After the sale, as long as the customer is not particularly embarrassed, the engineers are trying to cooperate with the customer.
If every time I call the engineer, I just judge the problem and let others repair it privately, then I can understand your statement of 45.05 million. Your sentence: How can we repair your machine without accessories for this part? I think so. Now the maintenance of industrial equipment is the same as that of computers. If you change it, you change the board. No company will change the parts on the board, only the repairman has a good relationship with you and helps you privately. Moreover, the company will not send detailed on-board maintenance information to front-line maintenance engineers. Now that you have figured out which parts of the board have been replaced, go out and buy them. )
There is also a one-year warranty for the Korean standard machine. It's strange that your 20 10 machine is still under warranty on 20 12, unless you buy an extended warranty. If you are "difficult" by Han engineers, call them at 400-666-4000 and drive independently after sale. They specialize in finding fault with engineers, which I have learned.