Casio 3173, 3246, MO1007-EB Illumination, Button Operation Tone, Troubleshooting, About the Auto Light Switch, KEY, KEY, LT1, LT3, LT3, LT1, TYO, ERR, ERR, ERR, ERR, ERR, ERR, ERR, ERR

Operation Guide 3173 3246

Illumination

The display of the watch is illuminated for easy reading in the dark. The watch’s auto light switch turns on illumination automatically when you angle the watch towards your face.

• The auto light switch must be turned on for it to operate.

To turn on illumination manually

Button Operation Tone

The button operation tone sounds any time you press one of the watch’s buttons. You can turn the button operation tone on or off as desired.

•Even if you turn off the button operation tone, the alarm, Hourly Time Signal, and Countdown Timer Mode alarm all operate normally.

To turn the button operation tone on and off

Press L in any mode to illuminate the display.

• You can use the procedure below to select either one second or three seconds as the illumination duration. When you press L, the display will remain illuminated for about one second or three seconds, depending on the current illumination duration setting.

•The above operation turns on illumination regardless of the current auto light switch setting.

•Illumination is disabled while conﬁguring sensor measurement mode settings, and during bearing sensor calibration.

To change the illumination duration

1. In the Timekeeping Mode, hold down E until the currently selected city code starts to ﬂash. This is the

city code setting screen.

• Before the city code starts to ﬂash, the message SET Hold will appear on the display. Keep E

l l l l	l
l	l
l	l

l	l
	l l l l

Module 3173

1.In the Timekeeping Mode, hold down E until the currently selected city code starts to ﬂash. This is the city code setting screen.

•Before the city code starts to ﬂash, the message SET Hold will appear on the display. Keep E depressed until SET Hold disappears and the city code starts to ﬂash.

2.Keep pressing D until MUTE or KEY is displayed in the upper left corner of the display.

•See step 3 under “To change the current time and date settings” for information about how to scroll through setting screens.

3.Press A to toggle the button operation tone on (KEY ) and off (MUTE).

4.After the settings are the way you want, press E twice to exit the setting screen.

	depressed until SET Hold disappears and the city code starts to ﬂash.
2.	Keep pressing D until LT1 or LT3 is displayed in the upper left corner of the display.
	• See step 3 under “To change the current time and date settings” for information about how to
	scroll through setting screens.
3.	Press A to toggle the illumination duration between three seconds (LT3 displayed) and one second
	(LT1 displayed).
4.	After the settings are the way you want, press E twice to exit the setting screen.

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.	More than
Moving the watch to a position that is parallel to the ground and	40°
then tilting it towards you more than 40 degrees causes
illumination to turn on.	Wear the watch on the
	Wear the watch on the
Warning!	outside of your wrist

•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 on 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.

Note

•This watch features a “Full Auto EL 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 During sensor measurement

While a bearing sensor calibration operation is being performed in the Digital Compass Mode While a sunrise or sunset time is being calculated

To turn the auto light switch on and off

In the Timekeeping Mode, hold down L for about three seconds to toggle the auto light switch on (A.EL displayed) and off (A.EL not displayed).

• The auto light switch on indicator (A.EL) is on the display in all modes while the auto light switch is turned on.

• The auto light switch turns off automatically whenever battery power drops to Level 4.

Auto light switch on indicator

Illumination Precautions

•Frequent display illumination can run down the battery quickly and require charging.

The following guidelines give an idea of the charging time required to recover from a single illumination operation.

Approximately ﬁve minutes exposure to bright sunlight coming in through a window Approximately 50 minutes exposure to indoor ﬂuorescent lighting

•The electro-luminescent panel that provides illumination loses power after very long use.

•Illumination may be hard to see when viewed under direct sunlight.

•Illumination turns off automatically whenever an alarm sounds.

•Frequent use of illumination runs down the battery.

Auto light switch precautions

•Wearing the watch on the inside of your wrist, movement of your arm, or vibration of your arm can cause frequent activation of the auto light switch and illumination of the display. To avoid running down the battery, turn off the auto light switch whenever engaging in activities that might cause frequent illumination of the display.

•Note that wearing the watch under your sleeve while the auto light switch is turned on can cause frequent illumination of the display and can run down the battery.

•Illumination may not turn on if the face of the watch is more than 15 degrees above or below parallel. Make sure that the back of your hand is parallel to the ground.

• Illumination turns off after the preset illumination duration, even if you keep the watch pointed towards your face.

• Static electricity or magnetic force can interfere with proper operation of the auto light switch. If illumination does not turn on, try moving the watch back to the starting position (parallel with the ground) and then tilt it back towards your face again. If this does not work, drop your arm all the way down so it hangs at your side, and then bring it back up again.

•You may notice a very faint clicking sound coming from the watch when it is shaken back and forth. This sound is caused by mechanical operation of the auto light switch, and does not indicate a problem with the watch.

Mute indicator	Note
	Note
	• The mute indicator is displayed in all modes when the button
Module 3246	operation tone is turned off.

Troubleshooting

Time Setting■The current time setting is off by one hour.

You may need to change your Home City’s standard time/daylight saving time (DST) setting. Use the procedure under “To change the current time and date settings” to change the standard time/daylight saving time (DST) setting.

Sensor modes■I can’t change the temperature, barometric pressure, and altitude units.

When TYO (Tokyo) is selected as the Home City, the altitude unit is set automatically to meters (m), the barometric pressure unit to hectopascals (hPa), and the temperature unit to Celsius (°C). These settings cannot be changed.

■“ERR” appears on the display while I am using a sensor .

Subjecting the watch to strong impact can cause sensor malfunction or improper contact of internal circuitry. When this happens, ERR (error) will appear on the display and sensor operations will be disabled.

Digital	Barometric	Altitude
Compass	Pressure/Temperature	Measurement
Measurement	Measurement

•If ERR appears while a measurement operation is being performed in a sensor mode, restart the measurement. If ERR appears on the display again, it can mean there is something wrong with the sensor.

•Even if battery power is at Level 1 (H) or Level 2 (M), the Digital Compass Mode, Barometer/ Thermometer Mode, or Altimeter Mode sensor may be disabled if there is not enough voltage available to power it sufﬁciently. In this case, ERR will appear on the display. This does not indicate malfunction, and sensor operation should resume once battery voltage returns to its normal level.

•If ERR keeps appearing during measurement, it could mean there is a problem with the applicable sensor.

■ERR appears on the display after I perform bidirectional calibration or northerly calibration.

If - - - appears and then changes to ERR (error) on the calibration screen, it means that there is something wrong with the sensor.

•If ERR disappears after about one second, try performing the calibration again.

•If ERR keeps appearing, contact your original dealer or nearest authorized CASIO distributor to have the watch checked.

■ERR appears on the display after I perform northerly calibration.

The ERR message indicates there may be some problem with the sensor. The ERR message also may be due to movement of the watch while the calibration procedure is being performed. Try performing calibration again, taking care to ensure that the watch is not moved.

If this does not solve the problem, the problem may be due to some nearby source of terrestrial magnetism. Try performing the calibration procedure again from the beginning.

Whenever you have a sensor malfunction, take the watch to your original dealer or nearest authorized CASIO distributor as soon as possible.

■What causes incorrect direction readings?

•Incorrect bidirectional calibration. Perform bidirectional calibration.

•Nearby source of strong magnetism, such as a household appliance, a large steel bridge, a steel beam, overhead wires, etc., or an attempt to perform direction measurement on a train, boat, etc. Move away from large metal objects and try again. Note that digital compass operation cannot be performed inside a train, boat, etc.

■What causes different direction readings to produce different results at the same location? Magnetism generated by nearby high-tension wires is interfering with detection of terrestrial magnetism. Move away from the high-tension wires and try again.

■Why am I having problems taking direction readings indoors?

A TV, personal computer, speakers, or some other object is interfering with terrestrial magnetism readings. Move away from the object causing the interference or take the direction reading outdoors. Indoor direction readings are particularly difﬁcult inside ferro-concrete structures. Remember that you will not be able to take direction readings inside of trains, airplanes, etc.

■The barometric pressure differential pointer does not appear on the display when I enter the Barometer/Thermometer Mode.

•This could indicate sensor error. Try pressing B again.

•The barometric pressure differential pointer is not displayed when the displayed current barometric value is outside of the allowable measurement range (260 to 1,100 hPa).

World Time Mode■The time for my World Time City is off in the World Time Mode.

This could be due to incorrect switching between standard time and daylight saving time. See “To specify standard time or daylight saving time (DST) for a city” for more information.

Charging■The watch does not resume operation after I expose it to light.

This can happen after the power level drops to Level 5. Continue exposing the watch to light until the battery power indicator shows “H” or “M”.