CASIO QW1848 (SM596)
Service Manual

2. OPERATION CHART : QW-1848
GENERAL GUIDE
Press to change from mode to mode. After you perform an operation in any mode, pressing Press in any mode to illuminate the display. Timekeeping Mode returns to the Timekeeping Mode. Alarm Mode Countdown Alarm Mode Stopwatch Mode

TIMEKEEPING MODE
Day of week Month Day

To set the alarm time

To set the time and date
1. Press while in the Timekeeping Mode. The seconds digits flash on the display because they are selected. 2. Press to change the selection in the following sequence. Seconds Day Hour Month Minutes Year

1. Press while in the Alarm Mode. The hour digits flash on the display because they are selected. This operation automatically turns on the alarm. 2. Press to change the selection in the following sequence. Hour Minutes Month Day

Hour

Seconds

Minutes PM indicator

3. While the seconds digits are selected (flashing), press to reset the seconds to . If you press while the seconds count is in the range of 30 to 59, the seconds are reset to 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 any other digits (besides seconds) are selected (flashing), press to increase the number. Holding down changes the number at high speed. While any digits are selected, press to switch between the 12-hour and 24-hour formats. When the 12-hour format is selected, the P (PM) indicator appears on the display to indicate �p.m.� times. There is no indicator for �a.m.� times. Selecting the 24-hour format causes the 24 indicator to appear on the display. 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.

3. Press to increase the selected digits. Holding down changes the number at high speed. To set an alarm that does not include a month (Daily alarm, Monthly alarm), set for the month. Press until the mark appears (between 12 and 1) while the month digits are flashing. To set an alarm that does not include a day (Daily alarm, 1-Month alarm), set for the day. Press until the mark appears (between 31 and 1) while the day digits are flashing. The format (12-hour and 24-hour) of the alarm time matches the format you select for normal timekeeping. When setting the alarm time using the 12-hour format, take care to set the time correctly as morning (no indicator) or afternoon (P). 4. After you set the alarm time, press to return to the Alarm 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 Alarm Mode automatically.

To stop the alarm
Press any button to stop the alarm after it starts to sound.

To turn the alarm and Hourly Time Signal on and off
Press while in the Alarm Mode to change the status of the alarm and Hourly Time Signal in the following sequence. [Alarm On Indicator/Hourly Time Signal On Indicator]

BACKLIGHT FUNCTION
A backlight that uses an EL (electro-luminescent) panel causes the entire display to glow for easy reading in the dark. An EL alarm feature can be turned on so the backlight flashes whenever an alarm or hourly time signal sounds. The EL alarm on indicator ( ) is shown on the display in all modes while the EL alarm is on.
EL alarm on indicator

Both ON

Both OFF

Alarm Only

Hourly Time Signal Only

COUNTDOWN ALARM MODE
Mode indicator

Note 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 countdown timer can be set within a range of 1 second to 24 hours. When the countdown reaches zero, an alarm Current time sounds for 10 seconds or until you press any button. Note that you can also select auto repeat timing that automatically restarts the countdown from the original value you set whenever zero is reached. 1. Press while in the Countdown Alarm Mode. The hours digit flashes on the display because it is selected. 2. Press to change the selection in the following sequence. Hours Minutes Seconds

To manually turn on the backlight
Pressing in any mode causes the backlight to turn on for about three seconds. The backlight automatically turns off whenever an alarm sounds. The above operations turn on the backlight, regardless of the current EL alarm settings.
Hours Seconds

To set the countdown time

To turn the EL alarm on and off
In the Timekeeping Mode, hold down for about two seconds to toggle the EL alarm on ( indicator displayed) and off ( indicator not displayed). When the EL alarm is on, the backlight flashes while the alarm and hourly time signal tones are sounding.

Minutes

3. Press to increase the selected number. Holding down changes the selection at high speed. To set the starting value of the countdown time to 24 hours, set to . 4. After you set the countdown time, press to return to the Countdown Alarm 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 Countdown Alarm Mode automatically.

ALARM MODE
Hourly time signal on indicator Mode indicator Month Day

You can set an alarm with hour, minutes, month, and day. When the alarm is turned on, the alarm sounds for 20 seconds at the preset time. When the Hourly Time Signal is turned on, the watch beeps every hour on the hour.

Alarm Types
The types of alarm you get depends on the information you set. To set a Daily alarm Set the hour and minutes for the alarm time. Set for the month and for the day (see step 3 under �To set the alarm time�). This type of setting causes the alarm to sound everyday at the time you set. To set a Date alarm Set the month, day, hour and minutes for the alarm time. This type of setting causes the alarm to sound at the specific time, on the specific date you set.

1.Press while in the Countdown Alarm Mode to start the countdown timer. 2. Press again to stop the countdown timer. You can continue countdown timer operation by pressing . 3. Stop the timer and then press to reset the countdown time to its starting value. When the end of the countdown is reached and auto repeat timing is off, the alarm sounds for 10 seconds or until you stop the alarm by pressing any button. Countdown timing stops, and the countdown time is automatically reset to its starting value after the alarm stops.

To use the countdown timer

To turn auto repeat timing on and off
1. Press while in the Countdown Alarm Mode. The hours digit flashes on the display because it is selected. 2. Press to turn auto repeat on (AUTO displayed) and off (AUTO not displayed). 3. Press to return to the Countdown Alarm Mode. When the end of the countdown is reached while auto repeat is on, the alarm sounds, but the countdown starts again automatically whenever the countdown reaches Auto repeat on indicator zero. You can stop timing by pressing , and manually reset to the starting countdown time by pressing .

Minutes Hour Alarm on indicator

To set a 1-Month alarm Set the month, hour and minutes for the alarm time. Set for the day (see step 3 under �To set the alarm time�). This type of setting causes the alarm to sound every day at the time you set, only during the month you set. To set a Monthly alarm Set the day, hour and minutes for the alarm time. Set for the month (see step 3 under �To set the alarm time�). This type of setting causes the alarm to sound every month at the time you set, on the day you set.

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