Famicom AV Modification / Mod

[133MHz]

You're talking about this one?


I tried following it, but it's confusing. The point marked "+5v" is really a ground, and the point marked "in2" is really +5V. "in1" is the video input. And yeah, the transistor connection is somewhat reversed . So I've just followed the schematic on the Japanese page (had to add a 75 ohm resistor in series to make my TV happy), and while at it, drew a nice schematic.

I can assure that my schematic is pretty straightforward, and 100% tested & working .

[cheaters5677]

Thanks.  i now know where the ground is. By the way, what is the voltage rating of the 47uF capacitor you used?

[133MHz]

I can't remember exactly right now, but the voltage is so low that anything will do .
In fact I just took the first 47uF capacitor that I saw lying around my parts bin.

[Rogles]

the cheap version, as was done to my famicom, is actually very simple. get your uncle or someone to show you soldering, which isn't as tough as it looks, and the rest is a cinch, but if you're using an FDS or AD3, I still haven't found out how to get the extra audio.

Edit: Pin 3 (counting from left and looking towards RF modulator) contains the mixed audio, so my A/V modified famicom is now functioning perfectly with a very easy mod (solder just a few wires).

Does the "Cheap" version support the FDS's FM synthesis sound? Also, could you link a guide to it?

[nintendodork]

Tired of R/F switches, Rogles?

[Rogles]

Yeah... I also want to be able to play on more TVs than the crappy old one in my attic.

[xyzzy32]

Originally, no.
me4taki9oh soldered the audio wire to the SOU pin on the motherboard, which does not include enhanced cartridge sound. I simply had to remove this connection, then resolder the wire to a different pin located where the audio leaves the motherboard and enters the RF output box.
So, in short, yes, it does work just fine with the FDS and other cartridge sound enhancements.

There is no guide for this mod of which I know; if you want, if anyone has high-resolution pictures of the motherboard, I can show you which pins you need to tap onto to complete the mod.

[Mindfreak]

Hello all ,


I'm looking to buy a Famicom very soon...( in a month and a half or so...)

but I'm not having any luck finding an AV modded one. 

so I was wondering is ther anyone here who could maybe mod it for me ?


I can pay for shipping and any parts that may be required...


Thanks for your time.

[133MHz]

PM sent

[jimhmphry]

i 2 got my first fami from me4taki9oh and had the same thing but 133 came to my rescue  thanks again 133

[Mindfreak]

Hey 133,

How much would you charge me for the mod ?


Thanks for your time.

[Lolmann]

How do i do that without ruining my famicom? i want it to output analog video and mono sound.

could anyone post the guts of their AV modded famicom so i could see how its made?

[Lolmann]

Here's the transcoder Arnold101 found on Play-Asia.com .

Maybe this could be stickied somewhere on the site to help our members trying to play their NTSC Famis on PAL TVs

umm its AV only >_> show me a NTSC RF to PAL RF and im happy

i also looked at this and i didn't understand a shit could you make a version for a technical noob to understand

http://www.famicomworld.com/Workshop/AV_Mod.

EDIT: should i pay some guy that knows technical stuff and shit to modify it?

[133MHz]

Read this whole thread. Me & several other members have contributed with valuable information .

[Lolmann]

Okay, but i dont think i will do it myself, because i dont want to bust up my famicom.