CASIO QW1805 (SM579)
Service Manual

2. OPERATION CHART : QW-1805
GENERAL GUIDE
If the digital display of your watch is continually changing, see �AUTO DISPLAY FUNCTION� for information on how to stop it. Press to change from mode to mode. Press in any mode to illuminate the display for about three seconds. The animation area shows different animated characters and graphics, depending on the mode and the operation being performed. Timekeeping Mode
Animation area

World Time Mode

Alarm Mode

Stopwatch Mode

(Mode) (Light)

TIMEKEEPING MODE
Use the Timekeeping Mode to set the current time and date. You can view the current time in the zone (city) you select in the World Time Mode.
Animation area

About the backlight
In any mode, press to illuminate the display for about three seconds. In the Timekeeping Mode, animated figures appear in the animation area whenever the backlight is turned on. The backlight of the watch employs an electro-luminescent (EL) light, which loses illuminating power after very long use. The illumination provided by the backlight may be hard to see when viewed under direct sunlight. The watch will emit an audible sound whenever the display is illuminated. This is caused by a transistor that vibrates when the EL panel lights up. It does not indicate malfunction of the watch. The backlight automatically turns off whenever an alarm sounds.

Date Screen

Day of week Month - Day
Press

World Time Screen
World time indicator

PM indicator Hour : Minutes

Seconds
Time in the zone (city) you select in the World Time Mode.

About animated figures
The following are the animated figures that appear in each mode. Rotating Globe This figure appears after you have been in the Timekeeping Mode or World Time Mode. Occasionally an airplane or a flying saucer appears. Dances of the World Dancing figures appear whenever you press or in the Timekeeping Mode. There are two dances for each day of the week. However, the dance for another day of the week may appear. Ostrich The ostrich appears whenever you are in the Stopwatch Mode, and runs while a stopwatch timing operation is being performed. Alarm Clock This figure appears whenever an alarm time is reached in any mode except the Stopwatch Mode.

Pressing or while in the Timekeeping Mode causes an animated figure to appear in the animation area of the display. A different figure appears for each day of the week. See �About animated figures� for details.

To set the time and date
Time system indicator

1. Hold down while in the Timekeeping Mode until the seconds digits start to flash on the display. The seconds flash because they are selected. At this time, the time system indicator and DST on/off indicator appear. 2. Press to change the selection in the following sequence. See �To switch between Standard Time and Daylight Saving Time� for details on DST On/Off setting.

DST on/off indicator

WORLD TIME MODE
Seconds Day

DST On/Off Month

Time system Year

Hour Minutes

Mode indicator City code

3. While the seconds digits are selected (flashing), press or to reset the seconds to 00 . If you press or while the seconds count is in the range of 30 to 59, the seconds are reset to 00 and 1 is added to the minutes. If the seconds count is in the range of 00 to 29, the minutes count is unchanged. 4. While hour, minutes, year, month, or day is selected (flashing), press to increase the number or to decrease it. While the time system indicator is selected (flashing), press or to switch between the 12-hour ( ) and 24-hour ( ) formats. Holding down either button changes the current selection at high speed. With the 12-hour format, the P (PM) indicator appears to the left of the hour digits for times in the range of noon to 11:59 pm and the A (AM) indicator appears to the left of the hour digits for times in the range of midnight to 11:59 am. With the 24-hour format, times are indicated in the range of 00:00 to 23:59, without any indicator. 5. After you set the time and date, press to return to the Timekeeping Mode. The day of the week is automatically set in accordance with the date. The date can be set within the range of January 1, 1995 to December 31, 2039. If you do not operate any button for a few minutes while a selection is flashing, the flashing stops and the watch goes back to the Timekeeping Mode automatically.

Current time Current time in the selected city

The World Time Mode shows the current time in 40 cities (27 time zones) around the world. The time settings of the Timekeeping Mode and the World Time Mode are independent, so you must make separate settings for each. Note, however, that the seconds counts for both modes are synchronized with each other. Whenever you change the time setting for any city in the World Time Mode, the settings of all other cities are changed accordingly. The 12-hour/24-hour format of the World Time matches the format you select in the Timekeeping Mode. The time zone that is displayed when you leave the World Time Mode will still be displayed when you enter the World Time Mode again.

To view the time in another zone
While in the World Time Mode, press to scroll forward through the city codes (time zones) and to scroll back. For full information on city codes, see the �CITY CODE TABLE� at the back of this manual. Holding down either button scrolls through the city codes at high speed.

To switch between Standard Time and Daylight Saving Time
Daylight saving time (DST), which is also sometimes called �summer time,� advances the time for one hour, as is the custom in some areas during the summer. Remember that not all countries or even local areas use Daylight Saving Time.
DST indicator 1. Hold down

To set the World Time
DST indicator

1. In the World Time Mode, press or to scroll through the time zones and find the one you want. 2. Hold down until the DST On/Off setting starts to flash on the display. The setting flashes because it is select-

while in the Timekeeping Mode until the seconds digits start to flash on the display. The seconds flash because they are selected. 2. Use to move the flashing to the DST on/off indicator. 3. Press or to toggle Daylight Saving Time on ( ON ) and off ( Aff ). 4. After you make the setting you want, press to return to the Timekeeping Mode. The DST indicator appears on the display to indicate that daylight saving time is turned on.

ed. The DST indicator flashes along with the current on/off setting.

3. Press

to change the selection in the following sequence.
DST On/Off Hour Minutes

DST on/off indicator

4. While DST On/Off setting is selected (flashing), press or toggle Daylight Saving Time on ( ON ) and off ( Aff ). While the hour or minutes digits are selected, press to increase the setting and to decrease it. Holding down either button while the hour or minutes digits are selected changes the setting at high speed. 5. After you set the time, press to return to the World Time Mode. If you do not operate any button for a few minutes while a selection is flashing, the flashing stops and the watch goes back to the World Time Mode automatically.

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