alimentatore LITE-ON PA-1181-3HA

[ut-norm]

Hi, I have a Lite-On power supply mod.PA-1181-3HA that I would like to turn on to test it but I don't know the procedure. I attach the photo of the connectors.
The small connector connected to the circuit has 5 wires: 2 black connected to ground, the others, purple, gray and green.
Thanks for your help

[momaka]

Re: alimentatore LITE-ON

If the color coding of the wires follows "standard" ATX PSU color coding, then it should be as follows:
PURPLE: 5VSB
GREEN: PS-ON
GRAY: PG (power good / power OK)

To turn ON PSU manually, short green wire to ground.
If that doesn't work, measure voltage on purple, green, and gray pins with respect to ground and report back what you got here.

[ut-norm]

Re: alimentatore LITE-ON

I short-circuited the green pin to ground but nothing happens. There is no voltage on the connector pins. After opening it (I attach a photo) I found no voltage in the secondary area. The only voltage is 330 V. it is on the primary cond. of 120 mf 400 v. I did a summary check of the mosfets which seem good. On the primary there is an LTA1605B chip for which I have not found the datasheet. On the secondary there is a vertical board mounted with a SY 1202 chip for which I have not found the datasheet and two Lm 358. In no part of the circuit, both above and below, are there any burning or heating of the components.

[Parafin]

When PSU not connected to PC:
Yellow - 12V is always on.
Green probably PS_ON- 3V
GRAY probably PG - 8.0-8.5V
PURPLE probably power factor correction signal 0V

When PSU connected to PC:
Yellow - 12V is always on.
Green probably PS_ON- 3V
GRAY probably PG - 1.9V
PURPLE probably power factor correction signal 0.1V

After pushing start button:
Yellow - 12V is always on.
Green probably PS_ON- 0V
GRAY probably PG - 1.9V
PURPLE probably power factor correction signal 0.8-0.9V