Reliant Octel 200 and Octel 300 Message Servers PB6001401 - Manual (Page 481)

Hardware Replacement 9-49
Octel Overture 200/300 Serenade 3.0 PB60014–01
Caution!
The Octel Overture 300 is sensitive to static
electricity. Do not attempt the following procedures
without wearing an antistatic wrist strap.
Removing the Load Resistor Assembly from the Octel Overture 300
Use the following procedures to remove the load-resistor assembly:
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. Turn 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. Using a flat-bladed screwdriver, loosen the two captive screws on the front of the fan assembly.
5. Pull the fan assembly forward about 1 inch. The fan assembly does not need to be removed from the
cabinet.
6. At the rear of the cabinet, remove the four screws that hold the bottom panel to the back of the
cabinet, and set the panel aside.
7. Locate the load-resistor assembly on the shelf B backplane (refer to Figure 9-28). Note that the
harness attached to the load-resistor assembly is also attached to the shelf B disk- drive backplane
and to the fan assembly.
8. Remove the three screws that secure the fan-assembly connector to the cabinet.
9. Disconnect the harness where it plugs into the shelf B backplane.
10. Remove four screws and washers that secure the load-resistor assembly sheet metal to the cabinet,
and set the load-resistor assembly aside.
Installing a Load Resistor Assembly in the Octel Overture 300
Use the following procedures to install a load-resistor assembly:
1. Put on an antistatic wrist strap. Connect it to an unpainted portion of the cabinet.
2. Verify that the power supply switch is OFF.
3. Secure the load-resistor assembly sheet metal to the chassis with the four screws and washers, as
shown in Figure 9-28.
4. Connect the load-resistor assembly/fan-assembly harness to the shelf B backplane.
5. Secure the fan-assembly connector to the cabinet with three screws.
6. Attach the bottom rear panel to the cabinet with four screws.
7. Slide the fan assembly back into the cabinet, and secure it with the captive screws on the front of the
assembly.
8. Turn ON the message server at the power supply unit switch, and check for correct message-server
operation. Make sure that the fans are spinning.
9. Close and lock the door of the cabinet.