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From: philip@pescadero.Stanford.EDU (Philip Machanick)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Power Supply for Classic configurable for 110/220 volts??
Message-ID: <1991Jan6.193840.4480@Neon.Stanford.EDU>
Date: 6 Jan 91 19:38:40 GMT
References: <1991Jan3.102238.829@bernina.ethz.ch>
Sender: news@Neon.Stanford.EDU (USENET News System)
Reply-To: philip@pescadero.stanford.edu
Organization: Computer Science Department, Stanford University
Lines: 29

In article <1991Jan3.102238.829@bernina.ethz.ch>, czychi@bernina.ethz.ch (Gary Czychi) writes:
|>    when I opened a Mac Classic lately, I found on the cover of the
|> analog board two checkboxes with the following text:
|> 
|> 	|_| 120V: Jumper JP1 in Place
|> 
|> 	|x| 240V: No Jumper JP1
|> 
|>    Because this Classic was bought in Europe, it is configured for 240
|> volts and therefore the second line was checked.
|> 
|>    And here comes my question:
|>    There are said two be two entirely different power supplies for the
|> Classic, one for 110V and the other for 240V. Is this really true or
|> is there just one power supply which you can configure yourself for the
|> correct voltage?

You may be OK if the power supply was originally intended for 240V, but an
Apple engineer told me some of the components on the 110V models weren't
designed for the higher voltage, and hence just changing a jumper could
lead to problems.

It seems to be hard to get definitive answers on this. Maybe Apple doesn't
always use the same power supply on the same model?

If anyone else has greater clarity, I would be interested to know too.
-- 
Philip Machanick
philip@pescadero.stanford.edu