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Power Supply; Illumination; Alarms - Casio 5173 Operation Manual

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Operation Guide 5173
To configure countdown start time and auto-repeat settings
While the countdown start time is on the display in the
Countdown Timer Mode, hold down A for about three
seconds until the minute setting of the countdown start
time starts to flash. This is the setting mode.
If the countdown start time is not displayed, use the
procedure under "To use the countdown timer" to
display it.
C to move the flashing in the sequence shown
below, and select the setting you want to change.
Start time (minutes)
Start Time (Minutes)
Perform the following operations, depending on which setting currently is selected
on the display.
While the start time setting is flashing, use
While the auto-repeat on/off setting (
0N or 0FF) is flashing on the display,
press D to toggle auto-repeat on (0N) and off (0FF).
A to exit the setting mode.
The auto-repeat on indicator (
) will appear in the upper display while this
function is turned on.
Frequent use of auto-repeat and the alarm can run down battery power.


When an alarm is turned on, the alarm tone will sound
Alarm number
when its alarm time is reached. One of the alarms is a
snooze alarm, while the other four are one-time alarms.
You also can turn on an Hourly Time Signal that causes
the watch to beep twice every hour on the hour.
There are five alarm screens numbered
AL3 and AL4 for the one-time alarm, and a snooze
alarm screen indicated by SNZ . The Hourly Time
Signal screen is indicated by SIG .
All of the operations in this section are performed in the
Alarm Mode, which you enter by pressing C.
Alarm time
(Hour : Minutes)
To set an alarm time
In the Alarm Mode, use
D to scroll through the alarm screens until the one whose
time you want to set is displayed.
To set a one-time alarm, display alarm screen
AL2 , AL3 or AL4 . To set the snooze alarm,
display the SNZ screen.
is the hourly time signal setting.
The snooze alarm repeats every five minutes.
After you select an alarm, hold down
A for about three seconds until the hour
setting of the alarm time starts to flash. This is the setting mode.
This operation turns on the alarm automatically.
C to move the flashing between the hour and minute settings.
While a setting is flashing, use
D (+) and B (–) to change it.
A to exit the setting mode.
Alarm Operation
The alarm tone sounds at the preset time for 10 seconds, regardless of the mode the
watch is in. In the case of the snooze alarm, the alarm operation is performed a total
of seven times, every five minutes, or until you turn the alarm off.
Alarm and Hourly Time Signal operations are performed in accordance with the
current time in your Home City, as kept in the Timekeeping Mode.
To stop the alarm tone after it starts to sound, press any button.
Performing any one of the following operations during a 5-minute interval between
snooze alarms cancels the current snooze alarm operation.
Displaying the Timekeeping Mode setting screen
Displaying the SNZ setting screen
To turn an alarm on and off
Alarm on indicator
In the Alarm Mode, use
Snooze alarm indicator
A to toggle it on and off.
Turning on an alarm (
AL4 or SNZ ) displays the alarm on indicator
on its Alarm Mode screen.
In all modes, the alarm on indicator is shown for
any alarm that currently is turned on.
The alarm on indicator flashes while the alarm is
The snooze alarm indicator flashes while the
snooze alarm is sounding and during the 5-minute
intervals between alarms.
To turn the Hourly Time Signal on and off
In the Alarm Mode, use
Hourly time signal on indicator
Time Signal ( SIG ).
A to toggle it on and off.
The Hourly Time Signal on indicator is shown
on the display in all modes while this function is
turned on.
Auto-Repeat On/Off
D (+) and B (–) to change it.
AL1 , AL2 ,
AL1 ,
D to select an alarm.
AL1 , AL2 , AL3 ,
D to select the Hourly


An LED (light-emitting diode) illuminates the face of the
Auto light switch
watch for easy reading in the dark. The watch's auto light
on indicator
switch turns on illumination automatically when you angle
the watch towards your face.
The auto light switch must be turned on (indicated by the
auto light switch on indicator) for it to operate.
See "Illumination Precautions" for other important
information about using illumination.
To illuminate the display manually
In any mode (except a setting mode), press B to turn on
the illumination for about one second.
The above operation turns on illumination regardless of
the current auto light switch setting.
About the Auto Light Switch
Turning on the auto light switch causes illumination to turn on, whenever you position
your wrist as described below in any mode.
Note that this watch features a "Full Auto LED Light", so the auto light switch operates
only when available light is below a certain level. It does not illuminate the display
under bright light.
The auto light switch is always disabled, regardless of its on/off setting, when any
one of the following conditions exists.
While an alarm is sounding
While a signal receive operation is in progress
Moving the watch to a position that is parallel to the ground and then tilting it
towards you more than 40 degrees causes illumination to turn on.
Wear the watch on the outside of your wrist.
Parallel to ground
Always make sure you are in a safe place whenever you are reading the
display of the watch using the auto light switch. Be especially careful when
running or engaged in any other activity that can result in accident or injury.
Also take care that sudden illumination by the auto light switch does not
startle or distract others around you.
When you are wearing the watch, make sure that its auto light switch is turned
off before riding a bicycle or operating a motorcycle or any other motor
vehicle. Sudden and unintended operation of the auto light switch can create a
distraction, which can result in a traffic accident and serious personal injury.
To turn the auto light switch on and off
In the Timekeeping Mode, hold down B for about three seconds to toggle the auto
light switch on (auto light switch on indicator displayed) and off (auto light switch on
indicator not displayed).
The auto light switch on indicator is on the display in all modes while the auto light
switch is turned on.

Power Supply

This watch is equipped with a solar cell and a special rechargeable battery (secondary
battery) that is charged by the electrical power produced by the solar cell. The
illustration shown below shows how you should position the watch for charging.
Solar cell
Storing the watch for long periods in an area where there is no light or wearing it in
such a way that it is blocked from exposure to light can cause rechargeable battery
power to run down. Be sure that the watch is exposed to bright light whenever
This watch uses a special rechargeable battery to store power produced by the
solar cell, so regular battery replacement is not required. However, after very long
use, the rechargeable battery may lose its ability to achieve a full charge. If you
experience problems getting the special rechargeable battery to charge fully,
contact your dealer or CASIO distributor about having it replaced.
Never try to remove or replace the watch's special battery yourself. Use of the
wrong type of battery can damage the watch.
The current time and all other settings return to their initial factory defaults
whenever battery power drops to Level 5 (C: Charge) and when you have the
battery replaced.
Turn on the watch's Power Saving function and keep it in an area normally exposed
to bright light when storing it for long periods. This helps to keep the rechargeable
battery from going dead.
More than 40°
Orient the watch so its face is
pointing at a light source.
The illustration shows how to
position a watch with a resin band.
Note that charging efficiency
drops when any part of the solar
cell is blocked by clothing, etc.
You should try to keep the watch
outside of your sleeve as much
as possible. Charging is reduced
significantly if the face is even only
partially covered.