norman@sdcsla.UUCP (Donald A. Norman) (03/11/85)
I am trying to figure out how to use the ImageWriter both in Europe
(primarily England) and in the US. The normal procedure -- and the one
that works for the Macintosh CPU itself -- is to purchase a system that
works on 115V, 50/60HZ, and to use a step-down transformer when in Europe
to get the voltage right. The problem is that the Apple ImageWriter manual
states that the Imagewriter is available in four versions, none of which
seem proper for this purpose:
115V +/- 10% 60Hz
100V +/-10% 50/60Hz
220V +/-10% 50Hz
240V +/-10% 50Hz
The only option for both 50 and 60HZ is for 100 Volts, a voltage level that
is not standard anywhere, as far as I know. Thus, it would not work
either in Europe or in the US, at least not without a transformer that
stepped down the US 115V to 100 and the European 220 or 240 V to 100.
(Unless one could push that 10% tolerance level a bit -- but then the power
at the wall outlet is probably only within 10%, and it could swing in the
wrong way.) Has anyone else faced this problem? What is the solution?
Donald A. Norman
Institute for Cognitive Science C-015
University of California, San Diego
La Jolla, California 92093
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