Tamiya type 10 gun elevation problems

[Mykola Muntian]

When I assembled the tank for the first time, there were no problems with the gun elevation, calibrated it, and everything was according to the instructions, the second time when I partially disassembled the turret to cut a niche in the plastic pan and collected the stench, for some reason it stopped dropping implement, began to change the position of the lever and noticed that it generally decreased the angle of raising and lowering the implement, calibration does not help, when scrolling through the calibration at some point the implement moves in the opposite direction. I would really appreciate your help, I really don't understand what's going on.

[Mykola Muntian]

I calibrated it so that the gun would be horizontal again, but after turning on the stabilization mode, it again refused to lower, and the elevation angle remained the same small