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Cisco 7600 Series Routers

Field Notice: FN - 62572 - 1900W Power Supply Displays the Wrong Power Wattage - Replace Power Supply


Revised June 30, 2008
March 15, 2007


NOTICE:

THIS FIELD NOTICE IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTY OF MERCHANTABILITY. YOUR USE OF THE INFORMATION ON THE FIELD NOTICE OR MATERIALS LINKED FROM THE FIELD NOTICE IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS FIELD NOTICE AT ANY TIME.

Revision History

Revision Date Comment
1.3 30-JUN-2008 Removed Upgrade Form and references and links to the form. Changed workaround to standard RMA.
1.2 18-SEP-2007 Corrected a wrong serial number.
1.1 24-JUL-2007 Added additional serial number ranges to the Affected Serial Numbers section.
1.0 15-MAR-2007 Initial Public Release
Products Affected Top Assembly Printed Circuit Assembly HW Revision
Part Number Revision Part Number Revision
PWR-1900-AC/6
800-19187-01
ALL
34-1809-03
ALL
ALL
PWR-1900-AC/6/2
800-19187-01
ALL
34-1809-03
ALL
ALL
PWR-1900-AC/6=
800-19187-01
ALL
34-1809-03
ALL
ALL
PWR-1900-DC
800-19187-01
ALL
34-1810-03
ALL
ALL
PWR-1900-DC/2
800-19187-01
ALL
34-1810-03
ALL
ALL
PWR-1900-DC=
800-19187-01
ALL
34-1810-03
ALL
ALL

Problem Description

Cisco discovered a manufacturing process escape that led to the misprogramming of the 1900W EEPROM. The 1900W power supply may display an incorrect power wattage resulting in system error messages indicating that the power supply's output has failed. Refer to the Problem Symptoms section. There is no software reprogramming fix at this time. The power supply manufacturer has isolated the misprogrammed power supplies to a serial number range. Refer to the Affected Serial Numbers section.

Note: A 1900W power supply operating in redundant mode with a 110VAC input should display 1019.34W and with a 220VAC input should display 1869.42W.

Background

The 1900W power supply has an Input Voltage Monitor (IVM) output signal that sends logic low signal to the supervisor for 110VAC input and logic high signal to the supervisor for 220VAC input. The Supervisor is programmed within IOS to detect the IVM signal and show corresponding output power; 1019.34W for 110VAC and 1869.42W with 220VAC input. A manufacturing process escape resulted in the misprogramming of address 162 in the 1900W EEPROM with the value of '1' rather then '3'.

Problem Symptoms

A customer may see the following system error messages:

The following are examples to illustrate an incorrect and correct power wattage output via the command show power.

Note: These are purely examples to illustrate incorrect behavior. Varying values may be seen in a customer's network.

The following example illustrates the incorrect ouput of the show power command for a PWR-1900-DC= power supply operating in combined mode.

Note: These are purely examples to illustrate incorrect behavior. Varying values may be seen in a customer's network.

Incorrect output for PWR-1900-DC= operating in combined mode

Correct output for PWR-1900-DC= operating in combined mode

For more information on the 1900W AC and DC specifications refer to the following technical specifications guide: Cisco 7600 Series Router Power Supplies.

Workaround/Solution

Workaround:
None

Solution:
Cisco recommends all customers with a power supply in the affected Serial Number range replace the affected hardware.

As of approximately November 28, 2006, new products that were manufactured under Engineering Change Order (ECO) E087396 or deviation D087002 are guaranteed to be free of this problem. Refer to How to Identify Hardware Levels below for instructions on how to view the version and deviation of in-service product.

Note: Products that fall within the serial number range listed below are not affected by this problem if they have deviation D087002 applied.

Replace the affected hardware. [OR] Cisco recommends a fix-on-fail strategy for this problem.

Although an upgrade program had previously been provided to replace potentially affected but otherwise working product, the upgrade program is now over and Cisco will only replace product which has actually failed. The standard RMA process should be used to replace failed product.

DDTS

To follow the bug ID link below and see detailed bug information, you must be a registered customer and you must be logged in.

  
DDTS Description
CSCsh16506 (registered customers only) Wrong Power Capacity Displayed in IOS on Some PWR-1900-AC w/ 220V Input

How To Identify Hardware Levels

Issue the CLI command show idprom power-supply <#> detail to identify the serial number and manufacturing assembly information.
Example:

PE2#show idprom power-supply 2 detail
IDPROM for power-supply #2
IDPROM image:

(FRU is 'AC_6 power supply, 1900 watt')

IDPROM image block #0:

block-signature = 0xABAB, block-version = 3,
block-length = 160, block-checksum = 5511

*** common-block ***
IDPROM capacity (bytes) = 256 IDPROM block-count = 2
FRU type = (0xAB01,0x32)
OEM String = 'Cisco Systems, Inc.'
Product Number = 'PWR-1900-AC/6'
Serial Number = 'DCA1016405K'
Manufacturing Assembly Number = '34-1809-03'
Manufacturing Assembly Revision = 'A0'
Manufacturing Assembly Deviation = ''

Hardware Revision = 1.1
Manufacturing bits = 0x0 Engineering bits = 0x0
SNMP OID = 9.12.3.1.6.50
Power Consumption = 2427 centiamperes RMA failure code = 0-0-0-0
CLEI = IPP1FJ4AAA
VID = V01
*** end of common block ***

IDPROM image block #1:

block-signature = 0xAB01, block-version = 3,
block-length = 20, block-checksum = 482

*** power supply block ***
feature_bits = 00000000 00000000
rated current at 110v: 2427 rated current at 220v:4451 (centiamperes)
CISCO-STACK-MIB SNMP OID = 39
current_mode1 = 65535 cA maxfloat_mode1 = 65535 cA
current_mode2 = 65535 cA maxfloat_mode2 = 65535 cA
current_mode3 = 65535 cA maxfloat_mode3 = 65535 cA
current_mode4 = 65535 cA maxfloat_mode4 = 65535 cA
*** end of power supply block ***

End of IDPROM image

The Deviation sticker displaying Deviation No. D087002 can be visually located on the top left-hand corner of the power supply.

The affected date code can be visually deterimined by looking at the power supplies sticker as shown below:

Affected Serial Numbers

The following Serial Number range is affected by this problem:
PCA: 34-1809-03 : S/N range is from DCA1013405L to DCA10364076
PCA: 34-1810-03 : S/N range is from DCA10155003 to DCA10385074

On July 24th, 2007 the power supply vendor has informed Cisco that the affected serial number range is expanded to the following:

PCA Number Affected Serial Number Range Revision
34-1809-03
DCA10134001-DCA10214083
A0
DCA10364001-DCA1036408C
A0
DCA10424001-DCA104240FT
A1
34-1810-03
DCA10155001-DCA10155090
A0
DCA10385001-DCA1044500E
A0
DCA1044500F-DCA1044500T
A1

If you are determining the date code range from the power supply sticker shown in the section titled How to Identify Hardware Levels. The date code range is '0613 - 0638'.

Please replace all affected product using the standard RMA process.

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For More Information

If you require further assistance, or if you have any further questions regarding this field notice, please contact the Cisco Systems Technical Assistance Center (TAC) by one of the following methods:

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