DC-DC converter in my RCA VLT260 VCR runs too hot?

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Article #6985

#6985

From: robert.f.casey
Date: Mon, 31 Aug 1992 17:48

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Just replaced a DC-DC converter module in a RCA VCR, model VLT260
(made by Hitachi, I think).  The old one burned out, and the new one
gets awfully hot, a bit too hot to touch.  Can't find any overloads
on the outputs, voltages correct.  Before I installed the new one, I
used some bench power supplies to supply the voltages that this
thing generates, and didn't see any seemingly exeessive current demand.
Other power handeling parts of this VCR also run hot, so maybe this
module getting hot is normal?  If so, than i'd call it marginal
design.  I stuck a heat sink on the module to try to cool it some.
Anyone have experence with this or similar VCRs?

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Message-ID: <1992Aug31.174845.14095@cbfsb.cb.att.com>

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References: <1992Aug28.205445.16138@news.dfrf.nasa.gov> <BtuxxK.GMu@undergrad.math.waterloo.edu>

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Newsgroups: sci.electronics
Path: arc1-ca.pugleaf.net!sparky!uunet!wupost!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!linac!att!cbfsb!cbnewsb.cb.att.com!wa2ise
From: wa2ise@cbnewsb.cb.att.com (robert.f.casey)
Subject: DC-DC converter in my RCA VLT260 VCR runs too hot?
Message-ID: <1992Aug31.174845.14095@cbfsb.cb.att.com>
Keywords: PADS schematics
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Organization: AT&T
References: <1992Aug28.205445.16138@news.dfrf.nasa.gov> <BtuxxK.GMu@undergrad.math.waterloo.edu>
Date: Mon, 31 Aug 1992 17:48:45 GMT
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