Service manual

System Overview 1-49
Figure 1–19 is a block diagram of the power system manager module. For a functional
description of the power system manager, see Section 1.8.4.
Figure 1– 20 PSM Module LEDs and Jumpers
Figure 1–20 shows the service switch, the PSM module LEDs, and jumpers.
Service Switch
When in the Normal position, the switch allows the PSM normal operational control of
the QBB. When set to the Service position, 48V does not get converted to logic voltages
but may still be present on the backplane. Placing the switch in the Service
position prevents a remote operator from turning the QBB back on.
LEDs
QBB DC Good
(Green)
On (normal)
Off
All DC voltages in the QBB are good
System/QBB off or DC voltage(s) not good
Reset/Initialize
(yellow)
On
Off (normal )
The PSM is in the reset/initialize state
Self-test passed and PSM configuration done
Hot Swap DC OK
(green)
On (normal)
Off
On-board hot-swap regulator is good
On-board hot-swap regulator is not good
PSM DC OK
(green)
On (normal)
Off
DC voltages on the PSM are good
DC voltages on the PSM are not good
Vaux OK
(green)
On (normal)
Off
Vaux present at the module
Vaux not present
Jumpers
J6 When installed, the most significant bit of the CSB address field is set to 1.
J7 When installed, the hardware cannot write the PSM’s flash memory.
J9 When installed, the micro will remain in fail-safe loader mode after a PSM reset.