Nortel DMS-10 Series Installation, Operation And Maintenance Manual page 593

Procedure 6-38
Error Control II Jumper PCA replacement (NTM609AB)
Step Description
CAUTION
Since all BMC PCAs are static sensitive, be careful when handling them.
Wear a wrist grounding strap when working with the BMC.
WARNING
Since the BMC is powered up during this procedure, observe all safety
procedures for operations on live equipment.
83
To remove the front panel of the BMC, loosen the four screws located on the left and right
hand sides. Once removed, put the front panel in a safe place to avoid damage; bending
and scratching.
84
Get the replacement PCA from the spares kit.
85
Remove the protective electrostatic bag and place it on a suitable, grounded surface.
86
Make sure the replacement PCA matches the faulty PCA's part number and has the
correct revision level. Also, make sure the suspected faulty PCA is in the standby
processor.
Verify that any applicable firmware for the PCA is the same or with a higher release
number. Otherwise, contact your next level of support.
87
Place the A processor unit an ONLY mode. At the Switch and Status Panel of the BMC:
a. Press the A/B Select Switch to A.
b. Press the O/P Mode Select Switch O.
c. Turn the Mode Switch to the right and release.
Note: This will create an alarm.
BMC II BISYNC Operation, Administration, and Maintenance Guide BMCB001 and up
Section 060-INDP-610 Maintenance Procedures Guide 6-155
(Sheet 1 of 3)