Problem on key and LCD
2019-11-06

LCD backlight turns on but display nothing

A. Check whether the LCD cable connect well, EXP1 on LCD screen has connected to EXP1 on the control board and EXP2 on LCD screen has connected to EXP2.

B. Exchange the two LCD cables and test again.

C. Upload firmware and test again.

D. Replace a new LCD cable and test again.

LCD display normal but the button (knob) is not response

A. Check whether the LCD cable connect well.

B. Check whether keypads have been broken.

C. Check whether the devices on PCBA (keypad, socket, resistance) have bad soldering. If yes please replace it.

LCD show error characters

A. Check the power supply grounding.

B. Don‘t tie the LCD screen to the other lines (especially the motor line) and let it be alone.

C. Check whether the LCD cable connect well.

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Problem on key and LCD2019-11-06

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Problem on key and LCD
2019-11-06