Sanyo Isolation/Step-Down Replacement

larrylemming

Member
Joined
Mar 10, 2011
Messages
246
Reaction score
3
Location
Minnesota
I just got a Nintendo Vs. Dualsystem with no power supply parts... it has two Sanyo monitors. I believe I need an isolation/step-down transformer since I've read that these monitors run on 100V.

Instead of a direct replacement, is there any reason something like this wouldn't work?
 
That looks like it is only a step-down transformer. You would need an isolation transformer as well.
 
It does provide some minor isolation but I wouldn't trust it for long term use.


Why don't you post a wanted ad for a Nintendo power brick? Another option that I have used is the isolation/step down transformer used in Sega cocktail machines. The Nintendo power brick will be nicer since it will have receptacles for you to plug the monitors directly into but you can figure out a way to mount an Edison plug if you use the Sega.
 
I might ultimately do that, but for the moment, I'm trying to use new parts as much as possible.

I feel like I have a lot of questions about this. I'll just go with this:
1. Can I run multiple monitors off of the same iso, or do I need an iso for each?
2. Do I still need an iso if I'm using a switching power supply for the rest of the game?
 
I might ultimately do that, but for the moment, I'm trying to use new parts as much as possible.

I feel like I have a lot of questions about this. I'll just go with this:
1. Can I run multiple monitors off of the same iso, or do I need an iso for each?
2. Do I still need an iso if I'm using a switching power supply for the rest of the game?


Using the wrong new component will destroy your stuff much faster than using known good old components. Basicly monitors are stupid, they will consume as much power as you give them and this can cause them to burn up. An isolation transformer protects the monitor by limiting the amperage available to a level that will not destroy anything.

1. Multiple monitors can run off of one Iso.

2. A switching power supply has no bearing on the need for an iso. If you are using a monitor that needs an iso then you need to install an iso. The switching power supply powers the board and the rest of the logic components not the monitor.
 
I might ultimately do that, but for the moment, I'm trying to use new parts as much as possible.

I feel like I have a lot of questions about this. I'll just go with this:
1. Can I run multiple monitors off of the same iso, or do I need an iso for each?
2. Do I still need an iso if I'm using a switching power supply for the rest of the game?

1. Maybe.....it'll depending on how many amps your monitors are pulling and how many amps your isolation transformer is rated at. I'll add this......most isolation transformers are rated at barely above enough amps for one monitor. I'm sure, somewhere out there, big beefy ones exist....but I've never seen them.

2. YES! The isolation transformer is for the monitor, and only the monitor (see above). Your power supply, generally, supplies low DC voltages (5VDC, 12VDC, etc.). Your monitor runs on 120 volts isolated AC. Your switching power supply has nothing to do with the monitor......kinda like, the isolation transformer has nothing to do with the power supply or the motherboard (generally speaking).

Edward

EDIT: beat to the punch!
 
Last edited:
Basicly monitors are stupid, they will consume as much power as you give them and this can cause them to burn up. An isolation transformer protects the monitor by limiting the amperage available to a level that will not destroy anything.
A monitor (or any other device for that matter) does not draw an unlimited amount of current unless it is shorted. An isolation transformer does not limit current.
 
For those who are interested: I did manage to find a new replacement part.

Hammond 169C

The downfall is that they are only rated at 100VA (Sanyo monitors are rated at 75W) so you will need one per monitor. There is a higher model, the 169E, that can supply 250VA which would be enough for two monitors, but at a higher price. Personally, I would take the safe route and get one per monitor to isolate the monitors from each other as well as from the mains voltage.
 
Back
Top Bottom