Casio WVA-300D Troubleshooting guide

SERVICE MANUAL
& PARTS LIST
(WITHOUT PRICE)
QW-2367
MODULE NO.
R
REF. NO. S/M-763
JAN. 2002
WVA-300D

CONTENTS
1. SPECIFICATIONS: QW-2367..................................................................... 1
2. OPERATION CHART: QW-2367................................................................ 2
3. DRAWINGS: QW-2367
3-1. LCD DIAGRAM ............................................................................................. 7
3-2. CIRCUIT DIAGRAM ...................................................................................... 8
3-3. CHECKING TERMINALS AND COMPONENTS ..........................................9
3-4. P1 ~ P5 PADS ...............................................................................................9
4. EXPLODED VIEW: QW-2367.................................................................... 10
5. PARTS LIST: QW-2367............................................................................. 11
6. PRECAUTIONS FOR REPAIR: QW-2367
6-1. AC (ALL CLEAR) AND REMOVING OF MODULE ..................................... 12
6-2. ACCURACY CHECKING .............................................................................12
7. TROUBLESHOOTING: QW-2367 ............................................................. 13

— 1 —
1. SPECIFICATIONS: QW-2367
Battery CTL1616 (Storage battery)
Note: Use CTL1616 only. Other storage battery or CR1616 can cause
damage to the watch.
Battery life Approx. 6 month (from full charged condition)
Current consumption 0.548 µA maximum
Alarm system Piezo plate on Cover/Back
Accuracy ±15 sec./month
Accuracy setting system Trimmer capacitor
Accuracy checking See page 12
Functions • Electro-luminescent backlight
Afterglow
• Solar powered
• Time calibration signal reception
Auto receive (Twice a day, at 2:00 AM, 4:00 AM)
Manual receive
Last date/time received display
• Time Calibration Signal
Station name: DCF77 (Mainflingen, Germany)
Frequency: 77.5 kHz
Range: Approx. 1,000 km
• 20 Telememo pages
8 letters and 12 numbers per page
Others: Auto-sort, remaining memory
• World Time
29 time zones (28 cities), daylight saving time on/off
• Day Counter
Automatically counts down the days from the current date to a target date.
Memory capacity: 5records (8 characters of text)
• 1/100-sec. stopwatch
Measuring capacity: 23:59’59.99"
Measuring modes: Elapsed time, split time, 1st-2nd place times
• Daily alarms
3 independent daily alarms
• Hourly time signal
• Low battery warning display
• Auto-calendar (to year 2039)
• 12/24-hour format
• Regular timekeeping:
Analog: 2 hands (Hr, min.)
Digital: Hr, min, sec, pm, month, date, day
Item Detail

— 2 —
2. OPERATION CHART: QW-2367
General Guide
· Press Cto change from mode to mode.
· In any mode, press Bto illuminate the display. Alarm Mode
Stopwatch Mode
Timekeeping Mode
Telememo Mode
Hand Setting Mode
Day Counter Mode
Press C.
Timekeeping
Use the Timekeeping Mode to set and view the current time and date.You can
also display the Last Signal screen in the Timekeeping Mode.
· The Last Signal screen alternates between the time and date that the time
calibration signal was successfully received.
CurrentTime 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
“SelectingYour 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 Digital Time and Date Manually” for information about
manual settings.
· The analog time of this watch is synchronized with the digital time.Because
of this, the analog time setting is automatically adjusted whenever you
change the digital setting. See “AnalogTimekeeping” for more information.
Last Signal Date Time
Receive date
Receive time
Receive indicator
PressD. Press A.
Month – Day
Day of week PM indicator Seconds
Hour : Minutes
3.When the setting you want to change is flashing, use Band/or Dto
change it as described below.
Screen
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Setting the DigitalTime and Date Manually
Once you select a Home City code and set its time, you can view the current
time in other cities by simply changing the city code setting.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 digital time and date manually
1.In the Timekeeping Mode, hold down Auntil the
current Auto Receive On/Off setting (the receive
indicator) starts to flash, which indicates the setting
screen.
2.Press Cto move the flashing in the sequence
shown below to select other settings.
Setting
Auto Receive
City Code
DST
12/24-Hour
format
Button Operations
Press Dto toggle auto receive on and off.
Use D(+) and B(–) to change the
setting.
Press Dto toggle between Daylight
Saving Time (ON) and standard time
(OFF).
· Pressing Dperforms a different
operation when BER, LON, PAR, CAI, or
JRS is selected as Home City Code.See
“Auto SummerTime (DST) Switching”.
Press Dto toggle between 12-hour (12H)
and 24-hour (24H) timekeeping.
Auto
Receive
Hour
12/24-Hour
Format
City Code SecondsDST
Day Month Year Minutes
Sleep
Mode
4.Press Ato exit the setting screen.
· The Auto Receive setting is used for time calibration signal reception only.
See “About Auto Receive” for details.
· See “City CodeTable” at the back of this manual for a complete list of
available codes.
· See details about the sleep mode.
· Resetting the seconds to 00 while the current count is in the range of 30 to
59 causes the minutes to be increased by 1.In the range of 00 to 29, the
seconds are reset to 00 without changing the minutes.
Setting
Hour, Minutes
Seconds
Month, Day
Year
Sleep Mode
Button Operations
Use D(+) and B(–) to change the
setting.
Press Dto reset the seconds to 00.
Use D(+) and B(–) to change the
setting.
Press Dto toggle the sleep mode on
(On) and off (OF).
Screen
SelectingYour 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 CodeTable” at the back of this manual for a complete list of
available codes.
· Once you select a Home City code and set its time, you can use World Time
to view the current time in any one of 28 cities (29 time zones) around the
world by simply specifying a city code.
To select your Home City code
1.In the Timekeeping Mode, hold down Auntil the
current Auto Receive On/Off setting (the receive
indicator) starts to flash, which indicates the setting
screen.
2.Press Cto move the flashing to the City Code
setting.
3.Use D(+) and B(–) to change it.
4.Press Ato exit the setting screen.
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 twice 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.
· Time calibration reception is limited to specific geographic areas inWest
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.
City code
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· 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 —
Auto SummerTime (DST) Switching
The time calibration signal transmitted from Mainflingen, Germany includes
both standard time and summer time (Daylight Saving Time or DST) data.
Because of this, the watch automatically switches between standard time and
summer time (DST) automatically whenever BER, LON, PAR, CAI, or JRS is
selected as the Home City code.
· Daylight Saving Time (DST) advances the time setting by one hour from
Standard Time. Remember that not all countries or even local areas use
Daylight Saving Time.
Auto SummerTime (DST) Default Settings
The following shows the default settings for each of the Home City codes that
support auto summer time (DST) switching.
The following flows show how to switch the auto summer time setting between
AUTO, ON, and OFF.
· The following are the meanings of the AUTO, ON, and OFF indicators.
AUTO - Watch will switch between standard time and summer time (DST)
automatically.
ON - Summer time (DST)
OFF - Standard time (summer time turned off)
· See information about configuring summer time (DST) settings.
Home City Code
BER, LON, PAR
CAI, JRS
Auto SummerTime Default Setting
AUTO
OFF
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.
· Position the watch so the case is pointing
upwards as shown in the nearby illustration.This
puts the watch in the optimum position for time
calibration signal reception.
· Note that signal reception is poor if the watch is
on its back or side.
2.In the Timekeeping Mode, hold down Dfor about
two seconds, until the watch beeps and the current
time is flashing on the display.
· This 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.
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Receive indicator
Current time
When BER is the Home City Code
When LON, PAR, CAI, or JRS is the Home City Code
AUTO (Default)
PressD.After receipt of the time calibration
signal turns summer time OFF.
After receipt of the time calibration
signal turns summer time ON.
AUTO (Default for
LON and PAR)OFF (Default for
CAI and JRS)ON
PressD.Press B.
Press Bor D.
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.
· 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.
· The receive indicator ( ) indicates that the calibration time reception
attempt was successful.
Note
· To interrupt a receive operation and return to theTimekeeping Mode (Date or
Time 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 Mode (Date or Time screen).
· You can also change from the Last Signal screen to the Timekeeping Mode
(Date or Time screen) by pressing D.
About the Receive Indicator
The receive indicator shows the strength of the calibration signal being received.
Weak Strong
displayed time is actually the correct time.
· When two 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.
To turn auto receive on and off
1.In the Timekeeping Mode, hold down Auntil the
current Auto Receive On/Off setting (the receive
indicator) 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.
AnalogTimekeeping
The analog time of this watch is synchronized with the digital time.The analog
time setting is adjusted automatically whenever you change the digital time.
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· 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 or both of the last calibration
time reception attempts were successful.If you do not see the receive
indicator, it means there was some problem with the last calibration reception
operation.Either perform reception manually, or make sure the watch is set
up properly to receive the time calibration signal for the next automatic
reception time.
· Even if the calibration reception is successful, the receive indicator
disappears every day at 3am.
· 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, and 4:00
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, and 4:00 AM, regardless of whether or not the
the analog time.
To adjust the analog time
1.In the Timekeeping Mode, press Cfive times to
enter the Hand Setting Mode.
2.Hold down Auntil the current digital time starts to
flash, which indicates the setting screen.
· Note that you will not be able to change to the
setting screen if the analog hands are moving
because the watch is automatically adjusting the
analog time to match the digital time. If this
happens, wait until the hands stop moving.
3. Use D(+) and B(–) to adjust the analog setting
as described below.
Current time
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When you want to do this:
Move the hand setting
forward 20 seconds
Perform this button operation:
· PressD.
Note
· Whenever you manually change the digital time setting or Home City code, or
if the time is adjusted by receipt of a time calibration signal, the hands of the
analog timepiece move clockwise or counter clockwise to adjust to the new
setting. If the analog time does not match the digital time for any reason, use
the procedure described under “To adjust the analog time” to match the
analog setting to the digital setting.
· Whenever you need to adjust both the digital and the analog time settings
manually, make sure you adjust the digital setting first.
· Depending on how much the hands have to move in order to adjust to the
digital time, it may take some time before the analog hands stop moving.
· The analog time does not change while a signal receipt operation is in
progress.After the receive operation is complete, the analog time is
automatically adjusted to match the digital time.
· If a signal receive operation is performed while the analog time and digital
time do not match, the digital time will be adjusted correctly but the analog
time may not be adjusted.If this happens, perform the steps below to adjust
About Auto Receive
When auto receive is turned on, the watch automatically starts to receive the
time calibration signal when the digital time in theTimekeeping Mode reaches
2:00 AM, and 4:00 AM each day (calibration times).
Note
· The Auto Receive operation is performed only if the watch is in the
Timekeeping 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).

— 4 —
When you want to do this:
Move the hand setting a
long way back at high
speed
Perform this button operation:
· While holding down Bto move the hands
at high-speed, press Dto lock the high-
speed hand movement.
· Press any button when the hands are
close to the setting you want.
· Hand movement stops automatically if the
hour hand makes one full (12-hour)
revolution.
When you want to do this:
Move the hand setting
back 20 seconds
Move the hand setting a
short way forward at high
speed
Move the hand setting a
short way back at high
speed
Move the hand setting a
long way forward at high
speed
Perform this button operation:
· Press B.
· Hold down D.
· Release Dwhen the hands reach the
setting you want.
· Hold down B.
· Release Bwhen the hands reach the
setting you want.
· While holding down Dto move the hands
at high-speed, press Bto lock the high-
speed hand movement.
· Press any button when the hands are
close to the setting you want.
· Hand movement stops automatically if the
hour hand makes one full (12-hour)
revolution.
4.Press Ato exit the setting screen.
· The minute hand will be adjusted slightly to match the seconds when you
exit the setting screen.
· To return to theTimekeeping Mode, press C.
To recall Day Counter records
Enter the Day Counter Mode, and the Target Date/Text screen appears.
· The Target Date/Text screen alternates between the target month and day,
and the target year.
Target Date/Text Day Counter
Press A.
Target Month – Day Target year
Text Day counter
Minus sign
Day Counter
The Day Counter lets you count the number of days from theTimekeeping
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.
· Press Dto cycle through the Day Counter records as shown below.
DC1 DC3 DC4 DC5DC2
To set a Day Counter record
1.In the Day Counter Mode, use Dto scroll through
the Day Counter records until the one you want to
set is on the display.
2.Hold down Auntil the flashing cursor appears on
the display, which indicates the setting screen.
· Pressing Band Dat the same time causes the
message “CLEAR”to appear and clears the text
(if there is any already input), and sets the
current Timekeeping Mode date as the target
date.
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Target Month – Day
Cursor
Text Meaning
ANIV. Anniversary
EVENT Event
BIRTHDAY Birthday
DC4 No setting
DC5 No setting
· Your watch comes preset with the Day Counter text settings shown below.
You can use these as they are or change them to something else, if you want.
· If there is no text assigned to a target date, the applicable day counter
number appears in place of the text.
· A minus sign (
x ) in the upper left corner of the display indicates that the
target date comes before the current date. No sign indicates the target date is
after the current date.
Day Counter Number
DC1
DC2
DC3
DC4
DC5
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 theYear setting.
· When theYear setting is selected, the cursor changes for a four-digit target
year.
· 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.
· See “Character List”at the back of this manual for details on how the watch
sorts records.
· All of the operations in this section are performed in the Telememo Mode,
which you enter by pressing C.
To create a newTelememo record
1.In the Telememo Mode, press Duntil a record
showing “– – –” (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.
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. Memory Number/Name Telephone Number
Press A.
Remaining memory Memory number
Name Telephone number
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 the
Telememo record screen (without the cursor).
· The display can show only three characters at a time, so longer text scrolls
continuously from right to left.
0 to 9
–
(space)
PressD.
Press B.
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.
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.
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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.
· The display can show only three characters at a time, so longer text scrolls
continuously from right to left.
To recall Telememo records
In the Telememo Mode, press D(+) to scroll throughTelememo records on
the display.
· Only the memory number and name of each Telememo record appear on the
display as you scroll through Telememo records.
· Pressing Awhile the memory number/name screen is on the display
changes to the telephone number screen for that record.
· The display can show only five digits of the telephone number at a time, so
longer numbers scroll continuously from right to left.

— 5 —
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.Press Band Dat the same time to delete the record.
· The message “CLEAR”appears for a few moments, and then the cursor
appears on the display, ready for input.
4.Input data or press Ato return to the Telememo record screen.
To set an alarm time
1.In the Alarm Mode, press Dto select the alarm
whose time you want to set.
AL1 AL2 AL3 SIG
2.Hold down Auntil the hour setting of the alarm
time starts to flash, which indicates the setting
screen.
· This automatically turns on the alarm.
3.Press Cto move the flashing between the hour and minute settings.
4.While a 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).
· If you have 24-hour timekeeping selected in theTimekeeping Mode, the
alarm time is also displayed in 24-hour format.
5.Press Ato exit the setting screen.
Alarms
You can set three independent Daily Alarms.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 alarm and HourlyTime Signal operate in
accordance with the current digital time.
· 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 time
Alarm number
Alarm on indicator
Hourly time signal
on indicator
Alarm Operation
The alarm sounds at the preset time for about 10 seconds in all modes, or until
you stop it by pressing any button.
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, press Dto select an alarm or the Hourly Time Signal.
2.When the alarm or the Hourly Time Signal you want to is selected, press A
to turn it on and 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.
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.
Seconds
1/100 second
Hours
Minutes
To measure times with the stopwatch
D
Start Stop
ElapsedTime
Re-start Clear
D
Stop
DD A
SplitTime
D
Start Split Split release Clear
A
Stop
A D A
Two Finishes
D
Start Split Stop Clear
A
Split release
DAA
First runner
finishes.
Display time of
first runner.
Second runner
finishes. Display time of second runner.
Battery
This watch is equipped with a solar cell and a rechargeable battery (secondary
battery) that is charged by the electrical power produced by the solar cell.
Important!
· Storing the watch for long periods in an area where there is no light or
wearing it in such a way that it is blocked from exposure to light can cause
rechargeable battery power to run down.Be sure that the watch is normally
exposed to light whenever possible.
· This watch employs a solar cell that converts light into electricity that charges
a built-in rechargeable battery.Normally, the rechargeable battery should not
need replacement, but after very long use over a number of years, the
rechargeable battery may lose its ability to achieve a full charge. Should you
notice problems with getting the rechargeable battery to a full charge, contact
your dealer or CASIO distributor about having the rechargeable battery
replaced.
· The rechargeable battery should be replaced with a CASIO-specified CTL1616
battery only. Other rechargeable batteries can cause damage to the watch.
Battery Power Indicator
The battery power indicator on the display shows you the current status of the
rechargeable battery’s power.
· Turn on the watch’s sleep mode and keep it in an area normally exposed to
light when storing it for long periods.This helps to keep the rechargeable
battery from going dead.
· At Level 4, all functions are disabled.Functions are enabled once again after the
rechargeable battery is charged, but anything previously stored in memory is lost.
Because of this, you must set the current time and alarms, and re-input
Telememo records after the rechargeable battery is charged.
· Leaving the watch in direct sunlight or some other very strong light source
can cause the battery power indicator to temporarily show a reading that is
actually higher than the battery level.The correct battery power indicator
should appear after a few minutes.
· If you use the light or alarms a number of times during a short period, a
RECOVER indicator ( )appears on the display and the following
operations become disabled until battery power recovers.
Backlight
Alarm and hourly time signal
Coordination between digital and analog timekeeping
Time calibration signal reception
After some time, battery power will recover and the RECOVER indicator will
disappear, indicating that the above functions are enabled again.
Charging Precautions
Certain charging conditions can cause the watch to become very hot.Avoid
leaving the watch in the areas described below whenever charging its
rechargeable battery.
Warning!
Leaving the watch in sunlight to charge its rechargeable battery can
cause it to become quite hot.Take care when handling the watch to avoid
burn injury.
· On the dashboard of a car parked in direct sunlight
· Too close to an incandescent lamp
· Under direct sunlight or in any other area exposed to intense heat for long
periods
Level
1
2
3
4
Battery Power
Indicator Function Status
All functions enabled.
All functions enabled.
Auto and manual signal receive,
alarm, hourly time signal,
backlight, and display are
disabled.Though the hands of
the watch do not move, time
continues to be kept internally.
All functions, including
timekeeping, are disabled.
l
l
l
l
l
l
l
l
l
l
l
l
Battery power
indicator RECOVER
indicator

— 6 —
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 the watch in any mode (except for the Stopwatch 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
saves anything you have input up to that point and exits the setting screen.
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.
Initial Screens
The following shows what appears on the display first in each mode.
Mode
Alarm
Day Counter
Telememo
Screen
Data you were last viewing.
Target Date/Text screen with data you were last
viewing.
Memory Number/Name screen with data you were
last viewing.
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 1000
kilometers.
At distances further than about 500 kilometers, the
signal may become weak and reception may be
impossible under certain conditions.
· 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 may be poor in the shaded area
on the map, even though it is within 1,000
kilometers of the signal transmitter.
· Signal reception is affected by weather, atmospheric conditions, and
seasonal changes.
· The time calibration signal is bounced off 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.
Frankfurt
· Think of the watch as acting like aTV 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
· 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 with the precision noted in“Specifications.”
Timekeeping
· Note that you cannot switch between standard time and Daylight Saving Time
while GMT is selected as the city code.
· 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.
· The current time for all city codes in theTimekeeping Mode is calculated in
accordance with the Greenwich Mean Time (GMT) differential for each city,
based on the your Home City time setting.
· GMT differential is calculated by this watch based on Universal Time
Coordinated (UTC) data.
InputtingText
The following describes how to input text in the Day Counter and Telememo
Modes.
To input characters
1.When the cursor is on the display, use Band D
to cycle through the available letters, numbers and
symbols, in the sequence shown below.
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.
l
l
l
l
l
l
l
l
l
l
:/.–
(space)
0 to 9
A
to Z
Press D.Press B.
Cursor
Day Counter record
setting screen
12-hour/24-hourTimekeeping Formats
The 12-hour/24-hour timekeeping format you select in the Timekeeping 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.
press any button.
· It takes up to about five seconds for the watch to recover from the sleep
mode.
· Even when the watch is in the sleep mode, digital-analog time coordination
and auto signal receive are both performed.
· See page for information about configuring sleep mode settings
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 Bto illuminate the display for about one second.
· 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.
Sleep Mode
While the sleep mode is turned on, the watch automatically goes to "sleep" to
save power whenever it is left in a place where lighting is dim (less than about
30 lux).
The following shows how watch functions are affected when left in a dark place
while in the sleep mode.
To exit the sleep mode, move the watch to a location that is more brightly lit, or
Approximate Period
in Sleep Mode
3 to 4 days
8 days or more
Functions
· LCD off
· Alarm, hourly time signal, analog timekeeping
and auto signal receive enabled
· LCD off, alarm and hourly time signal disabled
· Analog timekeeping stopped at 12 o’clock
· Auto signal receive disabled
Troubleshooting
Check the following points whenever you experience problems with your watch.
Problem
Cannot perform
manual receive.
Auto receive is
turned on, but
the receive
indicator does
not appear on
the display.
Time setting is
incorrect
following signal
reception.
Probable Cause
The watch is not in theTimekeeping Mode.
· You changed the time setting manually.
· The watch was not in theTimekeeping
Mode or you were performing some
button operation during the last auto
signal receive operation was performed.
·
The receive indicator disappears if a single
receive operation is not successful. Even if
receive is successful, the receive indicator
disappears every day at 3am.
· If the time is one hour off, DST is turned on.
· The Home City Code setting is not
correct for the area where you are using
the watch.
What you should do
Enter the Timekeeping Mode
and try again.
· Wait perform manual signal
receive or wait until the next
auto signal receive operation
is performed.
· Check to make sure the watch
is in a location where it can
receive the signal.
·
Put the watch in a location that
is suitable for good reception.
· Turn off DST.
· Select the correct Home City
Code.

— 7 —
3. DRAWINGS: QW-2367
3-1. LCD DIAGRAM
SEG. COM.
L 1
L 2
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
SDS
LC1
BAT0
X0Y4
X1Y4
X2Y4
X3Y4
X4Y4
DST
e3
d3
c3
e2
d2
c2
X5Y4
X6Y4
X7Y4
X8Y4
X9Y4
X18Y4
X17Y4
X16Y4
X15Y4
X14Y4
X13Y4
X12Y4
X11Y4
X10Y4
LC2
BAT1
X0Y3
X1Y3
X2Y3
X3Y3
X4Y3
c0
d0
e0
c1
d1
e1
COL
X5Y3
X6Y3
X7Y3
X8Y3
X9Y3
X18Y3
X17Y3
X16Y3
X15Y3
X14Y3
X13Y3
X12Y3
X11Y3
X10Y3
ANT2
LC3
ALM
X0Y2
X1Y2
X2Y2
X3Y2
X4Y2
b0
g0
f0
b1
g1
f1
HYP
X5Y2
X6Y2
X7Y2
X8Y2
X9Y2
X18Y2
X17Y2
X16Y2
X15Y2
X14Y2
X13Y2
X12Y2
X11Y2
X10Y2
ANT1
LC4
SIG
X0Y1
X1Y1
X2Y1
X3Y1
X4Y1
PM
a0
a3
a1
a2
X5Y1
X6Y1
X7Y1
X8Y1
X9Y1
X18Y1
X17Y1
X16Y1
X15Y1
X14Y1
X13Y1
X12Y1
X11Y1
X10Y1
ANT0
LC5
RECOVER
X0Y0
X1Y0
X2Y0
X3Y0
X4Y0
24H
f3
g3
b3
f2
g2
b2
X5Y0
X6Y0
X7Y0
X8Y0
X9Y0
X18Y0
X17Y0
X16Y0
X15Y0
X14Y0
X13Y0
X12Y0
X11Y0
X10Y0
SDC
CHARGE
L1 L2 L3 L4 L5 L6 L7 L8 L9 L10 L11 L12 L13 L14 L15 L16 L17 L18 L19 L20 L21 L22 L23 L24 L25 L26 L27 L28 SDS SDC LC1 LC2 LC3 LC4 LC5
PM
24H
DST
ALM
a3 b3
f3 g3
e3 c3
d3
X0
a2
f2 b2
g2
e2 c2
d2
HYP
COL a1
f1 b1
g1
e1 c1
d1
a0
f0 b0
g0
e0 c0
d0
X18Y4
ANT2
Y0
SIG
CHARGE BAT0 BAT1 RECOVER
ANT0
ANT1

— 8 —
3-2. CIRCUIT DIAGRAM
LSI
TOTAL 123PINS
BONDING 81PINS
LCD
INV
IC
✽ 1.No bonding ✽ 2.Short (Soldering) (Switching function)
KI6: Short (Soldering) KI7: Open (No Soldering) KI8: Open (No Soldering)
✽ 3. Latch Type Key ✽ 4.Short (Soldering) ✽ 5.Inclination switch ✽ 6.No mounted in this module.
GND VDD2
BAT
VCH VDD3
VC1 VC2
C1
C3C5
XTB
Xtal1
L1 L28 L29 L61 LC1 SDS SDCLC5
CT
LD1
S1
S2
S3
VDD1
C2
BD1
C8 LL1
Tr1
XT
T1 T2 T3
KI1
KI2 KI3 KI4 KI5 KI6 KI7 KI8
✽3 ✽3 ✽3
KI9
EMP
S4
SCR
SCIN
RP1RP2
Cp
PZ
VDSP
C4
VC3 VC4
Di1
V_TQ
C7
SDA SCL SCUT
AC
T4
✽2
✽2
D0
KC4 KC3 KC2✽1KC1
R1 R2
VSC
C6
SC
C9
CLF1
E'
Cel
EL LL2
L+ VOUT L- GND
CLF2
V+
BACK FRONT
✽4 ✽4 ✽4
O3
✽1
SL
PON
O1 O2
O4
✽1 ✽1
T5
R3
✽3
✽3
✽3 ✽3 ✽3
LD2
VC5 VC6
✽1✽1
✽1✽1
Z
SK
✽2
✽1
VPM RPM C21
PON REG
AGC
VSM0 VSM1
TCOGND
HOLD
VCC
1 2 3 4 5 6 7 8
16 15 14 13 12 11 10
9
C14
C11C12C13
R7
C17
C18 C20
C22
R5
Xtal2
R3
ANT
R2
R4
Di2 R1
An.B
KS ✽5
✽1
C19
R6
Rb
GNDB
✽6
Rpd

— 9 —
3-3. CHECKING TERMINALS AND COMPONENTS
Top view of P.C.B. ass'y Bottom view of P.C.B. ass'y
3-4. P1 ~ P5 PADS
Never solder or desolder these pads, because they have been selected best in the production line.
A new PCB ass'y as a spare parts will be supplied with factory adjustment of these pads.
3
VDD2
V_TQ
GND
VDSP
GND
VDD1
VDD3
GND
VC4
VC3
VPM
R1
R2
R3
16
1
DO
3
CLF1 CLF2 GND
L+ L- VOUT
V+(VDD2)
LC5 LC4 LC3LC2LC1
LC5 LC4
LC3 LC2
AC
T1
T2T4
EMP
R1
R2
R3
XT
XTB
SCIN
SCR
VSC
VDD1
VDD3
VDSP
VC3
VC4
O2
O2
KI6 KI7KI8
KI8
KI7
KI6
D0
2
16
13
12
VPM
VOUT
VCH
BD1
KI9
KI1
KI4
KI2
KI2
KI3
V_TQ
KC4 KC3
16
14
R6
9
SL
KI5
GND GND
GND
GND
GND
VDD2
VDD2
GND
GND
GND
GND
L+
L-
KC1
KI9
CLF2CLF1
GND
GND
R6
GND
GND
VC1
VC2
GND
GND
LD1
L1
LC1
SDC
SDS
L28 L27 L26 L25 L24 L23 L22 L21 L20 L19 L18 L17 L16 L15 L14 L13 L12 L11 L10
L9 L8 L7 L6 L3 L2
KI2
T5
T3
PON
GND
L5 L4
LD1
GND
VDD2
GND
GND
GNDB GND
3
SCIN SCR
12
8 1
9
7
GND
VSC
L
VCH
VC1 VC2
4
7
SCIN
SCIN
VSC
BD1
VDD2
7
AC
KC4
KC1
VCHKI9
KI9
5
KI2
KI3
KI1
KI4
VC1
VSC
GND
GND
GND
GND
GND
VDD2
GND
16
VDD2
VDD2
L
L
L
GND
GND
LD1
GND
5 4 2 PON
D0 SL 12 13 14
XT
XT
XTB
02 D0
VDD2
KC3
VOUT
VDSP
R1
R1
R1
R4
R4
R7
R7
GNDB
KC1
GND
GND
KI8
GND
O1
Xtal2
Capacitor/Chip
C22 Capacitor/Chip
C17 Resistor/Chip
Rpd
Capacitor/Chip
C18
Capacitor/Chip
C19 Capacitor/Chip
C20 Capacitor/Chip
C21
Capacitor/
Chip
C14
Transistor
Tr1
Diode
Di2
Diode
Di1
Capacitor/
Chip
Cel
Resistor/Chip
RPM
Resistor/Chip
RP1
Resistor/
Chip
RP2
Coil
LL2
Coil
LL1
Inverter
INV
3. PCB ASS'Y
(7640 5122)
4. Capacitor/Trimmer
(1001 0950)
5. Oscillator/Crystal
(1003 0868)
Xtal1
6. Oscillator/Crystal
(7110 6323)
10. Cushion/506
(7211 9631)
10. Cushion/506
(7211 9631)
Resistor/Chip
R5
Resistor/Chip
R6
Resistor/Chip
R3
Varistor
Z
Resistor/
Chip
Rb
Resistor/
Chip
R1
Resistor/Chip
R4
Resistor/
Chip
R7
Detection IC
IC
Capacitor/Chip
C6 Capacitor/Chip
C4
Capacitor/Chip
C7
Capacitor/Chip
C8
Capacitor/Chip
C3 Capacitor/Chip
C2
Capacitor/Chip
C5
Capacitor/Chip
Cp
Capacitor/Chip
C9
Capacitor/Chip
C1
CT
25. Tape/Adhesive
(7229 0789)

— 10 —
4. EXPLODED VIEW: QW-2367
1 (1006 5656)
19 (1006 5661)
20 (1001 4294)
21 (1003 0983)
14 (1006 5662)
9 (1001 6598)
22 (1006 5663)
13 (1006 5645)
15 (1006 5664)
3 (7640 5122)
PCB ass'y
10 (7211 9631)
21 (1003 0983)
2 (1006 5665)
20 (1001 4294)
10 (7211 9631)
11 (7231 1777)
23 (7201 9599)
24 (1006 5659)
17 (7227 0415)
26 (7209 9263)
18 (1006 5653)
12 (1006 5660)
8 (1006 5657)
Battery Storage (CTL1616)
27 (7224 0652)
28 (1005 4633)
7 (7640 5041)
7-1 (1006 2535)
7-2 (7227 0273)
16 (7227 0252)

5. PARTS LIST: QW-2367
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 Specification Applicable Q R
1006 5039 MODULE/WITH MOVEMENT QW-2367YCSA-01 WVA-300D-1A1/1A2 1 A
WVA-300K-1A
1 1006 5656 LCD C2368-01 QW-2367YCSA-01 1 A
2 1006 5665 EL YEL-2368-A-01 QW-2367YCSA-01 1 A
3 7640 5122 PCB ASS'Y Q255288*1TK QW-2367YCSA-01 1 A
4 1001 0950 CAPACITOR/TRIMMER CTZ2E-30C-W2-P QW-2367YCSA-01 1 B
5 1003 0868 OSCILLATOR/CRYSTAL C2-77.503KHZ-10/10 QW-2367YCSA-01 1 B
6 7110 6323 OSCILLATOR/CRYSTAL DT-26S11 QW-2367YCSA-01 1 B
7 7640 5041 ANALOG BLOCK QW-2368MV-82TK QW-2367YCSA-01 1 A
7-1 1006 2535 COIL ASS'Y Q369124*1 QW-2367YCSA-01 1 B
7-2 7227 0273 SCREW/1300-1 Q436969A-1 QW-2367YCSA-01 2 B
8 1006 5657 BATTERY/STORAGE CTL1616 QW-2367YCSA-01 1 C
9 1001 6598 CONTACT/BATTERY(-) Q366836-1 QW-2367YCSA-01 1 C
10 7211 9631 CUSHION/506 Q49364-1 QW-2367YCSA-01 2 C
11 7231 1777 HOLDER 1381 Q456843-1 QW-2367YCSA-01 1 C
12 1006 5660 HOLDER 2368 Q255111A-1 QW-2367YCSA-01 1 C
13 1006 5645 HOLDER/BATTERY Q255199A-1 QW-2367YCSA-01 1 C
14 1006 5662 INTERCONNECTOR Q468267-1 QW-2367YCSA-01 1 C
15 1006 5664 LABEL Q468543-1 QW-2367YCSA-01 1 C
16 7227 0252 SCREW 722 Q431332-1 QW-2367YCSA-01 1 B
17 7227 0415 SCREW/TAPPING Q450646B-1 QW-2367YCSA-01 1 B
18 1006 5653 SOLAR ASS'Y AM-2605B QW-2367YCSA-01 1 C
19 1006 5661 SPACER Q369365-1 QW-2367YCSA-01 1 C
20 1001 4294 SPRING/COIL 2306-1 Q466513A-1 QW-2367YCSA-01 2 B
21 1003 0983 SPRING/COIL 2362-1 Q467328A-1 QW-2367YCSA-01 2 B
22 1006 5663 SPRING/COIL 2368 Q468519-1 QW-2367YCSA-01 1 B
23 7201 9599 SPRING/COIL 967-1 Q430081-1 QW-2367YCSA-01 1 B
24 1006 5659 SUPPORTER/PCB ASS'Y Q152109A-1 QW-2367YCSA-01 1 C
25 7229 0789 TAPE/ADHESIVE Q462101-1 QW-2367YCSA-01 1 C
26 7209 9263 TAPE/ADHESIVE 658-B Q428127-1 QW-2367YCSA-01 2 C
27 7224 0652 WASHER Q421691-1 QW-2367YCSA-01 1 C
28 1005 4633 WHEEL/HOUR Q350681D-2 QW-2367YCSA-01 1 C
For the prices and minimum order/supply quantities of the above parts, refer to the Parts Price List P.P.L.-578.
Notes: Q - Used quantity
R - Rank — 11 —

— 12 —
6. PRECAUTIONS FOR REPAIR: QW-2367
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 positive (+) side of the battery or 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 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 D button, press Aand Cbuttons 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”
Press any 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. QW-2367
A
C
B
D

— 13 —
7. TROUBLESHOOTING: QW-2367
This is a flow chart about signal reception.
Yes
No
Yes
No
Yes
No
Yes
No
START
Check whether the Home City
code is selected correctly.
To perform MANUAL time
calibration signal reception
(See page 3 of this manual).
OK
There is a possibility of location bad.
Check your location, to see page 6 of this manual.
To perform AUTO time
calibration signal reception
(See page 3 of this manual).
Replace the PCB ass'y
Signal
reception OK?
Signal
reception OK?
Signal
reception OK?
Replace the Case center
ass'y with antenna
Signal
reception OK?
OK
OK
OK

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