User Guide

Nokia Customer Care Troubleshooting Instructions
Company Confidential RH-30/RH-31
Issue 2 11/2004 © 2004 Nokia Corporation. Page 61
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
c
, 98,000 MHz
•Deviation, ∆ f, 75 kHz
• Modulating frequency f
m
, 1,000 kHz (RF generator internal)
• FM stereo, mode R=L, pilot state ON