My Famicom

[nintendodork]

I'm not sure, I'm gonna pass it over to 133, I'm out of ideas now...
And don't double post, modify the first one instead

[jimhmphry]

flips having the same prb im having look at my ghostlines topic ive tried a sms, sg, tg16 and cheap univer one that came with my tg16. the only thing i can fig is that the guy that mods these 4 the seller we bought from uses very cheap old av cables mine didnt look like much care was taken when they did mine. look at the last post of my ghostlines topic!

[Flip]

How do I replace a capacitor though? Also my problem IS NOT related to the AV cables. The lines still show when I use the RF switch which proves that, for me at least, the lines aren't caused by the modification

[jimhmphry]

ive tried  4 power plugs none make diffrence

[ooXxXoo]

Alright fellows, you are a bit lost on this topic regarding the Famicom ghosty lines...Unfortunately, the problem itself has to do with something much bigger, other than just a power supply capacitor...133Mhz is definitely a great guy full of knowledge, but I believe the capacitor issue was, as he recalled, just a theory....The ghosting effect has to do with an issue of the PPU Sync pin being relatively close to some of the PPU control bus signal pins, among some video noise caused by the CLK crystal...In other words, a bad design....After some experimentation, I've finally been able to get rid of them in a Famicom.....A filter amp has to be built around the PPU Sync pin 22 and the native 21.47727 Xtal....The NES has it, so does the Famicom AV...

[Trium Shockwave]

Interesting. It's not something I ever noticed until I got my Famicom and hooked it up to my HDTV. My NES was stolen years ago, long before the rise of digital TVs. I guess this is something you tend not to be able to see until you hook them up to a high quality display?

[nintendodork]

Mine is hooked up to a flatscreen TV...I forget what they call it though, it's screen is like an HDTV..I've noticed very, very faint lines too.  But I can only notice them when I play a game like SMB with a bland background.

[ooXxXoo]

Don't worry guys...Like I said, this is normal, due to the bad design.....The ghost lines are there in all old RF Famicoms...They are just not that visible because of all of the RF interference blurrr.... But when the RF video is transcoded/divided into the single composite video, you'll definitely see them..Even my Sharp Twin system with the native factory composite video has them very noticeable in my Tv set up....Although, one thing if for sure, some Famicom video modification modders can be great and try to hide them as much as possible (with better  composite video amplifiers), while others just do a bad, sloppy jod.

[ericj]

I disagree. My Sharp Twin doesn't show ghost lines. I can use mine on a top-of-the-line hdtv and crt rptv and there are no ghost lines visible from it or my av modded Famicom.

[ooXxXoo]

I disagree. My Sharp Twin doesn't show ghost lines. I can use mine on a top-of-the-line hdtv and crt rptv and there are no ghost lines visible from it or my av modded Famicom.

It is more noticeable in some tv's than in others....

[Flip]

Thanks for the clarification, ooXxXoo. Do you think that if I sent it to Nintendo or something they could add the filter for me?

[ooXxXoo]

Thanks for the clarification, ooXxXoo. Do you think that if I sent it to Nintendo or something they could add the filter for me?

I don't think Nintendo will ever service the Famicom, NES, SNES or even the N64 again, but I could be wrong...They have been, as people know it, discontinued...Besides, this is an issue that you weren't supposed to be aware of to begin with....

[Flip]

Well, if they can't help me, is there a way I could add the filter myself?

[ooXxXoo]

Well, if they can't help me, is there a way I could add the filter myself?

Well, is not just a filter what you need, but a whole circuit has to be built around the PPU, which includes, a few resistors, capacitors and a transistor, in other words, all of these factors combined will act as a filter.... I'll write the schematic someday and freely post it....But soldering and a little of electronic knowledge is required..... If I was you, I won't really bother with it for now...

[Flip]

Ok then. I guess this is the end of the post, because I know pretty much everything I need to. Thanks again to everybody who helped.