Casio QW-2140 Troubleshooting guide

SERVICE MANUAL
& PARTS LIST
(WITHOUT PRICE)
QW-2140
MODULE NO.
R
REF. NO. S/M-709
SEP. 2000
FKT-300

CONTENTS
Page
1. SPECIFICATIONS: QW-2140..................................................................... 1
2. OPERATION CHART: QW-2140................................................................ 2
3. DRAWINGS: QW-2140
3-1. BLOCK DIAGRAMS......................................................................................6
3-2. CHECKING TERMINALS AND COMPONENT.............................................8
4. EXPLODED VIEW: QW-2140..................................................................... 9
5. PARTS LIST: QW-2140............................................................................. 10
6. PRECAUTIONS FOR REPAIR: QW-2140
6-1. AC (ALL CLEAR) AND REMOVING OF MODULE ..................................... 11
6-2. ACCURACY CHECKING .............................................................................11
6-3. IMPROVING SIGNAL RECEPTION.............................................................12

— 1 —
1. SPECIFICATIONS: QW-2140
Battery CR1620
Battery life Approx. 2 years
Current consumption 2.2 µA maximum
Alarm system Piezo plate on Back cover
Accuracy ±15 sec./month
Accuracy setting system Trimmer capacitor
Accuracy checking See page 11
Functions
Item Detail
•Electro-luminescent backlight
•Accuracy at normal temperature: ±20 seconds a month
(without auto or manual receipt of time calibration signal)
•Timekeeping Mode
Regular timekeeping: Hr, min, sec, pm, month, date, day
12/24-hour formats
Auto-calendar (pre-programmed to the year 2039)
•Time Calibration Signal Reception
Auto Receive (Three times per day at 2:00 AM, 4:00 AM, and 6:00 AM);
Manual Receive; Last date/time received display
•Time Calibration Signal
Station name: DCF77; Mainflingen, Germany; Frequency: 77.5 kHz;
Range: approximately 800 km
•Telememo Mode
Memory capacity: Up to 20 sets of data, each set including;
name (8 characters) and telephone number (12 digits)
Other: Auto sort, Remaining memory display
•World Time Mode: 29 time zones; Daylight saving time on/off
•Alarm Mode: Daily alarm, hourly time signal
•1/100 sec. stopwatch
Measuring capacity: 23:59'59.99"
Measuring modes: Elapsed time, split time, two finishes
•Day Countdown with 5 Memories

— 2 —
2. OPERATION CHART: QW-2140
•Button operations are indicated using the letters shown
in the illustration. •Each section of this manual provides you with the information you need to perform operations in each mode. Further details and technical information can be found in
the “REFERENCE”section.
ABOUT THIS MANUAL
•Press Cto change from mode to mode. After you perform an operation in any
mode, pressing Creturns to the Timekeeping Mode.
•In any mode, press Lto illuminate the display for about two seconds. World Time Mode
Telememo Mode
Timekeeping Mode
Day Counter Mode
▲
▲ ▲
▲
Stopwatch Mode
▲
Alarm Mode
▲
Press C.
GENERAL GUIDE
TIMEKEEPING
Use the Timekeeping Mode to set and view the current time and date. You can also
display the Last Signal and World Time screens.
•The Last Signal screen shows the time and date of the last successful time
calibration signal reception.
•The World Time screen shows the data you were viewing when you last exited the
World Time Mode.
Current Time Setting
Normally, you do not need to do anything to set the current time as long as you are
within an area in West Europe where the watch can pick up the time calibration signal.
You can also set the current time manually when you are outside the range of the
signal.
•Before using the watch after purchasing it, use the procedure under “Selecting Your
Home City Code”to specify your home city, and then use the procedure under “To
perform manual time calibration signal reception.”
•Note that after you set your Home City code, you must also turn on the watch’s time
calibration signal receiver if you want to enable auto time calibration. See “About
Auto Receive”for more information.
•See “Setting the Time and Date Manually”for information about manual settings.
▲
▲
▲
Last Signal Timekeeping World Time
Receive date
Receive time
Receive indicator
Day of week
Hour : Minutes
PM indicator Seconds
Month –Day
Press D.Hold down B.
Release
Current time in the
selected city code
City code
Timekeeping Mode time
Setting the Time and Date Manually
The times displayed in the Timekeeping Mode and World Time Mode are linked. Even
if you plan to use the watch without enabling auto time calibration, be sure to select a
Home City code (the city code whose time and date you are setting), before you set
the time and date.
To set the current time and date manually
1.In the Timekeeping Mode, hold downAuntil the
current Auto Receive On/Off setting starts to flash,
which indicates the setting screen.
2.Press Cto move the flashing in the sequence shown
below to select other settings.
12-hour format indicator
City code
Setting
Auto Receive
DST
12/24-Hour format
City Code
Seconds
Hour, Minutes,
Year, Month, Day
Button Operations
Press Dto toggle auto receive on and off.
Press Dto toggle between Daylight Saving TIme (ON) and
standard time (OFF).
Press Dto toggle between 12-hour (12H) and 24-hour (24H)
timekeeping.
Use D(+) and B(–) to change the setting.
Press Dto reset to 00.
Use D(+) and B(–) to change the setting.
Auto
Receive
Hour
12/24-Hour
Format City Code SecondsDST
Day Month Year Minutes
3. When the setting you want to change is flashing, use Band/or Dto change it as
described below.
To select your Home City code
1.In the Timekeeping Mode, hold down Auntil the
currentAuto Receive On/Off setting starts to flash,
which indicates the setting screen.
2.Press Cthree times to move the flashing to the City
Code setting.
3. Use D(+) and B(–) to change it.
4.Press Ato exit the setting screen.
•Auto Receive setting is used for time calibration signal reception only. See “About
Auto Receive”for details.
•See “CITY CODE TABLE”at the back of this manual for a complete list of
available codes.
•Daylight Saving Time (DST) advances the time setting by one hour from Standard
Time. Remember that no all countries or even local areas use Daylight Saving
Time.
4. Press Ato exit the setting screen.
Selecting Your Home City Code
You can select a city code for your Home City (the city where you normally use the
watch). This data can be changed any time you move to another geographic area.
•See “CITY CODE TABLE”at the back of this manual for a complete list of available
codes.
City code
Time Calibration Signal Reception
This watch is designed to pick up a time calibration signal transmitted from
Mainflingen, Germany and update its time setting in accordance with the signal. There
are two different methods you can use to receive the signal: Auto Receive and
Manual Receive. With Auto Receive, the watch automatically receives the calibration
signal three times each day and makes appropriate adjustments. With Manual
Receive, you perform a specific button operation to receive the calibration signal.
Note
•If you are using the time calibration signal to set the time for this watch, be sure to
correctly set your home city. Otherwise, there is the chance that the watch will not
set the correct time. See the “To select your Home City code”for details.
•This watch automatically switches between DST and standard time while BER is
selected as the home city code. For any other home city code, you must perform the
procedure under “To set the current time and date manually”to switch between DST
and standard time.
•Time calibration reception is limited to specific geographic areas in West Europe.
•The current time setting in accordance with the time calibration signal takes priority
over any time settings you make.
•The watch is designed to automatically update the date and day of the week for the
period January 1, 2000 to December 31, 2039. Setting of the date by the time
calibration signal cannot be performed starting from January 1, 2040.
•This watch can receive signals that differentiate between leap years and non-leap years.
•Auto Receive is turned on when the watch is shipped from the factory.
•See the information under “Time Calibration Signal Reception Precautions”if you
experience problems with time calibration signal reception.

—3 —
To perform manual time calibration signal reception
1.Place the watch on a stable surface to its top (12
o’clock side) is facing in the general direction of
Frankfurt, Germany.
•This puts the watch in the optimum position for time
calibration signal reception.
2.In the Timekeeping Mode, hold down Dfor about two
seconds, until the watch beeps.
•At this time, the indicator on the watch’s display
should scroll from left to right, which indicates that
signal reception has started.
•Time calibration signal reception takes from four to 11
minutes. Take care that you do not move the watch
during this time.
•After signal reception is complete, the display of the
watch changes to the Last Signal screen, which
shows the new signal receive date and time.
Note
•To interrupt a receive operation and return to the Timekeeping screen, press D.
•If the receive operation is unsuccessful, the message “ERR”appears on the Last
Signal screen for about one or two minutes. After that, the watch returns to the
Timekeeping screen.
•You can also change from the Last Signal screen to the Timekeeping screen by
pressing D.
About the Receive Indicator
The receive indicator shows the strength of the calibration signal being received. For
best reception, be sure to keep the watch in a location where signal strength is
strongest.
•Even in an area where signal strength is strong, it takes about 10 seconds for signal
reception to stabilize enough for the receive indicator to indicate signal strength.
•Use the receive indicator as a guide for checking signal strength and for finding the
best location for the watch during signal receive operations.
•The receive indicator remains on the display in all modes following reception of the
time calibration signal and calibration of the watch’s time setting. The receive
indicator does not appear if signal reception was unsuccessful or after manual
adjustment of the current time setting.
About Auto Receive
When auto receive is turned on, the watch automatically starts to receive the time
calibration signal when the digital time in the Timekeeping Mode reaches 2:00AM,
4:00 AM, and 6:00AM each day (calibration times).
Note
•TheAuto Receive operation is performed only if the watch is in the Timekeeping
Mode or World Time Mode when one of the calibration times is reached. It is not
performed if the calibration time is reached while you are making settings (while
settings are flashing on the display).
•Auto receipt of the calibration signal is designed to be performed early in the
morning, while you sleep (provided that the digital time is set correctly). Before going
to bed for the night, remove the watch from your wrist, and put it in a location where
it can easily receive the signal.
•The receive indicator ( ) indicates that one, two, or all three of the last calibration
time reception attempts were successful.
•When auto receive is turned on, the watch receives the calibration signal for four to
11 minutes each day when the digital time reaches 2:00 AM, 4:00AM, and 6:00 AM.
Do not operate any of the watch’s buttons within 15 minutes prior to or following the
calibration times. Doing so can interfere with correct calibration.
•Remember that reception of the calibration signal depends on the time shown on the
digital display. The receive operation will be performed whenever the digital display
shows 2:00 AM, 4:00AM, and 6:00 AM, regardless of whether or not the displayed
time is actually the correct time.
•When two or three receptions are successful, the watch uses the data of the last
reception for calibration. When only one reception is successful, the watch uses the
data of the successful reception.
Weak Strong
Current time
Receive indicator
To turn auto receive on and off
1.In the Timekeeping Mode, hold down Auntil the
current Auto Receive On/Off setting starts to flash,
which indicates the setting screen.
2.Press Dto toggle Auto Receive on (ON) and off (OFF).
3.Press Ato exit the setting screen.
ALARMS
You can set three independent DailyAlarms, and even
input text that appears on the display to remind you of the
purpose of each alarm. When an alarm is turned on, the
alarm tone sounds 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.
•The remaining time shows the amount of time from the
current time (Timekeeping Mode time) until the alarm
time whose screen is on the display.
•The alarm number (“AL1”though “AL3”) indicates an
alarm screen. “SIG”appears in place of the alarm
number when the Hourly Time Signal screen is shown.
•All of the operations in this section are performed in the
Alarm Mode, which you enter by pressing C.
Alarm number
Alarm time
Text
Remaining time (Hours :
Minutes Seconds)
To set an alarm
1.In the Alarm Mode, useBand Dto select the alarm
whose time you want to set.
2.Hold down Auntil the flashing cursor appears on the
display, which indicates the setting screen.
•This automatically turns on the alarm.
•Holding down Lfor about two seconds at this time
sets an alarm time of 12:00AM, without assigning any
text to the alarm.
3.Press Cto move the flashing in the sequence shown
below to select other settings.
HourText Minutes
•There are eight spaces in the text, so you have to press Ceight times to move to
the Hour setting.
Cursor
To view Alarm Mode screen
In the Alarm Mode, use Band Dto cycle through the alarm screens as shown
below.
•Displaying an alarm time shows any text assigned to it for about two seconds (or a
blank screen if no text is assigned), followed by the remaining time screen.
•Your watch comes preset with the text data “LUNCH”and an alarm time of 12:00PM
(noon) for alarm AL1. You can use this setting as it is or change it to something else.
Press D.
Press B.
AL1 AL2 AL3 SIG
To test the alarm
In the Alarm Mode, hold down Dto sound the alarm.
To turn an alarm and the Hourly Time Signal on and off
1. In the Alarm Mode, use Band Dto select an alarm or the Hourly Time Signal.
2. When the alarm or the Hourly Time Signal you want to is selected, press Ato turn
it on and off.
Note
•The on/off status of an alarm is indicated on the corresponding alarm screen (AL1
through AL3). The symbol indicates an alarm is turned on, while absence of the
symbol indicates the alarm is turned off.
•The on/off status of the Hourly Time Signal is indicated on the SIG screen. The
symbol along with the message “ON”indicates the Hourly Time Signal is turned
on, while the message “OFF”without the symbol indicates it is turned off.
•The alarm on indicator and the Hourly Time Signal on indicator are shown on the
display in all modes while these functions are turned on.
•If any alarm is on, the alarm on indicator is shown on the display in all modes.
4. When the setting you want to change is selected, use Band Dto change it.
•Selecting the text causes the text input cursor to appear.
•When inputting text, use Band Dto cycle through characters at the current
cursor location, and Cto move the cursor to the right. See “Inputting Text”.
•While the hour or minute setting is flashing, use D(+) and B(–) to change it.
•When setting the alarm time using the 12-hour format, take care to set the time
correctly as a.m. (no indicator) or p.m. (Pindicator).
5. Press Ato exit the setting screen.
Note
•Use the above procedure to edit alarm settings, too.
Alarm Operation
The alarm sounds at the preset time for about 20 seconds, or until you stop it by
pressing any button.
•Alarms and the Hourly Time Signal sound in all modes. To view text assigned to
alarms and the remaining time, however, you must enter the Alarm Mode.
To recall Day Counter records
Whenever you enter the Day Counter Mode, the Day Counter Number screen
appears for about two seconds, followed by the corresponding Target Date screen.
•In the Day Counter Mode, use Band Dto cycle through the Day Counter number
screens as shown below.
▲
Day counter number
Day Counter Number Target Date
Target year
Target
Month –Day
Day counter
Text
DAY COUNTER
The Day Counter lets you count the number of days from the Timekeeping Mode’s
current date to a specific target date.
•There are five Day Counter records, each of which can be set with its own text and
target date (year, month, day).
•All of the operations in this section are performed in the Day Counter Mode, which
you enter by pressing C.

—4 —
To make Day Counter record settings
1.In the Day Counter Mode, use Band Dto scroll
through the Day Counter Number screens until the one
you want is on the display.
2.Hold down Auntil the flashing cursor appears on the
display, which indicates the setting screen.
•Holding down Lfor about two seconds at this time
clears the text (if there is any already input) and sets
the currentTimekeeping Mode date as the target
date.
3.Press Cto move the flashing in the sequence shown
below to select other settings.
Month
Year Day
Text
•There are eight spaces in the text, so you have to press Ceight times to move to
the Year setting.
•When the Year setting is selected, the cursor changes for a four-digit target year.
Though the setting screen shows four digits, other screens show only the last
(rightmost) two digits.
4. When the setting you want to change is selected, use Band Dto change it.
•Selecting the text causes the text input cursor to appear.
•When inputting text, use Band Dto cycle through characters at the current
cursor location, and Cto move the cursor to the right. See “Inputting Text”.
•While the year, month, or day setting is flashing, use D(+) and B(–) to change
the setting.
•You can set a target date in the range of January 1, 1940 to December 31, 2039.
5. Press Ato exit the setting screen.
Note
•Use the above procedure to edit Day Counter records, too.
Cursor
•A Day Counter Number screen remains on the display for about two seconds, after
which it is replaced by the corresponding Target Date screen. Pressing Awhile a
Target Date screen is on the display switches to the corresponding Day Counter
Number screen for about two seconds.
•The day counter value has a plus sign (+) in front of it when the corresponding target
date comes after the current date, or a minus sign (–) in front of it when the target
date comes before the current date.
•Your watch comes preset with the following Day Counter text settings. You can use
these as they are or change them to something else, if you want.
DC1: 21C (21ST century)
DC2: PAYDAY
DC3: BIRTHDAY
Press D.
Press B.
DC1 DC3 DC4 DC5DC2
Current time in the
selected city code
City code
Timekeeping Mode time
WORLD TIME
World Time shows the current time in 28 cities (29 time
zones) around the world.
•For full information on city codes, see the “CITY CODE
TABLE”at the back of this manual.
•All of the operations in this section are performed in the
WorldTime Mode, which you enter by pressing C.
To view the time in another city code
While in the World Time Mode, press Dto scroll forward
through the city codes (time zones) and Bto scroll back.
•If the current time shown for a city is wrong, check your
Timekeeping Mode time and Home City settings and
make the necessary changes.
TELEMEMO
Telememo lets you store up to 20 records, each
containing name and telephone number data. Records
are automatically sorted based on the characters of the
name. You can recall records by scrolling through them on
the display.
•See “CHARACTER LIST”at the back of this manual for
details on how the watch sorts records.
•Your watch comes preset with three Telememo records
with the names “FAMILY,”“HOME,”and “OFFICE,”
without any phone numbers. You can change or delete
these records if you want.
•All of the operations in this section are performed in the
Telememo Mode, which you enter by pressing C.
Telephone number
Name
Memory number
To toggle a city code time between standard time and Daylight Saving Time
1.In the World Time Mode, use Band Dto display the
city code (time zone) whose standard time/Daylight
Saving Time setting you want to change.
2.Hold down Afor about two seconds 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.
•Daylight Saving Time (DST) advances the time setting by one hour from Standard
Time. Remember that the not all countries or even local areas use Daylight
Saving Time.
4.After you input the name, press Cas many times as
necessary to display the number input screen.
•You can input up to eight characters for the name.
When the cursor is located at the eighth space of the
name, moving the cursor to the right causes it to jump
to the first digit of the number. When the cursor is at
the 12th digit of the number, moving it to the right (by
pressing C) causes it to jump to the first character in
the name.
5. Input a telephone number.
•Use Band Dto change the character (hyphen, number, or space) at the cursor
position. The character changes in the following sequence.
6. When the character you want is at the cursor position, press Cto move the cursor
to the right.
7. Repeat steps 5 and 6 until you complete number input.
•You can input up to 12 digits for the number.
•The number initially contains all hyphens. You can leave the hyphens or replace
them with numbers or spaces.
8. Press Ato store your data and return to the Telememo record screen (without the
cursor).
•When you press A, the message “SORT”appears on the display for a few
seconds. After the sort operation is complete, the watch returns to theTelememo
record screen (without the cursor).
To recall Telememo records
In the Telememo Mode, use D(+) and B(–) to scroll through Telememo records on
the display.
•Only the memory number and name of each Telememo record appear on the
display as you scroll through Telememo records. If you leave the memory number/
name screen on the display for about two seconds, it changes to the phone number
screen.
•Pressing Awhile the phone number screen is on the display switches to the
memory number/name screen for about two seconds.
To edit a Telememo record
1. In the Telememo Mode, scroll through the records and display the one you want to
edit.
2. Hold down Auntil the flashing cursor appears on the display.
3. Use Cto move the flashing to the character you want to change.
4. Use Band Dto change the character.
5. After making the changes that you want, press Ato store them and return to the
Telememo record screen.
To delete a Telememo record
1. In the Telememo Mode, scroll through the records and display the one you want to
delete.
2. Hold down Auntil the flashing cursor appears on the display.
3. Hold down Luntil the message “CLEAR”appears on the display.
•At this time the cursor appears on the display, ready for input.
4. Input data or press Ato return to the Telememo record screen.
To create a new Telememo record
1.In the Telememo Mode, press Bor Duntil a record
showing the name “NEW”(indicating the new record
input screen) appears.
•If the message “FULL”appears on the display, 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 Auntil the flashing cursor ( ) appears on the display, which indicates
the setting screen.
3. Input a name.
•When inputting the name, use Band Dto cycle through characters at the
current cursor location, and Cto move the cursor to the right. See “Inputting
Text”.
•You can input up to eight characters for the name.
0 to 9
–
(space)
Press D.
Press B.
D
Start Stop
Elapsed Time
➤Re-start Clear
D ➤Stop D ➤ D ➤ A
Split Time
D
Start Split
➤Split release Clear
A ➤Stop A ➤ D ➤
A
Two Finishes
D
Start Split
➤Stop Clear
A ➤Split release
D
➤
A ➤ A
First runner
finishes. Second runner
finishes.
Record time of
first runner.
Record time of
second runner.
STOPWATCH
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.
•All of the operations in this section are performed in the
Stopwatch Mode, which you enter by pressing C.
To measure times with the stopwatch
Hours
1/100 second
Minutes
Seconds

—5 —
Initial Screens
When you enter theAlarm, Day Counter, World Time or Telememo Mode, the data you
were viewing when you last exited the mode appears first.
Inputting Text
The following describes how to input text in theAlarm, Day Counter, and Telememo
Modes.
To input characters
1.When the cursor is on the display, use Band Dto
cycle through the available letters, numbers and
symbols, in the sequence shown below.
Cursor
:/.–
(space)
0 to 9
A
to Z
Press D.Press B.
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.
Auto Return Features
•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 saves anything
you have input up to that point and exits the setting screen.
•If you leave the watch in Alarm, Day Counter, or Telememo Mode for about two
minutes without performing any operation, it automatically changes to the
Timekeeping Mode.
Data and Setting Scrolling
The Band Dbuttons 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 through the data at high speed.
2. When the character you want is at the cursor position, press Cto move the cursor
to the right.
3. Repeat steps 1 and 2 to input the rest of the characters you want.
Display Text
Though you can input up to eight characters forAlarm text, Day Counter text and the
Telememo name, only six characters can appear on the display at one time. Because
of this, display screens switch alternately between the first six characters and the
remaining two characters.
Timekeeping
•Pressing Dwhile setting the current time in theTimekeeping Mode resets the
seconds count to zero. Pressing Dwhile seconds count is in the range of 30 to 59
resets the seconds to 00 and adds 1 to the minutes. In the range of 00 to 29, the
minutes count is unchanged.
•The day of the week is automatically displayed in accordance with the date (year,
month, and day) settings.
•The year can be set in the range of 2000 to 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 you have the watch’s battery replaced.
12-hour/24-hour Timekeeping Formats
The 12-hour/24-hour timekeeping format you select in theTimekeeping Mode is also
applied in all other modes.
•With the 12-hour format, the P(PM) indicator appears to the left of the hour digits for
times in the range of noon to 11:59 p.m. and the no indicator appears to the left of
the hour digits 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, with 24
indicator.
Time Calibration Signal Reception Precautions
•This watch is able to receive the time calibration signal
transmitted from Mainflingen, Germany (located 25
kilometers southeast of Frankfurt). Signal reception is
possible within the area represented by a circle with a
radius of about 800 kilometers.
•Even when the watch is within the reception range,
signal reception is impossible if the signal is blocked by
mountains or other geological formations between the
watch and signal source.
•Signal reception is affected by weather, atmospheric conditions, and seasonal changes.
•At long distances that are out of the line of sight of the signal transmitter, the signal
is bounced off of the ionosphere. Because of this, such factors as changes in the
reflectivity of the ionosphere, as well as movement of the ionosphere to higher
altitudes due to seasonal atmospheric changes or the time of day may change the
reception range of the signal and make reception temporarily impossible.
•This watch is designed to receive the signal transmitted from Mainflingen. This
means that reception is best when the antenna built into the 12 o’clock edge of the
watch is facing towards Mainflingen. Note, however, that moving the watch while the
time calibration signal receive operation is taking place will make stable reception
impossible.
•Think of the watch as acting like a TV or radio when it is receiving the calibration
signal. When receiving indoors, move to a location as near as possible to a window.
Proper signal reception can be difficult or even impossible under the conditions
listed below.
Near TVs, refrigerators, computers, or other household appliances
Far away from broadcasting stations among ferro-concrete structures or near
mountains
Underground, in tunnels or in ferro-concrete buildings
Near high-tension wires, neon signs, or radio stations with interfering frequencies
Near railroads, highways or airports
In trains or cars
Frankfurt
•Radio interference can make signal reception impossible.
•Strong electrostatic charge can result in the wrong time being set.
•The daily alarm and hourly time signal do not operate during signal reception.
•If you are in an area where proper time calibration signal reception is impossible, the
watch keeps time within ±15 seconds a month at normal temperature.
World Time
•The current time in all World Time Mode cities is calculated in accordance with the
Greenwich Mean Time (GMT) differential for each city, based on the current Home
City time setting in the Timekeeping Mode.
•GMT differential is calculated by this watch based on Universal Time Coordinated
(UTC) data.
Backlight Precautions
•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.
•Based on data as of June 2000.
HONOLULU
ANCHORAGE
LOSANGELES
DENVER
CHICAGO
NEW YORK
CARACAS
RIO DE JANEIRO
LONDON
BERLIN
PARIS
CAIRO
JERUSALEM
JEDDAH
TEHRAN
DUBAI
KABUL
KARACHI
DELHI
DHAKA
YANGON
BANGKOK
HONG KONG
TOKYO
ADELAIDE
SYDNEY
NOUMEA
WELLINGTON
City City GMT Other major cities in same time zone
Code
Differential
CITY CODE TABLE
–––
HNL
ANC
LAX
DEN
CHI
NYC
CCS
RIO
–––
–––
GMT
LON
BER
PAR
CAI
JRS
JED
THR
DXB
KBL
KHI
DEL
DAC
RGN
BKK
HKG
TYO
ADL
SYD
NOU
WLG
–11
–10
–9
–8
–7
–6
–5
–4
–3
–2
–1
+00
+01
+02
+03
+3.5
+04
+4.5
+05
+5.5
+06
+6.5
+07
+08
+09
+9.5
+10
+11
+12
PAGO PAGO
PAPEETE
NOME
SAN FRANCISCO, LAS VEGAS, VANCOUVER,
SEATTLE, DAWSON CITY
ELPASO, EDMONTON
HOUSTON, DALLAS/FORT WORTH, NEW
ORLEANS, MEXICO CITY, WINNIPEG
MONTREAL, DETROIT, MIAMI, BOSTON, PANAMA
CITY, HAVANA, LIMA, BOGOTA
LAPAZ, SANTIAGO, PORT OF SPAIN
SAO PAULO, BUENOSAIRES, BRASILIA,
MONTEVIDEO
PRAIA
DUBLIN, LISBON, CASABLANCA, DAKAR,
ABIDJAN
MILAN, ROME, MADRID,AMSTERDAM, ALGIERS,
HAMBURG, FRANKFURT, VIENNA, STOCKHOLM
ATHENS, HELSINKI, ISTANBUL, BEIRUT,
DAMASCUS, CAPE TOWN
KUWAIT, RIYADH, ADEN, ADDIS ABABA, NAIROBI,
MOSCOW
SHIRAZ
ABU DHABI, MUSCAT
MALE
MUMBAI, CALCUTTA
COLOMBO
JAKARTA, PHNOM PENH, HANOI, VIENTIANE
SINGAPORE, KUALA LUMPUR, BEIJING, TAIPEI,
MANILA, PERTH, ULAANBAATAR
SEOUL, PYONGYANG
DARWIN
MELBOURNE, GUAM, RABAUL
PORT VILA
CHRISTCHURCH, NADI, NAURU ISLAND
RECEIVE NOTE
Resin Band Metal Band
Pass through band loop.
Improving Signal Reception
Removing the watch from your wrist and positioning it as shown in the illustrations
nearby helps to improve signal reception.
•If your watch has a resin band, pass the end of the band through the band loop and
place the watch on a stable surface.
Alarm Precautions
The alarm does not sound while signal reception is in progress. This means that an alarm
time that falls within one of the auto receive periods (2:01 to 2:15 a.m., 4:01 to 4:15 a.m.,
6:01 to 6:15 a.m.) may fail to sound if a receive operation is being performed at that time.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
(space)
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
0
1
2
3
4
5
6
7
8
9
–
.
/
:
CHARACTER LIST

—6 —
3. DRAWINGS: QW-2140
3-1. BLOCK DIAGRAMS
LC4
L45
L44
L43
L42
L41
L40
L39
L38
L37
L36
L35
L34
L33
LC1
KC4
L46
L47
L48
L49
L50
L51
L52
L53
L54
L55
L56
L57
L60
LC3
LC2
L32
L17
L18
L19
L20
L21
L22
L23
L24
L25
L26
L27
L28
L29
L30
L31
L16
L15
L14
L13
L12
L11
L10
L9
L8
L7
L6
L5
L4
LC5
KC3
L3
L58
L59
Y0
Y4
X35
X0
col1
PM1 24H
DST
SIGALM
Y0
Y4 ANT0
X47
X36 X39 X40 X43 X44
z3 z1
z2 z0
w0 w1 w2
PM0
b3
c3
adeg3
a0 b0
g0
f0
c0
e0
d0
a1 b1
g1
f1
c1
e1
d1
a2 b2
g2
f2
c2
e2
d2
hyp
col0
w3
w4
w5
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
L28
L29
L30
L31
LC1
X14Y2
X13Y2
X12Y2
X11Y2
X10Y2
X9Y2
X8Y2
X7Y2
X6Y2
X5Y2
X4Y2
X3Y2
X2Y2
X1Y2
X0Y2
b0
g0
b1
g1
e1
b2
g2
e2
X41Y2
X40Y2
z2
X39Y2
X38Y2
X37Y2
LC1
X36Y2
X47Y2
X46Y2
X45Y2
X44Y2
z0
X43Y2
X42Y2
X35Y2
X34Y2
X33Y2
X32Y2
X31Y2
X30Y2
X29Y2
X28Y2
X27Y2
X26Y2
X25Y2
X24Y2
X23Y2
X22Y2
X21Y2
X20Y2
X19Y2
X18Y2
X17Y2
X16Y2
X15Y2
LC2
X14Y1
X13Y1
X12Y1
X11Y1
X10Y1
X9Y1
X8Y1
X7Y1
X6Y1
X5Y1
X4Y1
X3Y1
X2Y1
X1Y1
X0Y1
a0
f0
a1
f1
col0
a2
f2
c3
X41Y3
X40Y3
X39Y3
X38Y3
X37Y3
LC2
X36Y3
X47Y3
X46Y3
X45Y3
X44Y3
X43Y3
X42Y3
X35Y1
X34Y1
X33Y1
X32Y1
X31Y1
X30Y1
X29Y1
X28Y1
X27Y1
X26Y1
X25Y1
X24Y1
X23Y1
X22Y1
X21Y1
X20Y1
X19Y1
X18Y1
X17Y1
X16Y1
X15Y1
LC3
X14Y0
X13Y0
X12Y0
X11Y0
X10Y0
X9Y0
X8Y0
X7Y0
X6Y0
X5Y0
X4Y0
X3Y0
X2Y0
X1Y0
X0Y0
w2
w1
w0
w5
hyp
w4
w3
b3
X41Y4
X40Y4
X39Y4
X38Y4
X37Y4
LC3
X36Y4
X47Y4
X46Y4
X45Y4
X44Y4
X43Y4
X42Y4
X35Y0
X34Y0
X33Y0
X32Y0
X31Y0
X30Y0
X29Y0
X28Y0
X27Y0
X26Y0
X25Y0
X24Y0
X23Y0
X22Y0
X21Y0
X20Y0
X19Y0
X18Y0
X17Y0
X16Y0
X15Y0
LC4
X14Y4
X13Y4
X12Y4
X11Y4
X10Y4
X9Y4
X8Y4
X7Y4
X6Y4
X5Y4
X4Y4
X3Y4
X2Y4
X1Y4
X0Y4
col1
24H
PM1
DST
ALM
SIG
PMO
X41Y0
X40Y0
X39Y0
X38Y0
X37Y0
LC4
X36Y0
X47Y0
X46Y0
X45Y0
X44Y0
X43Y0
X42Y0
X35Y4
X34Y4
X33Y4
X32Y4
X31Y4
X30Y4
X29Y4
X28Y4
X27Y4
X26Y4
X25Y4
X24Y4
X23Y4
X22Y4
X21Y4
X20Y4
X19Y4
X18Y4
X17Y4
X16Y4
X15Y4
LC5
X14Y3
X13Y3
X12Y3
X11Y3
X10Y3
X9Y3
X8Y3
X7Y3
X6Y3
X5Y3
X4Y3
X3Y3
X2Y3
X1Y3
X0Y3
c0
d0
e0
c1
d1
c2
d2
adeg3
X41Y1
X40Y1
z3
X39Y1
X38Y1
X37Y1
LC5
X36Y1
X47Y1
X46Y1
X45Y1
X44Y1
z1
X43Y1
X42Y1
X35Y3
X34Y3
X33Y3
X32Y3
X31Y3
X30Y3
X29Y3
X28Y3
X27Y3
X26Y3
X25Y3
X24Y3
X23Y3
X22Y3
X21Y3
X20Y3
X19Y3
X18Y3
X17Y3
X16Y3
X15Y3
L32
L33
L34
L35
L36
L37
L38
L39
L40
L41
L42
L43
L44
L45
L46
L47
L48
L49
L50
L51
L52
L53
L54
L55
L56
L57
L58
L59
L60
COM.
SEG. COM. SEG.
KC4 KC3 ANT0

— 7 —
PX1 PY1
Vref
PW1
PY3 PX3
PU1
PZ1
PH
LE
ADIN
A2OUT
PO
LC6LC5LC1L60L3L2L1 SDI CSB SDO SCK SCUT PT PTIN CRMS CRST CRIN
AC T1 T2 T3 T4 KI1 KI2 KI3 KI4 KI5 KI6 KI7 KI8 KI9 KC1 KC2 KC3 KC4 KC5 KC6 EMP XTB
Xtal1
Xtal2
Xtal3
FLA
DEC
INT
REC
Q1B Q1A
SB
GND
IN
VCC
10
9 8 7 6 5 4 3 2 1
11 12 13 14 15 16 17 18 19 20
FLB
C20
R4
R5
CLK SL Q2A Q2B PON D3
Cl1 Cl2 Cl3 Cl4
D2 D1 D0
R7
R2
SL S4
C15 C16
C21
C19
C10
F.A
C18 C17
S3 S1 S2
CT XT
VDD2A LD1
GND BD1 VC3 VC4 VCH VOSC VDD1 VC1 VC2
C1
C3C2C4C7C8C6
C5
C9
Tr1
LL1
EL
LL2
Di
PZZ
BAT
+
+
+
VANGNDA VDD2 VHF VDSP VDD3
BACKFRONT
INV
LCD
IC
ELD
GND
CIL
GND GND
VCPE VCCE ENB RT1 RT2
Rel
Cel
✽1
✽3
✽2
TOTAL BONDING
129PINS 103PINS
LSI
✽1. KC5 :Short (Soldering) ✽2. KC6 : Open (No soldering) ✽3. Short (Soldering)

— 8 —
Top view of P.C.B. ass'y Bottom view of P.C.B. ass'y
3-2. CHECKING TERMINALS AND COMPONENT
GND
VC4
GND GND
VDD1
GND
VC3
VDD3
GND
VHF
VDSP
VOSC
KI7KI5 KI8
GND
GND
KI6
GND
GND
GND
VCH
KI3
KI2
KC6
EMP
KI4 KI1
ELD
21
7
8
7
8
9
GND
GND 7
R6
R6 R6
R6
R9
R9
R8
R8
VC1 VC2
VDD2
GND
R6
8
GND
GND
VDD2 AC
12
LD1
VCH
KI8 KI7
ELD
KI3
KI1
KI2
VDD2
KC2
ELD
L
VC1
KI9
1
KI8 15 6 11
14 L1
7
4
KI6
12
5
GND
8
9
KI7
10
1
2
5
6
11
10
GND
12
12
L2
VDD2
CIL KC1
CIL
VCPE
VDD2
LD1
RT1
RT2 GND
GND
CIL
GND
ELD
RT1
RT2
VCPE GND
GND
L
BD1
VDD2
L
GND
L
1
VDD2
1
GND
4
GND KI4
15 14
KI5
KI5
KI6
GND
XT XT XTB
GND
VDD2
VOSC
GND
GND
GND
GND
VDD2
KC5
EMP
KI9
Resistor/
Chip
R7
Capacitor/Chip
C5
Capacitor/Chip
C1
Resistor/
Chip
R2
Resistor/Chip
R5
Diode
Di
Detection IC
IC
Resistor/Chip
R4
4. Capacitor/Trimmer
(7103 0458)
CT
Capacitor/Tantalum
C9
Capacitor/
Tantalum
C8
Capacitor/Chip
C6
Capacitor/
Chip
C4
Capacitor/Chip
C7
Capacitor/Chip
C3
Capacitor/Chip
C2
Varistor Capacitor/
Tantalum
C10
Resistor/
Chip
Rel
Capacitor/Chip
C14
Capacitor/Chip
C13
Capacitor/Chip
C12
Capacitor/Chip
C11
Capacitor/Chip
C15
Capacitor/Chip
C16
Capacitor/
Chip
C21
Inverter
INV 5. Oscillator/Crystal
(1003 0868)
Xtal1
Oscillator/Crystal
Xtal2
Oscillator/
Crystal
Xtal3
Transistor
Tr1
Coil
LL1
Coil
LL2
Capacitor/Chip
Cel
Capacitor/
Chip
C20
3.PCB ASS'Y
(7640 3837)
Z

— 9 —
4. EXPLODED VIEW: QW-2140
WAVE CEPTOR
CASIO
LIGHT
Battery/Lithium
(CR1620)
3 (7640 3837)
PCB ass'y
17 (7211 9045)
20 (1002 7269)
22 (7201 9599)
19 (7230 1012)
14 (1002 7248)
15 (7231 1863)
12 (1002 7237)
16 (7207 8776)
8 (1002 7247)
6 (7225 1792)
9 (1002 7236)
18 (1002 7255) 20 (1002 7269)
13 (1002 7256)
11 (7229 0790)
7 (7233 2719)
2 (1002 7258)
1a (1002 7257)
1b (1002 7274)
16 (7207 8776)
21 (1002 7270)
Note: Length of coil spring
20: Shorter
21: Longer
10 (1002 7268)

5. PARTS LIST: QW-2140
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 ----------------------------------------------
-
Less important
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".
Item Code No. Parts Name S
p
ecification A
pp
licable Q R
MODULE/WITHOUT MOVEMENT QW-2140YC-01 FKT-300-1V 1
MODULE/WITHOUT MOVEMENT QW-2140YC-03 FKT-300D-7V 1
< The module QW-2140 is "built-in t
yp
e" which is assembled directl
y
to the case,
therefore the module as the s
p
are
p
arts is not available. >
1a 1002 7257 LCD C2140-01P QW-2140YC-01 1 A
1b 1002 7274 LCD C2140-51PN QW-2140YC-03 1 A
2 1002 7258 EL NEL-2140-A-01 QW-2140YC-01/03 1 A
3 7640 3837 PCB ASS'Y Q254665*1TK QW-2140YC-01/03 1 A
4 7103 0458 CAPACITOR/TRIMMER TSF-2L2-120-4.2 QW-2140YC-01/03 1 B
5 1003 0868 OSCILLATOR/CRYSTAL C2-77.503KHZ-10/10 QW-2140YC-01/03 1 B
6 7225 1792 CONTACT/BATTERY (–) 563 Q36151A-1 QW-2140YC-01/03 1 C
7 7233 2719 CUSHION/1922-3 Q464274-1 QW-2140YC-01/03 1 C
8 1002 7247 HOLDER/BATTERY 2140 Q254643-1 QW-2140YC-01/03 1 C
9 1002 7236 HOUSING/2140 Q151839-1 QW-2140YC-01/03 1 C
10 1002 7268 INTERCONNECTOR/2140 Q466857-1 QW-2140YC-01/03 2 C
11 7229 0790 LABEL/1856 Q461569-1 QW-2140YC-01/03 1 C
12 1002 7237 PLATE/MAIN 2140 Q151840-1 QW-2140YC-01/03 1 C
13 1002 7256 PLATE/SHIELD 2140 Q367471-1 QW-2140YC-01/03 1 C
14 1002 7248 PLATE/SWITCH 2140 Q466969-1 QW-2140YC-01/03 1 C
15 7231 1863 PLATE/TERMINAL 1827 Q460803A-1 QW-2140YC-01/03 1 C
16 7207 8776 SCREW/658 Q426010-1 QW-2140YC-01/03 4 C
17 7211 9045 SHEET/INSULATION 262 Q45482A-1 QW-2140YC-01/03 1 C
18 1002 7255 SPACER/2140 Q367410-1 QW-2140YC-01/03 1 C
19 7230 1012 SPRING/COIL 1673-3 Q459480-1 QW-2140YC-01/03 1 B
20 1002 7269 SPRING/COIL 2140-1 Q466974A-1 QW-2140YC-01/03 2 B
21 1002 7270 SPRING/COIL 2140-2 Q466975-1 QW-2140YC-01/03 2 B
22 7201 9599 SPRING/COIL 967-1 Q430081-1 QW-2140YC-01/03 1 B
BATTERY/LITHIUM CR1620 QW-2140YC-01/03 1
For the prices and minimum order/supply quantities of the above parts, refer to the Parts Price List P.P.L.-562.
Notes: Q – Used quantity
R – Rank — 10 —

—11 —
AC
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 Aand Cbuttons at the normal time keeping 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 Dbutton.
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-2140
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.
QW-2140
Metallic tweezers
A
C
L
B
D

— 12 —
6-3. IMPROVING SIGNAL RECEPTION
To improve signal reception, put the watch as shown in the illustrations. (Display: up)
Resin Band Metal Band
Pass through band loop.

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