Sync Problem ?

[JustRelax]

Hi everyone, i´m new here and found this place due interesting mods here in the forum :-)

I just completet my home theatre with soundsystem and projector nd so on. Modded my snes to spdif for clear sound :-) and now its on the video side.
I realy don´t want to connect it with composite.
while strafing trough the manual of my Projector (Mitsubishi HC5500) i found out that its accepting RGB+1V.
I builded a adapter from Scart to VGA and tried. result "No Signal" :-(.
I put the snes RGB cable in my Gamecube and there i get a picture, not realy a good one, but its there.
Then i read here at gamesx that PAL snes don´t output CSync, I thoungt maybe thats the problem.
Next i tried Sega Genesis 1 i thought cause it has a csync output it suerly works. i was wrong :-( "No signal" for the Genesis, too.

someone have a idea why the 2 cosnols not working ? i orderd a LM1881 and will try for the SNES but what about the genesis ?
and why is the Gamecube working?

I don´t get it :-(

greets

[albino_vulpix]

Are all the systems PAL? When you say 'RGB+1V' is there any mention of 15kHz?

[Heffa]

I'm guessing the problem is that your projector wants a RGB signal with higher Vpp (hence the +1v as in 1 Volt) and your consoles are only producing Vcc of 0.3Vpp.

Try adding an amplifier to the RGB signal.

[JustRelax]

Yes PAL consoles.

hmm

does the amps on the gamesx site (for pce if i remember right) will work ?
should i build amps for R G B and Snyc ?

thanx :-) :-)

[Heffa]

Yes, the amp from some old PCE magazine should work.
I would try with RGB first, not sure that sync really needs to be amplified...

[JustRelax]

hi everyone after long time, i started a new try for the sync problem.

i tried the amp from that old pce magazin and a LM1881, result of both when i connect it to the projector the circuit  blows up :-(
all voltage levels are prefect untill i connect, after that i have no output voltage at the LM Syncoutput pin.

how i said the Gamecube works, no need of the LM or the amp circuit.

what i´m doing wrong? :-(