Re: My sick 2/10

From: Jason Perkins <quanda_computing_at_email.domain.hidden>
Date: Sat, 27 Nov 2004 20:42:31 -0500

> Is it possible that the power supply is "ticking" after you try to turn it
> on?

> There is an adjustment for the power supply, through a small hole near the
> middle of the big side. You normally have to take the PSU out of the Lisa
> to adjust it. (and repeat until the voltage is right)
> Turning the adjustment clockwise decreases the +5 volt output.

The pot (r11) was set at about the 11 o clock posotion, it turned to the 1 o clock posotion. I reinstalled all the cards and the drive cage, but but did not power on. For giggles, I also tried the 9 o clock and 6 o clock posotions, but they all had the same result... a whump from the speaker.

I put my ear to the back of the machine where the PSU is and listened. When the machine is 'off' there is a very faint hum. When I press the power button, there is a quick hiss sound (hsssssssst).

Just curios, what is the other pot on that riser card for?


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Received on 2004-11-27 17:54:41

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