Service manual

3. DIAGNOSTIC CHECK
3.46 Service Manual BSM-4100
• CHECK: Displays the check result, i.e. “OK” or “ERROR”. When the
CALCULATED SUM data is same as the SUM data, “OK” appears.
• SUM: The sum data of the program data stored in the ROM
• CALCULATED SUM: The sum data calculated from the program data in the
ROM
3. Touch the “SYSTEM RAM CHECK” key on the screen. The CPU of the
network card checks the system RAM in the CPU by writing the check data as
a pattern and reading the stored check data and comparing the written data
with the read data. If an error is found, the host CPU on the MAIN board
displays the address at the error occurrence, written data and read data on the
following screen.
4. Touch the “COMMON RAM CHECK BY CARD” key on the screen. The CPU
of the network card checks the common memory of the network card. The host
CPU on the MAIN board receives the check result and displays it on the
screen. If an error is found, the host CPU displays the address at the error
occurrence, written data and read data on the following screen.