Field Notice: FN - 64167 - IR809 Chassis Powered by Negative DC Power Might Fail - Replace on Failure

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	Publish Date	Comments
1.0	26-Jan-17	Initial Release
10.0	19-Oct-17	Migration to new field notice system
10.1	06-Mar-18	Archiving Umpire - removing text referring to Upgrade Program
10.2	03-Jul-18	Added Version ID

Products Affected

Affected Product ID	Comments
IR809G-LTE-GA-K9
IR809G-LTE-NA-K9
IR809G-LTE-VZ-K9

Defect Information

Defect ID	Headline
CSCvf34445	There were no defects filed with this field notice at the time of publication.

Problem Description

In some Cisco 809 Integrated Services Router (IR809) units, the capacitor leads were not trimmed to specification. This can cause a short circuit between the DC power terminals and the chassis. Customers who power the chassis with negative DC power are more likely to see this issue. The failure occurs when a negative power supply is used, such as when operating at -48VDC.

The type of fault that is observed in the IR809 unit (capacitor lead short circuit to the chassis) is not considered a safety hazard.

Note: All of the IR809 units with Version ID (VID) of V03 or later are not affected.

Background

Cisco is aware of one occurrence where an IR809 unit experienced this issue in a customer environment.

Problem Symptom

When a negative power supply is used and the chassis is connected to ground, an IR809 unit with affected capacitor pins blows the internal fuse once powered up.

An IR809 unit that is powered by a positive power supply continues to operate normally. However, the hold-up time during loss of power might be diminished.

Workaround/Solution

Customers who power their IR809 units with negative DC power, and whose units have a VID of V01 or V02, should replace the units through the normal RMA process.

Customers who do not rely on the hold-up time and power their IR809 units with positive DC power, and whose units have a VID of V01 or V02, can continue to use the IR809 as is.

Note: All of the IR809 units with a VID of V03 or later are not affected.

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:

• Open a service request on Cisco.com
• By email
• By telephone

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