Using an LCD display in replacement of a defective VFD

[Z. Khalid]

Hello there!

I’m considering using the LCD with the part number ACM4002E-FL-YBW from AZ Displays to supersede the vacuum fluorescent display M402SD10fj from Futaba. Please refer to the attached data sheets..

The mode of operation of the VFD is Motorola M68-type parallel mode.

Are there any modifications related to the working assembly/LCD (rather than supplying the pins 3, 15 and 16 of the LCD with the appropriate voltages) shall to be taken into consideration?

[coromonadalix]

normally  if you are in the same controller series,  the character table should be fine  say HD44780 or KS00065B  ... ST 7066

yes pin 3  on some model may need an negative voltage,  some contrats is a pot going to ground  for a full contrast,  no negative voltage needed   etc  ... depend of the model

some have the needed stuuf already on the pcb ...

the backlight,   some are led is 5vdc  and other are high voltage ...  fluorescent something loll    damn  its late  cant recall  loll

i dont see the one on the futaba

[coromonadalix]

https://www.ebay.com/itm/195935049078?
https://www.ebay.com/itm/134088189740?

yes  one of them is a shipping disaster  ....  i would contact the sell to have a real price, not a scam like this



the other problems could be size, and compatibility,  since the futaba has serial parallel mode

better buy another identical one from the link,   you could need some trick or add another mcu to do signal conversion etc ...  maybe not worth it ??

[Z. Khalid]

Thank you for your reply..

- M402SD10fj module has HT16514 controller/driver whereas ACM4002E-FL-YBW uses KS0066 (or equivalent as stated in the data sheet).

- Unlike LCDs, vacuum fluorescent displays don't require backlighting.

- I've already ordered some of M402SD10fj from eBay. Unfortunately it needs a long time to be shipped from the US to the Middle East..