HP150 Touchscreen again

[Tony Duell]

> Are those the same LED's used in the HP 16500 series touchscreens ?

Not having seen inside a 16500, I don't know.

I have extraced the faulty LED (you can do this without removing the 
housing from the PCB, thankfully. I didn't fancy having to desolder all 
21 X-axis LEDs). It's a flat transparent package with a lens 'bubble' on 
the output side. I think it's commonly called a 'side viewing' package.

> As you may know I updated my 16500A to a 16500C version with a upgrade kit
> from Agilent.
> Upgrading included changing the touchscreen PCB, so I've an A-version which
> I don't use or maybe one day will part out.

Why do you chnage the touchscreen PCB? Is the new one a higher resolution 
or something?

> I think change is the LED's are the same, let me know If you want some of
> them.

THanks for the offer, but it appears that both RS components and Farnell 
sell IR LEDs in the same package. I will measure up the old one to check, 
and if they are the same I'll order a few replacements to try them

I'd rather have a sourve of new speres than have to depend on what I can 
raid from old boards.

-tony