Reliant Octel 200 and Octel 300 Message Servers PB6001401 User Manual Page 471

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Hardware
Replacement 9-39
Octel Overture 200/300 Serenade 3.0
PB60014–01
13. Tighten
the two fasteners on the front of the power supply unit and disk-drive assembly
.
14. T
est the message server for correct operation by following the procedures in the Installation chapter
in this volume.
15.
Close and lock the door to the cabinet.
Removing a Motherboard Assembly from the Octel Overture 300
To
remove the Motherboard Assembly
, refer to Figure 9-24, Figure 9-25, and Figure 9-26, and use the
following procedures:
1.
Unlock and open the door of the cabinet.
2.
Put on an antistatic wrist strap. Connect it to an unpainted portion of the cabinet.
3. T
urn OFF the power supply unit. Refer to the Power Supply Unit Replacement section in this chapter
for details about turning OFF the power to the message server
.
4.
Disengage the cards in slots A1 through A14 from the motherboard. (The cards stay in the cabinet.)
Remove the floppy-diskette signal cable.
5.
Using a flat-bladed screwdriver
, loosen the two captive screws on the front of the power supply unit.
Disengage the motherboard from the backplane. (The power supply unit stays in the cabinet.)
6.
Move to the back of the Octel Overture 300 cabinet and label all cables attached to the motherboard,
so that they can be reattached in the same positions on the new motherboard.
7.
Disconnect the cables from the motherboard.
8.
Remove four screws that secure the top panel to the cabinet, and remove the panel.
9.
Disconnect the maintenance-port cable from the upper left hand corner of the motherboard assembly
.
10.
Remove the power filter assembly as described in the Octel Overture 300 Power
-Filter Assembly
Replacement section of this chapter
.
11.
Using a Phillips head screwdriver
, remove the four screws that secure the bottom panel to the
cabinet, and remove the panel.
Cables that were disconnected from the motherboard in step 7 are fastened to the bottom panel with
cable ties. These cables can remain fastened.
12.
Disconnect the power harness for the disk-drive backplanes (SCSI motherboard) at the motherboard.
Leave the harness ends connected to the disk-drive backplanes.
13.
Disconnect the two short flat cables from the motherboard. Leave the cables attached to the top
disk-drive backplane.
14.
Disconnect the fan power harness from the top disk-drive backplane.
15.
Remove the five screws that secure the motherboard to the cabinet from the sides of the motherboard
I/O panel.
16.
Remove the 18 screws that hold the top and bottom of the motherboard to the cabinet, and remove
the motherboard.
17.
Remove the power
-filter harness from the motherboard, so that it can be installed on the new
motherboard.
The hardware used to secure the harness to the motherboard (two screws, two nuts, and a
lockwasher) is reused when securing the harness to the new motherboard.
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