Date: Thu, 06 Sep 2001 14:00:01
From: "neil barnes" <[EMAIL PROTECTED]>
Subject: Re: CT70 dead screen - attention Matt
>Date: Thu, 6 Sep 2001 09:13:27 -0400
>From: "Pres Waterman" <[EMAIL PROTECTED]>
>Subject: Re: CT70 dead screen - attention Matt
>
> >
> > Seriously, I tested it by bending a paper clip and using that to short
>out
> > the suspect fuse - lo and behold, the screen lit up! If the fuse is ok,
>the
> > paper clip will make no difference, but of course you don't want to
>short
> > the fuse to anything else :)
>
>
>But whatever blew the fuse will now be UNPROTECTED by that paperclip...
>resulting in anywhere from good news, to really bad news. This is unsafe
>advice.
>
>Thanks
>
>Pres Waterman W2PW
Pres,
Perhaps I wasn't clear that the *testing* that the PCB fuse was blown was
performed using the paper clip. Safe, because (a) low voltage - 5V (though
current could be highish) and (b) whatever blew the fuse was no longer
attached to the circuit[1]. But not to be performed by someone not
reasonably aware of the potential problems.
The fuse has been *repaired* by soldering correct rated fuse wire to the
outside of fuse, pending the unlikely acquisition of the correct replacement
component. The paper clip is retired to a position of high honour, where it
will collect a small pension from the Empire.
I should stress that I do not recommend *anyone* without the necessary
skills, knowledge, and physical agility should perform any modifications to
the Lib circuit boards. However, Matt was already aware of these
limitations.
Cheers,
Neil
[1] The machine in question had been dropped, which had totalled the screen,
though the lamps and inverter still worked (so I'm told, I haven't seen it).
The fuse probably died at the same time, either through some temporary short
in the screen or from the impact.
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