Okay, I disassembled it and have a few findings:
*There are 4 boards inside the camera, one on rear, one on front, one on bottom, and one on side, they are plugged together by connectors similar to IDE for laptops, but smaller. There are also some smaller connectors with only 2 pins.
*The sensor is made by Boeing company

And it have a vacuum tail and a round surface, and a valve-style pin layout.
*The shutter is inside the lens mount, not on board.
*There's a biggest chip on the bottom, with some material filled the gap to the case, so the tripod mount may also function as a heatsink I guess.
So it's a interesting tear down to me, but the sensor is not adjustable, so I reassembled it back and still have to deal with the stiff lens.