players. Also swapped out s-video cables. Nothing.
Is this a known issue? Any troubleshooting that I am missing?
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kal
Forum Administrator
Joined: 06 Mar 2006
Posts: 18114
Location: Ottawa, Canada
TV/Projector: JVC DLA-NZ7
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dementian27
Joined: 21 Sep 2024
Posts: 7
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| Posted: Sat Mar 29, 2025 4:52 pm Post subject: |
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| kal wrote: | The internal menus work?
RGBHV and composite inputs work?
It's only S-video that doesn't work for some reason?
Kal |
Correct. RGBHV and composite still work fine. As do the internal menus. When I am on the s-video input it shows the menu and says "NO SIGNAL".
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kal
Forum Administrator
Joined: 06 Mar 2006
Posts: 18114
Location: Ottawa, Canada
TV/Projector: JVC DLA-NZ7
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| Posted: Sat Mar 29, 2025 5:42 pm Post subject: |
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Strange. I have no experience with the model but figured those extra details may help someone who is familiar. That said, few people would use composite or s-video inputs on CRT projectors because of the low quality/resolution, so you may find it difficult to find help. If you're tech savvy download the service manual off of our main site and dig in... Good luck!
Kal
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Tim in Phoenix
Joined: 21 Oct 2006
Posts: 4409
Location: Phoenix
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| Posted: Mon Mar 31, 2025 3:15 pm Post subject: |
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Guys
Sony likely has a "decoder board" to process S to RGB and sync and likely some chip on that has failed.......
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AnalogRocks
Forum Moderator
Joined: 08 Mar 2006
Posts: 26706
Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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| Posted: Thu Apr 03, 2025 4:37 pm Post subject: |
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That would be my guess.
Sounds like a sudden failure.
Anyone have D50 parts?
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dementian27
Joined: 21 Sep 2024
Posts: 7
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| Posted: Sat Apr 19, 2025 2:04 am Post subject: |
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Circling back to this. It definitely seems to be some kind of hardware failure. Anyone know which board would need to be replaced?
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Mon Apr 21, 2025 2:24 pm Post subject: |
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You'd need the entire RGBHV/processor input board. Will be tough to find at this point.
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Mon Apr 21, 2025 11:29 pm Post subject: |
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| dementian27 wrote: | | Circling back to this. It definitely seems to be some kind of hardware failure. Anyone know which board would need to be replaced? |
Get an external device like an OSSC that will take in s-video and output RGB.
Should be easy to find, and will solve your issue straight away.
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dementian27
Joined: 21 Sep 2024
Posts: 7
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Thu Apr 24, 2025 2:40 pm Post subject: |
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That depends on where you're located. It has component and SCART output, indicating it's for the European/PAL market. No D50 that I've ever seen has a SCART input. Not sure what the video levels are coming out of a SCART connector.
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Mon Apr 28, 2025 12:05 am Post subject: |
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| Curt Palme wrote: | | That depends on where you're located. It has component and SCART output, indicating it's for the European/PAL market. No D50 that I've ever seen has a SCART input. Not sure what the video levels are coming out of a SCART connector. |
Standard video signals come from a SCART connector, it is just a connector type, not a signal standard. It is exactly the same as RGB with composite sync, and uses the composite video line for that composite sync. You can send any signal you want down that composite video line, and it will work just fine.
The PAL / NTSC part of it is irrelevant, the open source scan converter will take both, and will take both at either 50Hz or 60Hz.
Very easy to get a SCART to 5x BNC or 4x BNC breakout cable, which is essentially the exact same thing, just with a different plug on the end.
Don't fear the SCART cable Curt, just something the French decided would make things tidy and simple to connect in their land of SECAM causing them to have to use RGB on most things to remove the incompatible PAL or NTSC encoding, apart from that, it's nothing more than copper wire mate 
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RUNCO DTV991 LC ( NEC XG 852 LC ) 100" 4:3 screen, H/K AVR 7.1...
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