Casio 5240 Troubleshooting, STD, DST, The, LON, PAR, ATH, HNL, ANC, LAX, DEN, CHI, NYC, HKG, TYO, The, STD, DST, AUTO, Page, Page, AUTO, Page, PARIS, TOKYO, Sensor

Operation Guide 5240

To adjust home positions

1.Pull out the crown.

2.Hold down Bfor at least fi ve seconds until the watch

	beeps and the x Second Hand moves to 12 o’clock.
	ξ Automatic home position adjustment of all of the
	hands (but not the n Day Indicator) will start.
	ξ If all hands are at 12 o’clock (the proper home hand

	home position), advance directly to step 3.
	ξ If the v Upper Dial Hand is not pointing at 24, which
	is its home position, hold down Afor about two
	seconds to move it there.

3. Press C.

ξ This enters the n Day Indicator home position adjustment mode.

4. Check the n Day Indicator to confi rm that it is 1, which



is its home position.

ξ If the 1 is not in the center of the n Day Indicator, rotate the crown to center it.

ξ Rotating the crown three full consecutive turns clockwise will cause the n Day Indicator to start changing in a forward direction (increment).

ξTo stop n Day Indicator movement, press any button.

5. Push the crown back in to return to the Timekeeping Mode.

ξ This will cause the hands to return to their normal positions and resume regular timekeeping. Wait until everything stops moving before performing any other operation.

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Troubleshooting

Hand Movement and Position■I lost track of what mode the watch is in.

Refer to “Mode Reference Guide” (page E-30). To return directly to the Timekeeping Mode, hold down Cat least two seconds.

■The x Second Hand is moving at two-second intervals.

■All the watch’s hands are stopped at 12 o’clock and none of the buttons work (x Second Hand stopped at 57, 58, 59, or 00).

Power may be low. Expose the watch to light until the x Second Hand starts moving normally, at one-second intervals (page E-14).

■The hands of the watch suddenly start moving at high speed, even when I do not perform any operation.

This could be due to any one of the following causes. In all cases, the hand movement does not indicate malfunction, and should stop shortly.

ξThe watch is recovering from a sleep state (page E-17).

ξThe time setting is being adjusted following a successful auto time calibration signal receive operation (page E-18).

■Hands suddenly stop moving. Button operation also is disabled.

The watch may be in the power recovery mode (page E-15). Do not perform any operation until the hands return to their normal positions (in about 15 minutes). The hands should return to their correct positions when normal operation returns. To help power recover, leave the watch in a location where it is exposed to light.

■The current time setting is off by hours.

ξYour Home City setting may be wrong. Check your Home City setting and correct it, if necessary (page E-34).

■The current time setting is off by one hour.

ξIf you are using the watch in an area where time calibration signal reception is possible, see “To configure Home City settings” (page E-34).

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ξThe period when summer time is applied in the location where you are using the watch may be different from the period set for your currently selected Home City. Use the procedure under “To switch between standard time and summer time manually” (page E-37) to switch from AT (AUTO) to STD (for standard time) or DST (for summer time).

■The time and date settings are off.

This could indicate that the watch has been exposed to magnetism or strong impact, which has caused problems with proper hand and day indicator alignment. Adjust the watch’s hand and day indicator home position alignment (page E-68).

Sensor■Temperature measurement error occurs.

This indicates that there is a problem with the sensor or the watch’s internal circuitry, making sensor measurement and value correction impossible.

ξ If the error message appears during a measurement, restart the measurement. If the error message appears when you restart the measurement, it probably means that there is a problem with the sensor or internal circuitry.

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

This can happen after the power level drops to Level 3 (page E-14). Continue exposing the watch to light until the x Second Hand starts moving normally (at one- second intervals).

■The x Second Hand starts to move at one-second intervals, but then suddenly returns to moving at two-second intervals.

The watch probably is not suffi ciently charged yet. Continue keeping it exposed to light.

Time Calibration Signal

The information in this section applies only when LONDON (LON), PARIS (PAR), ATHENS (ATH), HONOLULU (HNL), ANCHORAGE (ANC), LOS ANGELES (LAX), DENVER (DEN), CHICAGO (CHI), NEW YORK (NYC), HONG KONG (HKG), or TOKYO (TYO) is selected as the Home City. You need to adjust the current time manually when any other city is selected as the Home City.

■The x Second Hand indicates N (NO) when I check the result of the latest receive operation.

Possible Cause	Remedy	Page
ξ You are wearing or moving the watch,
or performing a button operation	Keep the watch in an area where
during time calibration signal receive	reception conditions are good while time	E-23
operation.	calibration signal receive operation is
ξ The watch is in an area with poor	being performed.
reception conditions.
You are in an area where signal reception	See “Approximate Reception Ranges”.	E-20
is not possible for some reason.
The alarm time was reached during time	The alarm sounded during time
	calibration signal reception, causing	—
calibration signal reception.
	reception to be canceled.
	ξ Check the website of the organization
The calibration signal is not being	that maintains the time calibration
	signal in your area for information about	—
transmitted for some reason.
	its down times.
	ξ Try again later.

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■The current time setting changes after I set it manually.

You may have the watch confi gured for Auto Receive of the time calibration signal (page E-25), which will cause the time to be adjusted automatically according to your currently selected Home City. If this results in the wrong time setting, check your Home City setting and correct it, if necessary (page E-34).

■The current time setting is off by one hour.

Possible Cause	Remedy	Page
The period when summer time is applied	Use the procedure under “To switch
	between standard time and summer time
in the location where you are using the
	manually” to switch from AT (AUTO)	E-37
watch may be different from the period
	to STD (for standard time) or DST (for
set for your currently selected Home City.
	summer time).

■Auto Receive is not performed or I cannot perform Manual Receive.

Possible Cause	Remedy	Page
The watch is not in the Timekeeping	Hold down Cat least two seconds to	E-25
Mode.	enter the Timekeeping Mode.	E-31
Your Home City setting is wrong.	Check your Home City setting and	E-18
	correct it, if necessary.	E-34
Auto time calibration signal reception	Check the auto time calibration signal	E-27
is OFF.	reception setting.
A countdown timer operation is in	In the Countdown Timer Mode, stop the
	timer operation and then return to the	E-63
progress.
	Timekeeping Mode.
There is not enough power for signal	Expose the watch to light to charge it.	E-12
reception.

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