Main > Monitor/Video Forum
How to use SCART for our hobby
Atomicburner:
Thank you Zebidee, but it continues the same, picture is rolling, and i dont have h.sync and v.sync in the TV.
I tried this especifations you gave me with the 5volt + resistor and 12 volt, and without them.
:badmood:
I bought this TV for my arcade and now i´ve gotta sell it... :hissy:
So now i´ve got this
VGA SCART
1 -> 15
2 -> 11
3 -> 7
5 -> 17
6 -> 17
7 -> 17
8 -> 17
10 -> 17
13 & 14 -> 20 goes to 16
vga ground -> 17
PC Power SCART
+12v -> 8
+5v -> 100Ohms -> 16
0v -> 18
I think this TV is the first one to cheat the cable.
Cheers
Rui
SailorSat:
I would NOT connect the syncs AND the power supply to scart pin 16.
power to 16 is ok, connect the syncs to 20 only
Atomicburner:
Thanx for the info Sailorsat, but it get worst. Now i only can see white dots and rolling picture...with or without the molex, sometimes gets blank and then goes black...i think in my case i must have 13 & 14 together to scart 20 and then from scart 20 to 16.
Any ideas..?
:cry: :banghead:
cheers
Zebidee:
Sailorsat is right - use 5v + 100ohms -> SCART 16 (best, should work for [almost] all TVs)
OR
bridge SCART 20 -> 16 (simpler, works with many TVs)
But not both as this is asking for trouble.
You mentioned that your cable works with a different TV, which suggests that the problem is with your Sony TV.
- Your Sony does not have a v-sync adjust control anywhere? Are you sure?
- What video mode are you in- 640x480? If so, try 640x240 or something similar ... some Sony CGA professional monitors don't support interlacing! But all their TVs should be OK.
- Your Sony might not accept RGB via SCART (i.e. only composite through pin 20) - but this is unlikely. I've only seen this once before, and that was with a very cheap & nasty brand of TV (Goldstar - this company has since morphed into Korea's LG)
- Try disconnecting the 12v power supply - you might be forcing the Sony into the wrong A/V mode by accident. You can always select A/V mode manually.
- Make sure that everything is connected & insulated properly - i.e. no shorts
- Make sure that you can feed a normal video signal into your Sony (e.g. TV, DVD), in case there is some deeper problem with it.
Atomicburner:
Hello Zebedee
Sry for the long post.
(You mentioned that your cable works with a different TV, which suggests that the problem is with your Sony TV.)
I think the same.
(- Your Sony does not have a v-sync adjust control anywhere? Are you sure?)
I´ve got this adjustments as you can see in picture above, then i´ve got 2 others in the middle of the board of TV witch i already touched and nothing
happened.
(- What video mode are you in- 640x480? If so, try 640x240 or something similar ... some Sony CGA professional monitors don't support interlacing! But all their TVs should be OK.)
I´m using Arcade VGA from Ultimarc, and in the other TV the image is OK with very bright colors, but in Sony i can see the bios but the picture is always rolling.
(- Your Sony might not accept RGB via SCART (i.e. only composite through pin 20) - but this is unlikely. I've only seen this once before, and that was with a very cheap & nasty brand of TV (Goldstar - this company has since morphed into Korea's LG))
Yes it does, you can see in picture above.
(- Try disconnecting the 12v power supply - you might be forcing the Sony into the wrong A/V mode by accident. You can always select A/V mode manually.)
Sony is going to the right A/V1, and if i disconnect the 12 power supply i can always select A/V mode manually as you said, and the picture
doesn´t modify.
(- Make sure that everything is connected & insulated properly - i.e. no shorts)
I always check if there is a short circuit with the multimeter in the pins of A/V.
(- Make sure that you can feed a normal video signal into your Sony (e.g. TV, DVD), in case there is some deeper problem with it.)
If i connect a DVD to the Sony, Bam awesome , it runs gorgeous.
By the way, i tried only to connect vga 13 & 14 to scart 16 (with no connection to scart 20) its rolling picture
but if i connect vga 13 & 14 to scart 20 (with no connection to scart 16) it gives me black picture with white dots.
I just dont know what to do.
Maybe this TV only syncs if audio connected? any ideas?
Zebidee i know you made cables, im going to PM you, ok?
Cheers