Changing PS1 power supply board from 110v to 220v

Hello,

I have a PS1 power supply board that is 110v. I would like to modify it to work on 220v power without a step down converter.

I remember in the past I switched the big capacitor and it worked. I can't seem to remember the rating of the capacitor.

The one currently on the board is 150uf and 200v.

Can I replace this with a 150uf and 400v? Or maybe a 33uf and 400v because it's a better fitment.

Appreciate your assistance.

 

just buy a 240v psu

 

There is a schematic of the SCPH-1002 PSU (which is 240v) available on the internets. You could compare to that?

 

I can't find the schematics for the 1002 :'(

The ones I found I couldn't read.

Would you happen to have a link for the one you're talking about?

 

I found this.



Any idea what the rating is on the capacitor? I can't figure it out. (it's probably right in front of my face )

 

Is it 400v 47uf?

 

Yeah, it's 400V, 47uF - but the transformer is also different between the 120V and 220V boards - so if possible use a variable transformer and turn the voltage up slowly.

 

Is that a must or can we do without it?

Would installing a 400V, 47uF cap be enough to run the console without a step down? As far as I know when the 200V, 150uF cap is fed 220V it's the only part that gets damaged.

 

Absolutely not! It's way better, secure and fast buy directly a 220v PSU

 

I have a model SCPH-1000. It would be expensive buying one and very difficult to find. I also have 4 consoles that I would need this for.

Chinese PSUs won't last a day. Terrible quality.

 

But you can't simply change the voltage input rating of a psu changing a capacitor, you will need swap a series of components, some of that will be not easy to find (like the transformer)...
IMHO it's better if you build or adapt another psu. Here's an "exaggerated" example.

 

Without the design data on the original transformer, it's the only way to be sure. The basic issue is that the filter cap on the original PSU will have charged up to sqrt(2)*100V = about 141V - running it on 220V, it will charge up to sqrt(2)*220V = about 311V. On the OEM 220V supply, they would have compensated for this by increasing the inductance of the primary winding (basically, adding more turns to the coil).

If you use the original transformer with the higher B+ voltage, it will take much higher current that it would have in the original 100VAC application. This would result in a higher output voltage, but since it's a regulated PSU the controller will try and reduce the duty cycle to keep the output in spec. Depending on the design of the PSU, this may work without problems, just with the switching transistor getting hotter from the increased current.

There are, however, two situations you have to watch for - one is where the minimum duty cycle the regulator can command is still excessive for the load conditions, and this will result in either the PSU shutting down or excessive output voltage. The second is that the core of the transformer may saturate due to the increased current, which results in it taking very large amounts of current at the end of each switching cycle - this can lead to the situation where it's all apparently working OK, but after a fairly short period of operation the switching transistor will fail due to the repeated transient overloads.

Normally, you would run the whole thing through a variable transformer and an isolating transformer and scoping the voltage across the current sense resistor (the one in series with the emitter of the switching transistor) while slowly increasing the line voltage and watching for non-linear behavior.

 

You can use any PSU, you just have to make/modify the cable that links between the PSU and the main board.

 

http://www.ebay.it/itm/PLAYSTATION-...782915?hash=item3ac4ad1e03:g:L6oAAOSwOtBXTK67
Here go....an original 7 PIN PSU for your SCPH-1000 !

 

I have 2 power supplies for the 1002