Northern Telecom BCS35 Replacement Manual page 87

Procedure 8–1
Replacing the H.P. Disk Interface circuit pack (A11, B11)
Step Description
8 At the maintenance terminal, enter:
(cr)
9 At the maintenance terminal, enter:
10 Place the active processor unit in
PRIME mode. At the Switch and
Status Panel:
a. Press the A/B Select Switch to
match the active processor.
b. Make the O/P Mode Select
Switch P.
c. Turn the Mode Switch to the
right.
11 At the maintenance terminal, enter:
12 If alarm status shows active alarms,
troubleshoot all alarm conditions .
At the maintenance terminal, enter:
TEST ACT (cr)
TEST STDBY (cr)
Note: Make sure any circuit pack option settings are correct before replacing any cards. Incorrect
settings can cause improper performance and produce faultlike symptoms in the DPP.
RSERR STDBY 00
TEST STDBY 00 (cr)
RSERR ACT 00 (cr)
End
DPP Card Replacement Guide BCS35 and up
Disk Interface circuit pack 71
(continued)
Notes
To clear any alarms on the
standby processor. Alarms
will clear if there are no faults.
After RSERR, alarms may
reappear. TEST forces
diagnostics which confirm if
the fault were corrected.
Make the active processor the
PRIME processor.
Turn it 45 degrees to the right
and release.
To clear all alarms on the
active processor. Alarms will
clear if there are no faults.