[Robotgroup] Troubleshooting TV remote control

[Robo Al]

Some times I come up with good thoughts :-)

Mike, while looking for the universal remote I also found 
an old Samsung VCR remote that you can have. Hopefully you
can salvage the IR diodes.

Alberto

On Sun, 2008-02-03 at 22:07 -0600, Andre Lamothe wrote:
> Well, there you go, he read my mind.
> 
> Andre'
> 
> ----- Original Message ----- 
> From: "Robo Al" <sp-18561884 at ggsys.net>
> To: "The Robot Group Mailing List" <robotgroup at puremagic.com>
> Sent: Sunday, February 03, 2008 9:55 PM
> Subject: Re: [Robotgroup] Troubleshooting TV remote control
> 
> 
> I have a universal remote somewhere. I can bring it to
> you to test the TV.
> 
> Alberto
> 
> 
> On Sun, 2008-02-03 at 21:39 -0600, Def Egge wrote:
> > Thanks for the tips, Andre'.
> >
> > I read somewhere a long time ago (in a galaxy far, far away) that the
> > IR LEDs used in remote controls don't handle continuous operation very
> > well.  I cannot put my finger on the source but the 'fact' stuck in my
> > head.
> >
> > I do not have a compatible remote for this set.  I will search for the
> > specs on the TV as well as for the remote.
> >
> >
> > Quoting Andre Lamothe <ceo at nurve.net>:
> >
> > > Boy, the chances of the IR led going are 1 in a million. Definitely 
> > > scope
> > > the LED voltage to see what the peak to peak is, some leds have more or 
> > > less
> > > forward voltage and the one that it uses might take more or less, so the 
> > > rad
> > > shack might not work. The wavelength is probably ok since there's a lot 
> > > of
> > > room for error in that with IR. Do you have another set that is 
> > > compatible
> > > with the remote, remember, the TV's IR receiver might have went bad :) 
> > > So
> > > you are at the wrong end of the problem. But, if you're lucky, sound 
> > > like
> > > you have a bad IR LED.
> > >
> > > Also, if you really want to be a nerd see if you can find the tech specs 
> > > for
> > > the TV online, they always have the remote with them and the wavelength 
> > > etc.
> > > of the IR emiiter as well.
> > >
> > > Andre'
> > >
> > > ----- Original Message -----
> > > From: "Def Egge" <robodigest at innervate.com>
> > > To: "The Robot Group" <robotgroup at puremagic.com>
> > > Sent: Sunday, February 03, 2008 8:14 PM
> > > Subject: [Robotgroup] Troubleshooting TV remote control
> > >
> > >
> > >
> > > TV remote went south after a night of being lost somewhere in the
> > > interior of a recliner.
> > >
> > > Batteries were low - replaced....
> > >
> > > Contacts cleaned to be certain....
> > >
> > > Confirm that digital camera can detect IR pulses on a working
> > > remote....
> > >
> > > Checked for IR pulses with digital camera - nothing....
> > >
> > > Checked as much of the analog circuitry as I am able - no obvious
> > > failed components nor broken leads / traces in PCB....
> > >
> > > Soldered visible LED across the leads of the IR LED in the remote -
> > > Ah ha!  Visible LED pulses....
> > >
> > > Need to replace 5mm IR LED - Rat Shack carries a 1.2V 5 mm IR LED
> > > (940 nm), model 276-143   Problem solved?
> > >
> > >
> > >
> > > --
> > >
> > > All the best....
> > >
> > > Mike
> > >
> > > _______________________________________________
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> > >
> >
> >
> 
> 
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