19 Jan
2002
19 Jan
'02
7:46 a.m.
Quothe Tony Duell, from writings of Sat, Jan 19, 2002 at 06:50:27PM +0000:
Ouch! What ever happened to user-replacable fuses to
handle such problems?
They were apparently found to be more than blatantly incompatible with
the "no user serviceable parts inside" stickers, and hence done away
with. It still surprises me that all recently manufactured electronics
equiment isn't sold with cases that are welded, or super-glued,
closed, or that screwdrivers haven't been outlawed.
Many transformers have thermal fuses designed to open
the primary circuit
under such conditions. If you can open up the PSU box, you may find a
replacable (with soldering iron and pliers) thermal fuse on top of the
transformer, or stuck under the tape covering the windings.
Is that only for transformers sold in the U.K., or in the U.S. as
well, and is this something fairly new? (e.g., within the past 10
years or so?) None of the transformers that I've disassembled have
had these fuses in them, but I've not disassembled any made in recent
years.
Some plastic cases have a conductive (Nickel-based?)
sheilding coating on
the inside. The HP thermal printer that's currently taking up most of my
bench does. Of course cheaper stuff tries to get away with no shielding :-(
Aluminum foil and glue to the rescue? :-)
--
Copyright (C) 2001 R. D. Davis The difference between humans & other animals:
All Rights Reserved an unnatural belief that we're above Nature &
rdd(a)rddavis.org 410-744-4900 her other creatures, using dogma to justify such
http://www.rddavis.org beliefs and to justify much human cruelty.