Discharging a VT100 CRT

Allison ajp166 at bellatlantic.net
Thu Nov 10 06:25:48 CST 2005


>
>Subject: RE: Discharging a VT100 CRT
>   From: "Julian Wolfe" <fireflyst at earthlink.net>
>   Date: Thu, 10 Nov 2005 00:13:50 -0600
>     To: "'General Discussion: On-Topic and Off-Topic Posts'"	<cctalk at classiccmp.org>
>
>Well Well Well.
>
>On closer inspection, it is very clear that the cap is what blew (it's
>exploded and blackened on one end) is at C439, and the diode is CR408.  The
>diode description in the maintenance print is aggravatingly overwritten by
>the entry above it as it ran over.
>
>The cap is a 75MFD, 6V, +75-10% Electrolytic cap
>
>Where should I go from here?

Well thats a horse of a differnt color.

CR408 is a 1A 400V diode  (1n4006 should do)
the cap is what it is. and should be replaced.

The easy test is replace the diode and cap and see if it works.
if cr408 or R478 get hot (not warm) then other problems exist.


Allison





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