[Elecraft] Help! Rescue me from stupid error!

[tomb18 at videotron.ca]

Hi,Typically a device labeled as znr is a MOV, metal oxide varistor used to protect cir u its from excessive voltage or currents. Remove the other one, you will probably find a marking.
73s Tom
va2fsq.com

On 9/9/14, "Vic, K2VCO"  <k2vco.vic at gmail.com> wrote:
> I just did one of the dumbest things I've done since I tried to swim across the Susquehanna river with all my clothes on. I survived that, but I need help with something else.
> 
> I just turned on a computer plugged into 230v with the switch on the power supply set to 115v. Result: bang, smoke, house breaker (16a) pops.
> 
> I took the power supply apart (it is a funny size so I have little confidence I could replace it). I found two obviously bad components: 1) an 8a fuse -- no problem. 2) something marked znr1 on the board, a component wrapped in heatshrink tubing. It was completely destroyed. Next to it is a similar part labeled znr2. I haven't removed it yet -- so I am not sure it is good. It might be the same as the first one and it might be marked under the heatshrink.
> 
> There is a bridge rectifier nearby which checks good. All traces look ok. I am hoping there is someone out there who is familiar with these supplies who can suggest what these are (zener diodes? What voltage?)
> The board is made in such a way that it is difficult to trace the wiring -- but these parts are right near the power input.
> 
> -- 
> Vic, K2VCO/4X6GP
> Rehovot, Israel
> http://www.qsl.net/k2vco/
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