Troubleshooting A Peripheral Power Supply; Replacing A Peripheral Power Supply; Figure 7-2 Quarter-Turn Access Slot - Sun Microsystems Enterprise 6500 Reference Manual

7.3.1

Troubleshooting a Peripheral Power Supply

A green LED is lit on the power supply when it is operational. When a peripheral
power supply fails, a yellow LED is lit on the power supply.
See Chapter 10 "Flow Diagrams for Troubleshooting," for more information.
7.3.2

Replacing a Peripheral Power Supply

Caution – Remove and replace the peripheral power supply in a running system.
Do not replace the PPS when the system is in the low power mode.
1. Verify that the system is running and is not in the low power mode.
If you replace the PPS in low power mode, the system will power on unexpectedly.
Note that when the system is in low power mode, the front panel and board LEDs
are all off, and the yellow power supply LEDs are on.
2. Verify that onboard peripheral devices are not in use, or data may be lost.
Note that while the PPS is removed:
There is no peripheral power, and onboard peripheral devices will not operate.
There is no precharge current. Do not attempt to replace hot-pluggable devices
except for the PPS itself.
3. Use a Phillips #1 screwdriver to unlock the quarter-turn access slots (
the power supply.
FIGURE 7-2
7-4 Sun Enterprise 6500/5500/4500 Systems Reference Manual • April 1998
Unlocked
Quarter-Turn Access Slot
Locked
) on
FIGURE 7-2