Symptom:

The radio turns on normally. However, it is not possible to tune to any station. When a station is found, it does not correspond to the correct station. Also that the station keeps running away. The same symptom occurs on FM and AM (LW / MW and SW). The receiver is inoperative.
My solution: replacement of all electrolytic capacitors. However, you can try to replace only the C69 and C127. Check that before try to replace all capacitors.


Other projects:

1. [PU2CLR Si4735 Library for Arduino]([ Ссылка ]). This library was built based on “Si47XX PROGRAMMING GUIDE; AN332” and it has support to FM, AM and SSB modes (LW, MW and SW). It also can be used on all members of the SI47XX family respecting, of course, the features available for each IC version;
2. [PU2CLR SI4844 Arduino Library]([ Ссылка ]). This is an Arduino library for the SI4844, BROADCAST ANALOG TUNING DIGITAL DISPLAY AM/FM/SW RADIO RECEIVER, IC from Silicon Labs. It is available on Arduino IDE. This library is intended to provide an easier interface for controlling the SI4844.
3. [PU2CLR AKC695X Arduino Library]([ Ссылка ]). The AKC695X is a family of IC DSP receiver from AKC technology. The AKC6955 and AKC6959sx support AM and FM modes. On AM mode the AKC6955 and AKC6959sx work on LW, MW and SW. On FM mode they work from 64MHz to 222MHz.
4. [PU2CLR KT0915 Arduino Library]([ Ссылка ]). The KT0915 is a full band AM (LW, MW and SW) and FM DSP receiver that can provide you a easy way to build a high quality radio with low cost.
5. [PU2CLR BK108X]([ Ссылка ]). The BK1086 and BK1088 are DSP receivers from BAKEN. The BK1088 is a BROADCAST FM and AM (LW, MW and ) RECEIVER and BK1086 is a subset of the BK1088 (it does not have LW and SW acording to the Datasheet).
6. [PU2CLR RDA5807 Arduino Library]([ Ссылка ]). The RDA5807 is a FM DSP integrated circuit receiver (50 to 115MHz) with low noise amplifier support. This device requires very few external components if compared with other similar devices. It also supports RDS/RBDS functionalities, direct auto gain control (AGC) and real time adaptive noise cancellation function.
7. [PU2CLR SI470X Arduino Library]([ Ссылка ]). It is a Silicon Labs device family that integrates the complete functionalities for FM receivers, including RDS (Si4703).

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