Velodyne CHT-12 service manual and/or help

[Nickthevoice]

Hi !

I Search for service manual of velodyne CHT-12 subwoofer

or

If Anybody have I tips about this trouble I have normal sound un the subwoofer for 2 secondes after that nothing ans no big humm noise when I short the input.

[thm_w]

Did you measure voltages/ripple?
Check for blown/bad caps?
Is servo coil ok? (I think it has one https://www.rythmikaudio.com/technology.html)

I don't know if this is relevant: https://www.diyaudio.com/community/threads/velodyne-cht-headache.407493/
https://elektrotanya.com/velodyne_cht-8_cht-10_sch.pdf/download.html

[Nickthevoice]

Thank you !