Famicom Picture Problem

Started by Koi, April 09, 2021, 04:26:16 pm

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Koi

Bought supposedly working Famicom on eBay using official NES RF cable (NES-003) and I'm getting this:





Distorted, shaking image with TV noise. Did I get a defective unit? Anyway to fix this?

P.S.1 I don't think problem is the RF cable because it worked fine on Super Famicom.

P.S.2 People on reddit recommended me to try tweaking pot but when I opened the console, mine was blocked by metal plate and I have no idea how to remove it and access pot.

tombo72

Have you tried both CH 96 and 97? (1 and 2 on the back of the FC)
Reproduction FDS labels and disk cards | 3D printed Famicom parts | Custom Famicom labels | Tyvek disk sleeves | and More! https://www.nerdspaceship.com/famicom/

Koi

Quote from: tombo72 on April 09, 2021, 05:18:29 pmHave you tried both CH 96 and 97? (1 and 2 on the back of the FC)

It was CH 95 (1) and CH 96 (2) for me and yeah I tried both and got the same results.

tombo72

Quote from: Koi on April 09, 2021, 05:23:07 pm
Quote from: tombo72 on April 09, 2021, 05:18:29 pmHave you tried both CH 96 and 97? (1 and 2 on the back of the FC)

It was CH 95 (1) and CH 96 (2) for me and yeah I tried both and got the same results.

oops, yes, you are right.
Reproduction FDS labels and disk cards | 3D printed Famicom parts | Custom Famicom labels | Tyvek disk sleeves | and More! https://www.nerdspaceship.com/famicom/

P

I don't think the Famicom is defective, only the RF unit is noisy.

They say to move the pot a little in both directions a few times with a screw driver to shake off some oxidation and dirt, if you can figure out how to open the plating (I don't know how sorry).

Pikkon

You should be able to pry the metal plate off if I remember correctly but a av mod would be the best as it's a pretty easy and cheap mod to do.