[Robotgroup] Troubleshooting TV remote control

[Andre Lamothe]

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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> >
>
>


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