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From: dje@datacube.UUCP
Newsgroups: sci.electronics
Subject: Re: Components
Message-ID: <100500021@datacube>
Date: Wed, 14-Oct-87 20:04:00 EDT
Article-I.D.: datacube.100500021
Posted: Wed Oct 14 20:04:00 1987
Date-Received: Sat, 17-Oct-87 04:35:20 EDT
References: <2420@i.cc.purdue.edu>
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Nf-ID: #R:i.cc.purdue.edu:-242000:datacube:100500021:000:905
Nf-From: datacube.UUCP!dje    Oct 14 20:04:00 1987


>The hot chassis used to be common in TV sets, but it went out when solid
>state components took over.  Modern sets have power transformers (usually
>more than one) just like other pieces of electronic equipment.  Most sets
>have polarized plugs, though; these minimize shock hazards from leakage.

Be careful:  This is not necessarily so.  Many solid  state sets just
rectify  the  110  to  create  170VDC which  is used  directly by the
horizontal flyback  circuit.   Then they  tap off  lower voltages for
other circuitry.  This apprach is ultra cheap as  it has  no AC power
transformer.  Some use a switching supply which is non-isolated.  

 				Dave Erickson
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