186 Upgrade and Maintenance Manual TX120 S3
Expansion cards and backup units
9.2.4 Replacing TFM
9.2.4.1 Required tools
● Preliminary and concluding steps: tool-less
● Replacing an TFM: Phillips PH1 / (+) No.1 screw driver
9.2.4.2 Preliminary steps
Before replacing a TFM, perform the following steps:
Ê Disable boot watchdog functionality as described in section "Disabling
SVOM boot watchdog functionality" on page 80.
Ê Locate the defective server as described in section "Locating the defective
server" on page 50.
Ê Shut down the defective server as described in section "Shutting down the
server" on page 58.
Ê Disconnect the AC power cord from the system.
Ê Remove the server cover as described in section "Opening the server" on
page 61.
Ê Open the front cage as described in section "Opening the front cage" on
page 66.
9.2.4.3 Removing the defective TFM
Ê Remove the depending expansion card as described in section "Removing
expansion cards" on page 180.
Ê Disconnect the FBU adapater cable as described in section "Disconnecting
the FBU adapter cable from the TFM" on page 206.
Upgrade and Repair Units (URU)
Average task duration: 10 minutes
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