User Guide

Nokia Customer Care Antenna Description and Troubleshooting

6255/6255i/6256/6256i (RM-19)

Introduction

This troubleshooting guide addresses potential failures that affect antenna performance

of the 6255/6255i/6256/6256i, and discusses methods for correction of these failures.

Whip Antenna

Check the following minimum visual quality standards of the whip assembly:

• No physical cracks or mechanical defects.

• No excess oil, dirt, or particles appear on the parts.

• Whip cap and sheath over the mold parting line (flash or offset) is less

than 0.1 mm.

• NiTi extrusion must completely cover the NiTi wire. No uncovered NiTi wire can

be seen from the tube side.

• Proper printing is present (found on the plastic connector).

• Whip cap must be perpendicular to the NiTi wire (maximum of 5°).

• Antenna straw must not appear twisted, cracked, bent, or discolored.

• No gate flash greater than 0.1 mm anywhere on the assembly.

• Feed contact must appear at a 45-degree angle and must be free from damage,

deformation, or unusual bending.

• Straw must be approximately 5.0mm from the end of the split bottom stop.

Figure 1: Whip antenna assembly

Cap.

Stubby tower

Connector

Feed contact

Straw.

Telescopic tube

Bottom stopper