We use TAS5630 chip made a 2.1 power amplifier board. After connecting the sound source, power amplifier and 2.1 speakers, there is no sound in the speaker every time when it is turned on. We must extract the speaker once in the power on state and then plug it in then the speakers have sound. In addition, if we don't do anything to the speakers, the sound will appear for one second when the power is turnning off.
If only conected the subwoofer, there had sound in the subwoofer. If connected with 2.1(all the speakers), there is no sound in any speaker. We don't know why like this. and how to fix it? Please help us.
Please check the PCB circuit diagram in the attachment. Thank you very much.MICDO7GF.PCB