In this part we will commence assembly on the keypad half of the operator interface. As such, you will need 6 of the 330 ohm resistors, 2 of the 10k ohm resistors, the mode switch, and of course, the keypad circuit board.
Obtain the keypad circuit board. We will be populating it with components over the next steps.
Insert the 6x 330 ohm resistors into R1, R2, R3, R4, R5, R6. Twist the leads together to keep them in place when flipping the board.
Ensure the resistors are flush with the board after flipping. Using your soldering iron, apply solder to the pads of the resistors.
Cut the leads of the resistors with diagonal cutters. Then, flip the board over.
Insert the 2x 10k ohm resistors into R14 and R15. Twist the leads together to keep them in place when flipping the board.
Ensure the resistors are flush with the board after flipping. Using your soldering iron, apply solder to the pads of the resistors.
Cut the leads of the resistors with diagonal cutters. Then, flip the board over.
Insert the mode switch into S8.
Here is a look at the orientation that the mode switch should be in. The black extrusion should be facing the bottom edge of the keypad circuit board.
Apply tape to the switch, then flip the board.
Ensure the switch is flush with the circuit board. Using your soldering iron, solder the pads of the switch. Then, flip the board.
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