Nokia RM-579 Service Manual page 107

RM-578; RM-579
RF troubleshooting
FM Transmitter Antenna Test
The FM transmitter antenna can be checked by reading the 'Antenna Tuning Values' displayed in the FM
Transmitter Test display in Phoenix.
Steps:
1 Connect data cable to phone including FM transmitter antenna.
2 Start Phoenix service software.
3 Choose File → Scan Product.
4 Choose Testing → FM transmitter Test
5 Set the Tx power to 118uV
6 Set frequency to near the bottom of the band (90MHz)
7 Press 'Read' button and record 'Antenna Tuning Value'
8 Set frequency to near the top of the band (103MHz)
9 Press 'Read' button and record 'Antenna Tuning Value'
The default value (displayed when there is no antenna present) is 0x00. If both values are 0x00 this indicates
there is a faulty antenna, or poor connection between the antenna and BTHFM ASIC.
The test limits for the antenna tuning varactor value are product specific.
Issue 3 COMPANY CONFIDENTIAL Page 4 –23
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