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tech / sci.electronics.repair / RGB Mod in Panasonic CTP-2780SF

RGB Mod in Panasonic CTP-2780SF

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https://www.novabbs.com/tech/article-flat.php?id=10532&group=sci.electronics.repair#10532

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From: tec...@parts-link.com (UFO)
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Subject: RGB Mod in Panasonic CTP-2780SF
Date: Mon, 25 Mar 2024 08:42:09 -0400
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by: UFO - Mon, 25 Mar 2024 12:42 UTC

Anyone ever do one of these to a CRT?

Seems like the set has this jungle IC which will be where the RGB lines
for the OSD are needed for the mod:

https://pdf1.alldatasheet.com/datasheet-pdf/view/13342/PANASONIC/AN5304N...

Am not sure what the line would be that tells the chip to turn the OSD on.
Apparently there
is a line if its 1 volt or more, it activates the OSD, if zero its normal
video.

I watched this video to learn more:
https://www.youtube.com/watch?v=d64hDBI7CpY

I guess the blanking pin has to get about 1 Volt on it somehow, he uses a
switch with a voltage divider and thats what tells the IC to switch mode so
the RGB
input to the chip for the OSD gets activated. But thats for Sony, not sure
about Panasonics design.

He says there must be a sync line tapped into which is bought out to the
rear of the set,
with the (3) RGB lines / jacks but not sure where that would be tapped into?

I am gonna use BNC jacks, not the scart connector. I do have the SM for the
set, its a SAMS photofact.
Any ideas out there?