Nortel DMS-10 Series Installation, Operation And Maintenance Manual page 558

6-120 Section 060-INDP-610 Maintenance Procedures Guide
Procedure 6-35
Miscellaneous PCA replacement
Step Description
49
Get the replacement PCA from the spares kit.
50
Remove the protective electrostatic bag and place it on a suitable, grounded surface.
51
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.
52
Place the processor unit with the suspected faulty PCA in the standby mode, by putting
the other processor in the ONLY mode. The other processor is defined as that
processor that does not have the suspected faulty PCA.
At the Switch and Status Panel of the BMC:
a. Press the A/B Select Switch to match the other processor.
b. Press the O/P Mode Select Switch to O.
c. Turn the Mode Switch to the right and release.
Note: This will create an alarm.
53
Enter the following commands to write the value 00 in the DRAM memory address
2204 for the off-line TEC/DSI PCAs:
>DOS S TECMAINT MEMWRITE 1 2204 00 (cr)
>DOS S TECMAINT MEMWRITE 2 2204 00 (cr)
54
Remove power from the standby BMC chassis by operation of the +8 V dc red rocker
switch on the power supply.
(A or B, the one with the suspected fault.)
55
Remove the suspected faulty PCA.
297-6201-502 Standard 01.02 September 2000
(Sheet 2 of 4)