
Upgrading the VAX 4000 Model 100A System
3.5 Installing the CPU Module
3. Remove the upper and lower drive mounting shelves together as a single
unit (it is not necessary to disassemble the shelves themselves). Unscrew
all six screws from the shelves, leaving the topmost captive screw until
last for support. Leave the capitve screws in position and save the Phillips
screws for reinstallation of the shelves (see Figure 3–3).
Figure 3–3 Unscrewing the Drive Shelves
1
3
2
MLO-012302
Topmost captive screw
Other captive screws
Phillips screws
3–6 Upgrading the VAX 4000 Model 100A System