Service manual

Performance Verification
2-7
Table 2-7 ROM Replacement Part Numbers for PageWriter Cardiographs M1772A Serial Number
Prefix CNA, CNB, or CNC,3807A or earlier
Table 2-8 ROM Replacement Part Numbers for PageWriter Cardiographs M1772A Serial Number
Prefix CND
If ROM-1 is defective, it is unlikely this test or any other cardiograph function will
operate.
Random-Access Memory (test 5) . The RAM test performs a read/write test of the
instrument’s memory. If this subsystem is defective, it is unlikely this test or any other
cardiograph functions will operate. The RAM is identified on the report as
•RAM
Test ROM Part Number
ROM 1
U205 - Main CPU Board M1770-89505
ROM 2 Not Required
ROM X1 U9 - Interface Board M2488-17901
ROM X2 U10 - Interface Board M2488-17902
Test ROM Part Number
ROM 1
ROM 2
U205 - Main CPU Board M1770-89550
ROM X1 U9 - Interface Board M2488-17901
ROM X2 U10 - Interface Board M2488-17902
NOTE