Module No. 5635

Viewing the Face in the Dark

The face of the watch can be illuminated for viewing in the dark.

To illuminate the face manually

Pressing (L) turns on illumination.

  • Illumination will turn off automatically if an alarm starts to sound.

Using Auto Light

If Auto Light is enabled, face illumination will turn on automatically whenever the watch is positioned at an angle of 40 degrees or more.


Configuring the Auto Light Setting

Holding down (L) for at least three seconds in the Timekeeping Mode toggles Auto Light between enabled and disabled.

  • [LT] is displayed while Auto Light is enabled.
  • If you do not disable it manually, Auto Light remains enabled for approximately six hours. After that, it becomes disabled automatically.

Specifying the Illumination Duration

You can select either 1.5 seconds or three seconds as the illumination duration.

1.Enter the Timekeeping Mode.

2.Hold down (D) for at least two seconds. Release the button when the name of the currently selected Home City appears on the display.


3.Press (E) three times so [LT] is displayed.

4.Press (A) to toggle between the two illumination duration settings.

[1]: 1.5-second illumination

[3]: 3-second illumination


5.Press (D) twice to exit the setting screen.