Owner`s manual

To install the H9657-CX components, you should:
1. Perform an orderly shutdown of the operating system.
2. Turn the upper key switch on the front control panel to the 0 (Off)
position.
3. Open the front and rear doors.
4. At the rear of the cabinet, pull the circuit breaker on the AC power
controller to the Off position. The AC power controller is at the bottom
rear of the cabinet.
5. Unplug the system power cord.
WARNING: Wait at least 2 minutes after unplugging the system before
touching any components of the machine. Voltage discharges slowly and
can hurt you if you touch some of the components. Damage can also
occur to the modules.
6. At the front of the system, remove the clear plastic door in front of the
XMI cage.
CAUTION: Always wear an antistatic wrist strap before handling XMI
modules.
7. Remove the old processor (and memory) modules and put them in ESD
boxes. (See Chapter 5 for module handling procedures.)
8. At the rear of the cabinet, lower the I/O tray to gain access to the back
of the XMI.
9. Loosen the four screws on the +5V rail at the upper left of the XMI card
cage and slide the left part of the bus bar under the four screws. (See
in Figure 4–3.)
10. Install the connectors at the bottom of the bus bar into slot 2 segments
D and E. (See .)
11. Using a large Phillips screwdriver, screw the right portion of the new
bus bar onto the +3V rail using the four screws in the kit. Position the
bus bar so that the screws go in the four holes at the far right of the
rail. (See .)
12. With the bus bar in place, tighten the four screws on the +5V rail.
Torque the screws to 9 (+/-1.8) inch-pounds.
13. Fold up the I/O tray to its original position. Close the rear cabinet door.
Installing the H9657-CX Kit 4–7