Sorry, I was thinking of the CW-80 which looks identical. That power supply has a fuse.
If the CW-40 Powermax does not work, just replace it with a bigger transformer like the CW-80, or a non-electronic postwar transformer.
There may be a fuse in the transformer windings. FWIW, I've replaced some of the fuses in various transformers and power bricks (Legacy #990), with a PTC. Solves the problem of ever having to open it again, and also provides circuit protection.