Hard Check Function; Display, Ram, Drawer And Printer Check - Casio CE-2400 Service Manual

4-4. Hard check function

Enter 1 digit from numeral key and press the sub total button (ST), the following Hard check function
will be executed.
1 +
(1)
5 +
(2)
7 +
(3)
8 +
(4)
9 +
(5)

4-4-1. Display, RAM, drawer and printer check

Operation :
(1) All segments turn on.
8 8
(2) Date and time set
Set the following data in the machine automatically.
Date :
Time :
(3) RAM write and read check
The machine writes data into RAM and read out the data to compare with written data.
When this check is finished correctly, the machine goes to check No. (4).
However, if an error is occurred, the machine sounds an error tone, prints the error receipt,
and stops Hard check program.
Error receipt sample
(4) Drawer open check
Open the drawer.
(5) Printing check
Print the following character.
Z 0 0 0 0 0 0 0 0 0 CA CD
ST
: Display, RAM, Drawer, Printer check
ST
: RAM read only check
ST
: Voltage check of memory back-up battery
ST
: Print all characters
ST
: Display the time
1 + ST
8 8 8. 8.
1st. January 1992
12 : 34 : 00
" -- --
— 5 —
8. 8.
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