K5synth

I have.  

The main issue with an LCD is setting its viewing angle.  If you look at a properly-set-up LCD dead-on, the letters will be black and the background will be white.  But if you look at it from a (say) 45 degrees angle from above, the letters will be washed-out white; and from a 45 degree angle from below, the background will be washed-out black -- your situation.

The viewing angle is normally set via a voltage value, likely between 0 and 5V.  The K5M has a "contrast" knob on the front which is attached to a potentiometer which lets you change this voltage value; but it may not be enough.  You may have to set up a little voltage divider -- basically soldering in two resistors of the right resistance -- to adjust the contrast so that the middle position of the contrast knob corresponds with dead-on properly viewed letters.

Building a voltage divider requires a bit of electronical engineering knowhow; I lucked out in getting a colleague of mine to run the math for me to figure out the right values (I had bought an LCD from Mo Morgan (lightsforsynths@...) but it wasn't adjusted right as well).  Afterwards my LCD looked great.

Sean

> On Sep 12, 2019, at 3:57 PM, nebelfuerst@... [k5synth] <k5synth@yahoogroups.com> wrote:
> 
> 
> As my backlight is dead, I tried to avoid disassembling the LCD by buying a replacement LCD.
> 
> I read somewhere, that the type should be compatible with T6963C.
> 
> So I bought this one:
> 
> https://www.ebay.de/itm/Powertip-LCD-Grafik-Display-24064-GLCD-240-64-PG24064E-PD-T6963C-1-Stück/311819406726?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649
> 
> 
> 
> I connected everything except the 100V. The display became black, without any letters visible.
> 
> Did anyone replace the complete LCD yet ?
> 
> 
> 
> 
>