Short version: Today I have a BV 10-46 with a fully functional DVB-HD module.
Long version:
Loosened the six screws and lifted off the front frame as described in the service manual.
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The marked panel had to come off. 13 T10 screws.
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The DVB-HD module. Two connectors, J7 and J18. I did not remember where they should be connected. I later discovered that a short RJ45 connection from the top of the card to the bottom connection panel had gone missing. Solved by inserting a short ethernet patch cable. It will be available should the need arise without having to dismantling the TV.
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Connector J 7 in the middle of the picture.
The DVB module goes into the open space to the left of connector J7. When the picture was taken, I had yet to remove the blind lid in the bottom.
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Marked position for J 18.
When everything was connected and re-assembled, I launched the service menu -- DVB service -- and changed DVB connected to YES.
After a restart of the TV, all DVB-services I expected are now available to me.
Sverre