Do you make house calls?
Only for you big boy.
How crazy difficult of a mod is this?
If you have a sound service manual for your set and a Jungle I/C with analog RGB inputs, it isn't very difficult to do.
Would be kind of neat to see some sort of attempt at a guide for this.
Also was a SCART port wired into the casing of the TV, or how is it being connected?
I'll have a write-up available in a neighboring forum once everything arrives.
This Trinitron doesn't have an "unused" scart port, or an area designated for SCART RGB input.
I'm adding a panel mount female SCART connector to the back of this set (just waiting for it to get across the pond).
This isn't going my write-up. But since so many people are asking me about this, I'll provide a brief explanation of what's happening:
There are 4 signals that I need to be terminated for RGB input into this television. RGB, and the blanking. The OSD ouputs RGB to the RGB inputs of the Jungle IC, as well as a blanking signal that tells the Jungle I/C to output RGB.
Let's look at some of the important parts of the datasheet for this particular Jungle I/C:
YS is the RGB enable signal. When this is tied high (5v) RGB output is enabled. That's simple enough to understand.
RGB is obviously our analog RGB inputs. This Jungle I/C is geared to accepting standard termination RGB video signals @ .7VPP, clamp and all. All we need to do is add a .1uF cap and we're in great shape.
Sync is accepted through the composite port. So we need not worry about doing anything with that as it's genlocked to the RGB. Simply tap it and go.
So as you can see, it's pretty straight forward as to how we can inject our own RGB sources into a TV properly. But in doing so, we're affecting the OSD. How does the OSD work?
You press the "Menu" button on your television, the blanking pin from the OSD chip sends voltage to the YS input on the Jungle I/C, enabling RGB output, thereby enabling the OSD.
The OSD sends color information through its RGB outputs into the RGB inputs of the Jungle I/C. That's about it.
Right, so what we need to do is switch the RGB and blanking between our source and the OSD. How do we do it?
A simple 4PDT ON/ON switch will do the job.
Once the rest of my components come in, I'll go into more detail. This has certainly been done before, but documentation has always been sparse.
