Luxman L509X fuse type

Can anyone tell me what fuse my Luxman L509X amp takes? Thanks.
I just looked online.  I'm not sure, but in a pinch, and in the US use a 3A slow blow fuse.  You may be able to use slightly higher, but wait for confirmation.
I have the 507ux, and just realized it does not have an external fuse holder of any sort. I'm a little bit in shock.  I've not seen this in forever.