IBM N6270, Hardware And Service Manual

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NVMEM LED
2. If you are not already grounded, properly ground yourself.
3.
Turn off the power supplies, unplug the power cords from the power source,
and remove the power cords.
Opening the system
To access components inside the controller module, you must open the system.
Procedure
1. If you are not already grounded, properly ground yourself.
2. Unplug the system cables and SFPs from the controller module, as needed, and
keep track of where the cables were connected. Leave the cables in the cable
management arm, so that when you reinstall the cable management arm in the
controller module, the cables will be organized.
3.
Disconnect the right and left cable management arms from the controller
module. To release the arms, press the silver button on the power supply side
of each arm, and then remove the arm from the controller module.
4. Loosen the thumbscrew on the cam handle.
5.
Pull the cam handle downward and slide the controller module out of the
system.
Removing an RTC battery
You must follow a specific sequence of steps to remove the RTC battery from the
controller module.
LNK LNK
0a 0b
0c
0d e0b
e0a
c0b
c0a
!
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Figure 33. NVMEM LED
LNK
LNK
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IBM System Storage: N6200 Series Hardware and Service Guide