Nortel DMS-10 - Installing the Replacement Disk Drive

30 Disk Replacement Procedure
297-6201-501 97Q3 Standard 02.01 July 1997
Installing the Replacement Disk Drive
IMPORTANT NOTES:
For 30 to 140 MB disk drives, the P1 ribbon cables Brown stripe
(PIN 1) must be toward the RIGHT, as viewed from the front.
For 30 to 140 MB disk drives, locate the manufacturer's Defective Track
Map Listing and keep handy, for use later in this procedure. If this cannot
be found, contact Technical Support before proceeding.
3 Disconnect disk A power by removing the connector plug P8
from the power supply on the A chassis. Pinch the release clips
on P8 and pull it down gently.
CAUTION
Wait at least 30 seconds before proceeding.
4 Remove the two screws from the disk drive handle mount.
5 Grasp the disk drive in the front at the bottom, by the handle,
slightly lift and pull straight forward until the J1 ribbon cable
connector can be viewed. Keep one hand under the disk drive to
maintain support.
Note: For 30 to 140 MB disk drives, the J1 connector is on the top of the
disk drive assembly.
6 Disconnect the ribbon cable from J1; use the cables pull tab.
Note the direction of the brown stripe on the cable (PIN 1).
7 Remove the disk from the chassis. Place the disk on an anti-
static surface. Fill out the disk drive fault analysis form and
attach it to the disk drive along with the Defective Track Map.
Procedure 3
Install replacement disk drive
Step Description
1 Keeping the disk drive level, slide it into position far enough to
reconnect the ribbon cable at connector J1. Connect the ribbon
cable to J1.
WARNING
The disk drive cannot operate if this cable is reversed.
Reversal may also cause an AMA outage.
2 Continue sliding the disk drive into its mounting position, until
it begins a downward motion. Allow the disk drive to lower
itself into place and continue pushing inward until it is fully
seated.
3 Replace the two screws for the disk drive handle mount.
4 Reconnect the disk power cable by inserting the plug P8 into
connector J8.
Procedure 2
Remove faulty disk drive
Step Description