Casio QW-2516 Service Manual Download Page 3

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2. OPERATION CHART : MODULE QW-2516

If you do not perform any operation for a few minutes in the Day Counter
Mode or Telememo Mode, the watch automatically reverts to the normal
timekeeping screen.

General Guide

Press 

 to change from mode to mode.

Pressing 

 in any mode illuminates the display.

If you do not perform any operation for a few minutes while a setting screen
(with flashing digits) is on the display, the watch automatically exits the
setting screen.

Day Counter Mode

Telememo Mode

Stopwatch Mode

Alarm Mode

World Time Mode

Timekeeping Mode

Press .

Timekeeping Mode

Press 

 to toggle the display between the day of the week and month, as

shown below. 

.

Hour

Minutes

City code

Seconds

DST on indicator

Day

Month

Day of week

Press .

Press 

 to toggle between 12-hour and 24-hour formats.

With 12-hour format, times between midnight and noon are indicated by 
(am), while times between noon and midnight are indicated by  (pm).

The   and   indicators do not appear when you are using 24-hour format.

To set the time and date
1. While in the Timekeeping Mode, hold down 

 until the secondís digits flash

on the display, which indicates the setting screen.

2. Press 

 to move the flashing in the sequence shown below.

DST

Seconds

Month

Day

City code

Minutes

Year

Hour

3. While the seconds setting is selected (flashing), press 

 to reset it to 00. If

you press 

 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.

While the DST  setting is selected (DST on indicator is flashing), press 
to toggle it on (

) and off (

).

The DST on/off setting you make for the Timekeeping Mode does not
affect the World Time Mode.

While the city codes setting is selected, use 

 to scroll through the

available codes until the one you want to use as your home time city is
displayed.

For full information on city codes, see the “City Code Table” at the back of
this manual.

4. While any other setting is selected (flashing), press 

 to increase it.

Holding down 

 changes the setting at high speed.

5. Press 

 to exit the setting screen.

The day of the week is automatically set in accordance with the date.

The date can be set within the range of January 1, 2000 to December 31,
2039.

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.

Backlight Precautions
The backlight uses an EL (electro-luminescent) panel that causes the entire
display to glow for easy reading in the dark.
In any mode, press 

 to illuminate the display for about three seconds.

The electro-luminescent panel that provides illumination loses power after
very long use.

The illumination provided by the backlight may be hard to see when viewed
under direct sunlight.

The watch may emit an audible sound whenever the display is illuminated.
This is due to vibration of the EL panel used for illumination, and does not
indicate malfunction.

The backlight automatically turns off whenever an alarm sounds.

Frequent use of the backlight shortens the battery life.

World Time Mode

Hour : Minutes

Seconds

Day

Day of week

Mode indicator

City code

Month

[Month-day display]

DST on indicator

The World Time Mode shows the current time in 40 cities (27 time zones)
around the world. The lower part of the display shows either the day of the
week and day, or the month and day. The format used is the one you select in
the Timekeeping Mode before entering the World Time Mode.

For full information on city codes, see the “City Code Table” at the back of
this manual.

The time setting of the Timekeeping Mode and the World Time Mode are
synchronized, except for the Daylight Saving Time (summer time) setting.
Whenever you change the time setting for any city in the Timekeeping Mode,
the settings of all World Time cities are changed accordingly.

The World Time Mode has its own Daylight Saving Time (summer time)
setting.

To select a World Time City and view its time
In the World Time Mode, press 

 to scroll through city codes (time zones) to

the east or 

 to scroll to the west. Holding down 

 or 

 scrolls at high

speed.

You can set up an alarm in the Alarm Mode so it operates based on the
current time in a city you specify in the World Time Mode.

Daylight Saving Time (DST)
Daylight Saving Time automatically advances the time setting by one hour from
Standard Time. You cannot make individual Daylight Saving Time settings for
each city code (time zone). Turning on Daylight Saving Time affects all World
Time time zones. Remember that not all countries or even local areas use
Daylight Saving Time.

To switch between Standard Time and Daylight Saving Time
In the World Time Mode, hold down 

 to toggle between Daylight Saving

Time and Standard Time.

DST OFF

DST ON

Hold down 

.

DST on indicator

Day Counter Mode

The Day Counter Mode lets you count the number of days from the
Timekeeping Mode’s current date to a specific target date.
This watch has five day counters. You can assign text titles up to eight
characters long to each of the five Day Counters. Whenever the date specified
by any one of the day counters matches the date of the Timekeeping Mode
(regardless of the day counter’s year setting), the DAYS indicator flashes on
the Timekeeping Mode. In the Day Counter Mode, the DAYS indicator flashes
on the screen of the particular day counter whose date matches the date of the
Timekeeping Mode.
The initial default date for all Day Counters is January 1, 2001.

Year

Month - Day

Target date

Numbers of days

Text

DAYS indicator

Mode indicator

Alternate at 
the 1-second 
interval.

The day counter on the display when you exit the Day Counter Mode
appears first the next time you enter the Day Counter Mode.

Recalling Day Counter Data
In the Day Counter Mode, use 

(+) and 

(–) to scroll through the day

counters.

To set the target date
1. In the Day Counter Mode, use 

(+) and 

(–) to scroll through the day

counter you want to set.

2. Hold down 

 until the flashing cursor appears in the text area. This

indicates the input screen.

3. Press 

 to move the flashing in the sequence shown below.

1st digit

Day

8th digit

Year

Month

Press .

C

C

C

C

C

D

D

D

D

D

D

D

D

D

D

D

L

L

L

B

B

B

D

B

B

B

A

A

A

A

C

D

L

B

B

A

C

D

L

B

A

C

C

D

L

B

A

C

D

B

A

A

A

Summary of Contents for QW-2516

Page 1: ... WITHOUT PRICE SERVICE MANUAL PARTS LIST REF NO S M 769 APRIL 2002 QW 2516 MODULE NO R BGR 250V ...

Page 2: ...0 25 0 35sec day Function Shock resistant Electro luminescent backlight Afterglow Memory Memory capacity Up to 20 sets of data each set including Name 8 characters and telephone number 12 digits World time 27 time zones 40 cities city code display daylight saving on off Day Counter Automatically counts down the days from the current date to a target date Memory capacity 5 records 8 characters each...

Page 3: ...display is illuminated This is due to vibration of the EL panel used for illumination and does not indicate malfunction The backlight automatically turns off whenever an alarm sounds Frequent use of the backlight shortens the battery life World Time Mode Hour Minutes Seconds Day Day of week Mode indicator City code Month Month day display DST on indicator The World Time Mode shows the current time...

Page 4: ...me split times and two finishes The display range of the stopwatch is 23 hours 59 minutes 59 99 seconds The stopwatch continues to run restarting from zero after it reaches its limit until you stop it The stopwatch measurement operation continues even if you exit the Stopwatch Mode Exiting the Stopwatch Mode while a split time is frozen on the display clears the split time and returns to elapsed t...

Page 5: ... X16Y2 X1Y5 X2Y5 X3Y5 X0Y5 X4Y5 X5Y5 X6Y5 X7Y5 X8Y5 X10Y5 X11Y5 X12Y5 X9Y5 X13Y5 X14Y5 X15Y5 X16Y5 c4 X1Y4 X2Y4 X3Y4 X0Y4 X4Y4 X5Y4 X6Y4 X7Y4 X8Y4 X10Y4 X11Y4 X12Y4 X9Y4 X13Y4 X14Y4 X15Y4 X16Y4 b4 g4 PM X4Y6 d4 X5Y6 X6Y6 X7Y6 X8Y6 X10Y6 X11Y6 X12Y6 X9Y6 ALM c4 f4 SIG f5 K0 e5 DAYS b5 DST b1 g1 d1 b2 f1 c5 c6 K2 b6 d5 a5 X12Y0 X11Y0 X11Y2 X10Y0 X9Y0 X8Y0 X8Y2 X7Y0 X6Y0 g5 e6 K1 b7 c7 d7 g7 a7 a9 d6...

Page 6: ...S1 VSS3 AC VDD VDD XT XT XTB KI2 KI2 KI7 KI7 KC3 KC2 N3 N2 N1 N4 VDD VDD VDD VDD VDD SE KI5 KI5 SF TB PF VDD 3 PCB ass y 7640 5308 Resistor Chip R Transistor Tr Transistor Tr2 Transistor Tr3 Transfurmer Tns1 Capacitor Tantalum C5 Capacitor Tantalum C7 Capacitor Chip C4 4 Capacitor Trimmer 1001 0950 CT 7 Cushion 506 7211 9631 8 Cushion 6 7211 0064 Xtal 5 Oscillator Crystal 7110 6316 C1 Capacitor Ch...

Page 7: ...0 5308 PCB ass y 2a 7020 6090 2b 1001 3459 2c 7020 6092 2d 7020 6144 2e 1002 4508 2f 1002 4507 12 7230 0378 Battery Lithium CR1616 1 1007 6114 11a 1007 6113 11b 1007 6115 11c 1007 6116 11d 1007 6117 4 EXPLODED VIEW QW 2516 6 1002 7903 10 7424 3212 ...

Page 8: ... Common 1 A 2a 7020 6090 EL YEL 1951 A 03 QW 2516AT 01TK 1 A 2b 1001 3459 EL YEL 1951 A 01 QW 2516AT 02TK 1 A 2c 7020 6092 EL YEL 1951 A 63 QW 2516AT 03TK 07TK 1 A 2d 7020 6144 EL YEL 1951 A 53 QW 2516AT 04TK 1 A 2e 1002 4508 EL YEL 1951 A 33 QW 2516AT 05TK 08TK 1 A 2f 1002 4507 EL YEL 1951 A 13 QW 2516AT 06TK 1 A 3 7640 5308 PCB ASS Y Q255515 1TK QW 2516AT Common 1 A 4 1001 0950 CAPACITOR TRIMMER...

Page 9: ...pointed by arrows 6 2 ACCURACY CHECKING Check the accuracy of the module with the quartz timer after switching the module to ACCURACY CHECKING MODE The operations are shown below A SWITCHING TO ACCURACY CHECKING MODE While pressing the C button press the A and B buttons at the normal time keepingmode Then all the segments are displayed and the LCD drive signals are changed to the static drive sign...

Page 10: ...Nishi Shinjuku Kimuraya Bldg 1F 5 25 Nishi Shinjuku 7 Chome Shinjuku ku Tokyo 160 0023 Japan Printed in Japan Overseas Service Division CASIO TECHNO CO LTD EI0400621A ...

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