How do you set the clock on a Pioneer DEH-1600?

To set the clock, please follow the following steps

#1
Press and hold the "SRC/OFF" button on your Pioneer car CD player until the unit powers down. Note that the "SRC/OFF" button is located on the top left of the Pioneer car CD player.
#2
Press and hold the multi-control knob, located on the left side of the CD player. Hold the multi-control knob until the words "Clock Set" appear on the CD player's display.
#3
Turn the multi-control knob until the words "Clock Set" are highlighted. Press the multi-control knob on your Pioneer car CD player to enter the clock setting mode.
#4
Turn the multi-control knob to highlight the "Hours" option. Press and hold the multi-control knob until the hours-place digits begin to flash. Rotate the multi-control knob until the desired value is displayed. Press the multi-control knob on your Pioneer car CD player to save your changes.
#5
Turn the multi-control knob to highlight the "Minutes" option. Hold the multi-control knob until the minutes-place digits begin to flash. Rotate the multi-control knob until the desired minutes value is displayed. Press the multi-control knob to save your changes and end the clock-setting process.

Hope this might help
Thanks