Nortel DMS-10 Series Quick Reference Manual page 60

50 Power and Alarm Comm. PCA Replacement Procedure
Procedure 7
Power and Alarm Communications PCA (NT6M84xx)
replacement
Step
Note: Verify the cable markings (identification) or attach labels to the
cables for correct positioning.
WARNING
Incorrect positioning of cables will cause alarms and com-
munication problems.
9
Properly reroute all cables. Make sure all wires and cables are
routed so they are not pinched or in contact with the arc of the
fan blades.
10 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.
11
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.
12
If BMC status panel shows processor is in ONL mode go to
step 13, otherwise go to step 14.
13 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 match the active processor.
b. Press the O/P Mode Select Switch to P.
c. Turn the Mode Switch to the right and release.
14 Verify replacement PCA has corrected original error.
15
Test the polling function on the Non-Turbo BMCs equipped
with 30, 72, and 140 MB disk drives only.
16 When all maintenance activities are complete, be sure to
replace the rear panel in its fully seated position and reinstall
the slotted pan head screws previously removed.
Also replace the front panel of the BMC if removed. Carefully
line up the four captive screws of the front panel with their
mounting holes. Tighten the captive screws; but do not bear
down.
The procedure is complete.
297-6201-500 BMCA001 and up
Description
Standard 02.01 July 1997