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NEC TG-16/TE/TurboDuo => TG/PCE Repair/Mod Discussion => Topic started by: delucep on February 18, 2024, 10:56:51 AM

Title: Super Cdrom2 RGB mod
Post by: delucep on February 18, 2024, 10:56:51 AM

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!

Title: Re: Super Cdrom2 RGB mod
Post by: Keith Courage on February 29, 2024, 02:39:34 AM

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. 
(https://i.postimg.cc/z3PJ6h1b/PCE-IFU-Exp-pins.jpg) (https://postimg.cc/z3PJ6h1b)

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.

Title: Re: Super Cdrom2 RGB mod
Post by: herr-g on March 19, 2024, 09:17:57 AM

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 ^^

Title: Re: Super Cdrom2 RGB mod
Post by: delucep on March 22, 2024, 11:57:23 AM

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!

Title: Re: Super Cdrom2 RGB mod
Post by: herr-g on March 24, 2024, 05:38:39 PM

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 (https://github.com/herr-g/pcergb_pub)). You can download the gerbers and find some installation pictures incl. a SCDROM

Title: Re: Super Cdrom2 RGB mod
Post by: delucep on March 27, 2024, 02:39:46 PM

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

Title: Re: Super Cdrom2 RGB mod
Post by: Keith Courage on March 30, 2024, 07:22:11 PM

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

Title: Re: Super Cdrom2 RGB mod
Post by: delucep on April 11, 2024, 10:04:59 AM

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.