Service manual

Performance Verification
2-5
If your cardiograph is equipped with Options #A05 or #A10, do not turn it off during Test
C or D. If you turn off the cardiograph while Test C or D are in process, you could lose
stored ECGs, the Log of ECGs Stored, or the Log of ECGs Taken.
When the tests are completed, the results are printed out in a pass/fail format on the left-
hand side of the first page of the test report.
In some cases, a test failure halts the test/test printout and an error code indicating the
failure appears on the display. See Chapter 4, “Troubleshooting,” for a list of self-test
failure codes and failure symptoms.
Memory Test
This test looks for failures in the following memory subsystems:
• Read-Only Memory (ROM)
• Random Access Memory (RAM)
• Non-Volatile Random Access Memory (NVRAM)
Read-Only Memory (tests 1-4) . The cardiograph is designed to have up to four ROMs
installed, two on the main control board and two on an option board. The Read-Only
Memory test reads the contents and performs a 32-bit cyclic redundancy check (CRC) of
each of the four ROM address spaces. The test of a ROM address space will fail if the
ROM module is faulty or is not present. The four ROM address spaces are identified on
the report as
•ROM-1
•ROM-2
•ROM-X1
•ROM-X2
Depending on the serial number and model of the unit you are servicing, the
corresponding ROM part numbers vary. Refer to tables 2-5, 2-6, 2-7, and 2-8 for the
correct ROM replacement part numbers.
CAUTION
Table 2-4 Test Results Format
Test Passes Test Fails
Printed Result OK **