> > The original resistor (as mentioned in the Subject: line) was one of those > > safety fusible > > resistors. AFAIK none of the ones that Farnell stock are. > > Oops, I missed that part of the subject line. It'll be fusible for a > reason, so should be replaced with the same type. Moreover, if it's > gone, there's probably something else wrong too, so maybe Adrian needs a > pair ;-)
I know rather more about this than Adrian has said, so I might as well let on. It's from a VT100 power supply board, it's in the chopper circuit. The chopper transistor has failed short-circuit B-C and open B-E and this took out the resistor (as far as I can tell). Knowing how chopper circuits behave (or don't!) I agree this must be replaced by a fusible resistor. Otherwise next time the chopper fails it might be spectacular -tony
