Nortel North American DMS-100 Instruction Manual page 140

49
50
51
52
53
54
At the back of the frame
55
DMS-100 Family NA100 Trouble Locating and Clearing Procedures Volume 2 of 2 LET0015 and up
Trouble locating and clearing procedures (continued)
Replacing a 14-in. disk drive unit
Use three evenly-spaced plastic cable ties to secure the cable to the upper
rail of the DDU.
Make sure that you position the cable to avoid interference with the frame
hardware or converter when the DDU drawer closes.
Plug the converter end of the DDU power cable into connector C04 on the
back of the power converter.
Obtain the model number of the DDU from the label on the inside red of the
DDU.
If the model number
is 15450
is other than listed here
Make sure that you remove the strap at location W3 on the main PCB of the
DDU.
You need two persons to perform this step. One person stands at the front of
the frame and the other person stands at the back of the frame.
The person at the front of the frame presses the release buttons on the DDU
slide rails. The front person slowly slides the DDU until it closes. The person
at the back makes sure that the hardware in the frame does not catch the
cables.
CAUTION
Make sure that the ribbon cable is routed correctly.
Route the ribbon cable as shown in the figure that follows.
Failure to route the cable correctly can result in loss of
information caused by signal interference.
Route the ribbon cable as shown in the following figure.
Do
step 53
step 54
1-125
(continued)