I have a set of electronic scales for repair- they are for calibrating the output from a farm air-seeder, but are really little more than glorified bathroom scales.
The display is a 6 (or 5 1/2) digit LCD display with one small text of 'Zero' to indicate when the load cell is within a zero band.
All of the 7-segment characters have the 'e' and 'c' segments missing.
The LCD has 20 x 0.1" pitch lead-outs from 'clips' that contact the deposited conductive tracks. These clips are sealed under some type of clear compound.
I have very little experience with LCD displays other than the usual cleaning and re-seating of zebra strips.
Is this failure indicative of a display failure or a drive circuit failure? The driver is a uPD7225.
I dived in with a scope, with happy memories of multiplexed LED 7-segment displays, and was a bit baffled by the stepped waveforms that I found.
I got an informative document- EFM32 LCD Driver - AN0057 - Application Note - Silicon Labs - which was very enlightening, but before I go further I wonder if anyone has any guidance as to the best way to approach this.
I don't suppose that I will find a replacement LCD, but the drive IC is available.
Regards, BT