Snes SNS-002 adaptor resistor

[kugotsumin]

We have here a super nintendo adapter that doesn't power on the console. We were just wondering about this resistor **broken link removed**. the middle band appears white in the picture but is grey. We suspect it is 6800kΩ, if so where would we find one to buy on the internet? but then we have this http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_691770_-1, it says "6.8M", what's the story there? And also we don't know if the resistor is even dead because my multimeter only goes up to 2000kΩ, would it show anything on that setting? Tips appreciated, thanks.

 

[FoxyRick]

6.8MΩ = 6800kΩ, you have read the value correctly and the silver means 10% tolerance.

Where does the black wire go that is on the PCB next to the resistor?

Can you show a picture from the top of the PCB, showing all components, and the underside?

I doubt that the resistor is your problem.

Have you checked the AC output of the transformer, where it is soldered to the PCB? If there is a voltage, then check the DC voltage across the capacitor.

 

[kugotsumin]

**broken link removed** - bottom of pcb with test results
**broken link removed** - top of pcb
**broken link removed** - another shot of black wire

 

[markdem]

Hmm, two questions,

1. Looks like you are getting 14Vdc out so this part looks like it is working OK. If the SNES is not powering on, I would think the problems is elsewhere.
2. Why are you trying to fix it anyway? The SNES has a standard 7805 to convert the input voltage to 5vDC so you can feed it with ~8-12vDC with at least 1amp. Just get a power from a old phone or something and solder the SNES connector to it.
Just make sure not to exceed 12vDC or the regulator will get to hot.

Have Fun.

- - - Updated - - -

Hmm, two questions,

1. Looks like you are getting 14Vdc out so this part looks like it is working OK. If the SNES is not powering on, I would think the problems is elsewhere. Have you opened the NES and checked voltages in there?
2. Why are you trying to fix it anyway? The SNES has a standard 7805 to convert the input voltage to 5vDC so you can feed it with ~8-12vDC with at least 1amp. Just get a power from a old phone or something and solder the SNES connector to it.
Just make sure not to exceed 12vDC or the regulator will get to hot.

Have Fun.

 

[FoxyRick]

As markdem said, it looks like the power supply is working fine. The 14V DC will drop a little when the the SNES is powered on. The resistor is nothing to do with the problem, neither is the power supply by the looks of it.

That said, just check that you can measure the same DC voltage at the end of the plug that goes into the SNES, just to make sure the wire is not broken.

If that measures good, then you'll have to start looking at the SNES itself for the fault. Plug in the power supply and start checking the voltage from the power socket in the SNES, then the regulator... if it looks good that far then the problem is likely more complex.

 

[kugotsumin]

how exactly do we check the power from the end of the wire? I'm not exactly sure. MM probes go where? we tried that and we were getting nothing.

 

[FoxyRick]

Does the plug look like a metal cylinder, with a plastic tip and a hole in the end?

If so, one connector is the outer metal cylinder, the other is another metal cylinder inside the hole. So, one probe to the outer, the other probe pushed inside the hole. If the hole is too narrow for your probe, then you'll have to push a piece of wire inside to touch the inner conductor and touch the probe to that.

If it doesn't look like that, describe it to me (I have never used a SNES)

Breaks in the wire are common, usually just where the wire exits the power adapter or enters the plug at the end of the wire.

 

[kugotsumin]

yeah it's a metal cylinder, with a little pin poking out inside, like a coax cable end. so one probe would touch the pin, and one the outside. if this is the case then yeah, no read. with it plugged in, obviously, just in case you might have wondered about that, lol.

 

[FoxyRick]

Ahh, one of those.

Sounds like you have a break in the wire then, since the voltage is present on the board, but not at the plug. You'll need to work out (google) the correct size of plug (there are many sizes, inside and outside diameter) and solder in a new connector wire and plug.

 

[markdem]

Hmm, something has confused me here. I just have had a look at my SNES and the male (center pin sticking out) part is on the SNES itself, not on the plug. The plug is female (Hole in the middle). I know Nintendo loved to change the design depending where you bought it so you could have the opposite.

Just to make sure, you plugged the transformer in to the wall and put the multimeter probes onto the connector that would normally go into the SNES remembering to change the multimeter to DC MODE?

Have Fun

 

[kugotsumin]

yes that's exactly what i did. also i had another one i bought on ebay arrive recently, it tested out fine, 14v dc coming from the tip unlike the other. so it must be a break in the wire somewhere. As for having a diff version... what country are you in? check version of adaptor/snes? (my snes = SNS001, adaptor SNS002). **broken link removed**

 

[markdem]

I am in Australia, and the connector I have is different then that. Don't stress about it, Nintendo loved to change things around. As to what version I have I would need to check.

So does it work when you put the new adapter in?

 

[kugotsumin]

Yes it works fine. You should have seen the third party adaptor i was using before it, it took forever for the game to show up on the screen, and when it did it had distorted sound and two lines coming down the screen. My friend and I played the entire secret of mana and 5 hours of seiken densetsu 3 with it like this. The cap was BULGING from its bottom. I'm very happy i didn't fry anything in either of my super nintendos using that damaged adaptor so long.