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235-200-150
January 2006
Replace System Unit ( Netra
4.6
OVERVIEW
This procedure is used to replace the Administrative Workstation (AW). Before
replacing the AW, preliminary checks should be performed to ensure that the cause of
failure has not resulted from power becoming unavailable to the unit, the power
switch inadvertently placed to the off position, or the failure of a peripheral (Ethernet
Serial Asynchronous, or High Speed) interface cable.
Note:
This procedure assumes action has been taken to verify the failure is not
caused by a failure of one or both disk drives in the AW. Procedure 4.5.1, 4.5.2, or 4.5.3
should be followed to replace a defective disk drive.
Caution: Follow proper ESD grounding procedures when handling AW units.
Wear an antistatic wrist strap. Handle disk drives by their sides and store
ESD-sensitive components in antistatic containers.
PROCEDURE
1.
If the AW is operational, continue to Step 2. Otherwise skip to Step 5.
2.
Backup the AW operating system to disk and tape. See "Backup Administrative
Workstation Operating System," Procedure 4.4).
3.
Make full office backup tapes (see 235-105-210, 5ESS
Operations and Maintenance Procedures).
4.
Halt the system (see "Halt the Administrative Workstation," Procedure 4.2).
5.
Remove power to the AW. See "Remove Power to Administrative Workstation,"
Procedure 4.7.
6.
Remove and label the cables connected to the rear of the AW.
— DC power cables A and B. See Figure 4.6-1 (Netra t 1120) or 4.6-2 (Netra 20).
— Serial Asynchronous Interface cable (one or two equipped). See Figure 4.6-3
(Netra t 1120) or 4.6-4 (Netra 20).
— Ethernet Interface cables. See Figure 4.6-5 (Netra t 1120) or 4.6-6 (Netra 20).
— Serial A and Serial B cables. See Figure 4.6-7 (Netra t 1120) or 4.6-8 (Netra
20).
— ROP parallel cable. See Figure 4.6-10 (Netra t 1120) or 4.6-9 (Netra 20).
— High Speed Interface cable. See Figure 4.6-11 (Netra t 1120) or 4.6-12 (Netra
20).
1. Trademark of Sun Microsystems, Inc.
2. Registered trademark of Xerox Corporation.
Issue 3.00L
ADMINISTRATIVE WORKSTATION MAINTENANCE
1
t 1120 or Netra 20)
Procedure 4.6
®
Switch Routine
Page 4.6-1
2
,
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