Casio SF-7900E Service Manual & Parts List page 20

4. ROM/Clock check
MENU MEMORY
1 : CHECK–SUM
2 : SPECIFIC ADDR
3 : TIME DISPLAY
4 :
5 :
CASIO 1993. 11. 09
1) Check sum
CHECKSUM CALC
TP SZ
C0 O 256
CASIO 1993. 11. 09
2) Specific address
SPECIFIC ADDR
TP SZ
D0 O 256
CASIO 1993. 11. 09
5. Key/Buzzer check
MENU KEY / BZR
1 : RANDOM
2 : COMPULSORY
3 : BEEP
4 : ALARM NOTE 1
5 : ALARM NOTE 2
CASIO 1993. 11. 09
3)
SUM XOR
XXXX XX
Input can be made in the line which
shows "x" using the numeric keys.
Entry of 12 or more digits sets the time
and date. Entry of 4 or 6 digits sets the
daily alarm. The ON key clears cur-
rent entries.
SUM XOR
XXXX XX
RANDOM :
The 'key code' will be displayed.
The 'key code' is numbered incrementally from
left to right with the DATE key as "00", and
the left cursor key is "40". To release this test, press
COMPULSORY :
Limits the mode mentioned above so that the
keys must be pressed according to the key code.
If an error is made, a buzzer sounds for about 1
second. (A correct entry results in a beep tone.)
BEEP
ALARM NOTE 1
ALARM NOTE 2
— 18 —
CHECK-SUM : Call up check sum and XOR
values for connected ROM.
SPECIFIC ADDR : Call up check sum for certain
address.
TIME DISPLAY : Bring up clock display. The
present time, date and daily
alarm can be set.
Time display
TIME DISPLAY
1990-03-00
10:10 00
XXXXXXXXXXXXXXX
CASIO 1993. 11. 09
HOME/WORLD key as "34" etc. Accordingly,
SEARCH key.
: Key input sound every 1 second
: Sound alarm 1
: Sound alarm 2