Casio SF-7900E Service Manual & Parts List page 19

3. RAM check
MENU RAM
1 : DATE WRITE
2 : DATA READ
3 : PAT. CHANGE
4 :
5 :
CASIO 1993. 11. 09
#1---Test data pattern(00,01,02...)
#2---Test data pattern(FF,FE,FD....)
1) RAM write
The unit will beep after a second.
The menu will be appeared.
RAM WRITING
NOW EXECUTING!
CASIO 1993. 11. 09
It means RAM write is succeeded.
2) RAM read
Normal end display is;
RAM COMPARE
COMPLETE!
CASIO 1993. 11. 09
DISP CHNG key
#1
DATA WRITE
DATA READ
PAT. CHANGE
#1
Error end display is;
#1
RAM COMPARE
DATA ERROR!
ADDRESS
XXXX
CASIO 1993. 11. 09
To escape from this message, press DISP CHNG
key.
— 17 —
:Return to menu
: Write the set pattern to the RAM area
: Compare the pattern displayed after # with
the write data of RAM and displays the
results.
: Change the test data pattern.
#1
CORR RAM
XX XX