A500 and RGB to S-Video adapter

JackTheKnife · 24 January 2009, 22:26

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

Thanks

Zetr0 · 24 January 2009, 22:58

@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.

JackTheKnife · 24 January 2009, 23:00

I have this:

http://cgi.ebay.com/ws/eBayISAPI.dll...2BSI%26otn%3D4

rkauer · 24 January 2009, 23:35

Quote:

Originally Posted by Zetr0

@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.

Zetr0 · 25 January 2009, 00:08

Quote:

Originally Posted by JackTheKnife

I have this:

http://cgi.ebay.com/ws/eBayISAPI.dll...2BSI%26otn%3D4

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.

Zetr0 · 25 January 2009, 00:08

Quote:

Originally Posted by rkauer

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

JackTheKnife · 25 January 2009, 03:00

Quote:

Originally Posted by Zetr0

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

JackTheKnife · 26 January 2009, 20:54

Quote:

Originally Posted by Zetr0

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?

rkauer · 27 January 2009, 04:20

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.

Zetr0 · 27 January 2009, 09:56

@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.

JackTheKnife · 06 February 2009, 02:49

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.

24 January 2009, 22:26	#1
JackTheKnife Amiga Fetish Join Date: Dec 2008 Location: Downstate NY Age: 49 Posts: 267	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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24 January 2009, 22:58	#2
Zetr0 Ya' like it Retr0? Join Date: Jul 2005 Location: United Kingdom Age: 49 Posts: 9,768	@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.

24 January 2009, 23:00	#3
JackTheKnife Amiga Fetish Join Date: Dec 2008 Location: Downstate NY Age: 49 Posts: 267	I have this: http://cgi.ebay.com/ws/eBayISAPI.dll...2BSI%26otn%3D4

27 January 2009, 04:20	#9
rkauer I hate potatos and shirts Join Date: Oct 2007 Location: Sao Leopoldo / Brazil Age: 58 Posts: 3,482	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.

27 January 2009, 09:56	#10
Zetr0 Ya' like it Retr0? Join Date: Jul 2005 Location: United Kingdom Age: 49 Posts: 9,768	@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.

06 February 2009, 02:49	#11
JackTheKnife Amiga Fetish Join Date: Dec 2008 Location: Downstate NY Age: 49 Posts: 267	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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