First post, by nuno14272
Hi there,
I have a olivetti pcs286 and i'm having problems with the power supply. The fuse is not blowing, but the output voltage is way off.
I have changed the X2 filters, the Y2 supressors, the main fast-switching power transistor, all the electrolitic capacitors, the bulk capacitor.. and..
when i turn the power supply on (not conected to the board yet), the output voltage is waayyyyyy off... goes from +3v to +7v (in the +5v line for example)... in the +12v is the same. going all the way up to +15 volts and down to +7v...
I'm out of ideas..
THIS IS NOT THE PICTURES FROM MY POWER SUPPLY BUT it's the same as mine - apart that i have changed all the above described
No matter the changes i have maid, the output voltage is going up and down like crazy
I'm to afraid of connecting the power supply to the board, because i dont want the board to fry !!!
Any idea of whats going on ?
And if i dont resolve this, can someone tell me what is the power conector pinout ??? because with this oscillations i don't have 100% shure what is suposed to be the correct output.
thanks
1| 386DX40
2| P200mmx, Voodoo 1
3| PIII-450, Voodoo 3 3000