Super Famicom - Waves on screen

[s_d]

When I got SFC, turned it on and seen these waves, I though it was because power adapter wasn't original. Later I got this one (HVC-002) and...the same waves. What's the problem? I'll appreciate any help.

Photo:


Video:
http://www.youtube.com/watch?v=CLrFi...ature=youtu.be

[Lum]

Are you in a 240v country?

The original power adapter is designed for Japan/USA, needing about 100-110v.

[l_oliveira]

Just the wave, no humming on the audio ? :shrug:

Could be bad capacitor on either the Super Famicom or the adapter.

[s_d]

Are you in a 240v country?

220v, of course I'm using step-down converter.

Just the wave, no humming on the audio ?

Could be bad capacitor on either the Super Famicom or the adapter.

No humming. I'll test adapter with another system. Seller who sold me SFC (console only) said what it works fine before he sent it (but maybe he's just rip-offer).

[s_d]

Tested adapter, it works fine. Capacitor is the only guess?

[l_oliveira]

Tested adapter, it works fine. Capacitor is the only guess?

Unfortunately, the ones inside the SFC unit itself. :shrug:

[Oldgamingfart]

Try feed it 12v from one of those multi-voltage adapters you find in pound shops/ hardware stores and the like. Try finding one with a rating over 900mA, and make sure you observe the correct polarity.

[pc_91]

i'm with the adapter problem, try with a generic one, snes had rectifier on the inside so polarity is not a problem, but of course check it first, if on the bottom of the machine says "ac 9 volt" you're safe , if says "dc 9 volts" check polarity

[l_oliveira]

i'm with the adapter problem, try with a generic one, snes had rectifier on the inside so polarity is not a problem, but of course check it first, if on the bottom of the machine says "ac 9 volt" you're safe , if says "dc 9 volts" check polarity

Later I got this one (HVC-002) and...the same waves.

HVC-002 is the original Famicom power supply, which happens to be the very same that originally comes with and is recommended to be used with the Super Famicom. :nod:

So no, it cannot be an AC power supply what he's using.

[pc_91]

my bad. the sns-02 adapter is DC http://www.pricedbelowmarket.com/ass...395_4_600w.jpg

same as HVC-002
http://img.auctiva.com/imgdata/9/9/3...3692907_tp.jpg

i was confused with the NES power supply which is AC 10v (nes-002)

still, try a generic adaptor any voltage between 7.5v and 18v will run it since is based on a 7805 internally, a sega adapter will do the job, check polarity first

[Lum]

That's right.

US SNES won't even fit.
US NES, PAL NES, or PAL SNES, could fry the system with AC.

[pc_91]

that's why i was confused, mi first snes was a pal one, and had the rectifier on the inside, if you put AC on a SFC or a ntsc snes you will blow the fuse and/or blow your machine, be aware of!! :P

[l_oliveira]

That's right.

US SNES won't even fit.
US NES, PAL NES, or PAL SNES, could fry the system with AC.

No, it wont fry a Super Famicom but most certainly would fry a Famicom.

Why ? The Super Famicom has an protection diode that prevents current from flowing in case the polarity is reversed. :thumbsup:

[s_d]

Try feed it 12v from one of those multi-voltage adapters you find in pound shops/ hardware stores and the like. Try finding one with a rating over 900mA, and make sure you observe the correct polarity.

Why? Can you explain? HVC-002 is made to feed all needs of SFC and I see no point to buy multi-voltage adapter and try it just as an option, they're not so cheap.

[Lum]

Did you check your step down converter's voltage output?

For me HVC-002 is apparently safe, but I'm in USA and don't use or even own a converter.

[l_oliveira]

Why? Can you explain? HVC-002 is made to feed all needs of SFC and I see no point to buy multi-voltage adapter and try it just as an option, they're not so cheap.

The point is that your HVC-002 is suspect of being faulty. :thumbsup:

You can use a SEGA Genesis or Mega Drive AC adapter for testing as well if you happen to own one. :thumbsup:

[Oldgamingfart]

Yes much better off with a 'native' adapter imo. Using Japanese 100v adapters on unregulated step-down transformers is not recommended. The adapters get too hot and fail prematurely, and there also a risk of fire if the thermal fuse doesn't blow.

Likewise bending the pins and forcing them into 125v US type outlets will lead to the same problems.

[s_d]

Lum

It's 110v AC. With all other systems they work fine.

l_oliveira

How I said, I tested HVC-002 on another system (some 60hz Famiclone).
In the first post I mentioned about unoriginal adapter, it was the Genesis Model 1 one.

Oldgamingfart

Depends on quality. Some converters are good for 16-bit and less systems, some better for all other. That's why I have two of them.

I'll try variant with regulated adapter when I'll find it.

[s_d]

I bought multi-voltage adapter (Robiton PC1000, 1000ma) and tested it. In the beginning it worked correct (I'm not sure exactly) on 12v but after some time (about 1 minute) I saw these waves again, BUT without problem with color, just waves. After some experimentation for some reasons console has started to working without color problem only on 9v and on 12v it indicates all problems with native adapter and step-down converter (i.e. waves + color problem).

[Oldgamingfart]

It's possible the caps inside the SFC are starting to go bad. This might explain why it's become sensitive to the input voltage etc.
It will probably improve with regular use, although blanket replacement of all the electrolytic capacitors inside your SFC is something you may want to consider (for long-term reliability).