Help on Sony receiver bug (stk3041 chip)

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Article #9621

#9621

From: sra
Date: Mon, 21 Jan 1991 09:51

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I've come across a Sony receiver.  Unfortunately, it doesn't quite work.
It has a chip, STK3041, that is a combination stereo preamp and impedance
detector.  I think it has a problem but at $26 to replace, I can't just
substitute (the receiver cost me $10!).

After turning unit on, within 15 secs, the amplifier shuts down.  The input
to the stk3041 is still on.  Can anyone provide circuit details of this chip?
Who makes it?  I'd like to try to defeat the impedance detector to see if I
can keep the unit on.  (I'm sure the problem is in the impedance detector
circuit - but not necessarily in the chip).

tnx, steve

  /------------------------------------------------------------------------\
  >   Steve Alpert (W1GGN)  IDX Corporation    Marlborough, Massachusetts  <
  \--------------------------- sra @ idx.com ------------------------------/

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!IRO.UMontreal.CA!matrox!uvm-gen!idx!sra
From: sra@idx.com
Newsgroups: sci.electronics
Subject: Help on Sony receiver bug (stk3041 chip)
Message-ID: <2224.279ab9b2@idx.com>
Date: 21 Jan 91 09:51:46 GMT
Organization: IDX Corporation, S. Burlington, VT
Lines: 16