Date: Mon, 17 Sep 2001 20:21:48
From: "neil barnes" <[EMAIL PROTECTED]>
Subject: Re: CT70 dead screen - attention Neil
Yo Matt,
>Neil,
>
>My brother's friend came over tonight with a multimeter, and that 2A fuse
>tested fully open... no resistance at all. Looks like this may be the
>culprit. I just hope this, relatively new, Radio Shack digital mulitimeter
>didn�t feed anything back into the circuit and screw something else up.
Don't worry - digital meters measure ohms with micro amps, even analogue
ones only have milliamps.
>
>It took a while to figure out how to set the meter ranges� and the first
>few
>readings at some ranges LOOKED LIKE I was getting 10 ohms across the fuse
>when I first put the probes on the fuse. I kind of expected to see some
>kind of low circuit resistance. I think I remember your saying I should
>see
>.2 ohms if the fuse was good. After screwing around with controls, I
>figured how to set the ranges manually (there was an �auto� setting I was
>getting odd results from) and set the range to its lowest setting. There I
>got .9 ohm across the 5a fuse (the meter wouldn�t zero either� or I
>couldn�t
>figure out how to do it)� and a fully open circuit across the 2a fuse in
>question.
Sometimes there's an auto zero on a digital meter, shorting the leads
together for a while usually does it. But a fully open circuit suggests
that's the bad boy.
\
>
>So I�m hoping my initial 10 ohm reading was due to the meter not being set
>up right, and not because that�s what is actually was before the meter blew
>out something else. Haven�t soldered a fuse wire yet or reassembled
Most likely 'finger trouble' hehehe!
>yet to
>see if the system still works, but I thought it was dead anyway� so no big
>deal.
>
>The guy brought over a cylindrical 1 inch 2a glass fuse with the metal caps
>thinking I might be able to heat the caps off and use the fuse wire inside.
You could do this but I guarantee you'll burn your fingers. But they will
unsolder given enough heat.
>Though he wasn�t sure if the wire would accept solder. Guess this kind of
>wire should be available from electronics supply stores, right?
Any electronic shop, or a mom-n-pop hardware shop should have fuse wire on a
card. (At least, they do in the UK). Circuit City?
>
>So are you in CA now? Read you saying you�re in forests somewhere. The
>forests of the mountains out there are beautiful. I used to backpack in
>the
>Sierra Nevadas a lot and loved it. One of my favorite ways to live!
>
Absolutely wonderful - though a slight feeling of...um...I dunno...regarding
Yosemite valley - but the high mountains are stunning. Only problem - the
damn weather's too good - not a cloud in the sky so the photos might be a
bit boring :)
This message brought to you courtesy of Bakersfield Library...
Neil
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