1989 Famicom with true rgb, s-video, stereo sound

[Drakon]

This's still a work in progress:





What's done so far: true rgb, s-video, both look crystal clear (no jailbars or video interference at all).

what I learned from working on this:

You can completely remove the rf box and run the system using just the regulator and power jack, I also soldered in the original fuse just to be on the safe side.

Relocating the rgb kit to the back and having the rgb signals travel to the back adds a lot of interference to the image (jailbars and such), which means I'm going to have to wire up all 40 ppu connetions by ide cable (shouldn't be a problem) so I can fit the kit in the back.

The case of the original famicom is freaken tiny, making things fit inside of it is a nightmare.

It seems that jailbars are mostly curable by having the rgb from the ppu go directly into a video encoder at extremely close range.  Even adding a couple of inches of length between the kit and the ppu adds jailbars so distance is very important.

What's left to do: A lot of things, you'll see as it comes along, I still havn't wired up the upgraded audio circuit but that shouldn't be an issue.

When desoldering the ppu and installing the precision socket some random trace broke (it wasn't a ppu trace).  The trace physically looked fine so it took me forever to fix this issue.  That and being too busy with life.

[80sFREAK]

Looks like mums basement

[Drakon]

Looks like mums basement

It's the top floor of the house me and my girlfriend own.  Anyway this machine's done:





Demonstrational video thing:

http://www.youtube.com/watch?v=wkdapA2xx0o&feature=youtu.be

If anyone wants to know how to wire nes controller ports into a famicom here you go:

[keropi]

nice job 
my only "disagreement"  is the excessive use of hotglue, in case you need to fix something it will be a nightmare with all that glue 

[famifan]

It seems that jailbars are mostly curable by having the rgb from the ppu go directly into a video encoder at extremely close range.  Even adding a couple of inches of length between the kit and the ppu adds jailbars so distance is very important.

you forgot about separating analog circuits from digital by properly made shielding

[Drakon]

nice job  
my only "disagreement"  is the excessive use of hotglue, in case you need to fix something it will be a nightmare with all that glue  

Getting the hot glue off is very easy.  I actually had the power lines break because they weren't glued down (so they got pinched).  I repaired them, glued them, not it all works great.

It seems that jailbars are mostly curable by having the rgb from the ppu go directly into a video encoder at extremely close range.  Even adding a couple of inches of length between the kit and the ppu adds jailbars so distance is very important.

you forgot about separating analog circuits from digital by properly made shielding

In the case of rgb in a nes / famicom shielding makes no difference with jailbars.  The universal jailbar cure is just having the ppu signals go directly into the sony cxa2075 (or rgb amp) circuit with no distance in between.  I guess since the rgb right from the ppu is so weak it's very easy for it to pickup interference.  Once the rgb passes through an amp it doesn't pick up interference as easily.