CASIO QW1825 (SM586)
Service Manual

2-2. QW-1825

GENERAL GUIDE

� Press C to change from mode to mode. � In any mode (except when making countdown alarm settings) press D to illuminate the digital display. Caution � The backlight of this watch employs an electro-luminescent (EL) light, which loses its illuminating power after very long term use. � Frequent use of the backligfht shortens the battery life. � The watch emits an audible sound whenever the display is illuminated. This is because the EL light vibrates slightly when lit. It does not indicate malfunction of the watch. Timekeeping Mode
Stopwatch Mode Countdown Alarm Mode Alarm Mode

A C

SUN

6 30

B E

ST

6 00

TR

60

AL

6

10 58 50
D

0 0000

0 0000

6 45

TIMEKEEPNG MODE
Day of week Month Day

COUNTDOWN ALARM MODE
Mode indicator
TR 0

To set the time and date
1.Hold down A while in the Timekeeping Mode until the seconds digits flash on the display. 2.Press C to change the selection (flashing) in the following sequence.
Seconds Hour Minutes Month
12/24-Hour Format

1/10 seconds

The countdown alarm can be set within a range of 1 second to 24 hours. When the countdown reaches zero, an alarm sounds for 10 seconds or until you press any button.

A C

B E

A C

SUN

6 30

B E

To set the countdown start time
1. Hold down A while in the Countdown Alarm Mode. The hour setting flashes on the display because it is selected. 2. Press C to change the selection in the following sequence.
Hour Minutes Seconds

0 0000
D
Hours

10 58 50
D
Hour

Day

Year

Seconds Minutes

Seconds

PM indicator

Minutes

3. While the seconds setting is selected (flashing), press E to reset it to 00. If you press E while the seconds setting is in the range of 30 to 59, the seconds are reset to 00 and 1 is added to the minutes. If the seconds setting is in the range of 00 to 29, the minutes count is unchanged. 4. While any other setting (beside seconds) is selected (flashing), press E to increase it or B to decrease it. While the 12/24-hour format setting is selected, press E to toggle it between 12 and 24. � Except for the seconds or 12/24-hour setting, holding down a button changes the setting at high speed. � When the 12-hour format is selected, the indicator P appears on the display to indicate �P.M.� times. There is no indicator for �A.M.� times. 5. After you set the time and date, press A 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 setting is flashing, the flashing stops and the watch goes back to the Timekeeping Mode automatically.

3. Press E to increase the selected setting or B to decrease it. Holding down either button changes the setting at high speed. � To set the starting value of the countdown time to 24 hours, set 0:00'00". 4. After you set the countdown start time, press A to return to the Countdown Alarm Mode. � If you do not operate any button for a few minutes while a setting is flashing, the flashing stops and the watch goes back to the Countdown Alarm Mode automatically.

To use the countdown alarm
1. Press E while in the Countdown Alarm Mode to start the countdown alarm. 2. Press E again to stop the countdown alarm. � You can resume a paused countdown alarm operation by pressing E. 3. Stop the countdown alarm and then press B 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.

ABOUT THE EL ALARM
While the EL alarm feature is turned on, the watch's EL backlight flashes along with the audible tone when a daily alarm time is reached, when the hourly time signal sounds, or when the end of a countdown alarm operation is reached. Pressing D while the EL alarm feature is turned on causes the display to remain illuminated for five seconds, instead of the normal two seconds when the EL alarm is turned off.

To turn auto repeat timing on and off
1. Hold down A while in the Countdown Alarm Mode until the hour setting flashes. 2. Press D to turn auto repeat on and off.
Auto repeat indicator

A C

TR

B
Press D

A C

TR

B E

To turn the EL Alarm feature on and off
� In the Timekeeping Mode, hold down B until the EL Alarm indicator appears on (EL alarm on) or disappears from (EL alarm off) the display.
EL Alarm indicator
SUN 6 30

0 1500
D
OFF

E

0 1500
D
ON

B
Hold down B

SUN

6 30

B
3. Press A 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 restarts from the beginning without stopping. You can stop the countdown by pressing E and manually reset to the start time by pressing B. � When the starting value of the countdown time is set at 10 seconds or less and auto repeat is turned on, the countdown alarm tone sounds for only one second instead of the normal 10 seconds. If the EL Alarm is turned on, the EL backlight does not flash under the above conditions.

10 5850
ON D

10 5850
OFF D

STOPWATCH MODE
Mode indicator 1/100 seconds

The stopwatch Mode lets you measure elapsed time, split times, and two finishes. The range of the stopwatch is 23 hours, 59 minutes, 59.99 seconds. You can use the EL backlight at any time while the stopwatch is operating.

ST

6 00

B E

ALARM MODE
When the Daily Alarm is turned on, the alarm sounds for 20 seconds at the preset time each day. Press any button to stop the alarm after it starts to sound. When the Hourly Time Signal is on, the watch beeps every hour on the hour.
Mode indicator

0 0000
Hours Seconds

Minutes

A
Elapsed time measurement E E Start Stop E Re-start B Split release E Stop Second runner finishes. Record time of first runner. E Stop E Stop B Split release Record time of second runner. B Clear B Clear
Alarm on indicator

AL

B E

Hourly time signal on indicator

C

6 45
D
Hours Minutes

Split time measurement E B Start Split Split time and 1st-2nd place times E Start B Split First runner finishes.

B Clear

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