Casio QW-2957 Service Manual And Parts List

SERVICE MANUAL

& PARTS LIST

REF. NO. S/M-906

AUG. 2005

MODULE NO.

QW-2957

G-7600

Ver.1 : Sep. 2005

R

(WITHOUT PRICE)

CONTENTS

Page

1. SPECIFICATIONS ......................................................................................... 1

2. OPERATION CHART: MODULE QW-2957 .................................................. 2

3. DRAWINGS: MODULE QW-2957

3-1. LCD DIAGRAM ..................................................................................................6

3-2. CIRCUIT DIAGRAM ...........................................................................................7

3-3. CHECKING TERMINALS AND COMPONENT .................................................8

4. EXPLODED VIEW: MODULE QW-2957 ....................................................... 9

5. PARTS LIST: MODULE QW-2957 .............................................................. 10

6. PRECAUTIONS FOR REPAIR: MODULE QW-2957

6-1. AC (ALL CLEAR) AND REMOVING OF MODULE ........................................ 11

6-2. ACCURACY CHECKING ................................................................................ 11

1. SPECIFICATIONS: MODULE QW-2957

Item Detail

Battery CR2016
Battery life Approx. 5 years
Current consumption 1.4 µA maximum
Alarm system Piezo plate on Back cover
Accuracy ±15 sec./month
Accuracy setting system Chip capacitor selection
Accuracy checking See page 11
Functions: • Shock resistant (G-SHOCK)

• Electro-luminescent backlight
Auto light switch, afterglow

• e-DATA MEMORY
Memory capacity: Up to 40 records for Internet access codes and other

data (when there are 7 characters per record), actual number of records
depends on the number of characters per record.

Other: Password

• World time
29 time zones (27 cities), city code display, daylight saving on/off

• 1/100-sec. stopwatch
Measuring capacity: 23:59'59.99"
Measuring modes: Elapsed time, split time, 1st-2nd place times

• Countdown timer
Input range: 1 min. to 24 hr.
Unit: 1 sec.
Other : Auto-repeat

• Multi alarms
5 independent multi alarms (4 one-time alarms and 1 snooze alarm)
Other: Schedule text (8 characters)

• Hourly time signal

• Auto-calendar (to year 2039)

• 12/24-hour format

• Regular timekeeping: Hr, min, sec, am/pm, month, date, day

— 1 —

2. OPERATION CHART: MODULE QW-2957

g

About This Manual

• Depending on the model of your watch, display text
appears either as dark figures on a light background or
light figures on a dark background. All sample displays
in this manual are shown using dark figures on a light
background.

• Button operations are indicated using the letters shown
in the illustration.

• Each section of this manual provides you with the

(Light)

(Light)

information you need to perform operations in each
mode. Further details and technical information can be
found in the “Reference” section.

General Guide

• Press C to change from mode to mode.

• In any mode, press L to illuminate the display.

Timekeeping Mode World Time Modee-DATA MEMORY Mode Stopwatch ModeCountdown Timer ModeAlarm Mode

Press .

Timekeeping

PM indicator

Day of week

Month – Day

Hour : Minutes Seconds

To set the time and date

City code

Seconds City Code

3. When the setting you want to change is flashing, use D and B to change it as
described below.

Screen

50

OFF

TYO

P

10:58

12H

2005

6-30

•

For full information on city codes, see the “City Code Table”.

• See “Daylight Saving Time (DST)” for details about DST setting.

4. Press A to exit the setting screen.

• With the 12-hour format, the P (PM) indicator appears on the display for times in the

range of noon to 11:59 p.m. and the A (AM) indicator appears for times in the range
of midnight to 11:59 a.m.

• With the 24-hour format, times are displayed in the range of 0:00 to 23:59, without

any indicator.

• The 12-hour/24-hour timekeeping format you select in the Timekeeping Mode is

applied in all modes.

• The day of the week is automatically displayed in accordance with the date (year,

month, and day) settings.

Daylight Saving Time (DST)

Daylight Saving Time (summer time) advances the time setting by one hour from
Standard Time. Remember that not all countries or even local areas use Daylight
Saving Time.

Use the Timekeeping Mode to set and view the current
time and date.

Read This Before You Set the Time and Date !

The times displayed in the Timekeeping Mode and World
Time Mode are linked. Because of this, make sure you
select a city code for your Home City (the city where you
normally use the watch) before you set the time and date.

1.In the Timekeeping Mode, hold down A until the
seconds start to flash, which indicates the setting
screen.

2.Press C to move the flashing in the sequence shown
below to select other settings.

DST

12/24-Hour
Format

OFF

YearDay

00

)

12H

) and 24-

Month

To do this:

Reset the seconds to
Toggle between Daylight Saving Time (ON)

and Standard Time (
Change the city code
Change the hour or minutes
Toggle between 12-hour (

24H

) timekeeping

hour (
Change the year
Change the month or day

Hour

Minutes

Do this:

Press D.
Press D.

Use D (east) and B (west).
Use D (+) and B (–).
Press D.

Use D (+) and B (–).

To toggle the Timekeeping Mode time between DST and Standard Time

e-DATA MEMORY

Record number
(Pa

To create a new e-DATA MEMORY record

Remaining memory (%)

• Pressing A causes the message
is stored. After that, the e-DATA MEMORY record screen appears.

• The text can show only three characters at a time, so longer text scrolls continuously
from right to left. The last character is indicated by the symbol
stop and restart scrolling.

• Records are stored in memory in the sequence they are created.

ext

T

e number)

1.In the Timekeeping Mode, hold down A until the
seconds start to flash, which indicates the setting
screen.

2.Press C to display the DST setting screen.

3.Press D to toggle between Daylight Saving Time

ON

(

displayed) and Standard Time (

• Note that you cannot switch between Standard Time

and Daylight Saving Time while
the Home City code.

4.Press A to exit the setting screen.

• The DST indicator appears on the display to indicate

that Daylight Saving Time is turned on.

You can use the watch’s e-DATA MEMORY to store e-mail
addresses, Web page URLs, and other text data.
You can also use a password to limit access to e-DATA
MEMORY contents.

• All of the operations in this section are performed in the

e-DATA MEMORY Mode, which you enter by pressing
C.

e-DATA MEMORY Management

e-DATA MEMORY can hold up to 315 characters total,
while each record can contain up to 63 characters. The
maximum number of records depends on the number of
characters per record, as shown below.

• 63 characters per record: 5 records

• 7 or fewer characters per record: 40 records

1.In the e-DATA MEMORY Mode, press D and B at the
same time to display the remaining memory screen.

0

• If

% is shown for remaining memory, it means that
memory is full. To store another record, you will first
have to delete some of the records stored in memory.

2.Hold down A until the flashing cursor (
the display, which indicates the setting screen.

• The setting screen also shows the record number that

is automatically assigned to the new record.

3.Input the text you want.

• When inputting the text, use D (+) and B (–) to

cycle through characters at the current cursor
location, and C to move the cursor to the right. See
“Inputting Text”.

4.Press A to store your data and return to the e-DATA
MEMORY record screen (without the cursor).

SET

to appear for about two seconds as the data

OFF

displayed).

GMT

is selected as

) appears on

#

s

after it. Press A to

— 2 —

To recall e-DATA MEMORY records

In the e-DATA MEMORY Mode, use D (+) and B (–) to cycle through e-DATA
MEMORY records as shown below.

Press .

Record 1

()

Record 2

()

Remaining
memory
screen

Password
setting
screen

Press .

Remaining Memory Screen Password Setting Screen

• The value on the remaining memory screen is the percentage of memory that is still
available. It does not indicate the number of records that can be stored.

• The Password Setting screen shows

• You can use the Password Setting screen to register, edit, or delete your password.

See “Using a Password to Protect e-DATA MEMORY Data” for more information.

To edit an e-DATA MEMORY record

1. In the e-DATA MEMORY Mode, use D (+) and B (–) to display the record you

want to edit.

2. Hold down A until the flashing cursor appears on the display.

3. Use C to move the flashing to the character you want to change.

4. Use D (+) and B (–) to change the character.

5. After making the changes you want, press A to store them and return to the

e-DATA MEMORY record screen.

To delete an e-DATA MEMORY record

1. In the e-DATA MEMORY Mode, use D (+) and B (–) to display the record you

want to delete.

2. Hold down A until the flashing cursor appears on the display.

3. Press B and D at the same time to delete the record.

• The message
record is deleted, the cursor appears on the display, ready for input.

4. Input data or press A to return to the remaining memory screen.

Using a Password to Protect e-DATA MEMORY Data

You can register a 4-digit password to keep e-DATA MEMORY data secure.

Important!

Use a 4-digit password that is easy for you to remember, but difficult for others to
decipher. If you forget the password, you will have to have your watch initialized
(which deletes all data in memory) in order to access the e-DATA MEMORY again. To
have the watch initialized, contact the store or dealer where you purchased it, and ask
to have the AC operation performed.

CLR

appears to indicate that the record is being deleted. After the

To register a new password

4. When the first digit is the number you want, press C to advance to the next digit.

5. Repeat steps 3 and 4 to input all four digits of the password you want.

• Pressing A while inputting a new password clears your input and returns to the
Password Setting screen.

6. After all four of the password digits are the way you want, press C to register
them.

• Pressing C causes the message

password is stored. After that, the Password Setting screen appears.

• After registering a password, you can input, recall, edit and delete data, if you want.

After you exit the e-DATA MEMORY Mode, you will have to input the password
every time you want to enter it again.

To input the password

To change the password

1. Enter the e-DATA MEMORY Mode by inputting the current password.

2. Use D (+) and B (–) to display the Password Setting screen.

3. Perform the procedure starting from step 2 under “To register a new password” to
specify the new password.

To delete the password

1. Enter the e-DATA MEMORY Mode by inputting the current password.

2. Use D (+) and B (–) to display the Password Setting screen.

3. Hold down A for about one second until

4. Press B and D at the same time to delete the password.

• The message

password is deleted, the Password Setting screen appears.

CLR

appears to indicate that the password is being deleted. After the

xxxx

when a password is already registered.

1.In the e-DATA MEMORY Mode, use D (+) and B (–)
to display the Password Setting screen.

• This displays a screen that shows

2.Hold down A for about one second until
appears, with the first

• This is the New Password Setting screen.

3.Use D (+) and B (–) to scroll through numbers at the
first digit.

SET

1.Enter the e-DATA MEMORY Mode.

2.On the Password Input screen (
or B. This causes the first digit of the password to
flash.

3.Input the password.

• Use D (+) and B (–) to scroll through numbers at

each digit.

• Press C to advance to the next digit.

• Pressing A while inputting the password clears your

input and returns to the Password Input screen.

4.After the password is the way you want, press C.

• If the input password matches the one registered, the

message

OK!

MEMORY screen.

• If the password does not match, the message

appears, followed by the Password Input screen.

0

flashing.

to appear for about one second as the

appears, followed by an e-DATA

NEW

appears, with the first

SET

xxxx PASS

PASS

NEW

), press D

ERR

0

flashing.

.

World Time

City code

Timekeeping
Mode time

Current time in the zone
of the selected city code

To toggle a city code time between Standard Time and Daylight Saving Time

World Time shows the current time in 27 cities (29 time
zones) around the world.

• All of the operations in this section are performed in the
World Time Mode, which you enter by pressing C.

To view the time in another city code

In the World Time Mode, press D to scroll through city
codes (time zones) to the east or B to scroll to the west.

• For full information about city codes, see the “City Code
Table”.

• If the current time shown for a city is wrong, check your
Timekeeping Mode time and Home City code settings
and make the necessary changes.

• When the currently selected time zone is one that includes
mostly ocean, a value indicating the zone’s Greenwich
Mean Time differential appears in place of a city code.

1.In the World Time Mode, use B and D to display the

city code (time zone) whose Standard Time/Daylight
Saving Time setting you want to change.

2.Hold down A for about one second to toggle Daylight

Saving Time (DST displayed) and Standard Time (DST
not displayed).

• The DST indicator is on the display whenever you
display a city code for which Daylight Saving Time is
turned on.

• Note that the DST/Standard Time setting affects only the
currently displayed city code. Other city codes are not
affected.

• Note that you cannot switch between Standard Time
and Daylight Saving Time while
city code.

GMT

is selected as the

Alarms

Alarm number

Timekeeping Mode
time

Alarm time
(Hour : Minutes)

• Alarm settings (and Hourly Time Signal settings) are available in the Alarm Mode,
which you enter by pressing C.

Alarm Types

The alarm type is determined by the settings you make, as described below.

• Daily alarm

Set the hour and minutes for the alarm time. This type of setting causes the alarm to
sound everyday at the time you set.

• 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-Month alarm

Set the month, hour and minutes for the alarm time. This type of setting causes the
alarm to sound everyday at the time you set, only during the month you set.

• Monthly alarm

Set the day, hour and minutes for the alarm time. This type of setting causes the alarm
to sound every month at the time you set, on the day you set.

To set an alarm time

• To set a one-time alarm, display one of the screens indicated by an alarm number
from

AL1

through

by

SNZ

.

• The snooze alarm repeats every five minutes.

2. After you select an alarm, hold down A until the hour setting of the alarm time
starts to flash, which indicates the setting screen.

• This operation automatically turns on the alarm.

3. Press C to move the flashing in the sequence shown below to select other settings.

Hour TextMinutes Month Day

• Selecting the text causes the text input cursor (#) to appear. There are eight

spaces in the text, so you have to press C eight times to move to the Hour
setting.

4. While a setting is flashing, use D, B, and C to change it as described below.

Screen

To do this:

Change the hour

A

12:00

and minutes
Change the

x-xx

month and day
Input reminder

#

text

You can set up to five independent multi-function alarms
with hour, minutes, month, and day. When an alarm is
turned on, the alarm tone sounds when the alarm time is
reached. One of the alarms is a snooze alarm, while the
other four are one-time alarms. You can also input
reminder text that appears when the alarm time is
reached.
You can also turn on an Hourly Time Signal that causes
the watch to beep twice every hour on the hour.

• There are five alarm screens numbered

AL4

for the one-time alarm, a snooze alarm screen
indicated by
indicated by

• In the case of the snooze alarm screen, the snooze
alarm indicator (
of the display.

1.In the Alarm Mode, use D and B to scroll through the

SNZ

. The Hourly Time Signal screen is

SIG

.

) appears in the lower right corner

alarm screens until the one whose time you want to set
is displayed.

Press .

AL4

. To set the snooze alarm, display the screen indicated

Do this:

Use D (+) and B (–).

• With the 12-hour format, set the time correctly as a.m.
(A indicator) or p.m. (P indicator).

• To set an alarm that does not include a month and/or
day, set

for each setting.

Use D (+) and B (–) to cycle through characters at the
current cursor location, and C to move the cursor to the
right. See “Inputting Text”.

AL1

Press .

through

— 3 —

g

• Pressing B and D at the same time while any setting is flashing automatically
sets the time to AM12:00 and the date to
for the alarm.

Alarm on indicator

Snooze alarm indicator

Alarm Operation

Graphic area

• If you input reminder text for an alarm, the text appears for one minute on the
Timekeeping Mode screen when the alarm time is reached. You can clear the
reminder text display by pressing A , B , or D , or by exiting the Timekeeping
Mode.
In the case of the snooze alarm, the reminder text appears on the Timekeeping•
Mode screen for the initial alarm operation only.

• Performing any one of the following operations during a 5-minute interval between
snooze alarms cancels the current snooze alarm operation.

Displaying the Timekeeping Mode setting screen
Displaying the
Changing the DST setting of the Home City code in the World Time Mode

To test the alarm

In the Alarm Mode, hold down D to sound the alarm.

To turn an alarm on and off

Alarm on indicator

To turn the Hourly Time Signal on and off

Hourly time signal on
indicator

5.Press A to exit the setting screen.

• If you input reminder text, the text appears in place of
the alarm number.

• If the reminder text is more than three characters, it will
scroll form right to left.

• If the alarm has a month and/or day setting, the month/
day appears at the bottom of the display, in place of the
Timekeeping Mode time.

All of the graphic area segments start to flash, starting
from the point the Timekeeping Mode time reaches one
hour before an alarm time. This pre-alarm feature lets you
know that an alarm time is about to be reached.
The alarm tone sounds at the preset time for 10 seconds,
regardless of the mode the watch is in. In the case of the
snooze alarm, the alarm operation is performed a total of
seven times, every five minutes, until you turn the alarm
off.

• To stop the alarm tone after it starts to sound, press any
button.

• The pre-alarm feature works in the Timekeeping Mode
only. To stop the pre-alarm after it starts, press any
button. Note, however, that pressing C also changes to
the e-DATA MEMORY Mode.

SNZ

setting screen

1.In the Alarm Mode, use D and B to select an alarm.

2.Press A to toggle it on and off.

• Turning on a alarm (
the alarm on indicator (
screen.

• In all modes, the alarm on indicator is shown for any
alarm that is currently turned on.

• The alarm on indicator flashes while the alarm is
sounding.

• The snooze alarm indicator (
snooze alarm is sounding and during the 5-minute intervals
between alarms.

1.In the Alarm Mode, use D and B to select the Hourly

Time Signal (

2.Press A to toggle it on (

• The Hourly Time Signal on indicator (
on the display in all modes while this function is turned
on.

x-xx

. It also clears any text that is input

AL1

to

AL4

, or

) on its Alarm Mode

) flashes while the

SIG

).

ON

) and off (

OFF

SNZ

).

) displays

) is shown

Countdown Timer

Hours

Minutes

Mode time

Timekeepin

To use the countdown timer

Press D while in the Countdown Timer Mode to start the countdown timer.

• When the end of the countdown is reached and auto-repeat is turned off, the alarm
sounds for 10 seconds or until you stop it by pressing any button. The countdown
time is automatically reset to its starting value after the alarm stops.

• When the end of the countdown is reached and auto-repeat is turned on, the alarm
sounds, but the countdown starts again automatically whenever the countdown
reaches zero.

• The countdown timer measurement operation continues even if you exit the
Countdown Timer Mode.

• Press D while a countdown operation is in progress to pause it. Press D again to
resume the countdown.

• To completely stop a countdown operation, first pause it (by pressing D), and then
press B. This returns the countdown time to its starting value.

You can set the countdown timer within a range of

Seconds

one minute to 24 hours. An alarm sounds when the
countdown reaches zero.

• You can also select auto-repeat, which automatically
restarts the countdown from the original value you set
whenever zero is reached.

• The initial default countdown start time when you
purchase the watch or after you have its battery
replaced is 15 minutes.

• Countdown timer functions are available in the
Countdown Timer Mode, which you can enter using C.

To set up the countdown timer

1.While the countdown start time is on the display in the
Countdown Timer Mode, hold down A until the hour
setting of the countdown start time starts to flash, which
indicates the setting screen.

• If the countdown start time is not displayed, use the

procedure “To use the countdown timer” to display it.

2.Press C to move the flashing in the sequence shown
below to select other settings.

Hours

Minutes

Auto-repeat

3. While a setting is flashing, use D and B to change it as described below.

Screen

To do this:

0:15

OFF

• To specify a countdown start time of 24 hours, set

4. Press A to exit the setting screen.

•

The auto-repeat on indicator ( ) appears on the display while this function is turned on.

• Frequent use of auto-repeat and the alarm can run down battery power.

Change the hours or minutes
Toggle auto-repeat on (

ON

) and off (

OFF

)

0:00

Do this:

Use D (+) and B (–).
Press D.

.

Stopwatch

1/100 second

Hours

Seconds

Minutes

To measure times with the stopwatch

Elapsed Time

Start

Split Time

Start

Two Finishes

Start

• The time on the screen may not appear to stop immediately when you press a
button to stop timing or to perform a split operation. Despite this, the time recorded
by your button operation is accurate.

The stopwatch lets you measure elapsed time, 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 time measurement.

• All of the operations in this section are performed in the
Stopwatch Mode, which you enter by pressing C.

Stop Re-start Stop Clear

Split

( displayed)

Split Stop Split release Clear

First runner finishes.
Display time of first
runner.

Split release Stop Clear

Second runner
finishes.

Display time of
second runner.

Backlight

Auto light switch on
indicator

About the Auto Light Switch

Turning on the auto light switch causes the backlight to turn on for about one second,
whenever you position your wrist as described below in any mode.

Moving the watch to a position that is parallel to the ground and then tilting it
towards you at more than 40 degrees causes the backlight to turn on.

• Wear the watch on the outside of your wrist.

Warning!

• Always make sure you are in a safe place whenever you are reading the

display of the watch using the auto light switch. Be especially careful when
running or engaged in any other activity that can result in accident or injury.
Also take care that sudden illumination by the auto light switch does not
startle or distract others around you.

• When you are wearing the watch, make sure that its auto light switch is turned

off before riding on a bicycle or operating a motorcycle or any other motor
vehicle. Sudden and unintended operation of the auto light switch can create
a distraction, which can result in a traffic accident and serious personal injury.

The backlight uses an EL (electro-luminescent) panel that
causes the entire display to glow for easy reading in the
dark. The watch’s auto light switch automatically turns on
the backlight when you angle the watch towards your
face.

• The auto light switch must be turned on (indicated by
the auto light switch on indicator) for it to operate.

• See “Backlight Precautions” for other important
information about using the backlight.

To turn on the backlight manually

In any mode, press L to illuminate the display for about
one second.

• The above operation turns on the backlight regardless
of the current auto light switch setting.

Parallel to ground More than 40

°

— 4 —

To turn the auto light switch on and off

In the Timekeeping Mode, hold down L for about one second to toggle the auto light
switch on (

• The auto light switch on indicator (

• In order to protect against running down the battery, the auto light switch

displayed) and off ( not displayed).
light switch is turned on.
automatically turns off approximately six hours after you turn it on. Repeat the above

procedure to turn the auto light switch back on if you want.

) is on the display in all modes while the auto

Reference

This section contains more detailed and technical information about watch operation.
It also contains important precautions and notes about the various features and
functions of this watch.

Graphic Area

The following describes the information indicated by the graphic area in each mode.

• In the Timekeeping Mode, World Time Mode, and Alarm Mode, the graphic area
indicates the passage of each second of the current time (Timekeeping Mode time).

• In the e-DATA MEMORY Mode, the graphic area indicates the number at the
flashing digit during password input.

• In the Countdown Timer Mode, the graphic area indicates the passage of each
second of the countdown.

• In the Stopwatch Mode, the graphic area indicates the passage of each 1/10 second
of the elapsed time.

Seconds secondInput number 1/10

e-DATA MEMORY Mode Stopwatch ModeTimekeeping Mode

Inputting Text

Cursor

(space)

2. When the character you want is at the cursor position, press C to move the cursor

to the right.

3. Repeat steps 1 and 2 to input the rest of the characters you want.

• See the “Character List” for information about the characters you can input.

Auto Return Features

• If you leave the watch in the e-DATA MEMORY or Alarm Mode for two or three
minutes without performing any operation, it automatically changes to the
Timekeeping Mode.

• If you leave a screen with flashing digits or a cursor on the display for two or three
minutes without performing any operation, the watch automatically exits the setting
screen. Except for password input, any settings you have made up to that point are
saved automatically.

Scrolling

The B and D buttons are used in various modes and setting screens to scroll
through data on the display. In most cases, holding down these buttons during a scroll
operation scrolls at high speed.

Initial Screens

When you enter the e-DATA MEMORY, World Time, or Alarm Mode, the data you were
viewing when you last exited the mode appears first.

Timekeeping

• Resetting the seconds to
causes the minutes to be increased by 1. In the range of 00 to 29, the seconds are

00

reset to

• The year can be set in the range of 2000 to 2039.

• The watch’s built-in full automatic calendar makes allowances for different month

World Time

• The current time in all World Time Mode cities is calculated in accordance with the

• The seconds count of the World Time is synchronized with the seconds count of the

• The GMT differential is the time difference of the time zone where the city is located

• GMT differential is calculated by this watch based on Universal Time Coordinated

Backlight Precautions

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

• The illumination provided by the backlight may be hard to see when viewed under

• The watch may emit an audible sound whenever the display is illuminated. This is

• The backlight automatically turns off whenever an alarm sounds.

• Frequent use of the backlight shortens the battery life.

without changing the minutes.

lengths and leap years. Once you set the date, there should be no reason to change
it except after you have the watch’s battery replaced.

Greenwich Mean Time (GMT) differential for each city, based on the current Home
City time setting in the Timekeeping Mode.

Timekeeping Mode.
from Greenwich Mean Time.
(UTC) data.

use.
direct sunlight.
due to vibration of the EL panel used for illumination, and does not indicate

malfunction.

The following describes how to input text in the e-DATA
MEMORY and Alarm Modes.

To input characters

1.When the cursor is on the display, use D and B to
cycle through the available letters, numbers and
symbols, in the sequence shown below.

Press . Press .

to

(lower-case)

to

(symbol)

00

while the current count is in the range of 30 to 59

(upper-case)

to

(number)

to

Auto light switch precautions

• Wearing the watch on the inside of your wrist and movement or vibration of your arm
can cause the auto light switch to activate and illuminate the display. To avoid
running down the battery, turn off the auto light switch whenever engaging in
activities that might cause frequent illumination of the display.

• Under certain conditions, the backlight may not light until about one second after
you turn the face of the watch towards you. This does not necessarily indicate
malfunction of the backlight.

• You may notice a very faint clicking sound coming from the watch when it is shaken
back and forth. This sound is caused by mechanical operation of the auto light
switch, and does not indicate a problem with the watch.

• The backlight may not light if the face of the watch is
more than 15 degrees above or below parallel. Make
sure that the back of your hand is parallel to the ground.

• The backlight turns off in about one second, even if you
keep the watch pointed towards your face.

• Static electricity or magnetic force can interfere with
proper operation of the auto light switch. If the backlight
does not light, try moving the watch back to the starting
position (parallel with the ground) and then tilt it back
toward you again. If this does not work, drop your arm
all the way down so it hangs at your side, and then bring
it back up again.

Character List

City Code Table

City

City

Code Differential

– – ––11.0 Pago Pago
HNL Honolulu –10.0 Papeete

Anchorage

ANC
LAX Los Angeles –08.0
DEN Denver –07.0 El Paso, Edmonton

CHI Chicago –06.0

NYC New York –05.0
CCS Caracas –04.0 La Paz, Santiago, Port Of Spain

RIO Rio De Janeiro –03.0 Sao Paulo, Buenos Aires, Brasilia, Montevideo
– – ––02.0
– – ––01.0 Praia
GMT
LON London

PAR Paris +01.0

CAI Cairo
JRS Jerusalem
JED Jeddah +03.0 Kuwait, Riyadh, Aden, Addis Ababa, Nairobi, Moscow
THR Tehran +03.5 Shiraz
DXB Dubai +04.0 Abu Dhabi, Muscat
KBL Kabul +04.5

KHI Karachi +05.0 Male
DEL Delhi +05.5 Mumbai, Kolkata
DAC Dhaka +06.0 Colombo

Yangon

RGN

Bangkok

BKK
HKG Hong Kong +08.0

Tokyo

TYO
ADL Adelaide +09.5 Darwin

Sydney

SYD
NOU Noumea +11.0 Port Vila
WLG Wellington +12.0 Christchurch, Nadi, Nauru Island

*Based on data as of December 2004.

GMT

–09.0 Nome

+00.0 Dublin, Lisbon, Casablanca, Dakar, Abidjan

+02.0

+06.5
+07.0 Jakarta, Phnom Penh, Hanoi, Vientiane

+09.0 Seoul, Pyongyang
+10.0 Melbourne, Guam, Rabaul

Other major cities in same time zone

San Francisco, Las Vegas, Vancouver, Seattle/Tacoma,
Dawson City

Houston, Dallas/Fort Worth, New Orleans,
Mexico City, Winnipeg

Montreal, Detroit, Miami, Boston, Panama City,
Havana, Lima, Bogota

Milan, Rome, Madrid, Amsterdam, Algiers, Berlin,
Hamburg, Frankfurt, Vienna, Stockholm

Athens, Helsinki, Istanbul, Beirut, Damascus,
Cape Town

Singapore, Kuala Lumpur, Beijing, Taipei, Manila,
Perth, Ulaanbaatar

— 5 —

3. DRAWINGS: MODULE QW-2957
3-1. LCD DIAGRAM

L3L4L5L6L7L8L9

L10

L11

L12

L13

L14

L15

L16

L17

L18

L19

LC1

LC2

LC3

LC4

LC5

A0

P0

DST0

REP

e5

X0

X16

Y4

Y3

Y2

AUTO

Y1

Y0

U9U8U7U6U0 U5U4U3U2U1

c2

b2

SEC

f1a1b1

e1

d1

g1

c1

PER

f0a0b0

g0

e0

d0

SNZ1

c0

ALM0

SIG

MIN

f2

e2

f6a6b6

g6

e6

d6

a2

g2

d2

c6

a3

f3

b3

g3

e3

c3

d3

COL1

f7a7b7

g7

c8

HYP

c7

e7

d7

e4

a4

f4

b4

g4

c4

d4

COL0

a5

f5

b5

g5

c5

d5

P1

DST1

A1

f9a9b9

e9

d9

f8a8b8

g9

g8

c9

e8

d8

SEG.

L 3
L 4
L 5
L 6
L 7
L 8

L 9
L10
L11
L12
L13
L14
L15
L16
L17
L18
L19
L20
L21
L22
L23
L24
L25
L26
L27

COM.

X0Y0
X1Y0
X2Y0
X3Y0
X4Y0
X5Y0
X6Y0
X7Y0
X8Y0

X9Y0
X10Y0
X11Y0
X12Y0
X13Y0
X14Y0
X15Y0
X16Y0

X0Y1

X10Y1
X11Y1
X12Y1
X13Y1
X14Y1
X15Y1
X16Y1

L51

L52

L50

L49

L48

L47

L46

L45

L44

L43

X10Y2 X10Y3 X10Y4

U7

L42

L41

L40

L39

LC5LC1 LC2 LC3 LC4

X0Y4X0Y3X0Y2
X1Y4X1Y3X1Y2X1Y1
X2Y4X2Y3X2Y2X2Y1
X3Y4X3Y3X3Y2X3Y1
X4Y4X4Y3X4Y2X4Y1
X5Y4X5Y3X5Y2X5Y1
X6Y4X6Y3X6Y2X6Y1
X7Y4X7Y3X7Y2X7Y1
X8Y4X8Y3X8Y2X8Y1
X9Y4X9Y3X9Y2X9Y1

X11Y4X11Y3X11Y2
X12Y4X12Y3X12Y2
X13Y4X13Y3X13Y2
X14Y4X14Y3X14Y2
X15Y4X15Y3X15Y2
X16Y4X16Y3X16Y2

U9 U8

SEG.

L28
L29
L30
L31
L32
L33
L34
L35
L36
L37
L38
L39
L40
L41
L42
L43
L44
L45
L46
L47
L48
L49
L50
L51
L52

L38

COM.

L37

L36

L35

L34

L33

L32

U4

b6
g6

f6

b7 c7
g7 d7

f7 e7

HYP

b8
g8

f8 e8
b9 c9
g9 d9

f9 e9

L31

L30

L29

L28

L27

U3
U5

U2
U6

c6
d6
e6

SNZ1

a0

SIG

ALM0

f0
b1
a1

f1

SEC

b2
a2

f2
b3
a3

COL1

c8
d8

f3

MIN COL0

b4
a4

f4
b5
a5

DST0

A1P1 A0 REPP0

LC5LC1 LC2 LC3 LC4

U1 U0

a6

a7
b0
g0

c0

d0
e0
c1
g1
e1

d1

PERAUTO
c2
g2

d2
e2
c3
g3

d3
e3

c4
g4
e4
c5
g5

f5

a8

d4

DST1

a9

d5

e5

— 6 —

3-2. CIRCUIT DIAGRAM

LCD (4.5V 1/3b 1/5d)

AC
T1

T2

S1

KI1

KI2

S2

KI3

S4

KI4

S3

✽1
✽1

KS

SK

✽3
✽3
✽3
✽3

Xtal

CT

KI5
KI6
KI7

SA

KI8

KI9

N1
N2
N3
N4
XTB

XT
LD1

L1 L2

✽4✽4

✽1

✽2
✽2

✽2
✽2
✽2
✽2

C6

L3 - - - - - - L52 LC1 - - - LC5

LSI

TOTAL 93PINS

BONDING 87PINS

GND VDD2

BAT

BD

PZ

Z

Tr1

VDD1

C1

LL1

SDI SCK

✽4

VCHVDD3 VC1 VC2

C2 C4

C3

SDO

VOSC

CSB

✽4✽4✽4

KC1

LD2KC2

✽5

LD3KC3

KC4

C5

✽1

✽1

✽1

✽1

✽1

✽1

GND

BACK

EL

FRONT

LL2

L–
VOUT

L+

IC

✽ 1. GND-KI6: Short (Soldering)
GND-KI7: Short (Soldering)
KC2-KI2: Open (No Soldering)
KC3-KI2: Open (No Soldering)
KC4-KI2: Open (No Soldering)
KC2-KI9: Open (No Soldering)
KC3-KI9: Open (No Soldering)
KC4-KI9: Open (No Soldering)

✽ 2. Latch Type Key
✽ 3. Short (Soldering) (N trimming)

CLF2
CLF1

✽5

E'

Cel

V+

R1

LED

Tr2

✽ 4. No bonding
✽ 5. If the circuit is wired as same as the LED drive circuit as shown

in dash line, LD3KC3 (Normal Low) pin is used as the LD pin.
Therefore, LD3KD3 pin is not specified as a soldering pad.
Also, all the parts shown in dash line are not mounted if LED is
not mounted.

✽ 6. Normal High
✽ 7. KC3 is used in this module.
✽ 8. KC2 is used in this module.

— 7 —

3-3. CHECKING TERMINALS AND COMPONENTS

VOUT

GND

VDD3

L–

VDD1

KI3

L+

CLF1

CLF2

VC1

KI5

LD3KC3

KI9

KI9

KI9

AC

T2

VC2

BD

LD3KC3

KI8

KC1

KC1

KI2

T1

VOSCVCH

LD1

GND

GND

12. PCB ASS'Y
(76409012)

KI6

KI6

KI7

KI7

KI8

R1

LED1

GND

VDD2

Short pad for N trimming

KI4

XTB

XT

LD2KC2

KI2

KI2

LD3KC3

KI9

LD2KC2

KI2

KC4

KI9

KC4

KC4

LD2KC2

GND

N1

N1

GND

N2

N2

GND

N3

N3

GND

N4

N4

KI1

Short pad for switching modules

CUSHION 6
(72110064)

OSCILLATOR/CRYSTAL
(71101263)

CAPACITOR/TRIMMER
(10097666)

VCH

VOSC

CUSHION 506
(72119631)

KI4

VCH

GND

GND

GND VOSC

KI1

GND

VDD3

GND

VDD1

XT

B

X

T

XT

KI2

D

GN

GND

LL1

LL1

1

L

VDD2

L

LL1

BD

GND

GND

VDD2

LD3KC3

VDD2

R1

KI8

L–

CUSHION 506

L+

VDD2

LD1

GND

VC1

VC2

KI9

KC1

GND

LED1

LD3KC3

AC

KC1 KI9

(72119631)

KI3

VOUT

GND

VDD2

CLF1CLF2

VC1

KI5

SENSOR/TILT
(71055275)

— 8 —

4. EXPLODED VIEW: MODULE QW-2957

5 (10097687)

10a (10193878)
10b (10193879)

9 (10201006)

16 (10201009)

2 (72360283)

8 (10201005)

6 (10201012)

17 (10208889)

12 (76409012)

PCB ass'y

15 (72019599)

Battery/Lithium
(CR2016)

14 (72330952)

7 (10076070)

— 9 —

5. PARTS LIST: MODULE QW-2957

-

p

y

Note: 1. Prices and specifications are subject to change without prior notice.

2. Spare parts are classified as follows according to their importance in after-sales service.
A Rank ---------------------------------------- Very Important
B Rank ---------------------------------------- Important
C Rank ---------------------------------------

3. Batteries in Bulk pack on the tray will be supplied from our Overseas Spare Parts Section under charge basis.

Batteries in Blister pack will be supplied from our Sales Department.

4. As for order/supply of spare parts, refer to the separate publication "GUIDE BOOK for spare parts supply".

Less important

Item Code No. Parts Name S

76408949 MODULE/WITHOUT MOVEMENT QW-2957AT-01TK G-7600-1V/2V 1 A
76408950 MODULE/WITHOUT MOVEMENT QW-2957AT-02TK G-7600-9V 1 A

1 10097666 CAPACITOR/TRIMMER CTZ2E-25C-W2-P QW-2957 Common 1 B
2 72360283 CONTACT/BATTERY(-) 1828 Q359948B-1 QW-2957 Common 1 C
3 72110064 CUSHION 6 Q4914-1 QW-2957 Common 1 C
4 72119631 CUSHION 506 Q49364-1 (QW-506C01) QW-2957 Common 2 C
5 10097687 CUSHION 2549 Q470646-1 QW-2957 Common 1 C
6 10201012 EL YEL-2957-A-01 QW-2957 Common 1 A
7 10076070 HOLDER/BATTERY 2709 Q255451-1 QW-2957 Common 1 C
8 10201005 INTERCONNECTOR/ 2957-1 RJQ525786-001V01 QW-2957 Common 1 C

9 10201006 INTERCONNECTOR/ 2957-2 RJQ525787-001V01 QW-2957 Common 1 C
10a 10193878 LCD C2957-01THP QW-2957AT-01TK 1 A
10b 10193879 LCD C2957-02THP QW-2957AT-02TK 1 A

11 71101263 OSCILLATOR/CRYSTAL DT-26S07 QW-2957 Common 1 B
12 76409012 PCB ASS'Y RJQ526298*001V01TK QW-2957 Common 1 A
13 71055275 SENSOR/TILT TS-2418-P QW-2957 Common 1 B
14 72330952 SHEET/INSULATION 1028 Q434476-1 QW-2957 Common 1 C
15 72019599 SPRING/COIL 967-1 Q430081-1 QW-2957 Common 1 B
16 10201009 SPRING/COIL 2957-1 RJQ525614-001V01 QW-2957 Common 2 B
17 10208889 TAPE/ADHESIVE RJQ528339-001V01 QW-2957 Common 1 C

For the prices and minimum order/suppl

quantities of the above parts, refer to the Parts Price List P.P.L.-621.

ecification Applicable Q R

G-7600R-3V/9V

Notes: Q - Used quantity

R - Rank

— 10 —

6. PRECAUTIONS FOR REPAIR: MODULE QW-2957
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 AC contact and the negative (–) side of the main plate with the metallic tweezers.
The contact should be made for about two seconds.

2. On removing of the module from the case, please insert the precision screw driver between the module

and the case pointed by an arrows.

Metallic tweezers

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 D button, press A and C buttons at the normal timekeeping mode.
Then all the segments are displayed and the LCD drive signals are changed to the static drive
signal of “32 Hz” so that you can check the accuracy with the quartz timer.

B) CANCELLATION OF THE “ACCURACY CHECKING MODE”

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.

— 11 —

A

C

B

D

L

QW-2957

Ver. 1 : Sep. 2005

Addition of the operation chart (page 2 to 5)
Correction of page 11

CASIO COMPUTER CO.,LTD.

Overseas Service Division

Shibuya-ku, Tokyo 151-8543, Japan

6-2, Hon-machi 1-Chome