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AM-FM Stereo Tuner TU-S707X ( Sansui )
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Fig.1 TU-S707X
Trouble | Cause | Repair |
No FM sensitvity. | The capactance of a trimmer capacitor of the 1st L.O. tunk circuit is decreased out. | Replaced the trimmer capacitor. |
Memories
were all disapeared in a week. |
Increased Leakage current of a chemical capacitor attatched to the backup battery. | Replaced the chemical capacitor to a film capacitor. |