Elecraft K1BKLTKT LCD Mod Kit - Manual (Page 6)

If you find the illumination to be too dim (or too bright), select an appropriate value resistor and
replace the resistor originally chosen and installed. Repeat this step to check for acceptable
backlighting.
26. When you are satisfied with the level of backlighting, you may now proceed to solder the pins of
the LCD into place. BE SURE to double-check the orientation of the LCD display on the PC
board before you solder any pins, and then hold the LCD display up against the backlight while
soldering two diagonally opposed pins of the display, to hold the LCD in place while the rest of
the pins are soldered.
27. Temporarily reinstall the Front Panel PC board into the K1, connect power, turn the radio on,
and confirm that all functions are fully operational before you continue.
28. Reattach the Front Panel PC board to the front panel of the radio, and then reinstall the front
panel assembly, keycaps, and knobs back onto the radio.
This completes the K1 LCD backlight modification.