Specifications

40 Application Module
X
Service 3/96
Honeywell Inc.
Hardware Description of Coprocessor
4.4 WSI2 Board Replacement
4.4 WSI2 Board Replacement
Overview
Node power must be turned off for the purpose of changing circuit boards
in the A
X
M node.
Locating
shutdown
procedure
Software shutdown procedures for both the A
X
M coprocessor and node
processor are documented in the Application Module
X
System
Administration manual.
WSI2 Board
Replacement
Procedure
W
W
A
A
R
R
N
N
I
I
N
N
G
G
Damage Can Result—Circuit board damage can result if
you do not practice proper ESD procedures or attempt to
remove/insert a circuit board with node power applied.
CAUTION
Mandatory Steps—It is mandatory that appropriate software
shutdown procedures are followed for the A
X
M coprocessor
prior to removing power from the A
X
M node.
Failure to do so can cause damage to the HP-UX file
structure on the coprocessor hard disk.
ATTENTION
It is also highly recommended that you perform a node
processor software shutdown when preparing to power off
the A
X
M node. This provides for an orderly departure from the
LCN network.
Table 4-3 WSI2 Board Replacement Procedure
Step Action
1 Turn off the power using the switch on the node
power supply.
2 Disconnect the SCSI interface cable from the
coprocessor free edge. (It runs between the WSI2
and the drive tray above it.) This may require removal
of an additional cable to gain access (PIN interface).
Note the position of both cables as you remove them.
3 Remove the WSI2 assembly by using the extraction/
insertion levers.
4 Verify that the replacement WSI2 assembly pinning
matches the existing board.