Cougar CMX 700W suddenly Went off

[abdorefky]

Hello,

i have : Cougar CMX 700W
Model : CGR B2-700

the power supply stopped working.

i tried to connect the green wire with the black wire to activate the fan but still nothing ! .

how can i troubleshoot such thing ?

Thank you

[Agent24]

Re: Cougar CMX 700W suddenly Went off

Is the 5vSB rail working?

[CapLeaker]

Re: Cougar CMX 700W suddenly Went off

I'd also be looking for the 5V STBY rail first while the PSU is plugged in. If the STBY rail works, force the PSU on and check the DC voltatge on the main filter capacitor. Be careful, you are connected to mains voltage and if the PFC booster is running, there is 390V DC on that capacitor.
Can you explain as best as you can what happend? Did it just turn off, or was there a bing bang, or is the fuse blown etc?

[Pentium4]

Re: Cougar CMX 700W suddenly Went off

I'd be curious to know if the thing is getting 5VSB too. When you hit the power while shorting PS_ON, does the fan tick for a second? I noticed that the daughterboard between the primary heatsink and main transformer is covered in what looks like conductive glue. Look closely to see if there are any burn marks there.

Black PCBs look cool but make troubleshooting harder since you can't see discoloration very well

Check the startup cap as well which looks to be that small cap by the large high voltage cap.

[abdorefky]

Re: Cougar CMX 700W suddenly Went off

good morning every one and sorry for the late replay.

i have tested all voltages while shorting the PS_ON

the only working one is the 5VSB ( and it doesn't need to short on PS-ON ) it on all time.

all other voltages doesn't work .

should i should more photos for the power supply ?

[abdorefky]

Re: Cougar CMX 700W suddenly Went off

I'd also be looking for the 5V STBY rail first while the PSU is plugged in. If the STBY rail works, force the PSU on and check the DC voltatge on the main filter capacitor. Be careful, you are connected to mains voltage and if the PFC booster is running, there is 390V DC on that capacitor.
Can you explain as best as you can what happend? Did it just turn off, or was there a bing bang, or is the fuse blown etc?

The DC voltage on the main capacitor is 320

about what happened : i tried to turn it on but it didn't !!

[abdorefky]

Re: Cougar CMX 700W suddenly Went off

i have made some Diode testest

D81,D82,D83 = .455
D24 = .345
D10 = .310 ( but on the reverse it keep counting up and stop at 1.1)
D6 = .445

[abdorefky]

Re: Cougar CMX 700W suddenly Went off

Addtional photo.

[Behemot]

Re: Cougar CMX 700W suddenly Went off

Seems like you have some chloroprene glue in the unit, check if it went brown somewhere shorting something and if so, clean it.

Do you have about 3.3 V on the green wire?

[abdorefky]

Re: Cougar CMX 700W suddenly Went off

Seems like you have some chloroprene glue in the unit, check if it went brown somewhere shorting something and if so, clean it.

Do you have about 3.3 V on the green wire?

Hello Behemot,

i don't have the 3.3 V on the green wire

about the brown i have attached those 2 photos the view some brown.
but how to clean it with out damaging the board ?

[Behemot]

Re: Cougar CMX 700W suddenly Went off

Well, badly.

If you don't have PWR On available than no wonder it can not be started. Most likely problem with the secondary supervisor.

[Agent24]

Re: Cougar CMX 700W suddenly Went off

Make sure you measure the green wire without connecting it to ground, ie: without trying to force the PSU on.

That glue is much easier to remove if you heat it, try a hairdryer or heat gun on low temperature. Carefully pull it off with pliers or such. Don't damage the parts under it.

[Behemot]

Re: Cougar CMX 700W suddenly Went off

I can see Silicon Touch Technology logo, which one is there?

[abdorefky]

Re: Cougar CMX 700W suddenly Went off

Make sure you measure the green wire without connecting it to ground, ie: without trying to force the PSU on.

mmmm i did connect the avo between the green and the black .

will the avo force PSU-ON ?

[Drack]

Re: Cougar CMX 700W suddenly Went off

Have you tried it with a car bulb or something that can put some load, some PSU don't like to start with no load.
Check d 10 out of the unit, took every glue that looks brown. The fan ticks or makes something when you short ps on with ground or just dead?
When it went of did it make any wierd sound?
Drack.

[abdorefky]

Re: Cougar CMX 700W suddenly Went off

I can see Silicon Touch Technology logo, which one is there?

Silicon Touch Technology

PS223
P11616A1F

Board by ****** i dunno the logo

06 94V-0

TB-7-2W(L)X-CNT F1.2
2010.10.12 DC0-0103F2B

[Behemot]

Re: Cougar CMX 700W suddenly Went off

So when you keep the PWR On high, do you have 3.3 V or not?

Lightbulbs are bad idea unless combined with NTC in series. Startup current of lightbulb is hundreds of amperes, that can kill rectifier right away.

[abdorefky]

Re: Cougar CMX 700W suddenly Went off

So when you keep the PWR On high, do you have 3.3 V or not?

Alright i have checked again, how ever i am sure that all gives 0 voltages except the 5VSB

something new happened now, maybe the cleaning did something ?

the Green Wire voltage = 2.973 V

when i try to force power on while measuring the green wire voltage it jumps to 0 voltage

[Behemot]

Re: Cougar CMX 700W suddenly Went off

that's normal condition, by pulling the signal down the supervisor starts the main power supply

[abdorefky]

Re: Cougar CMX 700W suddenly Went off

that's normal condition, by pulling the signal down the supervisor starts the main power supply

Great, what should i test now