I have come across a faulty component that needs to be replaced but I can't identify what it is and thus where I can buy it from. It is disc shaped with 2 pins and on top it writes 'K391 J8'. Any help is appreciated.
Normally I would agree with you on the 5% thing, but the fact that the J is combined with an 8 makes me wonder if it's not a different type of code rather than tolerance. If the component isn't a cap, that would be likely...
I must have been about to doze off when I read the post. Missed the two lead disk part. Is it thick? Might be a MOV, they like to blow up. Where is it used?