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Old 24 January 2009, 22:26   #1
JackTheKnife
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A500 and RGB to S-Video adapter

Where on the motherboard I need to solder wires for RGB to S-Video adapter?

Thanks
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Old 24 January 2009, 22:58   #2
Zetr0
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@JTK

hello there, alas the A500 does not have the nessasary signals (internally) to give you SVideo Y/C you will need to modify the A520 modulator, its not overly for beginers either.

I will have a dig - about for the schematicsd for you.
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Old 24 January 2009, 23:00   #3
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I have this:

http://cgi.ebay.com/ws/eBayISAPI.dll...2BSI%26otn%3D4
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Old 24 January 2009, 23:35   #4
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Quote:
Originally Posted by Zetr0 View Post
@JTK

hello there, alas the A500 does not have the nessasary signals (internally) to give you SVideo Y/C you will need to modify the A520 modulator, its not overly for beginers either.

I will have a dig - about for the schematicsd for you.
Big Z, my friend: there is not much hard to convert an A520 to S-VHS (aka Y-C) output.

It's just a matter of following this design.
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Old 25 January 2009, 00:08   #5
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Quote:
Originally Posted by JackTheKnife View Post

looking at this you will need to connect RGB Hsync / Vsync and Ground.

there should be a manual with this unit.

have a look on pinouts RU and the Amiga 23pin Video out.
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Old 25 January 2009, 00:08   #6
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Originally Posted by rkauer View Post
Big Z, my friend: there is not much hard to convert an A520 to S-VHS (aka Y-C) output.

It's just a matter of following this design.
indeed for us my good friend, but alas I am unaware of JTK's level of soldering
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Old 25 January 2009, 03:00   #7
JackTheKnife
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Quote:
Originally Posted by Zetr0 View Post
looking at this you will need to connect RGB Hsync / Vsync and Ground.

there should be a manual with this unit.

have a look on pinouts RU and the Amiga 23pin Video out.
I have schematics too, but it looks like I need to connect all RGB + sync wire at back side of motherboard. Am I correct?

Here I have two options:

1) before resistors



2) after resistors


Last edited by JackTheKnife; 25 January 2009 at 03:22.
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Old 26 January 2009, 20:54   #8
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Quote:
Originally Posted by Zetr0 View Post
indeed for us my good friend, but alas I am unaware of JTK's level of soldering
I am mid level of this. I bought KADA as you suggest and did my first fixing (A1200 composite issue) and modding (8MB Fast + 1MB Chip on A500).

Anyway, Zetr0, any tips about connecting those RGB wires?
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Old 27 January 2009, 04:20   #9
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Don't use the internal RGB lines! They will not work at all for what you want!

Instead, you need to modify an A520 to achieve what you want.
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Old 27 January 2009, 09:56   #10
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@Jack

Cool, that Kada is indeed a life send ,

now looking at what the unit is expecting and the signals you have, just use the video port

grab a 23pin Dsub or hack down a 25 pin, then connect the R, G and B. Then connect HSync, Vsync and Ground to the correct positions on the board.
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Old 06 February 2009, 02:49   #11
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I have got this to work through hacked down D-Sub 25 pin but I have an issue with a weaving screen which makes the composite video out not sharp enough.
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