Power supply Termaltake Smart Se 630w any voltage in output

[labello]

Hello everybody I try to fix thi power supply, I have voltage in bridge rectifier, and also in the large capacitor , so I thought the problem was in the pfc but then I found all mosfet ok(tested out of the circuit so I just moved on in the low voltage and here I found a short of one of the diode rectifier. I'll replaced it already but it's completely dead, I mean any stanby voltage and the other voltage is not present. I don't have oscilloscope to understand if the chip work how can I test it? Thank you for the help 🙏

[stj]

Re: Power supply Termaltake Smart Se 630w any voltage in output

pictures of the standby supply would help

[CapLeaker]

Re: Power supply Termaltake Smart Se 630w any voltage in output

You need to fix the stby voltage first. Post some high resolution, straight shot pictures and upload them using the attachment function.

[labello]

Re: Power supply Termaltake Smart Se 630w any voltage in output

Here's the picture guys . I hope the quality is good

[stj]

Re: Power supply Termaltake Smart Se 630w any voltage in output

whats the part number on the 7pin chip in the center?

[labello]

Re: Power supply Termaltake Smart Se 630w any voltage in output

whats the part number on the 7pin chip in the center?

Hello here's the part number. But also as you can see I found 5v only 5v , about the rest of voltage nothing . Thank you

[CapLeaker]

Re: Power supply Termaltake Smart Se 630w any voltage in output

What does it have for an supervisor IC? It’s on the secondary.

[stj]

Re: Power supply Termaltake Smart Se 630w any voltage in output

so standby does work?

[labello]

Re: Power supply Termaltake Smart Se 630w any voltage in output

What does it have for an supervisor IC? It's on the secondary.

Hi thank you for your answer, if you mean those I think we found the problem.. As you can see from the picture one of these does give any voltage

[CapLeaker]

Re: Power supply Termaltake Smart Se 630w any voltage in output

That’s why I am asking about the supervisor. One of these 3 opto isolators you found is coming from the supervisor IC. If the supervisor detects something wrong, it will simply turn the primary of the psu off.
Figure out what supervisor ic it’s got and measure the voltage on all the pins.
You should see it mounted on the secondary of the PSU where all the cables (red, black, yellow etc) are.

[labello]

Re: Power supply Termaltake Smart Se 630w any voltage in output

That's why I am asking about the supervisor. One of these 3 opto isolators you found is coming from the supervisor IC. If the supervisor detects something wrong, it will simply turn the primary of the psu off.
Figure out what supervisor ic it's got and measure the voltage on all the pins.
You should see it mounted on the secondary of the PSU where all the cables (red, black, yellow etc) are.

If it is this i got it

[labello]

Re: Power supply Termaltake Smart Se 630w any voltage in output

Hi guys, I followed the circuit of the' bad opto isolator' one leg goes through one little capacitor and the other one go into a kind of transistor (diode junction) then there are some smd resistance diode capacitor. I tested out the circuit the transistor and capacitor them are pretty good. So it's the opto isolator broken or the ic supervisor..? Thank you all for the answer

[stj]

Re: Power supply Termaltake Smart Se 630w any voltage in output

try swaping the isolator for one of the others and see if the fault changes

[CapLeaker]

Re: Power supply Termaltake Smart Se 630w any voltage in output

Fault protection latch Pin 3 on the supervisor is high, so it detected something and shut the PSU down. So one of the opto isolators has to have on the secondary side on both legs 5V.
I do know that the supervisor will also fire if the main filter caps are bad. Guess how I found out. Lol

Now, you got to figure out why this supervisor is shutting down the primary side of the PSU. The supervisor also has a protector detector function input pin 4. If that is high, guess what? Yepper, another external shutdown reason… Happy hunting!

[labello]

Re: Power supply Termaltake Smart Se 630w any voltage in output

try swaping the isolator for one of the others and see if the fault changes

Nothing changed...

[labello]

Re: Power supply Termaltake Smart Se 630w any voltage in output

Fault protection latch Pin 3 on the supervisor is high, so it detected something and shut the PSU down. So one of the opto isolators has to have on the secondary side on both legs 5V.
I do know that the supervisor will also fire if the main filter caps are bad. Guess how I found out. Lol

Now, you got to figure out why this supervisor is shutting down the primary side of the PSU. The supervisor also has a protector detector function input pin 4. If that is high, guess what? Yepper, another external shutdown reason… Happy hunting!

Hi thanks for your answer, in all of tree opto isolator in entry side I have 21v, the main capacitor I also tested out of the circuit with capacitor meater and esr meater. Then I'm not expert to repering power supply, I tried to fix and in the same time understanding and learning I hope. So we have strange thing in this power supply...my goodness

[CapLeaker]

Re: Power supply Termaltake Smart Se 630w any voltage in output

Look at the spec sheet of the supervisor IC. When pin 3 is high (something like 5V and it goes to one of the opto’s) it shuts down the PWM in the primary.

Make yourself a jig called “dim bulb tester”. It’s basically a 100 - 150W incandescent lightbulb wired in series with the power mains of the PSU. If something shorts, the bulb will light up bright and save it from blowing up.

So if you force the power supply on by plugging it in, then jumping the green wire to the black wires, nothing happens?

[labello]

Re: Power supply Termaltake Smart Se 630w any voltage in output

Look at the spec sheet of the supervisor IC. When pin 3 is high (something like 5V and it goes to one of the opto's) it shuts down the PWM in the primary.

Make yourself a jig called “dim bulb tester”. It's basically a 100 - 150W incandescent lightbulb wired in series with the power mains of the PSU. If something shorts, the bulb will light up bright and save it from blowing up.

So if you force the power supply on by plugging it in, then jumping the green wire to the black wires, nothing happens?

Hi the ligth bulb keep flashing, I think is normal because PFC is active, I short was on the secondary side (a diod rectify. The second one that I paint in the picture. I change it but it doesn't turn on , I also checked the some of pnp transistor way around they are okay,so there's must be another problem to turning off the power supply. The question is what's going on now?🤔 Thank you

[CapLeaker]

Re: Power supply Termaltake Smart Se 630w any voltage in output

What wattage bulb did you use? Did any of the voltage rails come up for a brief period? You may have to put the DMM in a fixed range.

[momaka]

Re: Power supply Termaltake Smart Se 630w any voltage in output

If you have a transistor tester or ESR meter, pull out the big electrolytic cap on the primary and measure it. Also pull all of the small caps on the primary side and measure them. Post what results you get for these. If you don't have a way to measure ESR on caps, best bet is to replace all of the small caps with high-quality Japanese low ESR ones.

For the dim bulb tester, go straight to a 300-500 Watt heating element or incandescent / halogen lamp. Often times, 100-150W is not enough for APFC circuits, IME. Also put a small load on the PSU's 12V and 5V rail (12V halogen lamps rated 10-20W should be OK... or a bunch of 10-Ohm 3W resistors on the 5V rail and one or two 100-Ohm 2W resistors on the 12V rail), just to make sure the PSU is not turning on due to not having a sufficient load (some ATX PSUs are like that.) You might have to ditch the dim bulb trick for this test, as any load on the output of the PSU would ask for an even larger heating element or light bulb in order for the APFC to work.