Fm Radio Test - Nokia RH-34 Series Technical Documentation Manual

CCS Technical Documentation
Stereo Audio output signal are fed to Stereo Amplifier. Volume control of the FM audio
signal is made by circuitry inside the amplifier. Amplified audio signal is fed to headset or
IHF speaker. Headset is also used as antenna input for the radio.

FM Radio Test

To hear the FM radio, you first connect headset to Tomahawk or UHJ ports because the
headset will be an FM radio antenna. And you have to connect headset to UHJ port to
control the FM radio by using Phoenix. But if you connect a headset (such as HDS-3) to
Tomahawk connector, then you can't control the phone because you've already occupied
the connection port (Tomahawk), so in this case you have to have jumper wires on pro-
duction test points (Fbus Tx/RX,GND).
Input signals to FM radio
After connecting a headset to UHJ port to control the phone through Phoenix, you can
see below signals by turning on the FM radio in Phoenix. FM radio menu is under RF in
Phoenix.
CHECK BELOW FOUR SIGNALS WHETHER THESE ARE CHANGED AS BELOW
FMClk — Test Point (FM04) : 32KHz/1.8V
FMWrEn — Test Point (FM03) : Write enable at 1.8V
FMCtrlClk — Test Point (FM02) : Control clock at 1.8V
FMCtrlDa — Test Point (FM01) : Control data at 1.8V
Issue 1 11/2003 Confidential
©2003 Nokia Corporation
Troubleshooting - Baseband
RH-34
Page 23