Digital Equipment DEC 3000 Series Service Information page 215

Step Action
7 Disconnect the lower
TURBOchannel cables and all
I/O cables from the rear of the
chassis.
8 Remove the lower
TURBOchannel options. See
Section 9.10.5.
9 Perform as much of the I/O
board removal procedure as
necessary to disconnect the I/O
board connector from the system
board. See Section 9.12.1.
10 Disconnect the three power
connectors
connector
front edge of the system board.
11 Release the locking mechanisms
and lower the chassis to allow
access to the top of the chassis.
12 Disconnect the upper
TURBOchannel cables from
the rear of the chassis.
13 Remove the upper
TURBOchannel options. See
Section 9.10.3.
14 Remove the impingement fan
assembly. See Section 9.13.5.
15 Remove the memory
motherboards (MMBs). See
Section 9.14.2.
Do not remove the SIMMs from the memory
motherboards.
16 Disconnect the 3.45 volt sense
line from the top front edge of the
system board.
17 Release the five captive rivets
that secure the system board to
the chassis.
Removal and Replacement Procedures
and the LSM
from the bottom
Note
Refer to Figure 9–23
through Figure 9–25
Figure 9–24
–
–
Figure 9–23
–
Figure 9–24
–
–
–
Figure 9–23
Figure 9–25
9–37