Hitachi SH-G1000 - Manual (Page 232)

Section 4: Safety Guidelines and Warranty Information
224 4A: Safety
ᮣ Connect the equipment into an outlet on a circuit different from that
to which the receiver is connected.
ᮣ Consult the dealer or an experienced radio/TV technician for help.
Caution to the user: Changes or modifications not expressly approved by
Hitachi Ltd. void the user’s authority to operate the equipment.