EL foil

Parts Questions
1

Dear Boxers

I need your help, really, as i am not familiar with the electroluminescent (EL) technology

I have a Yamaha REV7 with a very old LCD (Hitachi 44780 driver). The backlight is dead. It is not a LED backlight but a sheet of EL material.

So i bought a EL sheet on ebay to replace it. When the sheet arrived i tested it by connecting it to the inverter and it has glowed. But the sheet was too big, so I cut it to the good dimensions.

But after, the EL was no more glowing (??? wtf !!).

I measured the output of the inverter : a pseudo sinusal 150V AC @ 222 Hz

1 - is the inverter dead ? (it transforms 5V DC in 150 AC)

2 - is he EL foil dead ? i cut it with scissors

the sheet is similar to this one :

http://www.elec2go.com.au/images/el%20cuttbale%20panel%201.jpg

inverter is NEL-D32-46

Thanks for your help

Cheers :slight_smile:

[midiboxYamaha_REV7_Schematic_REV7-F.pdf](< base_url >/applications/core/interface/file/attachment.php?id=9601)

2

Do you still have the pads in your design?

eg.

http://www.compsys1.com/support/docs/ELbacklight_Guide.pdf

There are pads that need to remain as part of the foil.

3

thanks for your prompt answer Gilesjuk :slight_smile:

If i well undertand, you call “pad” what i call electrodes : yes there are still is place, there are 3 groups of electrod on 3 sides so that you can cut the EL foil to fit your design