FamiCLONE Video Mod Fix ?? possible?

[Rogerwilco]

Hi there, i own an original Famicom and i did the AV mod from the jpx72 tutorial and it is working perfectly. The picture is just crisp, perfect, no issue at all with the original Famicom

Then We tested 2 famiCLONES, which are supposed to be a clone of the original but the picture is really bad.  We tested 2 famiclones and different video cables and 9v power and we got the same results. FamiClones were giving some kind of video interference that always appears when there is movement near another picture. Even if the screen has only words, there is interference.

I want to know if there is some kind of mod that could be done to a famiclone, just like on the jpx72 tutorial, because i know that capacitors are really good for removing interference,  but i don´t know what can i do since the board is different, in the original you need to remove a transistor and soder cables to it, but the famiclone is really different.

any idea?


these are pictures taken from a famiclone:






these are pictures taken from the original japanese famicom with av mod.:







Post Merge: December 19, 2015, 05:47:13 pm
damn clone, i can´t fix it


famicom:


famiclone mario princess:

[FAMICOM_87]

Do not remove that transistor just follow  this scheme nothing else !

http://jpx72.detailne.sk/modd_files/fc/avmod/avmod.png

add base on an PNP transistor to pin 21 from PPU collector to the nearest ground possible, and emitter to resistors and capacitor just like the scheme shows you , grab 5 V from nearest possible trace from the board  (try with multi-meter where is + 5 vcc
(ask 80sFREAK or JPx72 for compatible PNP transistors you can use)
You will still can use RF as well, and A/V picture quality will be ok too   

[famifan]

(ask 80sFREAK or JPx72 for compatible PNP transistors you can use)

are you joking???

any low power general purpose PNP transistor will be totally satisfiable and is all you need. Working frequency is relatively low and it doesn't make any sense for finding special purpose transistor.