Electronics > Repair
Replacing the LCD-Backlight(EL-Foil) on Neutrik A1, Edit: New Display wanted
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Martin72:
Hi,
I thought it might be helpful for others if I described how to change the backlight of an older LCD display, in this case of an audio analyzer system, Neutrik A1.
At first I didn't know that its display is illuminated... :-X
I came across it by chance in the manual, because the switch-off after a few minutes was described there - with my A1 I had never seen anything light up... ???
But in fact, when it is completely dark in the room, you can see a very faint glow... ;)
LCD-Display is a 5.3" one from Optrex and the backlight is realized with a EL-foil...
Afaik EL-foil get several advantages, e.g. ultra-thin, but at least two disadvantages:
-Must be driven with "high voltage" (appx 100V/400hz)
-Lifetime....1000...2000hrs
It gets darker and darker until at the end only a barely perceptible glow remains...Aha. ;)
The display-module is obsolete and EL-foils are rare but I had luck and find one very similar here:

https://www.backlight4you.com/EL-Panels/EL-Replacements/EL-Panel-pink-white-77mm-x-140mm-laminated::839.html

This store specializes in backlighting, including hard to get ones, very nice.
Yesterday the foil arrived and I´ve started to disassemble the frontpanel of the analyzer.
Tomorrow it should be finished..

edit: link to shop fixed.
inse:
Further disadvantage: very low efficiency.
And 100V 400Hz is surely beneficial in an audio analyzer, no?
Martin72:
I think the engineers at Neutrik were aware of this. ;)
tooki:
Nice!

That reminds me that it's still on my to-do list to replace the EL backlight on my Keithley 197A...

P.S. FYI, in English, the word "foil" exclusively means very thin sheets of metal; for any non-metal material, it is a "film" or "sheet".  ("Film" also has the second meaning of "coating", e.g. a thin layer of one thing on a substrate. In this case, you'd typically use "film" even for metals, like in metal resistors, where a thin film of metal is used, or in antireflective lens coatings, where thin films of minerals and metals are applied.)
Martin72:
Type "Leuchtfolie" in the deepl translator, it shows two possibilities, foil and film.
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