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Some information about Fx991's LCD is required

fx991 LCD Asking for help

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#1 Heinrich-Frederica

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Posted 10 September 2021 - 12:36 PM

Hello I'm a high school student from CN(also an electron amateur).I'd like to do some interesting experiment with the LCD display of Casio Fx991(DE or CN).Is there any resources like datasheet or basic logic of it?
I've known that it seems 13 of its 34 wire is associated with the display of the screen,but it is hard for me to test the function of every wire.If someone have some information,please post here.Thank you

#2 ijabbott63

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Posted 10 September 2021 - 05:15 PM

The fx-991 designation covers a number of calculators from different series, so you need to be more specific.

 (EDIT: I've just noticed the fx-991CNX in your profile, so I guess you mean the ClassWiz series.)

 

Also, the fx-83 model from the same series will use the same display and should be less expensive.


Edited by ijabbott63, 10 September 2021 - 05:20 PM.


#3 Heinrich-Frederica

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Posted 11 September 2021 - 07:41 AM

The fx-991 designation covers a number of calculators from different series, so you need to be more specific.
 (EDIT: I've just noticed the fx-991CNX in your profile, so I guess you mean the ClassWiz series.)
 
Also, the fx-83 model from the same series will use the same display and should be less expensive.


Thanks for your advice,since nearly all of my classmates are using 991 of ClassWiz series,I have got 3 calculators at a low price (one's screen is cracked and other two have liquid crystal leakage in different degree) to continue my experiment.





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