/vr/ - Retro Games

[Anonymous No.1032578]

I recently bought a famicom which had a blown fuse.

I replaced the fuse as well as the voltage regulator and filtering capacitor.

It works now, but there is a loud hum coming through the speakers, i read about the microphone on controller 2 being an issue but after disconnecting it the hum is still there.

Any ideas?

[Anonymous No.1032590]

hrmm, get a pair of speakers and hook them up to a pair of needles (like the kind you use to test voltage, or even sowing needles, it doesn't matter). Next, open the famicom up and find where the sound signal originates from, try and grab the signal with the needles and listen for any humming, be really careful not to arc anything or short anything out. Test prior to the terminating rca/coaxial port, it might be something with high voltage is spilling onto the sound signal.

[hoshikawa No.1032595]

>>1032578
what power supply are you using?

[Anonymous No.1032609]

>>1032578
This is a shot in the dark but I can hear a hum on my PC's headphones when it's connected to a poorly grounded outlet.
Check if everything that should be grounded is actually grounded.

[Anonymous No.1032615]

>>1032595
Sega master system 2.

[hoshikawa No.1032617]

>>1032615
I have good luck with a model 1 megadrive power supply.

[Anonymous No.1032621]

Check to make sure you didnt bridge any connections with solder. It sounds like a poor ground somewhere.