MK110 not working

Kits
1

Just assembled a kit mk110 but it will not work…
I think that no mistake was done while soldering the components.
I attach some photos.
Please help me providing information about:

  1. Is there a minimum watt limit in load in order to work? I tried 7watt and 25watt incadescent bulbs.
  2. Is there a way to test it applying dc volts in LS connector (batery???)? Is there any specific polarity connection needed in LS connector??
  3. Are there any measurements to be done on PCB to test it for proper operation or any component failure?

I tried it in a loud enough amp with volume max…
Thank you in advance.
Ilias

mk110
mk1101243×422 73.9 KB

2

Finally it works…but needs too loud music!!! I have seen videos with christmas light and lower music so I thought it didn’t work… Is it real that changing a resistor becomes for sensitive? Which resistor and in what range of ohms to test? What if I connect LS to both speakers in parallel??
Thank you again! Have a Happy New Year!