[Robotgroup] Troubleshooting TV remote control

[Andre Lamothe]

If you can borrow a universal remote that might be a good test to see if the 
set works. What year is the set? I have a couple universl remotes, you can 
borrow one to try if you don't get your hands on one by the next robot 
meeting. You just need to try all the codes for your TV, usually 3-10 codes, 
so a little tedious, but that way we can make certain the TV's receiver is 
good or bad.

Andre'

----- Original Message ----- 
From: "Def Egge" <robodigest at innervate.com>
To: <robotgroup at puremagic.com>
Sent: Sunday, February 03, 2008 9:39 PM
Subject: Re: [Robotgroup] Troubleshooting TV remote control


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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-- 


All the best....


Mike


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