AT&T 3B2 Maintenance Reference Manual page 154

Version 2
1/0 Backplane
The
1/0
backplane is situated on top of the left side of the system board. It is attached to the
system board by two edge card connectors (one 100-pin and one 60-pin). The 1/0 backplane is
mounted parallel to the side of the cabinet and is attached to the apparatus cage that houses
the expansion cards. The apparatus cage is held down with two screws in the front, one on
the left side toward the rear, and one through the back of the cabinet at the right rear comer
(two through the back on the Model 400). Figure 6-6 shows how to remove the Model 300 and
310 apparatus cage.
SCREW
RAM CARD
CONNECTORS
SCREW
DOD
DODOO
000000°
00
DOD
ooo
D
'f~SCREW
I
!
FEATURE
CARD
CAGE
ASSEMBLY
BATTERY
Figure 6--6. Removing the Model 300/310 apparatus cage
6-14 AT&T 382 Computer Maintenance Reference Manual