Ihf Module; Obstructed Rf Feed And Ground Pads; Damaged Rf Connector - Nokia 6275 Antenna Description And Troubleshooting

Nokia Customer Care

IHF Module

The IHF module impacts the CDMA antenna performance. If there is any damage to the
IHF module, replace the acoustic module.

Obstructed RF Feed and Ground Pads

The CDMA antenna ground and feed pogo pins touch the PWB on ground and feed pads.
• If the main antenna feed pad is obstructed, removed, or covered, the CDMA
antenna feed pogo pin does not touch the PWB and the antenna gain degrades
by more than 15 dB.
• If the CDMA antenna ground pad is obstructed, removed, or covered, the ground
pogo pin does not touch the PWB and the antenna gain degrades by more than
5dB.
• If corrosion is present or the pads are missing, replace the PWB.
• If either pad is obstructed or covered, clear or clean the pads.
• If the CDMA antenna matching network is missing or damaged, replace the
component.
• If the PWB is permanently damaged, replace the PWB.

Damaged RF Connector

The CDMA RF connector could fail by not connecting the RF input to the RF output of
the RF connector. If this happens, the antenna gain degrades by about 15dB. You can
check this by testing for DC conductivity between the RF connector's RF input and
output.
Issue 1 - September 2006
Antenna Description and Troubleshooting
Figure 2: IHF module
Company Confidential
6275/6275i (RM-154)
GPS Antenna
Flex Strip on
side of IHF
Page 5