Famicom AV Modification / Mod

[133MHz]

Then get this.

[Scorp.ius]

yes thanks, i allready have searched for such devices on ebay
i have tested the famicom on my other TV. its a samsung HD Ready LCD and there it is in color. thats  for testing purposes of course since i dont want the famicom running on an LCD 

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BUT there are some kinds of ghost images on the screen and a stripe of ghost pixels in the middle of the screen... is there something wrong with my mod, or is the NTSC acceptance of my TV not as good as it should?

i try to make a foto of this...

in Donkey Kong 3 there is the Ghost Stripe in the middle of the screen. this is in every game and depends on the colors that are onscreen

in SMB there is a ghost bush - the original bush (see PicInPic) was on the left side of the same screen... this is in every game here and there.

[rob]

Hello,

On a recent trip to Japan I picked up a Famicom wooo!
I knew there would be problems with actually displaying the games as Australia uses the PAL standard but no worries I would just complete the AV mod.

I have now attempted the AV mod without any success. I think the problem lies in the 5v input for the video source, using the ground off of the reset switch there seems to be no voltage potential from the specified pins on the article or any of the surrounding pins.
Also there is no audio, so this leads me to believe something must be broken? I'll try and get a few photos up but if anyone has any ideas please chime in.

Rob

[MattyD]

I have a question about applying the AV mod to a Fami board with the posts marked 'video', 'audio' and 'grnd'.

Having researched the Japanese guide linked earlier in this thread (Google translated here) I read some posts on another forum saying this mod is essentially adding a poor amplifier directly to the board. Take that out and you can pretty much run the cables directly from those points to the RCA jacks although the signal would be very weak.

So now I'm thinking a better solution would be to build Kefka's amp board but attach it to the points marked on my board (assuming I only have mono sound so there's only one cable to connect). Is there any reason why this wouldn't work? I've pretty much got nothing to lose so it's got to be worth a shot.

[JunjiHiroma]

yes thanks, i allready have searched for such devices on ebay
i have tested the famicom on my other TV. its a samsung HD Ready LCD and there it is in color. thats  for testing purposes of course since i dont want the famicom running on an LCD 

-

BUT there are some kinds of ghost images on the screen and a stripe of ghost pixels in the middle of the screen... is there something wrong with my mod, or is the NTSC acceptance of my TV not as good as it should?

i try to make a foto of this...

in Donkey Kong 3 there is the Ghost Stripe in the middle of the screen. this is in every game and depends on the colors that are onscreen

in SMB there is a ghost bush - the original bush (see PicInPic) was on the left side of the same screen... this is in every game here and there.

I probably have THE same exact samsung as you.i bought a Composite to S-Video cable from s-video.com,it seemed to get rid of the ghost pixels but the stripeyness still remains

[honeymustard]

Hey guys,

I'm trying to AV mod my Famicom, using the guide on the site. However, it seems like the board I have is quite different to the one picture in the guide, so I can't figure out where to solder.

I bought it pre-modded, but I couldn't seem to get a picture (I know it works though), so I removed the mod to redo myself.

Here's a picture of the board that I have:



I also have some photos of the previous mod, if those would be any help.

Any help would be greatly appreciated 

[ericj]

Your system looks like a famiclone, not an original famicom. Could you post some more pics of it, perhaps of the mod and the other side of the boards? The Makko Toys, LTD is a good tip-off that it's not an original Nintendo Famicom.

[honeymustard]

Yes I was a little bit suspicious, but I don't know, apart from that board, everything looks really genuine.

Anyway, here are all the photos I took of the mod before I removed it. I also re-did the mod myself by using the pictures (I was hoping that previously a solder point had broken or something..) and didn't get a picture.


General overview of the mod.


I assume this is the booster for the video, though I don't know exactly (seems factory made - not handmade).


RF board (note the hole in the voltage regulator... replaced that  )


This is the main board - looks pretty authentic to me.


The case. Again, looks like it's authentic.


Also, I suppose it would be a good idea to mention that I originally used an AC power adapter (NES) which blew a hole in the voltage regulator. However, I did replace it, and seeing as an LED works, I guess the whole thing is working.

[JC]

Looks like everything is authentic, except for the second smaller board, which is definitely from a Famiclone based on the corporate markings. I'm pretty sure I've seen that dude with the hat on same Famiclones or pirates or something...

[honeymustard]

Seems that way. Still, shouldn't really be a problem though right? The AV mod described on the site uses the main board only anyway. I just can't figure out how to mod the board that I have.

I did see a guide on a Japanese site that was posted here a while ago, but the pictures are microscopic, and the text makes no sense when translated 

Edit: also, would it be possible to get a replacement RF board perhaps? I guess something other than the voltage regulator might have gone as well when I used the AC power supply... hmm.

[JC]

Somebody ought to know how to do it. Seems there were several versions of the Famicom board, and unfortunately, our mod page only shows one of the boards.

[honeymustard]

Ok, I've had a long hard look at two guides on this Japanese site, and I think I know what to do now. I'm going to pick up the parts this week and I'll let you know if I get a decent picture out of it. If not, I'm going to assume it's broken and try and get another Famicom at some point.

http://66.102.9.104/translate_c?hl=en&sl=ja&tl=en&u=http://www.h3.dion.ne.jp/~kuboken/famicom/famav.html&usg=ALkJrhiHrSw39ULLIEDIF9ViC3Mn5Mz4YQ

That's the guide I'm using. I know the pics are small but it does look simple enough.

[honeymustard]

Ok, I tried the mod on the page and the best I could get was an extremely fuzzy and distorted black and white, rolling picture. I guess my famicom is dead - ah well. Hopefully in the future I can get a new one, that I know is 100% official and works 

[133MHz]

Are you in a PAL country? Maybe your AV mod is fine but your TV can't sync to the Famicom's NTSC signal.

[honeymustard]

I am, and I guess it's possible, but I've imported pretty much all my other consoles from the US and they work fine. I might try it on another TV I have, but I doubt I'll get anything from it.