Casio 5351 Troubleshooting, Specifications

Operation Guide 5351

Troubleshooting

Hand Movement and Position

■I lost track of what mode the watch is in.

Refer to “Mode Reference Guide” (page E-33). 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-17).

■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-20).

E-70

•The time setting is being adjusted following a successful auto time calibration signal receive operation (page E-21).

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

The watch may be in the power recovery mode (page E-18). 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-37).

■The current time setting is off by one hour.

•If you are using the watch in an area where time calibration signal reception is possible, see “To configure Home City settings” (page E-37).

E-71

•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” (page E-40) 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-65).

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-17). 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 sufficiently 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-72 E-73

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

Possible Cause	Remedy	Page
• 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-26
operation.	calibration signal receive operation is
• 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-23
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.
	• 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.
	• Try again later.
E-74

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

You may have the watch configured for Auto Receive of the time calibration signal (page E-28), 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-37).

■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-40
watch may be different from the period
	to STD (for standard time) or DST (for
set for your currently selected Home City.
	summer time).
		E-75

■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-28
Mode.	enter the Timekeeping Mode.	E-34
Your Home City setting is wrong.	Check your Home City setting and	E-21
	correct it, if necessary.	E-37
Auto time calibration signal reception	Check the auto time calibration signal	E-31
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-60
progress.
	Timekeeping Mode.
There is not enough power for signal	Expose the watch to light to charge it.	E-13
reception.

■Signal reception is being performed successfully, but the time and/or day is wrong.

Possible Cause	Remedy	Page
Your Home City setting is wrong.	Check your Home City setting and	E-21
	correct it, if necessary.	E-37
The watch may have been exposed to
magnetism or strong impact, which has	Adjust the watch’s hand and day	E-65
caused problems with proper hand and	indicator home positions.
day indicator alignment.

E-76 E-77

World Time

■The indicated World Time is wrong.

There is a problem with your Home City settings.

Check your Home City settings.

See “To confi gure Home City settings” (page E-37).

■The indicated World Time is one hour off.

The daylight saving time (summer time) setting for the World Time city is wrong. See “To view the time in another time zone” (page E-50).

Alarm

■The alarm does not sound.

•Power may be low. Expose the watch to light until the x Second Hand starts moving normally, at one-second intervals (page E-17).

•The time setting is wrong in terms of a.m. and p.m.

•The crown may be pulled out. Push the crown back in.

E-78

Specifications

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

Timekeeping: Hour, minutes (hand moves every 10 seconds), seconds, day, day of the week

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

Other: Home City code (can be assigned one of 29 city codes and Coordinated Universal Time); Daylight Saving Time (summer time) auto switching / Standard time

Time Calibration Signal Reception: Auto receive up to six times a day (5 times a day for the Chinese calibration signal; Remaining auto receives cancelled as soon as one is successful); Manual receive

Receivable Time Calibration Signals:

Mainflingen, Germany (Call Sign: DCF77, Frequency: 77.5 kHz);

Anthorn, England (Call Sign: MSF, Frequency: 60.0 kHz); Fukushima,

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

(Call Sign: JJY, Frequency: 60.0 kHz); Fort Collins, Colorado, the

United States (Call Sign: WWVB, Frequency: 60.0 kHz); Shangqiu City,

Henan Province, China (Call Sign: BPC, Frequency: 68.5 kHz) E-79