Main > Monitor/Video Forum
How to use SCART for our hobby
Zebidee:
Try this (below), which I've seen for other Toshiba models. But don't ask me what it means, except that by "keyboard" I *guess* they mean the remote. One usually needs an original remote to get access to service modes - universal remotes usually don't cut it, although you might get lucky
--- Quote ---"Press 'MUTE' button. Press and hold 'MUTE'
button and press 'MENU' on local keyboard."
--- End quote ---
technocop:
--- Quote from: Zebidee on October 14, 2009, 05:19:04 am ---Try this (below), which I've seen for other Toshiba models. But don't ask me what it means, except that by "keyboard" I *guess* they mean the remote. One usually needs an original remote to get access to service modes - universal remotes usually don't cut it, although you might get lucky
--- Quote ---"Press 'MUTE' button. Press and hold 'MUTE'
button and press 'MENU' on local keyboard."
--- End quote ---
--- End quote ---
I don't have the original remote, but I'm pretty sure it didn't have a "menu" button.
I have a Logitech Harmony, so I reckon I could I could probably access it...IF I knew what the commands were...
cheers anyway...
Em:
Hello,
I've got an ArcadeVGA card hooked up to my TV via a hand made VGA to SCART cable. The ArcadeVGA is the PCIe (Radeon HD2400 based) one. The TV is a really old Sony KV-25F1U. The TV does support an RGB signal. The PC is running XP SP3. The cable started off as an Ultimarc VGA breakout cable and it seems to work OK. The Windows boot screens display correctly and I can get a Windows desktop displayed at 640x480 interlaced without a problem. But I'm having trouble getting some of the other resolutions working in Windows. Specifically the non-interlaced resolution of 640x288. When I use quickres to switch to 640x288 I get a picture but with a very fast vertical scroll. It looks like an vsync problem. Here is how my cable is wired up:
VGA SCART
1 -> 15
2 -> 11
3 -> 7
6 -> 13
7 -> 9
8 -> 5
10 -> 17
13,14 -> 20
5 -> 21
PC Power SCART
+12v -> 8
+5v -> 100Ohms -> 16
0v -> 18
Audio SCART
Left -> 6
Ground -> 4
Right -> 2
So I have both VGA sync pins (13 and 14) connected to SCART pin 20. I tried some of the other resolutions out too (all in Windows at the moment not MAME). 240x240 worked OK, as did 256x240. When I went up to 256x256 though, I just got a black screen and had to reboot into XPs VGA mode. I've also tried rebuilding Windows and reinstalling the AVGA drivers. Still the same thing. One thing on the cable I wasn't sure about was connecting VGA pin 5 to SCART pin 21. Both are grounds. I've tried with those pins connected and disconnected and it doesn't make any difference.
So I'm at a bit of a loss as to what to try next. Hence this post. I'm after some advice! Does this sound like a VGA-SCART cable problem? Or a Windows driver problem? Maybe I've got a duff ArcadeVGA card? Or maybe it's the ancient TV I'm trying to use? Or have I just done something really daft in my wiring above!? Any thoughts gratefully received. This forum has been extremely useful in getting to this point. And thanks for reading this far. (Sorry for the long post!)
Em.
Zebidee:
Em
Sorry for the late post.
From the way you describe it, the SCART cable seems fine. If it works at one res it will work for another. I think that your problem is that your TV is old, or at least doesn't accept a large range of sync frequencies. Every TV is a bit different. Some older TVs don't like doing > 240 lines. I have an old Sony TV that won't do > 240 lines but does interlaced modes like 640x480, and a Sony 21" professional video monitor that does 640x288 flawlessly but just won't do 640x480!
Remember that 640x480 is an interlaced mode, and 640x288 is non-interlaced - Your TV is capable of 240 vertical lines (240x2=480) and does interlacing, but it seems that it can't do 288 vertical lines without scrolling (have you tried a V-Hold knob?).
cheers, Zeb
Zebidee:
.
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