Zyxel gs 1100-16 power supply is dead

[badele]

Hi there
A friend of mine gave me this device because it wasn't working anymore.
Its a 16 port switch with an integrated power supply board.
I checked the output and it shows 0V. Caps look in good shape. So i wanted to ask what could be the most probable component to have failed in here.
Here you have some pictures of the power supply board.
Output are the 4 pins at the bottom they are shorted in couples GG ++

[budm]

Re: Zyxel gs 1100-16 power supply is dead

Check the main fuse, the startup/running cap capacitance and ESR (if in doubt, just replace it), the cold side rectifier.
BTW, there is 6-pin SMD SMPS IC which will be difficult to indentify.

[badele]

Re: Zyxel gs 1100-16 power supply is dead

ok thanks for the suggestions.
Will check them when i get home tomorrow and will let you know.

[stj]

Re: Zyxel gs 1100-16 power supply is dead

what's the specs of c4?

[Pentium4]

Re: Zyxel gs 1100-16 power supply is dead

Is voltage getting through to the input cap? Check the switcher too while you're at it

[badele]

Re: Zyxel gs 1100-16 power supply is dead

So it was the most probable component. Fuse 1A 250v was blown. Shorted the pins for a moment an got 3.5V as output. Thanks everyone for the fast replies.
One last question do i have to replace it with a fast or slow blow one? The package has no information about what kind of fuse this is.

here is a pic too

[stj]

Re: Zyxel gs 1100-16 power supply is dead

that should have "F" or "T" embossed on it.

[badele]

Re: Zyxel gs 1100-16 power supply is dead

thats the problem , it has neither F neither T
On one side it says 1A250V
on the other it a 3D and some circles

[Pentium4]

Re: Zyxel gs 1100-16 power supply is dead

I'd guess F

[stj]

Re: Zyxel gs 1100-16 power supply is dead

F is safest when in doubt.

[badele]

Re: Zyxel gs 1100-16 power supply is dead

ok thanks, just ordered it.

[Behemot]

Re: Zyxel gs 1100-16 power supply is dead

You can replace the caps while at it, output seem like Samxon GF? Those are bad series from Xamson, prone to fail. What is the rest?

[olivier.limal@gmail.com]

Re: Zyxel gs 1100-16 power supply is dead

Hello,

I use a Zyxel Ethernet Switch 24 port and power supply just become defective.
The fuse is blown (2A / 230V AC) , I already replaced it but after power on again, a big electric flash appeared, meaning that issue is bigger than I thought.
For now, I would like to know where I can buy a new one.
I leave in Belgium (Europe), so input power supply is 220/240 volt AC.

Thank you for your precious support.

Regards

Olivier

[Behemot]

Re: Zyxel gs 1100-16 power supply is dead

You are lucky brother! I just acquired bad GS1100-24 switch, seems that the middle CPU of the switch is dead shorted. The PSU only has one bulging cap, I will replace them (unfortunatelly not the input ones as I have no 22uF/400V at the moment, they are on order; you can replace those yourself later, they measure good for now). But otherwise I think it will be working. In such case I can send ya the whole PSU as I have no use for it. Just a notice, it is 3.5A version and it has MUCH more components than the one in the -16 here has.

Anyway, if anybody else meets such a case, these are just ordinary open-frame +5V PSUs. You can replace it with anything, even external wall unit, just solder the connector/cable on it…nothing special needed. If you run the whole thing in a hot environment, solder yourself a fan into it. As it runs fanless, the whole thing must run very hot in such conditions resulting in dying CPUs or PSUs.

[reukiodo]

Re: Zyxel gs 1100-16 power supply is dead

Hrm... if this is all 5V, seems relatively easy to fit and power up a Pi0 in there...

I really wonder why there aren't any manufacturers making switches with support for a Pi compute module, or at least some pin headers to connect similar SBCs...

[stj]

Re: Zyxel gs 1100-16 power supply is dead

switches are specialised devices, a Pi probably isnt fast enough.