Rf Connector Failure - Nokia 7088 Troubleshooting Manual

7088 (RM-219)
Antenna Description and Troubleshooting

RF Connector Failure

The RF connector fails when it does not properly connect the RF input terminal to
the RF output terminal during the SMT. If this happens the antenna gain degrades
by 25 dB. Check this by testing the resistance value between the RF input and RF
output ports of the RF connector and see if the value is close to zero. If the RF input
is not connected properly to the RF output, replace the RF connector.
Note: Perform the resistance value test without a RF cable attached to the RF
connector. Because the RF connector is also a switch, the RF output is
disconnected from the RF input when a RF cable is inserted into the RF connector.
RF input terminal – connect to duplexer.
RF output terminal – connect to the antenna pad through antenna
matching circuit.
RF connector terminal – connect to a RF coaxial cable.
Note:
• MSM6025 is underfilled and cannot be replaced.
• Memory IC is underfilled and cannot be replaced.
• The Baseband Shielding Cover Assy and RF Shielding Cover cannot be
reused after removal.
• After using the heatgun, replace the domesheet
Page 6 © 2006 Nokia Corporation
RF output terminal
RF input terminal
Figure 4: RF input / output terminal
RF input terminal
Company Confidential Issue 12/2006