Fm Radio Troubleshooting; Fm Radio Schematic; Fm Radio Testing - Nokia 6275 Rf Description And Troubleshooting

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FM Radio Troubleshooting

FM Radio Schematic

The following schematic is for general reference only. See the Schematics chapter for a
detailed version.
Antenna
matching

FM Radio Testing

Use the following steps to troubleshoot the FM radio while using a Pop-port headset.
1. Connect the Pop-port headset (HDS-3) to the bottom connector.
2. Select the Menu > Media > Radio from the mobile terminal user interface.
3. In an FM radio broadcast coverage area, set a local radio channel by scanning
automatically using the Automatic tuning option. (Scanning up and down the
channels by pressing the "Up" and "Down" key respectively).
4. If no channel could be found, inspect all the components in the FM radio
circuitry.
• If no problem is found visually, check for the LO signal at L6102
(LO frequency range is 150 to 217 MHz).
• If no LO is found, replace the FM radio IC.
5. Listen for sound out of the headset.
• If there is a signal present, continue to step 6.
• If there is no static sound present, inspect all FM Radio circuits on the PCB
and refer to the "Audio" section of the Baseband Description and
Troubleshooting chapter for more information.
6. Disconnect the Pop-port headset and connect the universal headset to the UHJ
(top connector).
Issue 1 - September 2006
RF Description and Troubleshooting
FM radio IC
Figure 55: FM radio schematic
Company Confidential
6275/6275i (RM-154)
Loop filter and VCO
Audio output
Page 55