Fm Radio Troubleshooting Diagram; Notes To "Fm Radio Troubleshooting Diagram - Nokia RH-30 Series 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 section,
near audio amplifier N150.
ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn

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 , 98,000 MHz
c
∆
- Deviation, f , 75 kHz
- Modulating frequency f , 1,000 kHz (RF generator internal)
m
- FM stereo, mode R=L, pilot state ON