Skyhawk CTX-250WCE

[Rainbow]

Got a PC for repair. The PSU was dead (I've seen one Skyhawk dead last week - maybe the same model - I'll see at work). Resistors burnt, capacitors bulged. Luckily, no hardware was damaged. Bad caps are "GL" brand - three 2200uF/10V and one 47uF/50V! There is also one G-Luxon (looks OK) and some Rubysuns - looks like another fake Rubycons... (they also look OK).
And note the DEER text on the PCB...

[Rainbow]

Re: Skyhawk CTX-250WCE

The other dead Skyhawk is CTX-200WCE. The PCB is the same - DEER - but different caps (not bulged). This one killed Abit BE6-II (which has some caps bulging).

[Rainbow]

Re: Skyhawk CTX-250WCE

Autopsy revealed that the primary cause is the same as with EuroCase PSUs. Capacitor C7 in AUX power supply (22uF/50V) is crap (marked "GL") and dries out (measured only 1.3uF). The voltage slowly increases until it burns out. Bad caps together with bad design makes these PSUs real crap.

[Rainbow]

Re: Skyhawk CTX-250WCE

I've fixed the 200W one - it has better caps. The bigger ones are CapXon and seem to be fine. Replaced bad C7 with 33uF/63V@105 deg, 7805 regulator for +5VSB and two nearby 100uF/16V caps (one was exploded) - and it works fine.
The 250W one had almost all caps bad (GL crap), one of the Rubysuns was completely open but looked normal - nothing to fix here...

[marisanfer]

Re: Skyhawk CTX-250WCE

My power supply CTX-250WCE is death, I know that is because of the resistor R2 which is closer to the disipator. My problem is that the resistor burn and I don`t know the color of the strip, then I don`t know the value of the resistor, jeje
Please if somebody know the value....Maybe this can save my power supply.