MKS TFT28 and Arduino Mega 2560 (CH340G) Fix

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I recently resolved a problem related to the serial communication between an external display module called MKS TFT28 and a Chinese clone of the Arduino Mega 2560 board connected to the RAMPS connector AUX-1. After thoroughly examining the circuit including the CH340G USB UART chip, I pinpointed the cause of this issue. The fault lies in a bad application of the CH340G on the Arduino board. To correct this problem, it's necessary to remove resistors R10 and R11, then replace resistors R12 and R13 with 680-ohm components. A minor aesthetic drawback resulting from this modification is the malfunctioning of the RX and TX LEDs; however, this issue has no impact on the functionality of serial communication between the Arduino and external display module.