Data General AViiON 5000 Series, Customer Documentation

Page: 69 / 210

Configuring VME Option Boards
2-35
014–001867
Differential orientation
Single-ended orientation
S.E.
SCSI connectors
Figure 2–14 VSA Board with Daughter Boards Oriented for Differential and
Single-Ended Operation
Changing the Orientation of a Daughter Board
To change the orientation of a daughter board from single-ended to differential or
vice-versa, follow these steps:
1. Read the instructions on avoiding ESD damage, earlier in this document, and
set up an ESD kit.
2. Putting your fingers under the edges of the daughter board, and being careful
not to bend the pins on the underside of the board, carefully pry up one side of
the board just until it comes loose.
3. Again using your fingers, pry up the other side of the daughter board until it
comes loose.
4. Lift the daughter board from the mother board and rotate it 180
°
, so that the
corner reading S.E. or DIFF, whichever orientation you want, is closest to the
SCSI connector.
5. Carefully align the pins on the daughter board with the connectors on the
mother board, as shown in Figure 2–15.
NOTE: Before proceeding to step 6, carefully inspect the boards from all sides
to be sure that the pins are aligned correctly.