Troubleshooting - Antennas; Failures And Corrective Measures; Internal Antenna Not Installed Or Unplated Internal Antenna Installed; Stamped Contact Spring Clips Missing/Mis-Installed For Internal Antenna - Nokia NPD-4 Series Troubleshooting - Antennas

CCS Technical Documentation

Troubleshooting - Antennas

The NPD-4 handset features three antennas: the main CDMA internal antenna, the
extendable whip antenna, and the global positioning system (GPS) internal antenna.
This troubleshooting guide addresses potential failures that will affect the antenna per-
formance of the phone, and discusses methods for correction of these failures.

Failures and Corrective Measures

Internal antenna not installed or unplated internal antenna installed

A properly installed and plated 3585i antenna module is shown in Figure 1.
The antenna module consists of the main internal antenna, the whip antenna, and the
GPS antenna.
If the 3585i antenna module is missing, install one. If an unplated internal antenna is
installed, replace it with a properly plated internal antenna module.
If the internal antenna is not installed, the antenna gain will be degraded by more than
25 dB. This is also true if the GPS antenna is not installed. The main antenna and the GPS
antenna are tested with the CPL-X.

Stamped contact spring clips missing/mis-installed for internal antenna

Figure 2 shows the RF feed and ground stamped contact clips properly installed. If
either contact is missing or bent, replace antenna module with new antenna.
Issue 1 02/2003
Figure 1: 3585i Antenna Module installed
Nokia Corporation
Troubleshooting — Antennas
Confidential
NPD-4
Page 5