Obstructed Rf Feed Or Ground Pads For Internal Antenna Or Ihf Speaker Pads - Nokia RH-57 Series Troubleshooting Manual

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If the wrong antenna is installed, install the correct one.
Figure 5: Bottom views of 3100 (left) and 2112 (right) antennas

Obstructed RF Feed or Ground Pads for Internal Antenna or IHF Speaker Pads

Figure 6: PWB layout of RF feed and ground pads and IHF speaker pads
If the RF feed pad is obstructed, removed, or covered, the RF feed pin will not touch the
PWB and the antenna gain will degrade by more than 25 dB. If the ground pad is
obstructed, removed, or covered, the ground pin will not touch the PWB and the antenna
gain may degrade by about 5—10 dB.
• If corrosion is present or the pad is missing, replace the PWB and the phone.
• If either pad is obstructed or covered, clear or clean the pad.
If the Internal Hands Free (IHF) speaker pads are obstructed, removed, or covered, the IHF
speaker will not produce sound.
• If corrosion is present or the pad is missing, replace the the PWB and the phone.
• If either pad is obstructed or covered, clear or clean the pad.
Issue 1 07/2004
Pad for ground pin
©2004 Nokia Corporation
Troubleshooting — Antenna
Pad for RF pin
IHF speaker pads
Company Confidential
2112 (RH-57)
Page 5