IBM 2109 Service Guide - Page 65

Installing a fan assembly, Replacing the system board assembly, Tools that are required

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Page 65 highlights

Installing a fan assembly Note: When reconnecting the power connector of the fan to its mating connector, be certain the connector is properly oriented before installing. Do not force the connector. 1. Slide the assembly into the back of the chassis. The power connector of the fan assembly should be in the down position. 2. Refasten the four captive screws on the rear of the chassis by pressing them in and turning them clockwise. 3. Turn on the switch power. 4. Verify that the fans are turning. 5. To further verify the switch operation, go to "Verifying switch repair" on page 51. Replacing the system board assembly Replacing the assembly involves removing the existing system board assembly and installing a new system board assembly. Tools that are required You need a number 4 Flat head screwdriver. Attention: The system board contains electrostatic sensitive devices. Before working on the switch, use ESD precautions, such as wearing a wrist grounding strap connected to chassis ground. Removing the system board 1. Unplug the switch. 2. Remove and label any cables that are attached to the GBIC modules in the system board. 3. Remove all GBIC modules. See "Replacing a GBIC module" on page 47. 4. Remove the power supplies. See "Replacing the power supply" on page 45. 5. Unscrew the front screw on the front panel. Notice the assembly slowly moving forward as the screw loosens, exposing the copper connectors on the sides of the assembly. See Figure 21. Front screw Figure 21. System board assembly SJ000060 Chapter 5. Replacing FRUs 49

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Installing a fan assembly
Note:
When reconnecting the power connector of the fan to its mating connector,
be certain the connector is properly oriented before installing. Do not force
the connector.
1.
Slide the assembly into the back of the chassis. The power connector of the fan
assembly should be in the down position.
2.
Refasten the four captive screws on the rear of the chassis by pressing them in
and turning them clockwise.
3.
Turn on the switch power.
4.
Verify that the fans are turning.
5.
To further verify the switch operation, go to “Verifying switch repair” on page 51.
Replacing the system board assembly
Replacing the assembly involves removing the existing system board assembly and
installing a new system board assembly.
Tools that are required
You need a number 4 Flat head screwdriver.
Attention:
The system board contains electrostatic sensitive devices. Before
working on the switch, use ESD precautions, such as wearing a wrist grounding
strap connected to chassis ground.
Removing the system board
1.
Unplug the switch.
2.
Remove and label any cables that are attached to the GBIC modules in the
system board.
3.
Remove all GBIC modules. See “Replacing a GBIC module” on page 47.
4.
Remove the power supplies. See “Replacing the power supply” on page 45.
5.
Unscrew the front screw on the front panel. Notice the assembly slowly moving
forward as the screw loosens, exposing the copper connectors on the sides of
the assembly. See Figure 21.
SJ000060
Front screw
Figure 21. System board assembly
Chapter 5. Replacing FRUs
49