Nokia 2270, 2272, 2275, 2285 Service Manual 8 anttrouble
CCS Technical Documentation
RH-3 Series Transceivers
Troubleshooting — Antenna
Issue 1 06/2003 Confidential Nokia Corporation
RH-3
Troubleshooting — Antenna CCS Technical Documentation
Page 2 Nokia Corporation Confidential Issue 1 06/2003
RH-3
CCS Technical Documentation Troubleshooting — Antenna
Contents
Page No
Troubleshooting - Antenna ............................................................................................ 5
Whip Antenna ..............................................................................................................5
Visual Quality Requirements.................................................................................... 5
PIFA Antenna ..............................................................................................................6
Visual Quality Requirements.................................................................................... 6
Failures and Corrective Measures.................................................................................. 8
Appearance of Phone ...................................................................................................8
Antenna Position into D-cover.................................................................................. 8
Internal Antenna ..........................................................................................................9
Damaged RF Feed or Ground Pins ........................................................................... 9
Wrong Internal Antenna Installed........................................................................... 10
Obstructed RF Feed and/or Ground Pads for the Main and GPS Antennas ........... 11
Broken or Missing Bottom Antenna Clip ............................................................... 12
Obstructed Whip Stopper........................................................................................ 12
Grounding of Display Frame................................................................................... 13
Misinstalled Whip................................................................................................... 14
Damaged Whips...................................................................................................... 15
Detuning Circuit for Bottom Antenna Clip............................................................. 15
Testing CDMA Antenna.............................................................................................. 15
Calibration Factors.................................................................................................. 15
Calibration Factor for Cell800 frequency ............................................................... 15
Measurement Procedure for Cell800/PCS1900 phones.......................................... 15
Testing GPS Antenna................................................................................................... 16
Calibration Factor for GPS...................................................................................... 16
Measurement Procedure for GPS Antenna ............................................................. 16
Issue 1 06/2003 Nokia Corporation Confidential Page 3
RH-3
Troubleshooting — Antenna CCS Technical Documentation
Page 4 Nokia Corporation Confidential Issue 1 06/2003
RH-3
Button
Button
Wire
Cap
Tube
CCS Technical Documentation Troubleshooting — Antenna
Troubleshooting - Antenna
This troubleshooting guide addresses potential failures that will affect antenna performance of the RH-3/RH-3P phone, and discusses methods for correction of these failures.
Whip Antenna
Visual Quality Requirements
Following are the minimum acceptable visual quality standards of the RH-3/RH-3P whip
assembly. This information may be used as an inspection guideline.
• No physical crack or any mechanical defects.
• No oil, dirt or particles are presented on parts.
• Button parting line (flash or offset) less than 0.1 mm.
• Color match to code Nokia Jonathan Gray (GY7999).
• Wire tube must completely cover the NiTi wire. No uncovered NiTi wire
can be seen from the tube side.
• No wire burr gr eater than 0.1 mm can be se en from the stopper.
• Check if the proper pr inti n g i s pres en t (ca n be found on the plastic cap).
• The button must be perpendicular to the tube. This can be interpreted
as maximum of 5°.
No wire burr greater than
0.1 mm can be seen
outside of the stopper.
Figure 1: Whip Assembly
Issue 1 06/2003 Nokia Corporation Confidential Page 5
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