Re: Using a US Lisa in the UK

From: Diogenes45 <helmut_post_at_email.domain.hidden>
Date: Fri, 13 Nov 2009 01:47:15 -0800 (PST)

Hi Ian,
it's not tricky to convert the Lisa PSU's from 110/120 Volts 60 Hertz to 220/230Volts/50 Hertz or vice versa.
The only thing you have to do first b e f o r e you plug in your Lisa into any european Live voltage connector is to change your (wire) jumper configuration inside the PSU. You can easily find those 2 wires and the 110Volts and 220 Volts connectors respectively. Simply remove the wires by unplugging them from their 110/120 Volts configuration and reinsert them into the 220/230 Volts configurationyou  can easily find the correct configuration on the PCB. The most important thing is to exchange the power surge (decoupling) caps first- the transparent caps with the fine crackles... they tend to explode. I had 2 explosions in my Profile PSU and 1 in my Lisa- but this didn't do any harm to the other parts in my profile and Lisa. Perhaps I was lucky....

BTW: I used WIMA caps- most of them are no longer transparent- they changed the plastic material.

Best regards,
Helmut Post

On Nov 12, 7:44 pm, thelawman <ila..._at_email.domain.hidden> wrote:
> Hi all,
> I've been lurking here for a few weeks, but this is my first post.
> I've just got my hands on a Lisa 2/5 which is being shipped from the
> US to me in London. I'm assuming that it's got the 1.2A 110v/60Hz
> Apple power supply and that the Profile drive is also US power spec.
> As I understand that the 1.2A PSU is tricky to convert to 220v/50Hz
> and I'm guessing that converting the Profile drive isn't easy either,
> I was wondering if I could get away with using a US-UK step-down
> transformer?  Although a transformer will convert the voltage to 110v,
> the frequency will remain at 50Hz - will the Lisa and Profile PSUs be
> able to tolerate the lower frequency? If not, do I have any other
> options?
> Many thanks in advance for your help,
> Ian
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