About Aneng DMM Multimeter Calibration adjustment ?

[Kiriakos GR]

This is not actually a topic with a free of charge technical advice.

I did discover a few messages posted by people whom got Low-End Aneng DMM, this not working properly out of the box. 
These third-world buyers,  while they did receive a refund from AliExpress,  they still insist asking for help within tech forums, of how they can perform Calibration adjustment.

Here is my Free of charge, message to them.
When you buy trash, fully adjusted or not, this is trash.
At electronic devices, and especially at multimeter, these considered as precision electronics, when there is a production line failure, this is not repairable by adjustment.
 
The Chinese people they are not that stupid, them to aloud you to keep the problematic product, and to hand over to you, a refund.

 

[overvolt]

The Chinese people they are not that stupid, them to aloud you to keep the problematic product, and to hand over to you, a refund.

I do wonder of how Fluke and Keysight, both handle the PCB that they remove / replace under product "repair" ?
Because these are valuable "trash"  loaded with high quality components    

[Kiriakos GR]

I do wonder of how Fluke and Keysight, both handle the PCB that they remove / replace under product "repair" ?
Because these are valuable "trash"  loaded with high quality components

The only fact, this is that they are not selling them on eBay