Replacing SMD Fuses without access to schematics
No.  



Even for an intact fuse it's impossible to find out its rating in a non-destructive way if there's no marking. If it's blown it's even less possible.  

You'll need the schematic to know the value. If you would reverse engineer the circuit to re-create the schematic you may have an idea of the value, but most often the designer has a certain range to choose from, depending on how cautious he is.

But without schematic it's not possible.