Mac II PSU CR-45S bad - blows fuse when plugged in

[Byrd]

Hi all,

I've a Macintosh II PSU, model CR-45S that immediately blows its 250V/6.3A fuse when plugged in, tripping off the circuit breaker of the house.  The PSU itself is spotless - the only damaged noted is at L202, where the lid of a component has come off.  I suspect it's some sort of large resistor (can see wire wound copper inside the component where the lid fell off).

Which is where I'll start when I get the PSU out of the case - do others know of common failure points in the Mac II PSU?  Would a failed resistor cause the PSU to fail so quickly?

Thanks

JB

 

[bibilit]

a bad Mosfet can do that and probably a bridge rectifier.

 

[techfury90]

That's not a resistor, that's a coil. Resistors are usually designated with R, not L. L is usually for coils (inductors, etc.) in terms of component designations. Plus your description matches with a coil more. Hopefully the wire is okay, because you're going to have a hell of a time replacing that, otherwise. I concur with what bibilit says.