Nortel DMS-10 Series Quick Reference Manual page 68

58 56K Interface PCA Replacement Procedure (NT6M94xx)
Procedure 10
56K Interface PCA (NT6M94xx) replacement
Step
7 Remove power from the standby chassis (A or B; the one with
the suspected fault) by operation of the +8 V dc red rocker
switch on the power supply.
8 Remove the suspected faulty PCA.
9 The replacement PCA option settings must be set to match the
settings for that PCA listed in the PCA Switch and Strap Set-
tings section before installation.
CAUTION
Failure to set-up options correctly may cause an AMA loss.
10 Insert the spare PCA in the vacated card slot, making sure it is
fully seated.
11
Put faulty PCA in the empty electrostatic bag.
12 Apply power to the BMC chassis by operation of the +8 V dc
red rocker switch, reversing step 7.
Wait for start-up activity to end and the message, CP S/W
Loaded to print.
13 To clear any alarms on the standby processor. At the mainte-
nance terminal, enter:
>DOS S RSERR 00 (cr)
Alarms will stay clear on the standby processor if there are no
faults.
14
After RSERR, alarms may reappear. The command, CP TEST,
forces diagnostics which confirm whether the faults were cor-
rected. Enter: (at the terminal)
>CP TEST STDBY (cr)
Note: The tests will take several minutes to execute, and the program
test is the last test to run.
If all tests do not pass, contact the next level of support.
15 Place the active processor unit in PRIME mode. At the Switch
and Status Panel of the BMC:
a. Press the A/B Select Switch to B.
b. Make the O/P Mode Select Switch P.
c. Turn the Mode Switch to the right and release.
16 To clear any alarms on the active processor. At the mainte-
nance terminal, enter:
>RSERR 00 (cr)
Alarms will clear if there are no faults.
297-6201-500 BMCA001 and up
Description
Standard 02.01 July 1997