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How to use SCART for our hobby
BLASTEROO:
Zebidee,
Thanks for the input! :cheers:
I forgot to mention that the Sony TV did actually switch to Av mode a few months ago, then it stopped doing that. Sorry!! My bad...!
I have built two different cables but nothing changed. The cables are OK as I have tested it on two different TVs and they switch super fast to Av mode, but not the Sony.
Any ideas?
orchidius:
I just did some more extensive testing (first time I just turned it on to see if it worked), and I noticed that the letters in windows were very hard to read... Is there an easy fix for that? Secondly, there's a whole chunk missing on the top of the screen too. Too much to ignore... How do I adjust the scanlines as you said to make it fit again?
Thnx!!
Zebidee:
@orchidius - it might just be a problem with your TV (e.g. vertical collapse - where the pic is not fully expanded vertically).
To adjust the overscan you need to enter service mode - that procedure is different for every TV. You need a service manual (i.e. not a user guide).
Otherwise, intelligent mode choice for MAME and other games will help to some extent. Info on how to adjust game video modes that can be found else where on this forum, and in other places.
BLASTEROO:
The problem was on the Tvīs PCB.
It was broken and the 12 volts the scart was sending didn't reach a resistor that appears to trigger the auto AV process.
Not always the scart/vga cable is to blame.
SOLVED
:cheers: thanks
orchidius:
Hi everybody,
So, here's the deal: I'm using an old CRT television in a my cab, and I think I broke it, but I'm not sure. It's a SCART tv, and the plan was to apply +5v to scart-pin 16 with a 100ohm resistor in line. However, the resistor was shot (I found out after I noticed something was wrong), so I accidently applied +5v directly to SCART pin 16 (ground pin 18). The tv popped and now the screen looks like this:
However, you hear some audio from the gameconsole that is connected to the tv, but it soon goes silent. No picture is ever visible on the screen.
So... Diagnostics? Is it fixable? Or do I have to throw it out?
Thanks!