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一台夏普GF—800Z便携式收录机发生了音轻、有杂声等故障,经检查发现系前置放大集成电路BA328损坏,当时手中无BA328。从手册中查其参数及有关应用电路得知,TA7352P同BA328十分接近,且指标均比BA328高,代换时只需把TA7352P⑨脚接地即可。另外也可用LA3161、UPC1228H、M51522、MB3106直接代换,效果均十分良好。顺便提一句,把此机的普通铝电解电容换为钽电容,效果也比较明显。
A Sharp GF-800Z portable tape recorder occurred tone light, noise and other failures, the inspection found that pre-amplifier integrated circuit BA328 damaged, when no BA328. Check the parameters from the manual and the application circuit that, TA7352P very close with the BA328, and indicators are higher than the BA328, substitution only need to TA7352P ⑨ foot ground. Also available LA3161, UPC1228H, M51522, MB3106 direct substitution, the effect is very good. Incidentally, the ordinary aluminum electrolytic capacitors for this machine replaced by tantalum capacitors, the effect is also more obvious.