Manual Casio 5240 - GW-A1000 (page 8 of 9) (English)

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Operation Guide 5240

E-79

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

Possible Cause Remedy Page

The watch is not in the Timekeeping

Mode.

Hold down C at least two seconds to

enter the Timekeeping Mode.

E-25

E-31

Your Home City setting is wrong.

Check your Home City setting and

correct it, if necessary.

E-18

E-34

Auto time calibration signal reception

is OFF.

Check the auto time calibration signal

reception setting.

E-27

A countdown timer operation is in

progress.

In the Countdown Timer Mode, stop the

timer operation and then return to the

Timekeeping Mode.

E-63

There is not enough power for signal

reception.

Expose the watch to light to charge it. E-12

E-78

■ 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

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” to switch from AT (AUTO)

to STD (for standard time) or DST (for

summer time).

E-37

E-77

■ The

Second Hand indicates N (NO) when I check the result of the latest

receive operation.

Possible Cause Remedy Page

You are wearing or moving the watch, x

or performing a button operation

during time calibration signal receive

operation.

The watch is in an area with poor x

reception conditions.

Keep the watch in an area where

reception conditions are good while time

calibration signal receive operation is

being performed.

E-23

You are in an area where signal reception

is not possible for some reason.

See “Approximate Reception Ranges”. E-20

The alarm time was reached during time

calibration signal reception.

The alarm sounded during time

calibration signal reception, causing

reception to be canceled.

—

The calibration signal is not being

transmitted for some reason.

Check the website of the organization x

that maintains the time calibration

signal in your area for information about

its down times.

Try again later. x

—

E-76

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

Second Hand starts moving normally (at one-

second intervals).

The ■

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.

E-75

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.

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.

E-74

The period when summer time is applied in the location where you are using the x

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).

E-73

The time setting is being adjusted following a successful auto time calibration x

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.

Your 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.

If you are using the watch in an area where time calibration signal reception is x

possible, see “To conﬁ gure Home City settings” (page E-34).

E-72

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 C at least two seconds.

■ The

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

(

Second Hand stopped at 57, 58, 59, or 00).

Power may be low. Expose the watch to light until the

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.

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

E-71

Press 3. C.

This enters the

Day Indicator home position

adjustment mode.

Check the 4.

Day Indicator to conﬁ rm that it is 1, which

is its home position.

If the

x 1 is not in the center of the

Day Indicator,

rotate the crown to center it.

Rotating the crown three full consecutive turns

clockwise will cause the

Day Indicator to start

changing in a forward direction (increment).

To stop

Day Indicator movement, press any button.

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

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.



E-70

To adjust home positions

Pull out the crown.1.

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

beeps and the

Second Hand moves to 12 o’clock.

Automatic home position adjustment of all of the x

hands (but not the

Day Indicator) will start.

If all hands are at 12 o’clock (the proper home hand x

home position), advance directly to step 3.

If the

Upper Dial Hand is not pointing at 24, which

is its home position, hold down A for about two

seconds to move it there.



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