Replacing The A2 Cpu Board Assembly; Replaceable Assembly List - Agilent Technologies 4349B Service Manual

Replacing the A2 CPU Board Assembly

The A2 CPU Board Assembly has a ROM for the rmware and an EEPROM for the adjustment
data and user data. Both ROM and EEPROM are mounted in sockets for easy replacement. If
the A2 assembly is replaced, the ROM and EEPROM may be transferred from the defective
assembly to the new assembly as long as the ROM and EEPROM are not defective. The
ROM transfer reduces parts cost for the repair, and the EEPROM transfer saves time from
readjusting the 4349B. For this purpose, the A2 assembly can only be ordered without the
ROM.
When the A2 assembly is replaced, make sure that the jumpers and switches on the A2
assembly are in the default position as shown in Appendix B.

Replaceable Assembly List

The replaceable electrical assemblies are listed in Table 3-1 and Table 3-3.
3-2 Assembly Replacement