One last question. 

The elastomeric or "Zebra" connectors for re-attaching the LCD panel... That is the part that is giving me the "heebee-jeebees," so to speak! I read many internet posts and spoke to friends who have fixed calculators and alarm clocks with these connectors and I understand many a times you could end up losing digits or entire segments of the display if the connection is not tight. One person said he wiped the connector surfaces with isopropylene alcohol and that made things worse. Any good reading on this about what to do?

Many thanks

toptip wrote:

One last question. 

The elastomeric or "Zebra" connectors for re-attaching the LCD panel... That is the part that is giving me the "heebee-jeebees," so to speak! I read many internet posts and spoke to friends who have fixed calculators and alarm clocks with these connectors and I understand many a times you could end up losing digits or entire segments of the display if the connection is not tight. One person said he wiped the connector surfaces with isopropylene alcohol and that made things worse. Any good reading on this about what to do?

Many thanks

The best way is to do some measurements of the location of the 2 connectors. Measure the distance each of them are from the edge of the PCB, or take a good picture of it before removing the LCD.

Dont clean with anything, just remove at replace them and test. If pixels are missing, then remove LCD again, and move the connectors a bit and try again. Nothing will die forever, it is just a matter of testing and moving until display is fine again.

You can test without connecting keyboard and glass. Just connect power to battery and see if the display looks good. If all text is fine, assemble and do final test.

/Weebyx

Thank you. Will try and report. Waiting for this to arrive:

https://www.adafruit.com/product/625

I was reading that cutting these to size may reduce their life due to oxidation and other contamination. I thought maybe I should apply something like clear nail polish just to the edge to prevent that from happening.

toptip wrote:

Thank you. Will try and report. Waiting for this to arrive:

https://www.adafruit.com/product/625

I was reading that cutting these to size may reduce their life due to oxidation and other contamination. I thought maybe I should apply something like clear nail polish just to the edge to prevent that from happening.

I have not yet seen any problems with cutting them, but... I hope it glows more white than it appears on the screen. The LCD is blue itself, so with blue background light, the text will be blue on blue.

/Weebyx

It looks very nice. Where is rest of this diagram???  Very important.  Thank You....

Nice wiring diagram but where is the rest of this diagram???  Thank You

Hello,,  can You send bigger part of this wiring diagram?>??   Thank You