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How to use SCART for our hobby
Jollywest:
I've built a new cable just to hopefully eradicate any cable errors.
I chopped the female end off an old style vga cable (with pin 9) and soldered it to a scart connector. I've checked each pin for continuity as well.
However it still isn't working and the only difference is that I get a garbled boot picture when the pc first boots.
I'm probably getting a bit confused here but what use is pin 9 on the vga cable in this vga-scart setup? As
don't see it connected anywhere in the diagrams
apfelanni:
the sub-d 5 volt pin 9 can be used to set the tv to rgb and av mode. its usally missing on newer cables . if u cut a 15/15 male female cable it doesnt necessarily mean the pin is wired . u should meter the voltage ! 5 volt to pin 8 enables auto av , but sometimes in 16:9 mode. some tvs ignore the voltage and switch to 4:3 .
check this here . i upped the translated schematics from mamescart italy . make sure u dont mix up solderside and pin side of the vga and scart plug. best thing is to print it out or draw it on paper after u pinged the wires with a multimeter ( unless ure vga plug is a non hotglued screw version and u can verify the cable colors visual ).
https://rapidshare.com/files/435253427/Google_Translate.mht
Jollywest:
Thanks for the file, everything you ever wanted to know about VGA-scart RGB by the looks of it. :)
5.2 Schematic no.2 is how I connected my 2nd cable (cut female end off vga and soldered scart connector), the scart connector had pin numbers on both sides and is correctly soldered but even though each pin has continuity I now realise that vga pins 5, 6, 7, 8, 10, 11, 12 and 15 are connected somewhere in the cable or inside the male side of glued vga connector, is this something to do with the foil surrounding each ground cable perhaps?
5.5 Diagram 6 is how I connected my 1st cable together (male vga connector, male scart connector, 2 x 1k Ohm res, 1x 100 Ohm res, cable), Again both the vga and scart connectors had pin numbers on both sides and is also soldered correctly, has continuity and I've put sync cables back onto pin 20 from 19. Still no picture on tv though.
The voltage on the red 5v cable with 100 Ohm resistor reads at 2.8v and the yellow 12v cable reads at 12.2v. Bit stumped as to why this cable wouldn't work.
To rule out the video card being the problem I've got a cheap one coming from ebay that is in the supported section on the soft-15khz website, I'll grab another scart tv as well.
karnov64:
if it has not been said already in this thread (havnt read through it all yet lol), if u want the auto switch to AV on your TV via pin 8 of the scart connector, but can only send 5v to this pin (perhaps if that is all your vga pin 9 can provide), and thus end up in 16:9 widescreen mode, but want 4:3 instead, go into your tv service menu and perhaps like my tv (14" beko) you will have the option to change the size (horiz/vert resize) of the widescreen mode, in which case u can simply 'resize' your 16:9 screen to 4:3, and save your changes.
Paradroid:
--- Quote from: apfelanni on December 05, 2011, 04:06:59 pm ---i upped the translated schematics from mamescart italy
--- End quote ---
Thanks for that apfelanni! You're a real asset around here! I'd never seen that page before and, although I read much of the information elsewhere, there's some cool stuff there. Gonna take me a while to get through it all but I'm looking forward to it! Some good holiday reading material... ;)