Casio CZ/ VZ/ FZ - Pro Series

I think it is the reflective backing which is impeding the light - it seems a bit of a palaver to not destroy the polarizer. The PDF is the thing I was looking for - which is somewhat the same as the instructables/ALLsteps.

Thanks


      From: "Daniel Forró danforcz@... [CZsynth]" <CZsynth@yahoogroups.com>
 To: CZsynth@yahoogroups.com 
 Sent: Friday, 16 September 2016, 11:23
 Subject: Re: [CZsynth] VZ-10m display
   
    Somebody did this difficult task with removing reflective foil, I try to remember where I have seen it... Maybe I have the file somewhere on my hard disk...
...googling...Found it:
www.compsys1.com/support/docs/ELbacklight_Guide.pdf‎

Rather difficult job, and if I remember well he used EL foil, there was no place for LED backlight.
I doubt it's possible to modify standard display for LED backlight. If it's possible technically it would be a big effort which has no sense when we can use cheap new display with LED backlight. If the original display uses usual standards for displays (not all were standard) and inside the instrument is enough space (LED backlit displays are thicker) then the modification is not so difficult. Just remove inverter and its circuit, solder limiting resistor and bring +5 Volts...  Even size of display and holes for screwing it are standard. See for example here:
http://www.wolzow.com/analog/mdf2.htm
Some users even used VFD or OLED displays successfully...
...googling...
Here is something similar:
http://www.instructables.com/id/DIY-LCD-backlight/?ALLSTEPS
http://www.circuitbenders.co.uk/forum/index.php?topic=945.0
So the point is to remove only reflective foil, not polarizing foil.
Another problem is to align elastomer zebra contacts to proper position not to lose some rows of pixels.... I did this more times and it's pretty difficult. I lost two big graphic displays because I couldn't find the right position. Maybe with simple alphanumerc display it can be done.
Daniel Forro


On Sep 16, 2016, at 6:39 PM, Lee templarser@... [CZsynth] wrote:


Does anyone have any idea where to actually put a replacement light?My understanding is that retro equipment used an inverter which is used in 'foil' displays: I have access to a couple of LED flat lights,but slipping them behind the LCD causes no light through the LCD.An online article suggested the display needed the backing removing before the light would shine through.Has anyone any experience of altering backlights?