This document describes how to test and replace internal system power
supplies in the chassis.
Warning: Before you install, operate, or service the system, refer to the
Preparation and Safety Guide. This guide contains important safety
information to know before you work with the system.
There are no specific requirements for this document.
This document is not restricted to specific software and hardware
For more information on document conventions, refer to the
Technical Tips Conventions.
Use these commands to display the status of the power supply LEDs
without direct access to the switch:
Displays temperature and voltage information on the
show hardware [detail]
Displays details about hardware, which includes power
show diag power-on
The power-on or hardware reset diagnostics provide a full set of
test suites to test the Cisco Catalyst 8500 multiservice ATM switch router
(MSR) and Cisco LightStream 1010 ATM switch hardware. The switch memory stores
test results, and use of the show diag power-on
command provides an interface. If error detection occurs during the test, the
ATM switch processor status LED turns red. The watchdog timer timeout or
software warm start can run minimum diagnostics.
Perform these steps to verify the power supply status and version:
Step 1 Display the power supply status.
Switch# show environment
Temperature normal: chassis core measured at 27C/80F
Power Supply 0 status: OK
Step 2 Check the power supply status.
If the status is not
, the power supply can
require replacement. Issue the show hardware command
to check the power supply serial number and revision.
8540MSR# show hardware
C8540 named 8540MSR, Date: 16:50:11 UTC Wed Mar 20 2002
Slot Ctrlr-Type Part No. Rev Ser No Mfg Date RMA No. Hw Vrs Tst EEP
---- ------------ ---------- -- -------- --------- -------- ------- --- ---
0/* Super Cam 73-2739-03 D0 03170TAL May 03 99 0 3.1
Slot Part No. Rev Serial No. RMA No. Hw Vrs Power Consumption
---- ---------------- ---- ----------- ----------- ------- -----------------
0 34-0918-02 B0 ACP03220289 00-00-00-00 2.1 2746 cA
Step 3 Check that the power-on diagnostics show as
appear in the show diag power-on output, check which
procedure appears with a U. The
U indicates "unknown". Verify that this
procedure is well connected and has power. For more information on how to issue
the show diag power-on command, refer to the
ASP Red Status Light and Power-on Diagnostic Problems on the LightStream 1010
and Catalyst 8510-MSR.
Switch# show diag power-on
Cat8540 Power-on Diagnostics Status (.=Pass,F=Fail,U=Unknown,N=Not Applicable)
Last Power-on Date: 2002/02/04 Time: 00:04:14
BOOTFLASH: . PCMCIA-Slot0: . PCMCIA-Slot1: N
CPU-IDPROM: . NVRAM-Config: .
ETHSRAM: . DRAM: . SARSRAM: .
PS0: . PS2: N PS (12V): .
FAN: . Temperature: . Bkp-IDPROM: .
Ethernet-port Access: . Ethernet-port CAM-Access: .
Ethernet-port Loopback: . Ethernet-port Loadgen: .
Power-on Diagnostics Passed.
The three LEDs on the Catalyst 8540 power supply perform these
Note: See the figure in the section Catalyst
8540 Power Supply LEDs.
Input OK LED indicates the state of operation of the power supply.
Fan OK LED indicates the state of operation of the power supply fan.
Output Fail LED indicates that the output voltage is outside of the
This table describes the Catalyst 8540 power supply LEDs:
Power supply is on and receives source power
Fan assembly operates properly
Output voltage is outside of the proper range, +3.3, +5, +12, and
Output voltage is in the proper range
On the ATM switch processor front panel, the PS0 LED goes on when the
power supply in the left bay has had a successful installation and supplies
power to the system. The power supply in the left bay has the label Power
Supply 0. The PS1 LED goes on when the power supply in the right bay has had a
successful installation and supplies power to the system. The power supply in
the right bay has the label Power Supply 1. Both the LEDs are on in systems
with redundant power. The table Catalyst 8510 ATM Switch
Processor Power Supply LEDs describes the ATM switch processor LEDs, and
this figure illustrates them:
ATM Switch Processor Power Supply LEDs
Catalyst 8510 ATM Switch Processor Power Supply LEDs
If the left bay power supply operates, the PS0 LED is
If the left bay power supply is off or not operational, the PS0
LED is red.
If you have not installed the left bay power supply, the PS0 LED
If the right bay power supply operates, the PS1 LED is green.
If the right bay power supply is off or not operational, the PS1
LED is red.
If you have not installed the right bay power supply, the PS1 LED
The green LED indicates the status of the power supply and internal DC
voltages. The LED stays on when the power supply is on, receives source power,
and provides +5, +12, and +24 VDC to internal components. The LED also
indicates that all internal voltages are within tolerance.
If the source power or any of the internal DC voltages exceed allowable
tolerances, the LED goes off. The system environmental monitor messages
indicate the out-of-tolerance line. Because the system requires all three
output voltages for operation, expect the system to malfunction or shut down if
any of the internal DC voltages reach an out-of-tolerance state.
Catalyst 8510 Power Supply LED with AC Power