twin famicom vertical lines

[hvc01]

Hi,

First time poster short time follower. 

I have had my twin famicom AN500-R for a month now and I cannot really complain as it works fine. Only trouble is the vertical line problem which I assume are the so called jailbars. I have read about the av-mod and ppu shielding for the famicom but wanted some advice by a kind sole regarding what the best fix is, if possible. I have pulled the thing apart and the ppu has an aluminium heatsink covering it. I was thinking of shielding the ppu with aluminium tape and grounding this. Any thoughts or advice would be much appreciated.

Thanks

[fredJ]

I don't know of any fix, but if you install the RGB-kit it will fix the problem....
Although frankly I don't think the vertical lines are very noticeable on twin famicom. Try tweaking with the light on the TV a bit.
Maybe your console has severe case? If that is the case, sometimes the caps are getting old.

[hvc01]

Thanks for your help. All the caps look fine. Maybe they aren't good on the inside. Who knows

[hvc01]

Will go with an AV famicom instead 

[L___E___T]

To be fair you can get a crispy clear picture from 30 years old technology, but not usually straight outta the box.

I'm not into crispy clear for Famiom, but I hate jailbars.

I do however like RGB on the Mega Drive, that was very easy to achieve as it just needed an RGB cable, nothing more, and the result is very nice.

[modeltfordman]

My Twin also has jail bars, but tbh it is not really that noticeable unless I look for them.

[hvc01]

Well at the end of the day it isn't the end of the world. The games work and I can play them and they aren't terrible. 

[hvc01]

Hi again. So far I have made no progress with reducing the jailbars on this system. I lifted pin 21 and used the av mod circuit to output signal directly. Maybe a slight improvement but nothing major. Is there anything else I should try before I buy another one? Any advice or help much appreciated.

[hvc01]

I tried capacitor from pin 22 to 20, 220uF 16v. I will try pin 1 also. Where is the third place to decouple from? Also I'll try the copper tape. Maybe that'll sort this out. Thanks a lot for your help.   

[hvc01]

pin1?  There is nothing to do with pin1

sorry i saw the picture and its pin 1 of cpu which is grounded 

Can you upload some photos?

i'll upload some photos when i have another play with the console over the weekend. thanks again for your help.

i'm sure i'll get it looking better.
Post Merge: July 13, 2014, 03:20:04 am
The twin fami is dead  . I must have shorted it out when i tried to get some more copper tape around the ppu. Nevermind I have had success with an original fc and i some more on the way to keep me busy. Thanks for your help.