Domestic 110V ImageWriter II and ImageWriter LQ printers can be used on
voltages greater than 110V.
One solution is to use a step-down transformer. Unfortunately, with this
method you sacrifice some horizontal and vertical print registration, and
force the internal DC stepper motors to run hotter, thus becoming
unreliable in a shorter period of time than normal. Apple does NOT
recommend or support this method.
A better solution is to use a transformer/voltage switch assembly (Apple
Service Part #915-0029). With the installation of this part, an
ImageWriter II can be converted from 110V to a universal printer (which
be altered to suit power supplies of different voltages.) This switch
assembly contains a built-in selector switch, and is designed for an
operating range of 100V to 240V, and a frequency range of 48 to 62 Hertz.
The catch is that this particular part is currently not sold domestically
(US and Canada,) but only abroad. The #915-0029 transformer/voltage switch
assembly is only installed in printers expected to be sold in areas of the
world where the operating frequency is in the 48 to 62 Hertz range. However,
a consumer CAN request that an international service provider sell them
this part.
The transformer/voltage switch assembly is the ONLY part that differs from
a 110V printer. It is included in all International-manufactured printers.
The transformer assembly used in 110V printers works properly in the
operating range of 58 to 62 Hertz only.
(NOTE: Part #915-0029 is for ImageWriter II ONLY. The universal
transformer/voltage switch assembly for the ImageWriter LQ is Apple Part
#915-0031.)
Most printers sold outside of the United States and Canada are equipped
with the universal, or selectable, power supply, therefore no change --
other than switch position -- is required. Once the printer is converted,
no other hardware (such as a step-down transformer) is required.
Here are the frequency operating ranges of ImageWriter II and ImageWriter
LQ printers:
- Domestic Units 110V units @ 58 - 62 Hertz
- International Units 110V to 240V units @ 48 - 62 Hertz