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Nokia NPD-4 Series Troubleshooting - Antennas

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CCS Technical Documentation
NPD-4 Series Transceivers
Troubleshooting — Antennas
Nokia Corporation
Issue 1 02/2003
Confidential

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Summary of Contents for Nokia NPD-4 Series

  • Page 1 CCS Technical Documentation NPD-4 Series Transceivers Troubleshooting — Antennas Nokia Corporation Issue 1 02/2003 Confidential...
  • Page 2 NPD-4 Troubleshooting — Antennas CCS Technical Documentation Nokia Corporation Page 2 Confidential Issue 1 02/2003...

  • Page 3: Table Of Contents

    GPS antenna C-clips bent or missing................ 6 Bottom antenna clip bent or missing................. 7 Missing whip ......................7 Ungrounded display frame ..................8 Testing CDMA Antenna ................... 9 Testing GPS Antenna ....................9 Continuity Test......................10 Nokia Corporation Issue 1 02/2003 Confidential Page 3...
  • Page 4 NPD-4 Troubleshooting — Antennas CCS Technical Documentation Nokia Corporation Page 4 Confidential Issue 1 02/2003...

  • Page 5: Troubleshooting - Antennas

    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. Nokia Corporation Issue 1 02/2003 Confidential...

  • Page 6: Gps Antenna C-Clips Bent Or Missing

    If either of the C-clips is bent or missing, install new ones on the PWB. Also check the GPS antenna contact dimples in case of peeled off metallization. Figure 3: Stamped contact clip for GPS installed on PWB Nokia Corporation Page 6 Confidential...

  • Page 7: Bottom Antenna Clip Bent Or Missing

    Figure 5 shows a properly installed whip antenna. The whip will perform 2 dB better than the internal antenna in free space. The whip will perform up to 3 dB better than the internal antenna in talk position. Nokia Corporation Issue 1 02/2003 Confidential...

  • Page 8: Ungrounded Display Frame

    The D cover and light guide have snaps near the display frame ground positions. Make sure they are locked in position for ESD protection. These snap features help maintain display leg contact with the PWB. Nokia Corporation Page 8 Confidential...

  • Page 9: Testing Cdma Antenna

    Calibration Factor for GPS GPS test mode 3: GPS receiver will be fed with CW signal. With –110 dBm signal level on RF connector [(-110 dBm + cable loss) at signal generator output] GPS receiver should Nokia Corporation Issue 1 02/2003 Confidential...

  • Page 10: Continuity Test

    Test there is 0 Ω resistance between Internal antenna and Battery ground clip. Make same test between GPS antenna and Battery ground clip. If there is no contact to ground, check antenna contacts. Nokia Corporation Page 10 Confidential Issue 1 02/2003...
  • Page 11 NPD-4 CCS Technical Documentation Troubleshooting — Antennas Figure 7: Back and top of Expedition antenna on D-cover Nokia Corporation Issue 1 02/2003 Confidential Page 11...
  • Page 12 NPD-4 Troubleshooting — Antennas CCS Technical Documentation Nokia Corporation Page 12 Confidential Issue 1 02/2003...

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