Service manual

System Overview 1-91
The PCI box console serial bus node ID module is a small board mounted at the
right rear of the PCI box that provides the bulkhead interface for the CSB cable,
PCI box CSB node ID switch, and PCI box status LEDs. Figure 1–41 is a
drawing of the module.
PCI Box ID
A small switch on the CSB ID module is used to set the PCI box node ID. The
ID becomes part of the CSB node address for the box. All PCI boxes on the CSB
must have a unique address; therefore, the ID switch setting must be unique for
each PCI box in the system. The switch has 16 positions and displays the
setting as 0 to 15.
PCI Box LEDs
The LEDs are vertically aligned on the bulkhead and are listed from top to
bottom.
SCM Master
(green)
On
Off
Lit when the SCM in this PCI box is the CSB
master
No standard I/O module, or
SCM in this PCI box is not the CSB master.
PBM BIST
(yellow)
On
Off (normal)
Lit by Vaux power on reset
Cleared by the PBM when it passes BIST
SCM BIST
(yellow)
On
Off (normal)
Lit by Vaux power on reset
Cleared by the SCM when it passes BIST
DC Power OK
(green)
On (normal)
Off
Power supply outputs within regulation
Power supply off or outputs out of regulation
Vaux OK
(green)
On (normal)
Off
Vaux is on and within regulation
Vaux is not on or is out of regulation