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Appendix A
sx2000 LEDs
173
Figure A-2 PDH Status
A label will be placed on the outside of the SDCPB Frame to indicated PDH Status, DC/DC Converter faults
that shutdown the sx2000 cell, and loss of DC/DC Converter Redundancy. Figure A-2 illustrates the label and
table A-4 describes each LED. Note: The Power Good LED is a Bi-Color LED (Green/Yellow).
Table A-4 PDH Status and Power Good LED States
LED Description Definition
BIB Boot Is Blocked When illuminated, it tells the end user that
the system is ready to boot.
SMG Shared Memory Good This references non-volatile memory that
manageability and system firmware share.
When illuminated, it tells the end user that
the system is ready to begin fetching code.
USB Universal Serial Bus When illuminated, tells the end user that
PDHC is communicating with the MP.
HB Heart Beat When blinking, the PDHC processor is
executing. And the cell board can be power
enabled.
Power Good Power Good Solid green - All power is operating withing
specifications.
Blinking yellow - Voltage rail(s) have been
lost and the cell board has shutdown.
Solid green but blinking yellow - Cell board
still operating, but one of the redudant
converters has failed on one of the voltage
rails
PDH STATUS
MSB
LSB
BIB
HB
SM US
Power
Good