Before you perform the procedures in this chapter, be sure that you have read
and performed the procedures in Chapter 1.
Caution - Do not touch the components on the boards or any metal parts.
Wear a grounding strap when handling the boards. Do not disconnect the
power cord from the system unit's power receptacle. The power cord should
be left plugged in to a grounded power outlet. This connection provides the
ground path necessary so that you can safely remove and install printed circuit
boards and other components. Be sure that the system unit's power is turned
off by observing that the green light-emitting diode (LED) at the front of the
chassis is not lit and the fan in the power supply is not running.
1. Remove the sheetmetal protector plate for SBus slot 1 from the inner
surface of the back panel of the system unit.
From the inside surface of the system unit, press up on the two clips at the
bottom of the protector plate to release the plate from the mounting tabs.
As shown in the above illustration, remove the plate that is closest to the fan
grill.
2. Connect the flex-circuit cable connector (J0101) to the memory connector
(J0705) on the main-logic board.
See Figures 2-1 and 2-2.
Note - If the memory connector (J0705) does not have a plastic shroud around
it, be sure to install the flex-circuit cable (J0101) so that all pins of the main-
logic board memory connector (J0705) are connected and covered. You must
not see any exposed pins on J0705.
Figure 2-1
Flex-circuit Cable
Figure 2-2
Connecting the Flex-circuit Cable (J0101) to
the Main-logic Board (J0705)
3. Slide the primary memory board at an angle into the back panel of the
system unit.
Make sure that the mounting plate on the primary memory board hooks
into the holes on the back panel of the system unit.
The mounting holes are above the rectangular opening in the back panel.
See Figure 2-3.
4. Lower the board towards SBus slot 1 as shown in Figure 2-3.
Figure 2-1
Installing a Board in SBus Slot 1
5. When the board is close enough to the SBus slot to permit, plug the
remaining connector of the flex-circuit cable (J0102) to the shrouded
connector (J401) on the primary memory board.
See Figures 2-1 and 2-4.
Figure 2-2
Connecting the Flex-circuit Cable (J0102) to
the Primary Memory Board (J401)
6. Align the board's SBus connector with the main-logic board's SBus
socket.
7. Press the board toward the rear of the system unit.
8. Gently press the plug into the socket.
Caution - Using excessive force may bend or damage the pins. The plastic
board retainer is not a handle. Pressing on the retainer can cause it to break.
9. Turn the system unit power on, and check for proper operation of the
system unit and the installed primary memory board.
See Chapter 5.
If you are also installing a secondary memory board:
a. Turn the system unit power off.
b. Skip step 10 (below) and begin reading Chapter 3.
10. Replace the cover of your system unit.
If you are not sure how this is done, see Appendix C, "Replacing the System
Cover."
