HP 1100A - Manual (Page 18)

18 Chapter 1 Getting to know the printer EN
Turning the power off
Printers that require 100-127 volts of power must be unplugged to
turn the power off. Printers that require 220-240 volts can be switched
off (the switch is located on the left side of the power plug) or
unplugged.
Note To ensure safety when working inside the printer for any reason, it is
best to unplug the printer.
Voltage conversions
HP LaserJet printers are manufactured to different specifications for
different countries. Because of these differences, HP does not
recommend transporting products sold within the United States to
another country.
In addition to the concerns about the differing power system voltages,
the country of final destination may have different import and export
restrictions, power frequencies, and regulatory requirements.
Note The HP LaserJet family printers must be serviced by an authorized
repair depot or reseller within the country where the printer was
originally purchased.
Because of the different specifications and warranty coverage
limitations, Hewlett-Packard does not offer a conversion, or support
the conversion, of U.S. version HP LaserJet family printers for foreign
use. We advise those customers planning to transport equipment
outside the United States to purchase the products in the country of
final destination.