Technical and Repair Assistance

[uroko-sakanabito]

Hi there i finally got my Famicom Disk System and build it in my Sharp Twin Famicom;
It works perfekt and all my disks are working too !

Thank you for all you answers in the technical Thread
Now i am a owner of a 100% working Sharp Twin Famicom

[Doc]

Congrats man, and enjoy!

[JC]

what more can I check and how?

Wish I knew. Be absolutely sure you're using the right power adaptor.

[SuperMarioBrosSuperShow]

I opened up my famicom and saw that two of the wires in the AV mod were touching each other.  I separated the wires and now the sound seems to be working fine now.  I hope that was all it was.  Has anyone ever encountered this when messing around with AV mods?

[keiffer01]

I opened my Famicom again, trying to find the solution to my gray screen problem, and I noticed that the two big chips in the front of the Famicom board get BOILING hot. I don't actually have a Famicom adapter, so I made one by myself using a SNES adapter and a NES ac plug. Is it normal that the two chips get boiling hot? And could that be the problem to my gray screen? Please help me out guys! I really want to play with my Famicom!

[kite200]

wait, you're saying you used the nes power adapter and plugged it into your famicom? yeah uh thats why, now its time to find a new fami on ebay

[keiffer01]

wait, you're saying you used the nes power adapter and plugged it into your famicom? yeah uh thats why, now its time to find a new fami on ebay

no! that's not what im saying! What I did is I took a SNES adapter, since it outputs DC like the regular famicom adapter. Then I opened up a regular NES adapter, took the cord so that it can fit in the Famicom. I took the cord and cut off the SNES cord on the SNES adapter, and replaced it with the NES plug so I have a SNES adapter with a plug of a NES adapter It's rather hard to explain...

[kite200]

um, i dont know if thats good or not, ask madman. you probably shouldnt make a frankenstine creation like that

[133MHz]

Did you check the polarity while making the modification? IC regulators usually get very hot when they get reversed polarity. And if you're lucky no damage was done. Happened to me a while ago with some famiclones, the ICs get scorching hot but applying the correct polarity will make it work happily again.

[uroko-sakanabito]

I am still searching informations about the Twin Famicom RGB Mod; any idea about the build in board in my Twin Fami and about the cable i need to have full rgb ?

[133MHz]

Is that an IC socket without an IC in the first picture? Maybe that's your problem (it may be missing the NTSC to RGB converter IC or something).

[uroko-sakanabito]

Lol, there is no problem with it, i have just no idea for what it is... a few people including you, mean rgb... but for what the switch ?

[madman]

There'd be absolutely no sense in doing an RGB mod to an already composite signal.  You can't get the quality back.  You can't tap RGB off the PPU unless you use the one from the Titler.  It was probably an audio mod, those were pretty popular back in the day.

[uroko-sakanabito]

But whyshould someone add this new port for an audio mod ?
Stereo ports are added and this strange port with the switch...

I buyed a fitting RGB cable today.
Eventually i can test it tomorrow.

2 people say it's an RGB Mod 2 People say impossible

I have no idea
Me NOOB 

[madman]

Either way, that mod isn't going to do anything without an IC.  A bunch of resistors and caps won't change anything. It'd also be helpful to see where the signal is being tapped off the Famicom's PCB as well.