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故障现象 一台爱华HS-J45/T320型高级随身听,收音正常,用磁带放音时,放出的声音时有时无。另外,用该机录好音的磁带在其它正常的录音机上重放时,放出的声音也时有时无。 分析与检修 爱华HS-J45/T320型随身听由8块集成电路所构成,如图1所示。这8块集成电路是:IC1(TA8158F)为FM波段收音高放电路;IC2(TA8109AF)为AM波段收音高放电路和AM/FM中频放大电路;IC3(TA7373F)为立体声解码电路;IC201(TK11821)为选台集成电路(图中未画);IC4(CX20023)为单片录放音集成电路;IC5(BA1102FS)为
Trouble phenomenon A Epworth HS-J45 / T320-type advanced Walkman, normal radio, tape playback, the sound emitted sometimes. In addition, the machine used to record good audio tape in other normal voice recorder playback, the release of the sound sometimes from time to time. Analysis and Maintenance Epworth HS-J45 / T320 Walkman consists of eight integrated circuits, as shown in Figure 1. IC8 (TA8109AF) is a AM high frequency discharge circuit and AM / FM IF amplifier circuit; IC3 (TA7373F) for the stereo decoder circuit; IC201 (TK11821) ) For the selection of integrated circuits (not shown); IC4 (CX20023) for monolithic audio and video integrated circuits; IC5 (BA1102FS) for