[Dillen]

The recitifier board pulls right up when you pry away the small black claw that holds it.
The regulator itself has three pins that goes into a connector. The regulator stays with the chassis.

The filter capacitor is a “soldering star” type – not a snap-in. They are known to go bad.

Also check the rectifier diodes. I’ve seen cases where owners fitted schottky types, – not sure why, presumably in a misunderstood attempt at improving something,
– and they are no good in this position. They typically go with a bang.

Martin