On Dec 28, 23:07, Chad Fernandez wrote:
> Tony,
>
> the fuse itself has an "F" inside a "L" looking line. One circular
end
> has a symbol that I can't type and the other has a "237" "UL" and an
"SA".
IIRC, that F-in-an-L is the logo for Littelfuse. It certainly doesn't
mean fast-blow. You probably want a slow-blow fuse for a device like
this. Why? Because in many electronic devices, there's a surge of
current for a short while, when you first switch it on. This is caused
by the capacitors charging up, and is quite normal.
> I find one cylindrical cap that is 200v and 220uf and one 250v .1uf
cap
> that looks like a chicklet (kind of chewing gum). I don't have any
idea
> how to identify a chopper transistor..... could that possibly be
labeled
> "Q1" and have a heat sink on it? I also see a couple transformers
and a
> bunch of resistors an IC and assume most of the D#'s are diodes.
There
> are quire a few "Q#" labeled items too.
Yes, "Q1" is a designation for a transistor, normally. And the voltage
ratings for the capacitors suggest they're close to the mains, which
implies a sitching PSU, not a linear one. The small chicklet cap is
probably an X-rated or Y-rated suppressor cap. The transformers are
probably fairly small (an inch or two on a side), yes? For a linear
supply, I'd expect one big transformer, probably mounted on something
solid; one or more small(ish) ones are typical of a switcher. Anyway,
unless this laservision player is unusual, I'd expect such a device to
have a switcher.
--
Pete Peter Turnbull
Network Manager
University of York
Received on Mon Dec 29 2003 - 03:46:43 GMT