7-26      Removal and Replacement
Figure 7-21  S1 Switch Settings
HP-HSC I/O Card
The following applies to 2, 4, and Dual Bus 4-slot HSC Expansion I/O cards.
Removal: Refer to Figure 7-22
1. Remove the HP-HSC Expansion I/O card.
2. Loosen the two (one on each side) captive mounting screws on the expansion I/O card bulkhead.
3. Pull the back of the HP-HSC I/O card up, disconnecting it from the HP-HSC Expansion I/O card con-
nector (1).
4. Continue to lift the back of the HP-HSC I/O card until angled enough to dis-engage the hooked tabs 
from the mounting slots in the bulkhead.