tjsynkral wrote:mvsfan wrote:i actually noticed that from one of the other JVC manuals i was reading.
looks like some or all of the JVC pip units are RGB.
But the pip is in a small window. how would you make it fullscreen? is it adjustable in the service menu?
Edit: i got the original manual with the tv. The AV36S33 doesnt have pip.
Even if the PIP board is not installed, the pads and the pins on IC601 may be present and live. Try hooking up pins 6, 7, 8 to R, G, B and pulling pins 9, 10, and 11 high and see if you get your RGB input. (Tune the TV to composite from the same source for sync.)
Note: It's not clear whether this set is rigged to feed in an RGB PIP or a YUV PIP. The PIP board pins are labeled Y PR and PB, but that doesn't necessarily mean they are actually carrying Y/PR/PB. It appears that the Matrix Control is pulled high which would be consistent with an RGB-YUV conversion mode so it probably really is RGB on the PIP input.
Sure it's clear. I sound like a broken record in this thread. Look up the datasheet for the components in question. They tell you everything that you need to know, operationally.
That's a TA1287F. The Datasheet can be found here:
http://pdf1.alldatasheet.com/datasheet- ... 1287F.html
Let's pull some information, we'll start with the inputs on the chip:
Okay, great. Both analog RGB @ .7vPP AND YUV work here.
Now, let's look into blanking and signal switching:
This tells some of the story. But the question is: "How would I get my small little PiP box to fill the entire screen?"
I believe there's your answer. Reference the table, and it will tell you the proper combination of those 3 blanking pins needed to blank the entire screen.
Your television may already give you the ability to full-screen your PiP window. If it does, there's no reason to mess with the blanking circuit here. If it doesn't, however. You can manually take control of it.
^ If you look at the 1st picture I annotated, you'll see that pin 16 is being fed by the VCC input on this IC with a divider in circuit to drop the voltage down to around 2.9V. This switches the chip into RGB to YUV (NTSC) operation. You can leave that alone, but I'd be interested in seeing how tying pin 16 to low operates. It should operate as a 1:1 RGB input to RGB output as the chip can operate completely as a passthrough. Although, that may have an ill-effect on your standard inputs. This chip may terminate to something that ONLY operates in the YUV color-space, which is probable. Just something to play with.
Either way, it's pretty easy.
Of course, this is all academic if your set doesn't have the TA1287F populated on the board there.