Casio QW-2228 Service Manual & Parts List
(WITHOUT PRICE)
SERVICE MANUAL
& PARTS LIST
REF. NO. S/M-718
NOVEMBER 2000
QW-2228
MODULE NO.
R
BG-540PP
- 1 -
CONTENTS
1. SPECIFICATIONS : QW-2228
1. SPECIFICATIONS • • • • • • • • • • • • • • • • • • • • • • • • • • 1
2. OPERATION CHART • • • • • • • • • • • • • • • • • • • • • • • • 2
3. DRAWINGS • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 3
3-1. BLOCK DIAGRAM • • • • • • • • • • • • • • • • • • • • • • • • 3
3-2. CHECKING TERMINALS AND COMPONENTS• • • • 4
4. EXPLODED VIEW • • • • • • • • • • • • • • • • • • • • • • • • • • 5
5. PARTS LIST • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 6
6. PRECAUTIONS FOR REPAIR • • • • • • • • • • • • • • • • • • 7
6-1. AC (ALL CLEAR) AND REMOVING OF MODULE • • 7
6-2. ACCURACY CHECKING • • • • • • • • • • • • • • • • • • • 7
Item Detail Item Detail
Battery CR1616 Accuracy ±15sec./month
Battery life Approx. 24 months Accuracy setting system Trimmer capacitor
Current consumption 1.28 µA maximum Accuracy checking See page 7
Alarm system Piezo plate on Back cover Accuracy setting +0.25~+0.35sec./day
Function
• Shock resistant
• Electro-luminescent backlight
Afterglow
• 1/100-second stopwatch
Measuring capacity: 59'59.99"
Measuring modes: Elapsed time, split time, 1st-2nd place times
• Daily alarm
• Hourly time signal
• Auto-calendar (to year 2039)
• 12/24-hour formats
• Regular timekeeping: Hour, minutes, seconds, am/pm, month, date, day, daylight saving on/off
- 2 -
2. OPERATION CHART : QW-2228
GENERAL GUIDE
Press to change from mode to mode.
Timekeeping Mode
Alarm Mode Stopwatch Mode
Press .
TIMEKEEPING MODE
Hour : Minutes
Seconds
DST on indicator
Month - Day
Day of week
PM indicator
In the Timekeeping Mode, press to switch between the 12-hour and 24-hour
format.
When the 12-hour format is selected, “p.m.” times are indicated on the display by P,
while “a.m.” time are indicated by A. No indicators are used with the 24-hour format.
In the Timekeeping Mode, press to switch between the month-day/day of the
week display and day of the week/day/G mark display.
Setting the Time and Date
There are two different ways to set the time and date. The procedure you should use
depends on whether you want to make major changes or minor changes to the cur-
rent setting.
ABOUT THE BACKLIGHT
In any mode, press to illuminate the display for about 4 seconds. If you turn on
the backlight in the Timekeeping Mode, the figures on the display disappear for
about the final two seconds the backlight is on.
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 backlight shortens the battery life.
The watch emits an audible sound whenever the display is illuminated. This does
not indicate malfunction of the watch.
The illumination provided by the backlight may be hard to see when viewed under
direct sunlight.
The backlight automatically turns off whenever an alarm sounds.
About the animation display
Turning on the backlight in any mode (except when a setting screen is on the display) causes one of 72 different animated figures to appear on the display. The
figure that appears depends on when you press the backlight button.
ALARM MODE
When the Daily Alarm is turned on, an alarm sounds for
20 seconds at the preset time each day. When the Hourly
Time Signal is turned on, the watch beeps every hour on
the hour.
If you do not operate any button for a few minutes while
in the Alarm Mode, the watch goes back to the Time-
keeping Mode automatically.
To set the alarm time
1.Hold down until the hour digits start to flash on the
display. The hour digits flash because they are
selected
.
At this time the Alarm is automatically turned on.
2. Press to change the selection in the following sequence.
Hour Minutes
To make major time and date settings
1.Hold down until the seconds digits start to flash.
2.Press to move the selection around the display in the following sequence.
DST on/off
Seconds
Day
Hour
Year
Month
Minutes
3. While the seconds digits are selected (flashing), press to reset them to 00. If
you press while the seconds count is in the range of 30 to 59, they 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 the DST
setting is selected (DST on indicator is flashing), press to toggle
it on (on) and off (OF).
5. While any other digits (besides seconds), are selected (flashing), press to increase the number. Holding down changes the digits at high speed.
The date can be set with the range of January 1, 2000 to December 31, 2039.
6.After you set the time and date, press to return to the Timekeeping 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 Timekeeping Mode automatically.
The day of the week is automatically set in accordance with the date.
The watch’s built-in full automatic calendar automatically makes allowances for
different month lengths and leap years. Once you set the date, there should be no
reason to change it except after the replacement of the watch’s battery.
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.
To zero-reset the minutes and seconds (EASY ADJUST)
1.Hold down and at the same time on which you want to zero-reset the minutes and seconds arrives.
The watch beeps to let you know that the minutes and seconds were reset to 00 00.
If you press and while the minutes count is in the range of 30 to 59, they are
reset to 00 and 1 is added to the hour. If the minutes count is in the range of 00 to
29, the hour count is unchanged.
2.Release buttons and .
Though the beep may sound slightly after the point you press both buttons, the
zero-reset setting should be correct.
When you want to do this:
Make major changes to the time and
date setting (before using the watch
for the first time, after having the bat-
tery replaced, etc.)
Make minor adjustments (within about
30 minutes of the current setting) to
the time setting
Use this procedure:
“To make major time and date settings”
“
To zero-reset the minutes and seconds
(EASY ADJUST
)”
Mode indicator
Hour : Minutes
Alarm on indicator
Hourly time signal
on indicator
Current time
Mode indicator
1/100
second
Minutes
Seconds
Current time
3. Press to increase the number. Holding down changes the digits at high
speed.
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 or afternoon.
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 Daily Alarm and Hourly Time Signal on and off
Press while in the Alarm Mode to change the status of the Daily Alarm and Hourly
Time Signal in the following sequence.
Hourly Time
Signal only
Daily Alarm
only
Both OFFBoth ON
To test the alarm
Hold down while in the Alarm Mode to sound the alarm.
STOPWATCH MODE
The Stopwatch Mode lets you measure elapsed time, split
times, and two finishes. The range of the stopwatch is 59
minutes, 59.99 seconds.
If you do not operate any button for a few minutes while
the all-zero screen is on the display in the Stopwatch
Mode, the watch goes back to the Timekeeping Mode
automatically.
Press .
(a) Elapsed time measurement
Start
Stop Re-start Stop Clear
Start
Split Split release Stop Clear
Start
Split Stop Split release Clear
(b) Split time measurement
(c) Split time and 1st-2nd place times
First runner
finishes.
Second runner
finishes.
Record time of
first runner.
Record time of
second runner.
C
C
C
C
D D
D
D
D
D
D
D
D
D
L
B
B
D
B
D
B
B
B
A
A
A
A
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