User Guide

Nokia Customer Care Antenna Description and Troubleshooting

2118 (RH-77)

Introduction

This troubleshooting guide addresses potential failures that can affect antenna

performance of the mobile terminal, and discusses methods for correction of these

failures.

Internal Antenna is Missing

Figure 1: Chassis assembly

If no internal antenna is installed, the antenna gain is degraded by more than 25 dB.

• If the internal antenna is missing, install a new one.

• If the radiator looks obviously damaged, replace the internal antenna.

Damaged RF Feed Pin or Ground Pin

Figure 2: Top (left) and bottom (right) views of the 2118 (RH-77) internal antenna

If the RF feed does not touch the PWB, then the antenna gain will degrade by more than

25dB. If the ground pin does not touch the PWB, then the antenna gain may degrade

from 5—10 dB.

Replace the internal antenna if any of the following situations apply:

• Either the RF feed pin or ground pin are broken or bent such that either pin will

not touch the PWB

RF feed

IHF speaker

pins

Ground pin

RF shield

IHF speaker

pins

RF pin Ground pin

Spacer

IHF speaker

port

Ground pin RF pin

Radiator