English Amiga Board - View Single Post - Amiga 1200

Steve T · 07 March 2016, 22:12

noticed since changing to a different display, my A1200 has weaker video than other machines, all using RGB/SCART, the TV itself is a bit weak too, not sure if its just a worn tube or the electronics, the colour (saturation) adjustment on that doesn't work at all for example & the contrast is not great.

anyway, i'll most likely replace that TV and i'm not sure why that might only be affecting the Amiga, wondering if its just the SCART cable? I don't want to open the cable unnecessarily though, does anyone know the typical resistance on a colour line of an Amiga RGB-Scart? the cable is maybe just over 1m long.

if that is OK, would it be a good idea to measure the voltages between each colour pin and ground & is it better to do this on a connected socket which is displaying video at the same time or disconnected at the TV end?

Or is this just normal and I should just turn the brightness up a bit on the TV?

Btw This machine is still on its original caps and all components, original PSU, expanded with ACA1231 and CF to IDE storage.

Tl;Dr, does anyone know the typical resistance of a colour line of an Amiga RGB-Scart? Thanks!

07 March 2016, 22:12	#1
Steve T Registered User Join Date: May 2013 Location: UK Age: 44 Posts: 351	Amiga 1200 - Weak RGB noticed since changing to a different display, my A1200 has weaker video than other machines, all using RGB/SCART, the TV itself is a bit weak too, not sure if its just a worn tube or the electronics, the colour (saturation) adjustment on that doesn't work at all for example & the contrast is not great. anyway, i'll most likely replace that TV and i'm not sure why that might only be affecting the Amiga, wondering if its just the SCART cable? I don't want to open the cable unnecessarily though, does anyone know the typical resistance on a colour line of an Amiga RGB-Scart? the cable is maybe just over 1m long. if that is OK, would it be a good idea to measure the voltages between each colour pin and ground & is it better to do this on a connected socket which is displaying video at the same time or disconnected at the TV end? Or is this just normal and I should just turn the brightness up a bit on the TV? Btw This machine is still on its original caps and all components, original PSU, expanded with ACA1231 and CF to IDE storage. Tl;Dr, does anyone know the typical resistance of a colour line of an Amiga RGB-Scart? Thanks!