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NPL-3
Troubleshooting Instructions
Components L103, L104, L105, C107, C108, C109, C117, C162, C163, R164, R165, R166
and R167 are not shown in the picture. Those components are placed in baseband sec-
tion, near audio amplifier N150.
FM Radio troubleshooting diagram
Notes to "FM Radio troubleshooting diagram"
Use 1MHz 1X probe when measuring Audio and clock signals with oscilloscope.
Use active RF probe when measuring frequencies with spectrum analyzer.
Note 1. RF test signal parameters:
- Amplitude, A, –67.0 dBm
- Carrier frequency, f
- Deviation, ,f, 75 kHz
- Modulating frequency f
- FM stereo, mode R=L, pilot state ON
Page 50
Company confidential
Figure 49: FM radio block layout.
, 98,000 MHz
c
, 1,000 kHz (RF generator internal)
m
ãNokia Corporation.
CCS Technical Documentation
Issue 1 3/03
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Troubleshooting
