Power Supply Replacement Procedure (NT6M71xx) 45
BMC II BISYNC Quick Reference Guide
12 Apply power to standby chassis by operation of the +8 V dc red
rocker switch on the power supply.
Wait for start-up activity to end and the message, Software
Loaded or S/W Loaded to print.
13 Place the active processor unit in PRIME mode. At the Switch
and Status Panel of the BMC:
a. Depress the P side of the O/P Mode Select Switch.
b. Turn the Mode Switch to the right and release.
14 Make the disk system redundant. At the maintenance terminal,
enter:
>DSK MOD xx (cr)
where: xx - disk mode: AP - A PRIME (if mode is A only)
BP - B PRIME (if mode is B only).
The BMC will begin a disk copy, this may take several hours,
depending on how much data is stored and the size of the disks.
Proper response:
DISK MODE: AP (from disk mode AO)
or
DISK MODE: BP (from disk mode BO)
15 To clear any alarms on the standby processor. At the mainte-
nance terminal, enter:
>MONS (cr)
>RSERR (cr)
>(CNTL) Z (cr)
Alarms will clear on the standby processor if there are no faults.
16 To clear any alarms on the active processor. At the mainte-
nance terminal, enter:
>RSERR (cr)
Alarms will clear if there are no faults.
17 When all maintenance activities are complete, be sure to
replace the front panel of the BMC, if removed. Carefully line
up the four captive screws of the front panel with their mount-
ing holes. Tighten the captive screws; but do not bear down.
The procedure is complete.
Procedure 8
Power Supply (NT6M71xx) replacement
Step Description
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