Fujitsu Siemens Myrica VQ40-2 PSU bad

[PowerAmpFreak]

Hello
it seems this Myrica has a bad powersupply.
Only STBY +5V is alive and does not come on when jumping PS_ON.

Advice? Schematics?

[newtothis]

Re: Fujitsu Siemens Myrica VQ40-2 PSU bad

P/N of PSU?

[PowerAmpFreak]

Re: Fujitsu Siemens Myrica VQ40-2 PSU bad

Pa-2005b

[PowerAmpFreak]

Re: Fujitsu Siemens Myrica VQ40-2 PSU bad

I noticed the black epoxy incapsulated PWM module gets very varm directly after start up. So this will be a module swap if I can found one.

[PowerAmpFreak]

Re: Fujitsu Siemens Myrica VQ40-2 PSU bad

Hello everyone.
I am interested to buy this powersupply if you've got it.
I only need the black incapsulated module called "CMP-PWM" , driver for main DC/DC.

Let me know if you have something to sell!

Part-number for complete PSU: AP-2005B

[ReeceyBurger123]

Re: Fujitsu Siemens Myrica VQ40-2 PSU bad

Are you sure its the PWM, have you checked the caps on esr I noticed that there are green samxon gf caps which are known to fail with out bulging ?

[PowerAmpFreak]

Re: Fujitsu Siemens Myrica VQ40-2 PSU bad

The CMP-PWM module gets warm (more than I would expect) directly after power on. It also drop too much voltage across the 47ohm series resistor feeding it.
I can't think of anything else than a CMP-PWM failure really.

[PowerAmpFreak]

Re: Fujitsu Siemens Myrica VQ40-2 PSU bad

Anyone having this PSU to sell?
Give me a PM please!

P/N: AP-2005B

[krivoy61007]

Re: Fujitsu Siemens Myrica VQ40-2 PSU bad

хотел бы найти схему этого блока питания...