Ram Read Only Check; Voltage Check Of Memory Back-Up Battery - Casio CE-2400 Service Manual

(6) Receipt issue
The following receipt is issued.
Z 0 0 0 0 0 0 0 0 0 CA CD
(7) Test display
7 6

4-4-2. RAM read only check

5
Operation :
Note: Be sure to execute the RAM write and read check (1 + ST) before this check.
The machine reads out the data to compare with written data until an error is occurred and
blinks " -- " on the display during this check.
To stop this check, turn the mode switch to OFF position.
If an error is occurred, the machine sounds an error tone, prints " -- --
receipt, and stops this check.

4-4-3. Voltage check of memory back-up battery

7
Operation :
Display the voltage of back-up battery in real time. (Measurement is Volt (V) level.)
To stop this check, turn the mode switch to OFF position.
0 1 • 0 1 • 9 2
4 5 1 2 : 3 4
No 0 0 0 4
5 4 3 2.
+ ST
+ ST
— 6 —
1 0
" on the