1. Connect the black terminal of the Digital Multimeter to the
ground of the supply source and turn the knob to 20V DC
voltage.
2. Make sure the notch of all the IC‟s including
microcontroller is correct.
3. Check the continuity and short circuit of the PCB's.
4. Provide supply of 12V to motor driver board from main
board
5. Check the voltages at pin o (output) of both 7805 and it
should be +5 volts on the boards
6. Check the voltage at pin 7 and 20 of the microcontroller it
should be +5 volts.
7. Check the voltage at pin 2 and pin 15 of the LCD, It should
be +5V