Help needed Shuttle power supply

[tckoo1411]

Hi all,
I am new here. currently I am trying to fix my shuttle power supply which went up in smoke the other day. Here's the model and some pictures:
Brand : Shuttle
Model : PC71I0005

Can anyone tell me the rating of the burnt resistor? On top of that, the 5v standby power regulator was burnt and I couldn't identify the part number. Will upload the pictures once I get home. Anyone's help is much appreciated!!! Thanks.

[tckoo1411]

Re: Help needed Shuttle power supply

Hi all,
I am new here. currently I am trying to fix my shuttle power supply which went up in smoke the other day. Here's the model and some pictures:
Brand : Shuttle
Model : PC71I0005

Can anyone tell me the rating of the burnt resistor? On top of that, the 5v standby power regulator was burnt and I couldn't identify the part number. Will upload the pictures once I get home. Anyone's help is much appreciated!!! Thanks..

More picture

[tckoo1411]

Re: Help needed Shuttle power supply

The PC was shutting down when there's a huge spark, after which the house circuit breaker was tripped.

[tckoo1411]

Re: Help needed Shuttle power supply

Any advice? Thanks.

[Quaddro]

Re: Help needed Shuttle power supply

well, fsp units.
I don't know, but i do hate this platform..
for me, it's rather hard to fix, because many components suffer leakage in full load rather than just fail..

But, here is the schematic.
i do hope you'll find the missing component.

[momaka]

Re: Help needed Shuttle power supply

Can you post top and bottom *overall* shots that show the whole PSU (and maybe point where the bad resistor is)? All I can see is that it is on the primary side (I think), possibly the snubber or current sense for APFC or main PS.

[Gildasd]

Re: Help needed Shuttle power supply

I have the same supply, but the layout is different...

One word of caution, the heavy filtering on the primary side can store quite a lot of energy.
You must discharge where the 220/110V enters the board and then the main 450V cap (that is on a 16.5V rail on mine) with a 10k resistor wrapped in electrical tape.

[stj]

Re: Help needed Shuttle power supply

"huge spark" sounds like the mov shorted and exploded - i'v personally seen that happen.

before you do anything else, get a small brush or a vac cleaner or compressed air and clear all that dust & fluff out

[japlytic]

Re: Help needed Shuttle power supply

The IC which is blown is most likely to be a TNY26x series device (for the +5VSB section - a TNY265 handles 11W output and a TNY266 handles 15W output given this unit has active PFC and is of the open frame type and not an external adaptor) with the pins Drain (D), Source (S), Enable/Undervoltage (EN/UV), and Bypass (BP).
Also check capacitance of the 400/450V unit (after carefully discharging) - I've seen a surge damaged power supply which the 400/450V unit had barely any capacitance left in it.