Problem with hot air station LK852D-2

[khaledmus]

Hi, i have a hotair station LK852D-2 , and the problem is about the air flow is little and hardly to getout any air flow from it, i unfurtanitly replaced the potinmeter 500k ohm with new one, but it never solved the problem, and then i unsoldered from the board as you can see in the attached photo, and that make Some parts of the circuit diagram been damaged, and I need someone who has the same circuit diagram to provide me same photo of the diagram, especially the place where the 500 kΩ potentiometer switch is located( the place of 500k ohm potentiometer is indicated it with red arrow in the attached photo). is there any solution to the low air flow problem? What is the reason for that? Thanks in advance.

[stj]

show the pump/fan, it could be a mechanical issue

[Agent24]

Does it have an internal air pump, or a blower fan in the hand-piece?

[stj]

https://www.made-in-china.com/showro...n-LK852D-.html

pump Diaphragm

[khaledmus]

Does it have an internal air pump, or a blower fan in the hand-piece?

It has internal air pump

[khaledmus]

show the pump/fan, it could be a mechanical issue

There is no fan inside of it

[khaledmus]

https://www.made-in-china.com/showro...n-LK852D-.html

There is not any diagram of the pump, try to make sure of it.