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BMC II BISYNC Quick Reference Guide
Miscellaneous PCA Replacement
Procedure
The following PCAs can be replaced using this procedure:
• CPU with DMA (NT6M62xx)
• EPROM (NT6M63xx)
• DRAM with Extended Memory (NT6M64xx)
• Quad SIO (NT6M60xx)
• Disk Interface (NT6M66xx)
• DSI (NT6M70xx)
• TEC (NT6M89xx - DMS-10 only or NT6M90xx - DCO only).
Procedure 1
Miscellaneous PCA replacement
Step Description
CAUTION
Since all BMC PCAs are static sensitive, be careful when
handling them. Wear a wrist grounding strap when working
with the BMC.
WARNING
Since the BMC is powered up during this procedure, observe
all safety procedures for operations on live equipment.
1 To remove the front panel of the BMC II, loosen the four
screws located on the left and right hand sides. Once removed,
put the front panel in a safe place to avoid damage, bending and
scratching.
2 Get the replacement PCA from the spares kit.
3 Remove the protective electrostatic bag and place it on a suit-
able, grounded surface.
4 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. If not, contact the next level of support.
5 Place the processor unit with the suspected faulty pack 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 pack.
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.
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