Samsung UN55FH6200FXZA - Manual (Page 339)

The Reset function initializes all
downloaded applications, erases all
user accounts and settings from the TV,
and resets all Smart Hub settings to the
factory default settings. It then restarts
Smart Hub as if it were starting for the
first time.
Your account, however, remains on
the Smart Hub server. To log into your
account, enter your ID and password
on the Login screen.