Article View: sci.electronics
Article #2892Re: Sony remote controll
From: Doug Mcintyre
Date: Tue, 14 Apr 1992 19:05
Date: Tue, 14 Apr 1992 19:05
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>In sci.electronics, ldstern@rodan.acs.syr.edu (Larry Stern) writes:
>
>>To all: a neighbor of mine has a 6-7 year old Sony Trinitron, which works
>>well except for the remote control. The remote had an intermittent problem
>>where it would work fine for a few weeks, not work at all for a few days,
>>start working ok again, etc. It seems it is now, finally, dead. There is
>>one IC, a crystal, a few resistors and caps, and an LED inside. My question
>>is, what usually goes? Is this worth fixing? And finally, can this LED be
>>tested with an ohmeter like a "regular" diode?
In my experience, it is generally a cracked solder joint from the remote
being ``dropped'' accidently or so. Since the circuit is so simple (yes an IR
LED is the same as a visable light LED), its fairly simple to trace the signal
around the circuit. Ie. check at the base of the transistor, and at the
collector, check at the LED, etc. etc. Wiggle things around alot.
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Path: arc1-ca.pugleaf.net!sparky!uunet!zaphod.mps.ohio-state.edu!mips!news.cs.indiana.edu!umn.edu!cs.umn.edu!kksys!orbit!pnet51!dougm From: dougm@pnet51.orb.mn.org (Doug Mcintyre) Newsgroups: sci.electronics Subject: Re: Sony remote controll Message-ID: <7479@orbit.cts.com> Date: 14 Apr 92 19:05:01 GMT Sender: news@orbit.cts.com Organization: People-Net [pnet51], Minneapolis, MN. Lines: 19