Is there a FULL tutorial of how & when to use JTAG?

attention z3x developer, admin & staff

easy jtag

bought it almost two mons. now,

i havent repaired a single phone,

already busted 8 samsung phone which i purchase for practice purposes

– is there any COMPLETE GUIDE FOR USING EASY JTAG?

heres the thing,

let say i have n7100 deadbot – what will be the procedure?

and if have the same unit but not dead – what will be the procedure?

easy jtag is a powerful tools, but whats the use of it if u dont know how to use it properly???

if someone could redirect me where to start and whats to read or watch proper video of how to use jtag from using jtag tools, i would really appreciate it…

thanks…