Digital Equipment VAXstation 3100 Maintenance Manual page 167

146 Expansion Boxes
18. Install the new module by reversing the previous procedure.
19. The jumpers on the new module do not have to be set. Check the new
module to be sure the jumpers are set to the same position as on the old
module you just removed.
20. Reinstall the RZ55 into the expansion box.
6.1.3.2 RZ55 Expansion Box SCSI ID Switch Board
The SCSI ID switch board is on the inside back wall of the RZSS expansion
box. It contains two switch packs. Only one is on the RZ55 expansion box,
and connects to the smaller connector on the RZ55 drive by way of a cable.
Follow this procedure to remove the switch board and reverse the procedure
to install it.
1. Switch off power to the expansion box.
2. Unscrew the four cover screws and remove the expansion box cover
(Figure 6-5).
3. Remove the three screws (Figure 6-6).
4. Lift the shield up, disconnect the power cable, and remove the shield (with
the resistor load board) from the expansion box.
5. Disconnect the cable from the SCSI ID switch board (Figure 6-12).
Figure 6-12 RZ55 Expansion Box SCSI ID Switch Board
6. Remove the two screws from the board and remove the board from the
expansion box.