Instead of sound from my famicom i hear radio stations...

Started by tonev, February 01, 2012, 01:16:45 am

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tonev

Instead of sound from my famicom i hear radio stations... depending on what channel switch i use the radio station is different (this is happening only when i am not close to the system otherwise there will be a static noise only) I am connecting the console with the help of my vcr ( i have not checked my other tv) (on my sony tv the channels go to 60 and on my vcr it is working on chanels 75 and 205 ) i will try on my samsung tv and tell you the results    
Edit:
On my samsung tv without using the vcr it captures the picture from my famicom even better than the vcr but still there is no sound just a loud noice
Edit2:
I have been able to play perfectly on both my tv's with a sega mastersystem II again with RF...if this helps
I am back everyone :)

famifan

i faced the same problem on pirate atari2600 console.
i was able only to get clear sound but too noisy b/w picture or clear colored picture with loud noise instead of sound.

i found the triming inductance on the RF circuit, then adjucted it. that's all.

analog RF circuit components are degradating over time and little tweaking can help. The signal frequency is high and very sensitive to any somewhat inductance/capacitance bias.

but i'm not sure that your famicom outputs sound. Could you check it?

some notes about samsung tv, both mine tv's has choiceable sound standard decoding, so try to find out needed one by hit-and-miss method.

tonev

Update i was able to get some sound with buzzing noise on my samsung tv with the console hooked up to the vcr... i have made some progress
I am back everyone :)

famifan

perhaps, you are dealing with misconfigured (or unadjucted) RF circuit on your famicom like in my above post

133MHz

http://famicomworld.com/workshop/articles/famicom-fm/ ;D

Indeed you have to adjust the sound coil on the RF modulator board with a small, non-metallic screwdriver until you get clear audio. :)

tonev

But what of these 3 should be the proper thing to turn from  those shown in the picture below:



I don't think that it is the one behind the shield but who knows


I found that the green one is for video and the other is probably for the audio but it is stuck i cant move it  :( and i am sure it is not the one behind the shield or is it?
I am back everyone :)