I need help with the LCD in the attached picture. There is no numbers at all on the LCD. This board is off of a pool heater control and the LCD is gone. The board name is Raypak RP2100 RP 2.1 P/N 601588 The board is 24vac. The board itself is good but I need to replace the LCD. All I can tell you about the LCD itself is that it is 51mm x 30mm and it has 25 pins (13/12) with a backlight under it. I have looked on Mouser Electronics but can't find the correct LCD. Any and all help will be appreciated.

 

Many of these displays are very custom to the specific item. One way to tell is if there is any symbol besides the seven segments for a number or a decimal point.

Anything else... it's custom and probably not available.

 

Considering the number of leads, it might be a graphical display. Can you tell us what images the LCD displayed?

 

Looks a bit like one of the old 3&1/2 digit LCDs;

but with less pins so yours might be a 2 digit or 2&1/2 digit one.

They have no inbuilt driver IC, there is one pin for each segment, and a number of "common" pins.

 

I know there was a symbol or picture of a flame when the heater was in operation. So, it is more than just numbers.

 

Ah, well then it's a specialty device and you'll never find one unless you can get a direct replacement from another PCB or from the pool heater manufacturer. Normally they get custom displays made in X quantity, to suit their own product, and use them for batch manufacturing.

There's very little chance those displays would be available elsewhere.

 

Can you trace the pins back to the driver ic what number is on it, the display is probably an Alpha numeric type with symbols, specific made.