Northern Telecom DMS-100 Series Maintenance Manual page 163

Procedure 4-60
Disk drive hardware error messages - procedures
(continued)
iii) See Printed Circuit Assembly Replacement in
297-1001-536: DPP Card Replacement Guide .
iv) If the problem is not cleared after PCA
replacement and restart, go to step d. Return
the original PCA to its position before
proceeding.
d. Switch processors; repeat steps A and B. If
successful, replace the suspect disk drive. If
unsuccessful, go to step D.
i) See Disk Drive Procedures, Replacing Disk
Drive.
ii) Repeat steps a and b. (If unsuccessful, go to
step e.)
e. Call for technical assistance.
End
DPP Recovery and Routine Maintenance Guide BCS35 and up
Disk drive procedures 4-129