Owner`s manual

DRAFT
Upgrading a VAX 6000 system with KA66A modules requires some checking
to ensure that the system supplies the +3.3V power needed by the KA66A
processor. The best way to tell involves opening the rear cabinet door and
examining the system. Three cases are possible:
1
The system has an H7242 power regulator. This regulator supplies
+3.3V power, and you can upgrade the system without concern for
changing the power supply.
2
The system does not have an H7242 power regulator, but does have an
H9657-CX kit installed. To see, loosen the six screws holding the I/O
panel in place, lower the I/O panel, and see if a blue bus bar has been
installed on the XMI backplane. If so, the system will deliver +3.3V
power to up to 4 KA66A modules, and you can upgrade the system
accordingly.
3
The system does not have an H7242 power regulator nor an H9657-CX
kit installed. In this case, you need to upgrade the system with either
an H9657-CX kit or an H9657-CU kit, as described in Section 1.2.
Introduction 1–3