Fixing a not-working 750W power supply.

[eem2am]

Hello,

I have just been handed a Toughpower 750W power supply (part number W0116 by Thermaltake).

Power supply:-
**broken link removed**

Power supply manual:-
2shared - download W0116_Toughpower750W.pdf

I am told it does not work and that i should fix it.

Do you know if there's any way of finding a schematic for this?

I believe its a computer power supply......so am i right in saying that powering it up on its own will not allow it to work, since it needs microprocessor signals from the computer to coordinate with it and tell it to start up?

 

[malik_zohaib]

a nice tutorial about ATX Power Supply Repair
PC Power Supply Failure Diagnostics - Computer ATX Power Supply Troubleshooting and Repair

 

[FvM]

since it needs microprocessor signals from the computer to coordinate with it and tell it to start up?

Check an ATX connector description from the internet. You simply have to short PS_ON# to gnd.

5VSB is present also without activating PS_ON#.

 

[eem2am]

thankyou,

I will short those pins and switch it on.

also i am reading from Malik's document which he kindly posted...and it says not to start it up without it being loaded.
do i have to load it first?

I have the manual and it gives minimum loads

 

[xaccto]

have tested/played with many a PC power supply,
did the short PS_ON# to gnd.

without a load,

they all handled it ok, the output voltages might be just a tad higher, thats all.

 

[Delphianrex]

to test your psu, you need to short the Green wire which is PS_ON (it must have TTL 5V by default) to a black wire.then after a period almost about 200-500 ms, a logical high voltage must appear on the Grey wire which is the PS-Good signal. if PS-Good signal was ok either, you can be sure about the PSU but for a 100 percent confidence about your power you need to apply a load on it.