PS1 5v fan installation?

I am trying to hook up an old 3 wire 5v dreamcast fan in my SCPH-5552 model PS1.
I tried to come straight off the power LED points but to no avail.

Any guidance on this would be awesome.

 

The main PSU board in the PSX doesn't produce 5V - just 8V and 3.5V. There is a 5V line, but it's subregulated on the main board from the 8V.

I think the SCPH-5552 has a PU-18 board in it - if so, then the regulator is on the front of the board about 1 inch right of the socket the controller board plugs into. It should have "78M05" on it and the designation "IC601" below it - the pin on the right (just above "IC 601") is the +5V output -the ground is the tab at the top of the device.

 

Thank you very much. It is indeed a PU-18 board, I'll have a look now and let you know how I get on

 

Worked for a few second then went off. I think I blew the board somewhow. The PSU light turns on but as soon as it's connected to the main board it goes off and starts buzzing.

Crap happens I guess lol.

 

But why do you want to install fan to your PS1, just to make it more noisy?
PS1 isn't hot console, it doesn't need any active cooling.

 

Due to the the older models having the PSU on the inside, they generate enough heat to cause problems with the laser assembly overtime. It wasn't really needed since I can just throw in another drive, but I enjoy experimenting with them when I'm bored.

 

Hmmm, never herd of that before. All my PS1's have never had an issue...


Why don't you just use a 12V fan and attach it to the 8V line?

 

I only had an old dreamcast fan to hand.

 

I remember reading about it as a kid back in the day. The early PSXs (mainly the SCPH-1001s) had a laser assembly almost entirely made of plastic and the heat buildup would warp the rail guides to the point where the laser sled would be uneven. And as I also remember, the common cheap fix for it was to place the system upside down (!) to counteract the unevenness.

 

I know now lol. I won't be making the same mistake again. Don't need a telling off from the boss :sorrow:

 

BUy a multimeter.

 

It should have worked - the 78M05 is a 500mA regulator, and only has a few fairly low power devices running from it. In fact, since I have a PU-18 PSX and a fan out of a Dreamcast here, I can test it...

Works for me...

 

THAT would have worked.

This, however: "I tried to come straight off the power LED points but to no avail."

Not so much.

 

He tried the LED first and said it didnt work. It was only after trimesh's instructions it died.

So unless he completely ignored trimesh and did something else - he must have done something wrong, as it clearly works.

 

Yeah, I have to admit that I didn't actually test it when I wrote that first post - it just looked reasonable. It would be interesting to find out what actually went wrong, though.

 

There isnt much reason for you to have needed to test it. Dont really see any reason why it wouldnt work (and it clearly does, from your own picture!). Im guessing he connected something wrong... somewhere.

 

I did exactly like in the picture above. I'm using a new gas iron though and I was having trouble getting the solder to hold. I probably put too much heat on the point with the constant fucking about.
My soldering isn't exactly amazing but I had my mod chip on the board within ten minutes using the old wired iron (neatly done too). Could of been the crappy gas iron or the new cheap solder I purchased for £1 off ebay.

 

Kev's comment about connecting to a source that delivers milliwatts, was referring to trying to run the fan off the power LED's current-limited source, as mentioned in the OP. That would never work.

 

Kev's comments were also ignoring the fact the led thing was tested, known not to work by the op and had already been told the way he should do it.

Then you said "that would have worked" like he hadnt already tried that, failed and was already asking why.