Print Page - AV Famicom - wierd ghosting and vertical lines

Title: AV Famicom - wierd ghosting and vertical lines
Post by: Hamtastic on February 18, 2024, 05:14:04 am

Hi All, new here hoping someone can give me some advice.
I recently bought a AV Famicom in Japan, and on getting it home i've got some video artifacting, i've tried switching powersupply, and both a generic set to 9v and my MK1 Megadrive PSU give the same results.
TV is clean on other video input, so I think its related to the Famicom somehow!

I'm used to soldering, so looking to repair it myself, so need some idea of where to start.

Thanks all.

Title: Re: AV Famicom - wierd ghosting and vertical lines
Post by: Pikkon on February 20, 2024, 02:36:40 am

Never seen this fault before.

I would change out the filter cap,should be a 1000uF at 25v.

Title: Re: AV Famicom - wierd ghosting and vertical lines
Post by: fredJ on February 21, 2024, 04:10:24 am

Nope, I have not seen that.
Broken trace somewhere? Faulty RAM?

Title: Re: AV Famicom - wierd ghosting and vertical lines
Post by: Hamtastic on February 21, 2024, 04:35:50 am

Thanks for at least taking a look.
I've picked up the caps for a recap and a spare PPU, I guess i'll see what works!
I'll post what I find out.

Title: Re: AV Famicom - wierd ghosting and vertical lines
Post by: Pikkon on February 22, 2024, 03:26:42 am

Awesome,hopefully you get it working.

Title: Re: AV Famicom - wierd ghosting and vertical lines
Post by: Hamtastic on April 12, 2024, 08:43:58 am

Finally had time to take a propper look and....
It was the TV /facepalm

I had completely forgotten the rest of my retro hardware uses RGB, so this was actually the first time i had used the composite input. Plugged it into my cheapo composite to HDMI adapter and bingo clean as it gets video.

I guess the moral of this story is, trust nothing especially things that work :-[

Famicom World

Family Computer => Technical & Repair Assistance => Topic started by: Hamtastic on February 18, 2024, 05:14:04 am