This post explains for the audio amplifier.
The Part Number is JRC386.
The function of this semiconductor is Low Voltage Audio Power Amplifier.
The package is DIP 8 Pin, SOP 8 Pin, SIP 8 Pin Type
Manufacturer: JRC
Preview images :
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Description
The JRC386 is an operational amplifier (op-amp) IC that was produced by New Japan Radio Co., Ltd. It is a dual operational amplifier that is designed for a wide range of applications, including audio amplification, filtering, and signal processing. The NJM386 has low noise and distortion, making it suitable for high-fidelity audio applications. Additionally, it is also known for its high output current and low power consumption, making it a popular choice for portable and battery-powered devices. […]
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Applications:
1. AM-FM radio amplifiers
2. Portable tape player amplifiers
3. TV Sound system
4. Line drivers
5. Ultrasonic drivers