Anyone using a CMVS-RGB pcb for MVS SCART/RGB?

[SVM]

Maybe this or the wires are routed unfavourably in your MVS.

 

[LocalisedRetro]

Maybe this or the wires are routed unfavourably in your MVS.

Thank you. Will reroute them later. Much appreciated.

 

[LocalisedRetro]

Maybe this or the wires are routed unfavourably in your MVS.

I’ve cleaned up the wiring and all perfect now. Thanks for all your help.
Very much appreciated.

 

[LocalisedRetro]

@SVM Hi again. I’ve built another cmvs using this pcb and colours are fine but the image is very dark. Have you any ideas on what components I can change out that may brighten up the image?
Thank you.

 

[SVM]

Don't know - maybe bridging R14, R15, and R16?

 

[LocalisedRetro]

Don't know - maybe bridging R14, R15, and R16?

I was thinking that might work. Thanks, will give it a go. Cheers.

 

[LocalisedRetro]

Changed the values on R1-R4 and perfect now. Great work on this @SVM.
Much appreciated.

 

[SVM]

Cool! To what values did you change them and what MVS do you have?

 

[LocalisedRetro]

Cool! To what values did you change them and what MVS do you have?

I experimented with what I had available which led me to putting a 7.5k R1 and 1.5k R2/R4. I was prepared for problems but thankfully it’s perfect.

 

[SVM]

And what MVS do you have?

 

[LocalisedRetro]

And what MVS do you have?

Apologies I’ve an MV1FZS. Not the prettiest, but fully functional. Fully recapped and Unibios installed. 5v mod also.

 

[SVM]

Thanks for the photos. Now I see, why your picture might be too dark with the standard resistor values on the bypass pcb: You are grabbing the RGB signals before the "final" resistors R17, R24, and R32. When you solder the wires to the other side of the resistors the picture should be fine with the standard resitors on the bypass pcb.

 

[LocalisedRetro]

Thanks for the photos. Now I see, why your picture might be too dark with the standard resistor values on the bypass pcb: You are grabbing the RGB signals before the "final" resistors R17, R24, and R32. When you solder the wires to the other side of the resistors the picture should be fine with the standard resitors on the bypass pcb.

Ah thank you @SVM. Am I ok to leave it as is? I’d hate to take it apart and desolder all those controller connections again.

 

[SVM]

If it works and looks ok than it is ok.

 

[LocalisedRetro]

If it works a looks ok than it is ok.

Your help is very much appreciated. Thank you @SVM.