Fender Rumble 150, is there a fuse access on the exterior of the Amp.

Fender Rumble 150 bass amplifier P/N #851CFOOO8 REV. A

everything seems to work, headphone jack etc. checked all input cables and went through cool down procedure with fan.

I thought maybe someone could save me some time staring at a schematic. it seems like it could be a simple fuse link, if it is a fuse link, where would it reside.?