PAL GC RGB ON A PAL PSONE SCREEN NOT WORKING HELP!

[zenloc]

i have a pal gamecube and a pal psone screen on the screen you have rgb inputs and the gamecube uoutputs rgb but when i connect it it does nothing black screen??


can anybody help me??

[Hojo_Norem]

Hmm, could you describe HOW its connected?  Usually the PAL PSOne screen needs the R,G,B,C and 5v signals to work in RGB.  Also the PAL PSOne screen won't work at 60Hz.

[zenloc]

well the gamcube has these outputs:

green pin
red pin
blue pin
ground pin
composite video pin (so no c sync)
5v pin

and i connect thoses pin's to these pin inputs on the psone screen

green in
blue in
red in
C sync in
5v in
ground in

and i get nothing some people say i need tp get the c sync from the gamecube's composite video with a lm1881n chip well i tried that and it didn't wotk maby you could explain how to extract the c sync from composite video more detailed
?

[Hojo_Norem]

Ah, I see the problem now.  The PSOne screens use the Y input pin for C sync.  You should be able to get away with connecting the GC's composite out to the PSOne screen's Y input.

[zenloc]

my psone scren haen't got a y input unles i take it directly of the chip??

if so which pin is it?

[Hojo_Norem]

Is your screen a official Sony one?  If so then the info here should help.  When I opened my screen up and did some continuity testing on the connector I found that composite wasn't connected to anything but the Y input was.

If you have your screen open take a look at the area where the larger connector to the smaller board is.  You should see a pad marked 'Y_O'.  Try connecting the GC composite to that.  Also if you look a little into the board you will se some pads labeled R_IN, B_IN, G_IN and Y_IN.  Try connecting the composite to the Y_IN pad.  Take note that not all the labels are next to the pads, but are still in the same orientation.

EDIT:  I should say that I have never actually tried running my PSOne screen on RGB using composite for sync, but seeing that the screen seems to use Y for sync than composite should work cause all composite is Y (composite sync+brighness) mixed with C (colour signal) on the same wire.