info:
https://www.philips.co.uk/c-p/HTL5140B_ ... ar-speaker
I had this sound-system together with a Sony TV from my sister with the remark that the (wireless) sub-woofer not always works.
Actually it only worked for about 4 to 5 minutes then it went off and never went on again.
The sub-woofer info:
Inside the sub-woofer a 2 prints, a power supply and a receiver/amplifier print.
Receiver/amplifier print:
Upper left the WiFi receiver (WPA122xxx) and its antenna cable, and on the right a white connector for all powers from the power supply PCB.
Sub-woofer has 2 amplifier IC's: TAS5538 (pre-amp) and TAS5352A (last one with a rather big heat-sink).
TAS5538:
TAS5352A:
Clearly 2 holes to attach the heat-sink.
Tested the power supply, if all required voltages were applied, which were all there.
And always check for expanded capacitors:
But those were all fine.
Ordered a new TAS5352A (eBay, AliExpress?) and hot-air-soldered the new TAS5352A in it's place.
Until now the sub-woofer works as desired.
DG.