Casio 5251 Troubleshooting, Speciﬁcations, HKG, TYO, The, Page, Page, Page, TOKYO, Remedy, Remedy, Remedy, Other:, Charging, HONG KONG, Timekeeping:, Power Supply:

Operation Guide 5251 (OC)

Troubleshooting

Hand Movement and Position■The x Second Hand is moving in the pattern: 1 second 1 second 2 seconds.

The battery charge is starting to go low. Expose the watch to light to charge it. See “Charging the Watch” (page E-10).

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

■All of the watch’s hands are stopped at 12 o’clock, and the Abutton and crown do not do anything.

The battery charge may be low. Expose the watch to light until the x Second Hand starts moving normally, at one-second intervals (page E-11).

■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-15).

ξThe time setting is being adjusted following a successful auto time calibration signal receive operation (page E-16).

■Nothing happens when I rotate the crown.

Leaving the crown pulled out for more than two minutes without performing any operation will automatically cause the setting operation to become disabled. If this happens, press the crown back in and then pull it out again to conﬁ gure settings. See “Crown Operations” (page E-4).

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■Hand movement is stopped.

The watch may have been exposed to magnetism, which will cause the hands to stop at their current positions. Pull the crown out to the ﬁ rst click or press a button to restart hand movement. If the indicated time is not correct, perform home position adjustment. See “Adjusting Home Positions Manually” (page E-29).

■The current time setting is off by hours.

Your location setting may be wrong. Check your location setting and correct it, if necessary (page E-22).

■The hands and/or day indications 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 alignment. Adjust the watch’s hand and day home position alignment (page E-29).

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

This can happen after the battery charge level drops to Level 4 (page E-11). Continue exposing the watch to light until the x Second Hand starts moving normally (at one-second intervals).

Time Calibration Signal

The information in this section applies only when CN (HKG, HONG KONG), or JP (TYO, TOKYO) is selected as the current location.

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■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 during the signal	Keep the watch in an area where reception
receive operation.	conditions are good while the signal receive	E-18
ξ The watch is in an area with poor reception	operation is being performed.
conditions.
You are in an area where signal reception is not	See “Approximate Reception Ranges”.	E-17
possible for some reason.	See “Approximate Reception Ranges”.	E-17
possible for some reason.
	ξ Check the website of the organization that
The calibration signal is not being transmitted for	maintains the time calibration signal in your area	—
some reason.	for information about its down times.	—
some reason.	for information about its down times.
	ξ Try again later.

■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-19), which will cause the time to be adjusted automatically according to your currently selected location. If this results in the wrong time setting, check your location setting and correct it, if necessary (page E-22).

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

Possible Cause	Remedy	Page
Your location setting is wrong.	Check your location setting and correct it, if	E-22
Your location setting is wrong.	necessary.	E-22
	necessary.
There is not enough power for signal reception.	Expose the watch to light to charge it.	E-10

■Signal reception is being performed successfully, but the time is wrong.

Possible Cause	Remedy	Page
Your location setting is wrong.	Check your location setting and correct it, if	E-22
Your location setting is wrong.	necessary.	E-22
	necessary.
The watch may have been exposed to magnetism
or strong impact, which has caused problems with	Adjust the watch’s hand home positions.	E-29
proper hand alignment.

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Speciﬁcations

Accuracy at normal temperature: ± 15 seconds a month (with no signal calibration)

Timekeeping: Hour, minutes, seconds, day

Calendar system: Full Auto-calendar pre-programmed from the year 2000 to 2099

Time Calibration Signal Reception: Auto receive up to three times a day (Remaining auto receives cancelled as soon as one is successful); Manual receive

Receivable Time Calibration Signals:

Fukushima, Japan (Call Sign: JJY, Frequency: 40.0 kHz); Fukuoka/Saga, Japan (Call

Sign: JJY, Frequency: 60.0 kHz); Shangqiu City, Henan Province, China (Call Sign: BPC,

Frequency: 68.5 kHz)

Other: Power Saving; Auto second hand home position correction

Power Supply: Solar panel and one rechargeable battery

Approximate battery operating time: 5 months (no exposure to light after a full charge; one signal reception of approximately 4 minutes per day)

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