Electronics > Repair
LCD or OLED retrofit for PM6690 / FCA3000 / CNT-90 frequency counter
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Smile2016:
Does anyone have info, solution or ideas on an LCD or OLED retrofit for PM6690 frequency counter? The original display is a 320x97 pixel graphical LCD with an LED backlight, model TM32097AGFG.
coromonadalix:
https://www.eevblog.com/forum/testgear/new-display-for-pendulum-cnt-90-counter/

its a 320*97 pixels  lcd,  but no one so far has the right substitute ... some saw a few things  with a 320*64 ...   but for sure misses 33 lines ...
picburner:
Or use a 320x128 display leaving two unused black bands above and below, provided that the dimensions of the new display are compatible.
In addition, you need to interpose a micro or an FPGA that converts the signals from the old display to the new one: in short, a lot of work.
coromonadalix:
you have to check in the service manual  for the pinout ...  cant find anything on this model ... ?
Smile2016:
The schematics can be found at this link. https://assets.fluke.com/manuals/6690____smeng0000.pdf . I’m curious if anyone has already put in the time and effort to create something similar. The biggest challenge is finding a display that fits mechanically in the available space. I agree that an FPGA or MCU might be necessary, along with extensive data capture experiments. It’s unlikely to find a display with the same driver chip, which is currently unknown...
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