Casio BN-10 Service Manual & Parts List page 34

6 SRAM READ CHECK
Press ESC, then 5 button. The following display appears.
SRAM CHECK
(128K)= OK
7
FLASH CROSS BIT CHECK
Press ESC, then 6 button. The following display appears.
FLASH CHECK
(CS5)= 1M
NGF5
(CS4)= 1M
NGF4
"(CS4)= NC" is displayed in stead of "(CS4)= 1M" with BN-10.
And "NGF4" is not displayed with BN-10 also.
8 FLASH CROSS BIT CHECK F
The flash ROM LSI304 (306) is formatted at first, and then the data for this check are written into
LSI304 (306). Next, these data are read from LSI304 (306).
Press ESC, then 7 button. The following display appears.
FLASH CHECK
(CS5)= 1M
OKF5 OKW5 OKR5
(CS4)= 1M
OKF4 OKW4 OKR4
OKW5 (4) indicates that the data for this check could be written into LSI304 (306) without prob-
lems.
NGW5 (4) indicates that the data for this check could not be written into LSI304 (306).
OKR5 (4) indicates that these data could be read from LSI304 (306) without problems.
NGR5 (4) indicates that these data could not be read from LSI304 (306).
"(CS4)= NC" is displayed in stead of "(CS)= 1M" with BN-10.
"OKF4 OKW4 OKR4" is not displayed with BN-10 also.
9 Press ESC button twice. Doing so, TEST MENU display appears.
5-2-3. FLASH CHECK
It is unnecessary to perform this check because the operation of flash ROM LSI304 (306) can be
checked using 5-5-2. MEMORY CHECK described above.
5-2-4. KEY CHECK
1 Pressing 4 button, the following KEY MENU display appears.
# # # KEY CHECK # # #
1 AUTO KEY CHECK
2 RANDOM KEY CHECK
XXXXXXXX
BANKXX
XXXXXXXX
BANKXX
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