Service manual

3. DIAGNOSTIC CHECK
3.40 Service Manual BSM-4100
DPU ROM Check
This item checks the ROMs on the DPU board by the CRC (cyclic redundancy
check) technique. This check assigns a count number when one set of checks is
successfully completed.
If an error message appears, the DPU board will be faulty.
Procedure to Start and Exit the DPU ROM Check Program
1. To select the DPU ROM Check, touch the “ROM CHECK” key at the DPU
CHECK column.
2. The instrument repeats the check and increments the pass count until you
touch the “RETURN” key.
3. If the check program finds an error, it displays the “ERROR” message on the
screen.
4. To return to the MANUAL CHECK MENU screen at any time, touch the
“RETURN” key.