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To measure lap and split times

1. Press 

L

 to start the stopwatch.

2. Press 

L

, the split time and lap time for the lap whose time you just measured

appears for about five seconds in the display. Stopwatch timing continues inter-
nally.

After the above, the display automatically switches back to the normal stopwatch
(elapsed time) display. You can repeat the above step as many times as you like,
until 500 records are stored.

When memory becomes full (after 500 records are stored), the next store operation
causes the message “FULL” to appear on the display. The watch does not record
the new data. Always check how much memory capacity you have left before you
start recording important time data.
(Though there are no way to display how much memory is left.)

3. Press 

B

 to stop elapsed time measurement. The time on the display is stored as

the final lap time.

4. Press 

B

 again to reset the stopwatch to all zeros.

What you should do after you complete a RUN depends on what you want to do
with the data from the just-completed RUN, as described below.

To save the data of a just-completed RUN

After resetting the stopwatch to all zeros, hold down 

B

 until the RUN number in-

creases by one. This indicates that the next stopwatch operation will be stored as a
different RUN, leaving the data of the previous RUN in memory as well.

To delete the data of a just-completed RUN

You do not need to do anything. The next time you start a stopwatch operation, the
new RUN data will replace the data of the currently displayed RUN number.

To delete the data of a just-completed RUN and one RUN before it

While the stopwatch is reset to all zeros, hold down 

A

 until the RUN number de-

creases by one. The next time you start a stopwatch operation, the new RUN data
will replace the data of the currently displayed RUN number.

Deleting Data

Note that you can delete the data for the newest RUN only. If there is data for five
RUN in memory, for example, you could delete the data for RUN 5 only. Then you
could delete the data for RUN 4, RUN 3, and so on. You can use the Recall Mode to
delete all RUN data.

Holding down 

A

 in the Stopwatch Mode causes the RUN number to decrease by

one. The next time you start a stopwatch operation, the new RUN data will replace
the data of the currently displayed RUN number.

It may take a rather long time to perform delete or recall operations in the
Stopwatch Mode or Recall Mode when there is a lot of data stored in memory.

RECALL MODE

The Recall Mode is used to recall and delete data that is
stored by Stopwatch Mode operations.

Recalling Laps and Splits

1. In the Recall Mode, press 

B

 to scroll through RUN num-

bers, from the newest to the oldest (number 1). The
data includes the measurement date. (If the elapsed
time operation extends over two different days, only the
start date is recorded.)

Next 
newest
RUN

Newest
RUN

RUN 1

RUN numbers are assigned automatically to each RUN,
in sequence with the oldest RUN being 1, the next old-
est 2, etc.

2. When the RUN number for the data you want to see is on the display, press 

D

 to

switch to its Best Lap display. Now, each press of 

D

 scrolls the data in lap/split

number sequence. Holding down 

D

 scrolls at high speed.

Lap 2

Lap 1

Best
Lap

Final
Lap

RUN No.
& date

The watch can record up to 341 best laps. The data for any RUN after the 341st is
displayed without best lap data.

To delete all RUN data

Hold down 

A

 until the watch emits a beep and the message “CLR” flashes on the

display. That indicate the all of data is cleared.

You cannot delete data for a particular record or RUN in the Recall Mode. You only
can delete all data currently stored in memory.

Important!

You cannot delete data in the Recall Mode unless the stopwatch is reset to all
zeros. If it isn’t, enter the Stopwatch Mode, reset to all zeros, and then return to the
Recall Mode to delete the data.

ERROR Message

The message ERROR flashing on the display indicates that the battery is about
to go dead. When this happens, request battery replacement from your origi-
nal retailer or from an authorized CASIO distributor. You will not be able to
enter the Stopwatch Mode and Recall Mode while ERROR is flashing on the
display.

Mode indicator

RUN number

Measurement date

WORLD TIME MODE

The World Time Mode shows you the current time in 27
cities (30 time zones) around the world.

For full information on city codes, see the “CITY CODE
TABLE”.

The time setting of the Timekeeping Mode and the World
Time Mode are synchronized. Whenever you change
the time setting for any city in the Timekeeping Mode,
the settings of all World Time cities are changed ac-
cordingly.
The DST on/off setting, however, must be specified in-
dividually for each World Time city.

The format (12-hour and 24-hour) of the World Time
matches the format you select for Timekeeping Mode.

To select a World Time City and view its time

In the World Time Mode, press 

D

(+) or 

B

(–) to scroll through the city codes (time

zones). Holding down either button scrolls at high speed.

Daylight Saving Time (DST)

Daylight Saving Time automatically advances the time setting by one hour from Stan-
dard Time. You can make individual Daylight Saving Time settings for each city code
(time zone). Remember that not all countries or even local areas use Daylight Saving
Time.

To switch between Standard Time and Daylight Saving Time

1. In the World Time Mode, use 

D

(+) or 

B

(–) to display the city code (time zone)

whose standard time/daylight saving time setting you want to change.

2. Hold down 

A

 to toggle between Daylight Saving Time and Standard Time.

The  DST indicator appears on the display whenever you display a city code for
which daylight saving time is turned on.

ALARM MODE

 Mode indicator

Hour : Minutes

Alarm on indicator

Hourly time signal 
on indicator

Current time

DST on indicator

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 turned on, the watch beeps every hour on the hour.

To set the alarm time

1. Hold down 

A

 until the hour digits flash on the display, indicating the setting screen.

At this time, the alarm is turned on automatically.

2. Press 

C

 to move the flashing in the sequence shown below.

Hour

Minutes

3. Use 

D

(+) and 

B

(–) to change the setting. Holding down either button changes

the setting at high speed.

4. After you set the alarm time, press 

A

 to exit the setting screen.

The format (12-hour and 24-hour) of the alarm time matches the format you select
in the Timekeeping Mode.

When setting the alarm time using the 12-hour format, take care to set the time
correctly as morning or afternoon.

To stop the alarm

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

To turn the Daily Alarm or the Hourly Time Signal on and off

Press 

D

 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 OFF

Both ON

To test the alarm

In the Alarm Mode, hold down 

D

 to sound the alarm.

Holding down 

D

 to test the alarm also changes the Daily Alarm and Hourly Time

Signal on/off settings.

City code

World time

Current time of 
your home time

DST on indicator

Summary of Contents for G-2400

Page 1: ...SERVICE MANUAL PARTS LIST WITHOUT PRICE QW 2223 MODULE NO R REF NO S M 710 SEP 2000 G 2400 ...

Page 2: ...ay daylight saving on off 1 100 second stopwatch Measuring capacity 99 59 59 Measuring modes Elapsed time lap split time Memory capacity 500 lap split time records with lap split number Daily alarm Hourly time signal Auto calender to year 2039 12 24 hour formats Regular timekeeping Hour min sec pm month date day CONTENTS Page 1 SPECIFICATIONS QW 2223 1 2 OPERATION CHART QW 2223 2 3 DRAWINGS QW 222...

Page 3: ...se Daylight Saving Time ABOUT THE BACKLIGHT Pressing L in any mode except Stopwatch Mode illuminates the display for about 2 seconds Pressing D in the Stopwatch Mode illuminates the display for about 2 seconds 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 wa...

Page 4: ...red You cannot delete data for a particular record or RUN in the Recall Mode You only can delete all data currently stored in memory Important You cannot delete data in the Recall Mode unless the stopwatch is reset to all zeros If it isn t enter the Stopwatch Mode reset to all zeros and then return to the Recall Mode to delete the data ERROR Message The message ERROR flashing on the display indica...

Page 5: ...CAI CAI CAI CAI CAIRO ATHENS HELSINKI ISTANBUL BEIRUT JRS JRS JRS JRS JRS JERUSALEM DAMASCUS CAPE TOWN 3 JED JED JED JED JED JEDDAH MOSCOW KUWAIT RIYADH ADEN ADDIS ABABA NAIROBI 3 5 THR THR THR THR THR TEHRAN SHIRAZ 4 DXB DXB DXB DXB DXB DUBAI ABU DHABI MUSCAT 4 5 KBL KBL KBL KBL KBL KABUL 5 KHI KHI KHI KHI KHI KARACHI MALE 5 5 DEL DEL DEL DEL DEL DELHI MUMBAI CALCUTTA 6 DAC DAC DAC DAC DAC DHAKA ...

Page 6: ...X24Y4 L C 3 PM1 X0Y6 X1Y6 X2Y6 X3Y6 X4Y6 X5Y6 X6Y6 X7Y6 X8Y6 X9Y6 X10Y6 X11Y6 X12Y6 X13Y6 X14Y6 X15Y6 X16Y6 X17Y6 X18Y6 X19Y4 X20Y5 X21Y5 X22Y5 X23Y5 X24Y5 L C 4 d5 PM0 k4 k3 k2 k1 k0 DST0 k9 k8 k7 k6 k5 RECALL m4 m3 m2 m1 m0 AUTOEL X19Y5 X21Y6 X20Y6 X22Y6 X23Y6 X24Y6 L C 5 X1Y2 X0Y2 X0Y3 X1Y3 X2Y3 X3Y3 X4Y3 X5Y3 X6Y3 X7Y3 X8Y3 X9Y3 X10Y3 X11Y3 X12Y3 X13Y3 X14Y3 X15Y3 X16Y3 X17Y3 X18Y3 X19Y0 X20Y2...

Page 7: ...KI9 KC1 KC2 KC3 KC5 KC4 1 1 1 1 L1 L3 L57 L60 L56 LC1 LC5 LC6 VCCE SCL SDA WP SDI CSB VSS SDA A2 SCL A1 WP A0 VCC 1 1 1 PT 1 PTIN PX1 1 1 VAN VC2 VC1 VC4 VC3 BD1 VDD2 GND GNDA VDD3 VDD1 VDSP VOSC VCH VHF CRMS 1 CRST 1 CRIN 1 1 PY1 1 Vref 1 PW1 1 PY3 1 PX3 1 PU1 1 PZ1 1 PH 1 LE 1 ADIN 1 A2OUT 1 P0 1 SDD SCK SCUT No bonding KI5 Short Soldering KI6 Short Soldering KI7 Open No soldering 1 2 S2 S3 S4 S...

Page 8: ...C3 VDD2 CIL CIL ELD VDD2 GND GND GND EMP MP RT1 RT2 KC6 GND VDD2 ELD SD0 SCK WP VCC GND GND GND GND GND CIL GND XT Capacitor Chip C2 Capacitor Chip C5 Capacitor Chip C1 Capacitor Chip C6 Capacitor Chip C7 Capacitor Chip C3 Capacitor Chip Capacitor Tantalum C9 Capacitor Chip Capacitor Chip Capacitor Chip C11 C10 Resistor Chip Resistor Chip RT Resistor Chip R3 Transistor Tr1 RMP Transistor Tr2 Diode...

Page 9: ... EXPLODED VIEW QW 2223 1 1002 4518 12 1002 4512 2 1001 6311 Battery Lithium CR2016 3 7640 3596 PCB ass y 10 1001 6309 10 1001 6309 6 7236 0286 15 7230 0497 9 7231 1952 11 7233 0952 14 7201 9249 13 7230 0616 ...

Page 10: ...2223AT 01 1 A 3 7640 3596 PCB ASS Y Q254630 1TK QW 2223AT 01 1 A 4 1001 0950 CAPACITOR TRIMMER CTZ2E 30C W2 P QW 2223AT 01 1 B 5 7110 6323 OSCILLATOR CRYSTAL DT 26S11 QW 2223AT 01 1 B 6 7236 0286 CONTACT BATTERY 1650 Q357954C 1 QW 2223AT 01 1 C 7 7211 9631 CUSHION 506 Q49364 1 QW 2223AT 01 2 C 8 7211 0064 CUSHION 6 Q4914 1 QW 2223AT 01 1 C 9 7231 1952 HOLDER BATTERY 2058 Q253743 1 QW 2223AT 01 1 C...

Page 11: ...Push any button except for D button Then the display is returned to its original state NOTE The ACCURACY CHECKING MODE will automatically return to the regular mode in 1 2 hour s without any operation 6 PRECAUTIONS FOR REPAIR QW 2223 6 1 AC ALL CLEAR AND REMOVING OF MODULE 1 Perform AC ALL CLEAR when inserting a new battery or else the memories and or counters may give erratic displays Touch the A...

Page 12: ...CASIO TECHNO CO LTD Overseas Service Division Nishi Shinjuku Kimuraya Bldg 1F 5 25 Nishi Shinjuku 7 Chome Shinjuku ku Tokyo 160 0023 Japan ...

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