Looking for a 2W 1 ohm fusible resistor
ard at p850ug1.demon.co.uk
Thu Mar 3 09:21:11 CST 2016
> > 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
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