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Clock Board 6-5
6
6.2.4 Removing a Clock Board
Caution – The clock board is not hot-pluggable. Do not remove the clock
board until the system has been halted and powered-off.
Caution – To avoid damaging internal circuits, do not disconnect or connect
any cable while power is applied to the system.
Note – If you are replacing the clock board, then the TOD NVRAM from the
old board must be removed and placed on the new board. This is necessary to
match the host ID with the Ethernet ID. Note also that if a system is replaced,
then the TOD NVRAM on the clock board must also be changed.
1. You must halt the operating system before turning off the system power.
See Chapter 12, “Powering Off and On,” for this procedure.
2. Unfasten cable connectors from the board front panel and set them aside.
Label cables to identify them for reconnection later.
3. Loosen the two captive screws securing the board to the system chassis.
4. Pull the ends of both extraction levers outward simultaneously to release
the board from the centerplane receptacles.
See Figure 6-2.
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