Amiga 1200 and scart cable

07 March 2007, 02:04

This is probably very easy problem that has been solved somewhere here but i have to find a fast answer.I have amiga 1200 and scart cable, when i connect it to my tv (Sony Trinitron KV-32FX68E) i get only a white picture.Why is this and how can i solve this ?

Retro-Nerd · 07 March 2007, 02:09

Have you switched to the RGB? On the other side, some Sony TV sets got problems with some scart cables. I had a similiar problem too (pale color, low contrast). But i got a another cable with 150 ohm, this one works fine.

07 March 2007, 02:48

Quote:

Originally Posted by Retro-Nerd

Have you switched to the RGB? On the other side, some Sony TV sets got problems with some scart cables. I had a similiar problem too (pale color, low contrast). But i got a another cable with 150 ohm, this one works fine.

Scart connector in tv is RGB if that is what you mean.

Retro-Nerd · 07 March 2007, 03:00

Quote:

Originally Posted by Picard

Scart connector in tv is RGB if that is what you mean.

Is your TV set auto-switching to the RGB video signal, i assume that? You need another cable when it's not working. The cable isn't broken, only a bit "incompatible" to some Sony TV sets.

Sune Salminen · 07 March 2007, 03:06

As far as I know the Amiga does not supply current on pin 16 (AKA blanking pin).
Some TVs need this to switch into RGB mode on the SCART automatically, otherwise they will stay in composite video mode, which is also possible on the SCART.

I'm not totally sure about the Amiga not supplying this voltage, so you better check for yourself! I know my old Amiga 500 didn't do it. The cable worked fine in RGB mode with my CM8833 and with another monitor (neither needed any signal on the blanking pin) but not with my first SCART TV.

Are you sure your TV is set to SCART/RGB?

Also, it could simply be broken, so if you have a multimeter or cable tester, try checking the cable.

Retro-Nerd · 07 March 2007, 03:10

This is a well known Sony problem. Try another cable, this will fix it. It looks like you got a cable without a switching voltage on the pins 8/16

Sune Salminen · 07 March 2007, 03:20

So the Amiga 1200 does supply this voltage on pin 16?

I would think that if the problem was simply cable resistance he would at least get a faint image?

Retro-Nerd · 07 March 2007, 03:28

Quote:

Originally Posted by Sune Salminen

So the Amiga 1200 does supply this voltage on pin 16?

I would think that if the problem was simply cable resistance he would at least get a faint image?

Yes, i'm a bit surprised too. He should see a least a faint image. Maybe it is a cable for a 1081/1084s monitor. This one needs no switching voltages.

musashi5150 · 07 March 2007, 08:58

I had the same problem with my CDTV and my JVC TV - just a white screen. I tried another scart I had lying around and it gave the same problem. So I gave up and used RF

darkwave · 06 June 2007, 22:10

I just got an RGB scart lead for my Amiga and it gives nothing but white when I plug the cable into the composite scart connector on the back of my tv.
When I plug into the RGB enabled scart the picture sometimes rolls and has wavy green lines across it, which is a shame as apart from this the picture looks nice and crisp and colourful. I'm guessing the signal is too weak as I can just about make out some ghosting of the words "no signal" running up the screen as it rolls.

Jope · 07 June 2007, 07:12

The Amiga has +12V and +5V on the video port, so yes, it can supply the blanking and switching signals to the TV.

(just made myself an Amiga to RGB Scart cable yesterday)

07 March 2007, 02:04	#1
Picard Posts: n/a	Amiga 1200 and scart cable This is probably very easy problem that has been solved somewhere here but i have to find a fast answer.I have amiga 1200 and scart cable, when i connect it to my tv (Sony Trinitron KV-32FX68E) i get only a white picture.Why is this and how can i solve this ?

07 March 2007, 02:09	#2
Retro-Nerd Missile Command Champion Join Date: Aug 2005 Location: Germany Age: 52 Posts: 12,446	Have you switched to the RGB? On the other side, some Sony TV sets got problems with some scart cables. I had a similiar problem too (pale color, low contrast). But i got a another cable with 150 ohm, this one works fine. Last edited by Retro-Nerd; 07 March 2007 at 02:21.

07 March 2007, 03:06	#5
Sune Salminen Dinamáquina Join Date: May 2002 Location: BH/Brasil Age: 49 Posts: 370	As far as I know the Amiga does not supply current on pin 16 (AKA blanking pin). Some TVs need this to switch into RGB mode on the SCART automatically, otherwise they will stay in composite video mode, which is also possible on the SCART. I'm not totally sure about the Amiga not supplying this voltage, so you better check for yourself! I know my old Amiga 500 didn't do it. The cable worked fine in RGB mode with my CM8833 and with another monitor (neither needed any signal on the blanking pin) but not with my first SCART TV. Are you sure your TV is set to SCART/RGB? Also, it could simply be broken, so if you have a multimeter or cable tester, try checking the cable. Last edited by Sune Salminen; 07 March 2007 at 03:17.

07 March 2007, 03:10	#6
Retro-Nerd Missile Command Champion Join Date: Aug 2005 Location: Germany Age: 52 Posts: 12,446	This is a well known Sony problem. Try another cable, this will fix it. It looks like you got a cable without a switching voltage on the pins 8/16 Last edited by Retro-Nerd; 07 March 2007 at 03:18.

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07 March 2007, 03:20	#7
Sune Salminen Dinamáquina Join Date: May 2002 Location: BH/Brasil Age: 49 Posts: 370	So the Amiga 1200 does supply this voltage on pin 16? I would think that if the problem was simply cable resistance he would at least get a faint image?

07 March 2007, 08:58	#9
musashi5150 move.w #$4489,$dff07e Join Date: Sep 2005 Location: Norfolk, UK Age: 42 Posts: 2,351	I had the same problem with my CDTV and my JVC TV - just a white screen. I tried another scart I had lying around and it gave the same problem. So I gave up and used RF

06 June 2007, 22:10	#10
darkwave Registered User Join Date: May 2004 Location: UK Posts: 262	I just got an RGB scart lead for my Amiga and it gives nothing but white when I plug the cable into the composite scart connector on the back of my tv. When I plug into the RGB enabled scart the picture sometimes rolls and has wavy green lines across it, which is a shame as apart from this the picture looks nice and crisp and colourful. I'm guessing the signal is too weak as I can just about make out some ghosting of the words "no signal" running up the screen as it rolls.

07 June 2007, 07:12	#11
Jope - Join Date: Jul 2003 Location: Helsinki / Finland Age: 43 Posts: 9,863	The Amiga has +12V and +5V on the video port, so yes, it can supply the blanking and switching signals to the TV. (just made myself an Amiga to RGB Scart cable yesterday)

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