Hi all.
Newbie here. Coming to you for an advise.
I have an active subwoofer from ASW-Loudspeaker, Cantius AS 412 and it has no sound output.
Input values:
1) Subwoofer internally consists of 3 major PCBs: Standby power supply, filter/input PCB and amplifier PCB.
2) Power led is ON.
3) Signal detection works fine in Auto mode, once sound signal is coming in, filter PCB is enabling standby power supply to supply power to amplifier part.
4) Standby power supply has output voltage on both rails +/- 6.4V (however on PCB is written 12). Is +/- 6.4V okay for such applications? This power is supplied to filter PCB.
5) Filter PCB has cable connection supplying +/- power, ground, control and signal to amplifier board. Power on both rails is absent, as well as signal is silent, but control signal becomes active once audio input is detected.
So what is the issue here, too low voltage on standby power so op amps does not work properly on filter PCB thus not enabling power and signal further to amplifier PCB or something is wrong on filter PCB itself?
Some photos added for your reference.
Thanks!