Nokia N900 Service Manual

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Bluetooth/FM radio component layout and test pointsFigure 13 BT/FM component layoutThe Bluetooth antenna is product specific (antenna integrated into phone B cover). On phones with WLAN,the Bluetooth RF signal is routed through a WLAN front-end module and a shared Bluetooth / WLAN antennais used. The FM RF signal is routed through a product specific FM antenna matching circuit to the phoneheadset connector. The FM radio audio signal is routed to the headset connector through the BB ASIC sharedby the phone audio functions.Bluetooth BER testPrerequisitesJBT-9, or SB-6 Bluetooth test box (BT-box) is required to perform a BER test. If a BT-box not available Bluetoothfunctionality can be checked by transferring a file to another Bluetooth phone.Steps1. Connect data cable to phone.2. StartPhoenix service software.3. Choose File → Scan Product.4. Choose Testing → Bluetooth LOCALS .5. Locate the BT-box serial number (12 digits) found in the type label on the back of the JBT-9, or SB-6Bluetooth test box.6. In the BluetoothLOCALS window, write the 12-digit serial number on theCounterpart BT DeviceAddress line.7. Place the BT-box near (within 10 cm) of the phone and click Start BER Test.RX-51BB TroubleshootingIssue 1 COMPANY CONFIDENTIAL Page 3 –49Copyright © 2009 Nokia. All rights reserved.