User Guide

Bluetooth and FM Radio Troubleshooting

Introduction to Bluetooth/FM radio troubleshooting

Bluetooth/WLAN antenna

The BT RF signal is routed from BTFMRDS2.0 trough the WLAN module to the shared WLAN/BT/GPS antenna

in the phone's top side on B cover. The antenna has two resonator for BT/WLAN ISM band and also GPS band

and antenna is conducted with a feed (spring) on PWB.

Introduction to Bluetooth/FM radio troubleshooting

The Bluetooth and FM radio are combined in the same ASIC, so both features are checked when

troubleshooting.

The following problems can occur with the Bluetooth and FM radio hardware:

Symptom Problem Repair solution

Unable to switch on Bluetooth on

phone user interface.

Open circuit solder joints or

component failure of BTH/FM

ASIC/module BB ASICs or SMD

components.

Replacement of engine.

Able to send data file to another

Bluetooth device, but unable to

hear audio through functional

Bluetooth headse.t

Open circuit solder joints or

component failure of BTH/FM

ASIC/module BB ASICs.

Replacement of engine.

Able to switch on Bluetooth on

phone user interface, but unable

to detect other Bluetooth devices

Open circuit solder joints or

Pogo Pins not making contact

with c-cover.

Repair of antenna circuit or

replacement BT/WLAN/GPS

antenna.

RM-412; RM-413

BB Troubleshooting

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