Service manual

3. DIAGNOSTIC CHECK
Service Manual BSM-4100 3.11
RAM Check
This item checks the RAM on the MAIN board by comparing the test patterns it
first wrote to the RAM with the test patterns it later read from the RAM. This test
uses 15 test patterns and assigns a count number when a comparison of the 15 test
patterns is successfully completed. The comparison of all the test patterns in this
check takes about 4 minutes.
This check deletes the patient data. If an error message appears, the MAIN board
will be faulty.
Procedure to Start, Stop, and Exit the RAM Check Program
1. To select the RAM Check, touch the “RAM CHECK” key. The instrument
automatically starts the RAM check.
2. The instrument repeats the check and increments the pass count until the
operator touches the “RETURN” key.
3. If the check program finds an error, it displays the address, write data and read
data as shown in the above table.
4. To stop the check temporarily, touch the “STOP” key. The “START” key name
changes to normal and the “STOP” key is highlighted.
To continue the check, touch the “START” key again.
5. To return to the MANUAL CHECK MENU screen at any time, touch the
“RETURN” key.