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Citizen C390 - EL Internal Illumination; All-Reset

Citizen C390
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4544
15. All-Reset
When this watch indicates an abnormal display or does not function properly (no
display, alarm continues to sound, etc.) as a result of being subjected to the
effects of static electricity or strong impact and so forth, perform the all-reset
procedure described below.
Notes:
• The crown can only be operated to change the mode (crown 0 click
position).
• The buttons can only be used to change the city name (UP/DOWN).
• The EL light is not illuminated even if the button is pressed.
• The alarm tone does not sound even if the alarm is set.
• The chronograph stops measuring time even if measurement is in progress
and is reset.
• Although the destination timer tone does not sound even if measurement is
completed, measurement continues.
14. EL Internal Illumination
EL, which is the abbreviation for electroluminescence, is a phenomenon in
which light is emitted following the application of a voltage. This watch employs
a method whereby light is emitted by incorporating an EL substance in the
panel. EL illumination is turned on by pressing button (C).

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