CFAG19264A replacement for LM19264K

N

Navid

New member
recently I've got CFAG19264A-YYH-TN and I try to use it instead of my old LCD LM19264K, I check all pinout and spec it was ok but when I put it in the board it does not show anything just green light. As I found the old LCD controller is S6B0108 and when I compared the datasheet with new LCD controller(NT7108) also was same.

am I wrong ? or there is some point that I don't know?. would you please advice me how to solve!


old LCD : https://www.topwaydisplay.com/en/product/mono/LM19264K-4
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C

CF Kelsey

Administrator
Staff member
Have you tried adjusting Vo the supply voltage for the LCD? That pin controls the contrast. It should be attached to a variable resistor to allow for contrast tuning

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N

Navid

New member
Thank for your comment I checked that but still didn't show anything even glitch just dark and lighter the foreground. Also there is VR on lcd back side shall I adjust it?
For information I checked the board by old LCD it showed something means board is OK and I measured all pin voltage all was almost same except pin 19(new LCD-5 but old LCD is -10)
 

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N

Navid

New member
Hi,
Finally I found the point, in the old LCD the CS1, CS2, CS3 are active low which had not been mentioned in its data sheet. Now I face new problem, is there any way to make it same on New LCD? In other word is there any jumper setting on New LCD to make CS active low?
 
C

CF Kelsey

Administrator
Staff member
I don't have one of these to test it on, but it does look like you could move the 0ohm resistor on JF2 from the H side to the L side to make this change. It will take a few days for me to confirm this. Let me know if you try it and whether it works!
 
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