Thank you for the prompt. I have made the necessary changes to the image.
Thank you TOM for your prompt. I have modified the image.
There is indeed a type of power indicator IC chip that requires pressing the switch to display. I chose a simple one, it's not a big problem, the battery can be used for a long time.
Also, please let me know if anyone is interested. The remaining 4 PCBs can be given away for free.
You could just put the push button switch in series with that IC. You could also use high-efficiency LEDs and increase R14 dramatically. You hardly need any current to make an LED glow bright enough to see it. As long as you're not planning to use it as a flashlight... 🙂
But yeah... Doing nothing is an option too.
Tom
@zincho Please post in English and/or use a translator if necessary,
感谢你做技术验证，22NF消减了高频，原始的MCA10在输入和输出的RCA连接器上都并联了22NF的电容器。这也是重建它的原因之一，重建的PCB适合任意修改，我附上一些原始的图片。
Thanks for the technical verification, 22NF attenuates high frequencies, the original MCA10 had 22NF capacitors in parallel on both the input and output RCA connectors. This is also one of the reasons for rebuilding it. The rebuilt PCB is suitable for any modification. I attach some original pictures.
感谢你做技术验证，22NF消减了高频，原始的MCA10在输入和输出的RCA连接器上都并联了22NF的电容器。这也是重建它的原因之一，重建的PCB适合任意修改，我附上一些原始的图片。
Thanks for the technical verification, 22NF attenuates high frequencies, the original MCA10 had 22NF capacitors in parallel on both the input and output RCA connectors. This is also one of the reasons for rebuilding it. The rebuilt PCB is suitable for any modification. I attach some original pictures.