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/
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com
