my first ssl : put the power on and : smoke

digichild · Feb 4, 2005

i did not put any ic in,just wanted to measure if the voltage is right..one 10r resistor at the powersupply smoked...i am using a 2x18volt trafo and instead of the suggested b350c1000 i am using a b380r rectifier...

do i have to put the ics in before testing the voltage?

radiance · Feb 4, 2005

[quote author="digichild"]

.....
...

do i have to put the ics in before testing the voltage?[/quote]

No, it was wise to leave them out.
Check for shorts near the 79/78L12, the one near the smoked resistor.

digichild · Feb 4, 2005

thanx for yor input,i dont see any shorts...tomorrow i will go and buy some new resistors,then i check again... :grin:

heybluez · Feb 4, 2005

Hi,

I had a smoking SSL as well when I first built it. It was a combination of a lot of shorts on the PCB. I don't know if you etched your own or got one from the black market but make sure to check the entire board for any shorts.

I did have a smoking issue when i blew a regulator on my 1176 but it took me a little to figure that out....not a good thing!! It fried my transistors...even blew up my 5532. That is another one.

SO check the regulator and the caps as vital suggested.

let us know.