Nortel North American DMS-100 Instruction Manual page 114

Replacing an 8-in. or a 5.25-in. disk drive unit
At the front of the DDU shelf
14
15
16
17
At the back of the DDU shelf
18
DMS-100 Family NA100 Trouble Locating and Clearing Procedures Volume 2 of 2 LET0015 and up
Trouble locating and clearing procedures (continued)
WARNING
Static electricity damage
To handle the DDU, wear a wrist-strap that connects to a
grounding point. Grounding points are on the frame
supervisory panel (FSP) or a modular supervisory panel
(MSP). The wrist-strap protects against static electricity
damage.
Set the power switch on the power converter to the OFF position.
Ensure that the converter fail LED on the power converter card lights. The lit
fail LED of the power converter card indicates that the power is OFF.
Remove the four mounting screws to remove the panel in front of the DDU.
The next action depends on the mounting configuration for the DDU.
If the DDU
mounts vertically on tracks
mounts horizontally on a 14-in.
DDU drawer frame
Disconnect the power cable from the back of the DDU.
Do
step 18
step 38
1-99
(continued)