I can't see the screw for adjusting the air pressure in the fourth cycle of the new J6P drying oven. Which god knows where to adjust the air pressure? My air pressure is as high as eight. I want to ad

I can't see the screw for adjusting the air pressure in the fourth cycle of the new J6P drying oven. Which god knows where to adjust the air pressure? My air pressure is as high as eight. I want to adjust it. There is a screw-shaped head on the side or under the dryer, which can be twisted with a screwdriver or a blade;

When screwing clockwise, the pressure increases; When screwing counterclockwise, the pressure decreases;

Whether it is suitable or not can be seen by the barometer on the instrument;

When the air pressure reaches the pressure of the pressure regulating valve, you can hear the exhaust sound of the dryer.

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