Nokia rm193, 2865, 2865i Vari Antenna Description and Troubleshooting

Nokia Customer Care

2865/2865i (RM-193)

Mobile Terminals

Antenna Description and

Troubleshooting

ISSUE 2 - October 2006 Company Confidential ©2006 Nokia Corporation

2865/2865i (RM-193)
Antenna Description and Troubleshooting Nokia Customer Care

Contents Page

Introduction ..................................................................................................................................................... 3

Visual Quality Requirements ....................................................................................................................... 3

Failures and Corrective Measures.............................................................................................................. 3

Antenna Position ......................................................................................................................................... 3

Internal Antenna ..........................................................................................................................................4

Damaged RF Feed, Ground Pins, or IHF Speaker Pins ........................................................................4

Damaged GPS Antenna, Pins, or Heat Stake .......................................................................................5

Bluetooth Antenna ......................................................................................................................................6

Obstructed IHF Speaker, RF Feed, and Ground Pads .........................................................................6

Obstructed Bluetooth Antenna Pads .....................................................................................................7

Missing Main Antenna Matching Circuit ............................................................................................. 7

Missing BT Antenna Matching Circuit ..................................................................................................8

CDMA Or GPS RF Connector Failure ......................................................................................................9

Grounding the Display Shield and Frame .............................................................................................9

Page 2 Company Confidential ISSUE 2 - October 2006

2865/2865i (RM-193)

Nokia Customer Care Antenna Description and Troubleshooting

Introduction

The mobile terminal incorporates an internal antenna. This antenna arrangement is used
for AMPS/CELL and PCS frequency bands. The internal antenna assembly consists of a
Planar Inverted-F Antenna (PIFA) used for the cellular engine and an Inverted-F antenna
(IFA) used for the GPS engine, which is placed on the side of internal antenna body.

Visual Quality Requirements

Following are the minimum acceptable visual quality requirements of the internal
antenna assembly:

• Use gloves when handling antennas. Do not touch the antenna radiator with bare
hands.

• No visual cracks or mechanical defects.

• No oil, dirt, or particles are present on the parts.

• Align the radiator with the plastic housing.

• GPS antenna contacts must be inside the plastic housing.

• Radiator must be flat with no warping.

• All pins must be at the same level.

Failures and Corrective Measures

Antenna Position

The internal antenna is assembled into the B-cover as shown in Figure 1. If no internal
antenna is installed, the antenna gain will be degraded by more than 25 dB.

Antenna Module

Figure 1: B-cover assembly with Antenna module

If the internal antenna is missing, install one. If the radiator looks obviously damaged,
then replace the internal antenna.

ISSUE 2 - October 2006 Company Confidential Page 3