Super Cdrom2 RGB mod

[delucep]

Hi all,

Is there a thread on how to change the 5 pin din to an 8 pin with an rbg mod and amp, also so there a recommended supplier to get the components from?

Thanks!

[Keith Courage]

Pretty much the same as a DUO as far as the DIN 8 port is concerned. But then you need to tap the video signals from the Expansion port pins.

Here is a diagram of the expansion port pins. 


Another thing of note is that the Din port on the super cd rom doesn't have 5V going to pin 4 like a DUO does. So you will have to solder a wire there and get 5V from somewhere. I just grab is straight from the 7805 voltage regulator but I'm sure there are other spots that can be used.

[herr-g]

There is an open solder jumper 'J1' on the PCB bottom near the DIN connector. If you bridge it, you have +5V on Pin4 as usual ^^

[delucep]

Thanks both!  The picture looks a bit dark to me, all the colours are correct but the brightness/contrast looks "wrong", if that makes sense - any suggestions? Thanks again!

[herr-g]

You have to add a RGB amp, as with all PCE RGB mods.
I've done my own THS7374 amp a while ago, based on Voultar's schematic (Link). You can download the gerbers and find some installation pictures incl. a SCDROM

[delucep]

There?s an Rgbamp added.  Rgb and 5v are all there, must be something I?m missing.
Thanks

[Keith Courage]

The RGB signals in all PC engine/turbo systems need to be amped. The signals are just not strong enough to be used straight to any TV or upscaler.

https://www.ebay.com/itm/126245283711?chn=ps&norover=1&mkevt=1&mkrid=711-117182-37290-0&mkcid=2&mkscid=101&itemid=126245283711&targetid=1529493975022&device=c&mktype=pla&googleloc=9016213&poi=&campaignid=19851828444&mkgroupid=145880009174&rlsatarget=pla-1529493975022&abcId=9307249&merchantid=114729822&gad_source=1&gclid=Cj0KCQjw8J6wBhDXARIsAPo7QA-bw-Ih_A1UCGs1agHqMHFvtUUyayKdBoePDwL8UKfZqC1Z4r_zvjAaAjI6EALw_wcB

or

https://voultar.com/index.php?route=product/product&product_id=53

[delucep]

It was down to the retrotink, put it through the tv and it looks stunning and not dark at all.

Thanks for you help and info both, really appreciated.