Cdma Or Gps Rf Connector Failure - Nokia RM-11 Series Troubleshooting Manual

CC Technical Documentation
If the Internal Hands Free (IHF) speaker pads are obstructed, removed, or covered, then
the IHF speaker will not produce sound. The antenna PCS gain will be degraded by about
2 dB. If corrosion is present or the pad is missing, replace the PWB and phone. If either
pad is obstructed or covered, clear or clean the pad.

CDMA or GPS RF Connector Failure

CDMA and GPS use the same type of RF connector. The RF connector could fail by not
connecting the RF input to the RF output of the RF connector. If this happens to the
CDMA RF connector, then the antenna gain will degrade by about 25 dB. If this happens
to the GPS RF connector, the GPS antenna gain will degrade by about 20 dB. Test for DC
conductivity between the RF input and RF output of the RF connector.
Perform the DC conductivity test without any cable attached to the RF connector.
Because the RF connector is also a switch, the RF output will be disconnected from the
RF input when a cable is inserted into the RF connector. When a cable is not inserted, the
RF input is connected to the RF connector. The locations of both RF connectors are
shown in Figure 6.
• CDMA RF input — Connects to the duplexer
• CDMA RF output — Connects to the antenna pad through vias
• GPS RF input — Connects to the GPS ceramic filter output
• GPS RF output — Connects to the GPS antenna matching circuits
• RF connector — Connects to the coaxial cable
If the RF input is not connected properly to the RF output, replace the RF connector.
Issue 2 09/2005
©2005 Nokia Corporation
Troubleshooting - Antennas
Confidential
RM-11
Page 7