Northern Telecom DMS-100 Series Maintenance Manual page 47

Procedure 4-8
Disk drive replacement procedure - removing the faulty disk drive
Step Description
6 Remove the 2 screws from the disk drive
handle mount.
7 Grasp the disk drive in the front at the
bottom, by the handle, and pull straight
forward until it stops.
8 Begin lifting up as you pull forward. Keep
one hand under the disk drive to maintain
support.
9 Continue pulling forward slowly until a
ribbon cable connector, J1, appears on the
top of the disk drive assembly.
10 Disconnect the ribbon cable from J1; use
the pull tab attached.
11 Remove the disk drive from the chassis.
Notes:
Note 1: For DPP Systems with 380-Mbyte disk drives, the parameter information is already loaded on the disk. If the
PARAM (PARM) command is used, use Disktype = 8.
Note 2: Consult with technical assistance personnel before entering DISK PARAMs to determine what type disk drive is in
the DPP System before attempting to enter disk PARAM information.
Note 3: In the event the system "prompts" for parameter data for a 380-Mbyte disk, use the same values as for a 140-Mbyte
disk.
Notes
See Figure 3-1 for the location of the
screws.
As it continues forward out of its mounting
position, the disk drive rides up on its
retaining pins.
Connector is located near the rear of the
disk drive assembly. See Figure 4-1.10
Hold the cable out of the way to prevent
damage. Note direction of Brown stripe
(PIN 1).
Place the disk drive on an antistatic surface
to avoid damage to the PCA on the bottom.
Attach the disk drive manufacturer's bad
track map for this disk drive for future
maintenance activity requirements. (This
does not apply to 380- or 760-Mbyte disks;
no bad track maps issued.)
End
DPP Recovery and Routine Maintenance Guide BCS35 and up
Disk drive procedures 4-13
(continued)