Nortel DMS-10 Series Installation, Operation And Maintenance Manual page 557

rocker switch, ON, to restore the +8.5 V dc line. The disk drive in this chassis
is not affected by removal of the +8.5 V dc source.
PCA Replacement Procedures
The following subsections contain the procedures necessary to replace
various BMC PCAs.
Miscellaneous PCA Replacement (NT6M60xx, NT6M62xx, NT6M63xx,
NT6M64xx, NT6M66xx, NT6M70xx, and NT6M89xx)
The following PCAs can be replaced using this procedure:
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•
•
•
•
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Procedure 6-35
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.
48
To remove the front panel of the BMC, 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.
BMC II BISYNC Operation, Administration, and Maintenance Guide BMCB001 and up
Section 060-INDP-610 Maintenance Procedures Guide 6-119
CPU with DMA
EPROM
DRAM with Extended Memory
Quad SIO
SCSI Interface
TEC/DSI.
(Sheet 1 of 4)