How can I open the keyboard of sharp cash register xe-a 102 to clean it as keys not working

SOURCE: how do you reset sharp xe-a302 cash register to factory defaults

Hi.
I would not recommend doing this unless you are certain that it is the cause. I have never had memory corruption in this series before, so I would strongly suggest it is being caused by another factor such as spillage in the keyboard.
Can you tell me exactly which buttons are showing the problem and what happens when you press them. Can you still make sales with the product buttons?

Mark

SOURCE: sharp xe a201 has an e.3.2 error,

Hello, my name is Curtis, and I am a Sharp Customer Service Rep. What you are going to want to do first is press the CL on the grey keys, then the ESC in the bottom left corner twice, (CL ESC ESC.) Then on the grey keys type in the clerk number (01) and press that blue, CLK# key above the department keys, the screen should read -01- from there you should be able to press the CA/AT/NS key and the drawer will open and you will be ready to go. However if there is any problems doing this please contact our support line at 1-800-237-4277, we are open every day of the year till 7:00 PM central time. Hope this works for you!

SOURCE: sharp cash register XE A202

finally solved this problem...yeah

first press CL
then ESC then ESC
then 1 (grey button)
then CLK#

after this step your screen will show - 01 -
now your register is ready to go..

good luck.

SOURCE: Sharp XE-A203 Cash register Error message 3.2

You have logged yourself out of the machine. Press CL then 1 then CLK# or CASH#

SOURCE: Program Sharp XE-A21S Cash Register

how do I fix error E32 on cash sharp resgister XE-A21S?