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Cisco ONS 15454 Series Multiservice Provisioning Platforms

Field Notice 12971: ONS 15454 - Shelf Assembly Quality Issue


November 2, 2000



Products Affected

Product

Top Assembly

Printed Circuit Assembly

Comments

HW Rev.

Part Number

Rev.

Part Number

Rev.

15454-SA-NEBS3E

800-07149-01

All

All

All

ASY,ELMECH,15454 SHELF NEBS3E

All

15454-SA-NEBS3E

800-07149-01

All

All

All

ASY,ELMECH,15454 SHELF NEBS3E

All

Problem Description

In some shelf assemblies [15454-SA-NEBS3E=] there is a potential manufacturing defect present that can cause "fit" issues with the Fan Tray Assembly (FTA) [15454-FTA2=].

Background

The issue was identified in the field and was confirmed through a detailed mechanical inspection of the shelf assembly. We have further identified that defect was introduced in manufacturing through the use of a #6-32x3/8" screw instead of a #6-32x1/4" screw.

Problem Symptoms

In some shelf assemblies it is possible that tolerance build up may result in a screw contacting the FTA upon insertion into the shelf assembly. This screw may prevent full (complete) insertion of the FTA module into the shelf assembly. This would be apparent at turn-up as the FTA slot is populated and would cause the FTA to protrude from the shelf assembly causing a poor fit.

Workaround/Solution

As a result of this manufacturing issue, it may be necessary to replace the screw highlighted in the picture below "ONS 15454 (Rear Panel)" marked with the letter "C" with a 6-32x1/4" screw as supplied by the Cisco Technical Assistance Center.

If you discover that you have a shelf assembly that you believe has been affected by this issue, please contact Cisco's Technical Assistance Center to either have a screw dispatched for replacement or to request an on-site visit from one of our support technicians to perform the replacement.

Instructions For Screw Replacement

  1. Remove the five screws marked by the letter "A" and the red circles. (qty 5)

  2. Remove plastic alarm cover marked by the letter "B" and the green arrow. (qty 1)

  3. Remove the screw marked by the letter "C" and the blue arrow (qty 1) along with the plastic clamp marked with the letter "D" and the black arrow. (qty 1)

  4. Replace the screw removed in step 3 with the 6-32x1/4" screw supplied by the Technical Assistance Center along with the plastic clamp. (qty 1)

  5. Replace the alarm cover removed in step 2.

  6. Replace the screws removed in step 1.

ONS 15454 (Rear Panel)

fn12971_g39ogy.gif

This issue will be addressed with the introduction of a pem stud and nut to attach the power management clip to the shelf. This will be introduced in the part number 800-07149-02. Until this is implemented, we have modified the Bill of Materials to eliminate the use of the 6-32x3/8" screw.

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: