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3.8 How to Replace the NVRAM/TOD
Module
3.8.1 Before You Begin
Complete this task:
Section 2.8 “How to Avoid Electrostatic Discharge” on page 69
Note - If you are installing a new NVRAM/TOD module, the NVRAM/TOD must
be programmed by a Sun authorized service representative before your system can
resume normal operation. If you are installing a new main logic board, remember
that you can migrate your former NVRAM/TOD module in order to preserve your
system’s host ID and Ethernet address.
Note - For information about setting the flash PROM jumpers to enable you to
program the NVRAM, see Section 3.16 “How to Set the Flash PROM Jumpers” on
page 124.
3.8.2 What to Do
1. Insert the NVRAM/TOD module and its carrier into its socket on the main
logic board.
The carrier is keyed to ensure correct installation of the NVRAM/TOD module
into its socket on the main logic board. Make sure that the NVRAM/TOD module
is placed into its carrier correctly. The small marker dot on the top of the
NVRAM/TOD module should be on the same side as the narrow tab on the
carrier assembly.
108
Sun Enterprise 220R Server Service Manual ♦ January 2000, Revision A