Previously, on this topic https://forum.allaboutcircuits.com/...nalog-or-digital-and-whats-linear-rgb.201489/, I've discussed whether or not an IC had analog rgb inputs (video signal). So I've decided to rgb mod this CRT TV IC, but now I get a black screen when I (try to) activate the rgb.

This is the IC's datasheet:
https://pdf1.alldatasheet.com/datasheet-pdf/download/1315009/PHILIPS/TDA9381PS/N2.html

And this is the Tv service manual:
https://elektrotanya.com/panasonic_tc14a12_tc20a12_chassis_br3l_sch.pdf/download.html



Pins 46, 47 and 48 for the RGB, I've isolated them from the board. Pin 50 is where, I presume, is the Blanking Line, which is supposed to activate the RGB inputs. I've entered with 3.5v in the BLKIN and got a black screen. Using C-Sync in the composite video positive pin. I get nothing but a pitch black screen.
I wonder if there's anyhing else to do, or maybe I'm using the wrong pin for the balnking line? Because I've noticed that it connects to the RGB output too.

Look:



Could it be that I should use the F Blank (INSSW2) instead? Or the BLCIN (BCL)?

 

So I tried to use pin 45, which may be the blanking line, but also had no luck. Can anybody help me here?