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CC Technical Documentation
RM-11 Series Transceivers
Troubleshooting - FM Radio
Issue 1 02/2004 Confidential ©2004 Nokia Corporation
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RM-11
Troubleshooting - FM Radio CC Technical Documentation
Contents Page
Troubleshooting - FM Radio.......................................................................................... 3
FM Radio Testing with Tomahawk Headset ...............................................................3
FM Radio Testing with UHJ Headset ..........................................................................4
Page 2 ©2004 Nokia Corporation Confidential Issue 1 02/2004
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RM-11
CC Technical Documentation Troubleshooting - FM Radio
Troubleshooting - FM Radio
The FM radio circuits are located on the bottom of the PWB, near the Tomahawk
connector.
Figure 1: FM radio circuits
FM Radio Testing with Tomahawk Headset
1. Connect the Tomahawk headset (HDS-3) to the Tomahawk connector (bottom
connector).
2. Select “Radio” from the phone’s User Interface Menu control.
3. Set a local radio station by selecting “Automatic Tuning” from the Radio Menu
and pressing the UP arrow.
4. Listen for sound out of the Tomahawk headset.
• If there is a signal present, continue with step 1 in the next section,
"FM Radio Testing with UHJ Headset".
• If there is no static or sound present, inspect all the FM radio circuits on the
bottom PWB layer and refer to the Troubleshooting - Baseband section of
this manual on audio amplifier troubleshooting.
Issue 1 02/2004 ©2004 Nokia Corporation Confidential Page 3
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RM-11
Troubleshooting - FM Radio CC Technical Documentation
FM Radio Testing with UHJ Headset
1. Disconnect the Tomahawk headset (HDS-3) from the Tomahawk connector and
connect the UHJ headset.
2. Select the “Radio” menu from the phone’s User Interface Menu control.
3. Set a local station by selecting “Automatic Tuning” from the Radio menu and
then pressing the Up arrow.
4. Listen for sound out of the headset.
• If there is a signal present, the radio is functioning properly.
• If there is no static or sound present, then inspect the FM radio, Baseband
circuits, and audio circuits. Consult the Troubleshooting - Baseband section
of this manual for audio troubleshooting.
Inspect
Bottom PWB layer
Top PWB layer
Figure 2: Bottom and top PWB layer inspection areas
Page 4 ©2004 Nokia Corporation Confidential Issue 1 02/2004
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