Casio WVA-400D Troubleshooting guide

SERVICE MANUAL
& PARTS LIST
(WITHOUT PRICE)
QW-2727/2730
MODULE NO.
R
REF. NO. S/M-817
JUN. 2003
WVA-400D WVA-400DJ
Ver.1 : Nov. 2003

CONTENTS
Page
1. SPECIFICATIONS: MODULE QW-2727/2730 ........................................... 1
2. OPERATION CHART: MODULE QW-2727 ............................................... 2
3. DRAWINGS: MODULE QW-2727/2730
3-1. LCD DIAGRAM ............................................................................................. 9
3-2. CIRCUIT DIAGRAM ..................................................................................... 10
3-3. CHECKING TERMINALS AND COMPONENTS .........................................12
3-4. N1, N2, R1~ R3 PADS ................................................................................. 13
4. EXPLODED VIEW: MODULE QW-2727/2730 .......................................... 14
5. PARTS LIST: MODULE QW-2727/2730 ................................................... 16
6. PRECAUTIONS FOR REPAIR: MODULE QW-2727/2730
6-1. AC (ALL CLEAR) AND REMOVING OF MODULE ..................................... 17
6-2. ACCURACY CHECKING ............................................................................. 17
6-3. SOLAR CELL-PCB ASS'Y CONTACT CHECKING....................................18
6-4. HOW TO CHECK TILT SENSOR.................................................................18
7. TROUBLESHOOTING: MODULE QW-2727/2730....................................19

— 1 —
1. SPECIFICATIONS: MODULE QW-2727/2730
Battery CTL1616 (Storage battery)
Note: Use CTL1616 only. Other storage battery or CR1616 can cause
damage to the watch.
Battery life Approx. 5 months (from full charged condition)
Current consumption 0.568 µA maximum
Alarm system Piezo plate on Cover/Back
Accuracy ±15 sec./month
Accuracy setting system Trimmer capacitor
Accuracy checking See page 17
Functions • LED light
Afterglow
• Solar powered
• Time calibration signal reception
Auto receive
Manual receive
Last date/time received display
• Time Calibration Signal
QW-2727: Receivable Time Calibration Signals
Mainflingen, Germany (Call Sign: DCF77, Frequency: 77.5kHz)
QW-2730: Receivable Time Calibration Signals Fort Collins,
Colorado (Call Sign: WWVB, Frequency: 60kHz)
Fukushima, Japan (Call Sign: JJY, Frequency: 40kHz)
Fukuoka/Saga, Japan(Call Sign: JJY, Frequency: 60kHz)
• e-DATE MEMORY
Meomory capacity: Up to 40 records for Internet access codes and other
data (when there are 7characters per record), actual number of records
depends on the number of characters per record
• World Time
29 time zones (30 cities), daylight saving time on/off
• Time Memo
Memory for up to 10 time memos, each with date (month and day) and time
• 1/100-sec. stopwatch
Measuring capacity: 23:59’59.99"
Measuring modes: Elapsed time, split time, 1st-2nd place times
• Daily alarms
5 independent daily alarms snooze feature for one alarm only
• Hourly time signal
• Low battery warning display
• Auto-calendar (to year 2039)
• 12/24-hour format
• Regular timekeeping:
Analog: 3 hands (Hr, min, sec)
Digital: Hr, min, sec, pm, month, date, day
Item Detail

— 2 —
2. OPERATION CHART: MODULE QW-2727
Getting Acquainted
Congratulations upon your selection of this CASIO watch. To get the most out of your
purchase, be sure to carefully read this manual and keep it on hand for later reference
when necessary.
Expose the watch to bright light to charge its battery before using it.
You can use this watch even as its battery is being charged by exposure to bright
light.
•Be sure to read“Battery”of this manual for important information you need to
know when exposing the watch to bright light.
AboutThis Manual
•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.
If the digital display of the watch is blank...
If the Power Saving indicator (
PS
) is flashing on the display,
it means that the display is blank because the watch’s
Power Saving function has turned off the display to
conserve power. Power Saving automatically turns off the
display and enters a sleep state whenever your watch is
left for a certain period where it is dark. If the watch is kept
in the dark for a longer period, the analog hands will also
stop moving after a few days.
•The initial factory default setting is Power Saving on.
•The watch recovers from the sleep state if you move it to
a well-lit area, if you press any button, or if you angle the
watch towards your face for reading.
•See “Power Saving Function”for more information.
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▲ ▲
▲
Alarm Mode Data Memory Mode
Time Recorder Mode
Stopwatch Mode
▲
General Guide
•Press Cto change from mode to mode.
•In any mode, press Bto illuminate the display.
Timekeeping Mode Press C.
▲
▲
▲
WorldTime Mode
Hand Setting Mode
Radio-controlledTimekeeping
This watch is designed to pick up a time calibration signal
transmitted from Mainflingen, Germany (located 25
kilometers southeast of Frankfurt), and update its time
setting accordingly.The time calibration signal includes
both Standard Time and Daylight Saving Time (summer
time) data.
CurrentTime Setting
This watch automatically adjusts its time setting in
accordance with a time calibration signal.You can also
perform a manual procedure to set the time and date,
when necessary.
•The first thing you should do after purchasing this watch
is to set your Home City, which is the city where you will
normally use the watch. For more information, see “To
set your Home City”below.
•See “Setting the Digital Time and Date Manually”for
information about manual settings.
Month –Day
Day of week
Minute hand
Hour hand
Seconds hand
•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 “Analog Timekeeping”for more information.
To set your Home City
1. In the Timekeeping Mode, hold down A until the city
code starts to flash, which indicates the setting screen.
•The second hand will move at high speed to the 12
o’clock position, where it will stop.
2. Use D (+) and B (–) to select the city code you want to
use as your Home City.
•The following are the city codes for major cities in the
Western Europe time zones.
BER and PAR : Berlin, Paris, Milan, Rome,
Amsterdam, Hamburg,
Frankfurt, Vienna
LON : London
3. Press A twice to exit the setting screen.
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City code
•The second hand will advance at high speed to the
correct position in accordance with seconds count of the
digital time, and resume normal movement from there.
•Normally, your watch should show the correct time as
soon as you select your Home City Code. If it does not,
it should adjust automatically after the next auto receive
operation (in the middle of the night).You can also
perform manual receive or you can set the time
manually.
•If you are in an area that does not use Daylight Saving
Time (summer time), turn off the DST setting.
Time Calibration Signal Reception
There are two different methods you can use to receive the time calibration signal:
auto receive and manual receive.
•Auto Receive
With auto receive, the watch automatically picks up the time calibration signal five
times a day at 0:00 a.m., 1:00 a.m., 2:00 a.m., 3:00 a.m., and 4:00 a.m.For more
information, see “About Auto Receive”.
•Manual Receive
Manual receive lets you start a time calibration receive operation with the press of a
button.For more information, see “To perform manual receive”.
Important!
•Position the watch as shown in the nearby illustration, with its 12 o’clock side facing
towards a window. Make sure there are no metal objects nearby.
Resin
Band Metal Band
•Proper signal reception can be difficult or even impossible under the conditions listed
below.
Inside or
among
buildings
Inside a
vehicle Near household
appliances or
office
equipment
Near a
construction
site, airport, or
other sources
of electrical
noise
Near high-
tension
power lines
Among or
behind
mountains
•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 1,000 kilometers.
•At distances further than about 500 kilometers, the
signal may become weak and reception may be
impossible under certain conditions.
•Signal reception may be poor in the shaded area on the
map, even though it is within 1,000 kilometers of the
signal transmitter.
•See the information under “Signal Receive
Troubleshooting”if you experience problems with time
calibration signal reception.
Frankfurt
About Auto Receive
When auto receive is turned on, the watch automatically starts to receive the time
calibration signal when the time in the Timekeeping Mode reaches 0:00 a.m., 1:00
a.m., 2:00 a.m., 3:00 a.m., and 4:00 a.m.each day (calibration times).The watch will
also perform an additional auto receive operation at 5:00 a.m.if none of regularly
scheduled auto receive operations are successful.
•Signal reception is normally better at night than during
the day.
•Time calibration signal reception takes from two to six
minutes.Take care that you do not perform any button
operations or move the watch during this time.

—3 —
Note
• The auto receive operation is performed only if the watch is in theTimekeeping
Mode or World Time Mode when one of the calibration times is reached. It is not
performed if a calibration time is reached while an alarm is sounding, or while you
are configuring settings (while settings are flashing on the display).
• When a receive operation starts, the second hand will move at high speed to the 12
o’clock position where it will stop until the receive operation is complete.
• Auto receipt of the calibration signal is designed to be performed early in the
morning, while you sleep (provided that theTimekeeping Mode 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.
• When auto receive is turned on, the watch receives the calibration signal for two to
six minutes everyday when the time in theTimekeeping Mode reaches each of the
five calibration times.Do not perform any button operation within six minutes before
or after any of the five calibration times.Doing so can interfere with correct
calibration.
• Remember that reception of the calibration signal depends on the time kept in the
digital display.The receive operation will be performed whenever the display shows
one of the five calibration times, regardless of whether or not the displayed time is
actually the correct time.
• When two, three, four, or five 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.
About the Receiving Indicator
The receiving 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 receiving indicator to indicate signal strength.
• Use the receiving indicator as a guide for checking signal strength and for finding the
best location for the watch during signal receive operations.
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Receiving indicator
Weak Strong
(Level 1) (Level 4)
• The Level 4 receiving indicator remains on the display in all modes following
reception of the time calibration signal and calibration of the watch’s time setting.
The Level 4 receiving indicator is not displayed if signal reception was unsuccessful
or after manual adjustment of the current time setting.
• The Level 4 receiving indicator indicates that at least one of the five calibration
signal receive operations was successful.Note, however, that the Level 4 receiving
indicator is cleared from the display at 3:00 a.m.each day.
To perform manual receive
1.Place the watch on a stable surface so its top (12
o’clock side) is facing towards a window.
• Note that signal reception will be poor if the watch is
on its back or side.
2.In the Timekeeping Mode, hold down
D for about two
seconds until the watch beeps.
3.Release
D and the current time or date flashes to
indicate that signal reception has started.
• When a receive operation starts, the second hand will
move at high speed to the 12 o’clock position where it
will stop until the receive operation is complete.
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Receiving indicator
• Time calibration signal reception takes from two to six
minutes.Take care that you do not perform any button
operations or move the watch during this time.
• After signal reception is complete, the display of the
watch changes to the Last Signal screen.
Note
• To interrupt a receive operation and return to the Timekeeping Mode, press D .
• If the receive operation is unsuccessful, the message
ERR appears on the display
for about one or two minutes.After that, the watch returns to the Timekeeping Mode.
• You can also change from the Last Signal or
ERR screen to the normal
timekeeping screen by pressing
D .
To turn auto receive on and off
1.In the Timekeeping Mode, hold down A until the city
code starts to flash, which indicates the setting screen.
• The second hand will move at high speed to the 12
o’clock position, where it will stop.
2.Press
C twice to move the flashing to the auto receive
on/off setting.
3.Press
D to toggle auto receive on (
ON
) and off (
OF
).
• If the current Home City setting is a city code that
does not support auto receive, “
__
”appears in place
of the on/off indicator.This means you cannot turn
auto receive on or off.
4.Press
A twice to exit the setting screen.
• The second hand will advance at high speed to the
correct position in accordance with the digital time
seconds count, and resume normal movement from
there.
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On/off status
To display the Last Signal screen
In the Timekeeping Mode, press D to display the Last Signal screen.The Last Signal
screen shows the date and time that the time calibration signal was last received.
Press .
Last Signal Screen
Receive date Receive time
Alternate at two-
second interval
Signal ReceiveTroubleshooting
Check the following points whenever you experience problems with calibration signal
reception.
• For further information, see “Time Calibration Signal Reception”and “Time
Calibration Signal Reception Precautions”.
Problem
Cannot perform
manual receive.
Auto receive is
turned on, but
the Level 4
receiving
indicator does
not appear on
the display.
Probable Cause
•
The watch is not in theTimekeeping Mode.
•Your current Home City is not one of the
following city codes:
BER, PAR, LON, or ATH.
You changed the time setting manually.
•
•The watch was not in theTimekeeping
or World Time Mode, or you were
performing some button operation
during the auto receive operation.
•
Even if receive is successful, the Level 4
receiving indicator disappears every day
at 3 a.m.
What you should do
•Enter the Timekeeping Mode
and try again.
•Select BER, PAR, LON, or
ATH as your Home City.
•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.
Time setting is
incorrect
following signal
reception.
•If the time is one hour off, the DST
setting may be incorrect.
•The Home City code setting is not
correct for the area where you are using
the watch.
•Change the DST setting to
Auto DST.
•Select the correct Home City
code.
Timekeeping
Use the Timekeeping Mode to set and view the current time and date.
Setting the DigitalTime and Date Manually
Make sure you select your Home City code before you change the current time and
date settings.World Time Mode times are all displayed in accordance with the
Timekeeping Mode settings.Because of this, World Time Mode times will not be
correct if you do not select the proper Home City code before setting the time and
date in the Timekeeping Mode.
Day of week
Hour: Minutes Seconds
Month —Day
Press .
To set the current digital time and date manually
1.In the Timekeeping Mode, hold down A
A
until the city
code starts to flash, which indicates the setting screen.
• The second hand will move at high speed to the 12
o’clock position, where it will stop.
2.Press or
C
C
A
A
to move the flashing in the sequence
shown below to select other settings.
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City code
Auto
Receive
DSTCity Code
Seconds Hour Minutes
12/24-Hour
Format
Day Month Year
/ Press .
Press .
Power
Saving
3. When the setting you want to change is flashing, use and/or to change it as
described below.
Screen: To do this:
Change the city code
Toggle between Daylight Saving
Time (ON ) and Standard Time
(OF)
Toggle between auto receive on
(
ON
) and off (
OF
)
Toggle between 12-hour (
12H
) and
24-hour (
24H
) timekeeping
Do this:
Use D
D
(+) and B
B
(–).
Press
D .
•Pressing
D performs a
different operation when
BER, PAR, LON, or ATH is
selected as Home City code.
See “To change the Daylight
Saving Time (summer time)
setting”.
Press
D .
Press D .
R/C
BER
DST
12H
4. After configuring the Power Saving on/off setting, press to exit the setting screen.
• The second hand will advance at high speed to the correct position in accordance
with the digital time seconds count, and resume normal movement from there.
• See“City CodeTable”for a complete list of available city codes.
• See “Power Saving Function”for details about the Power Saving.
• The auto receive setting is used for time calibration signal reception only.See “About
Auto Receive”for details.
Screen (flashing):
P
'02
ON
To do this:
Reset the seconds to
Change the hour
Change the minutes
Change the year
Change the month
Change the day
Toggle Power Saving on
(
ON
) and off (
OF
)
Do this:
Press D .
Use
D (+) and B (–).
Press
D
A
.
▲
▲
▲
▲

—4 —
To adjust the analog time
1.In the Timekeeping Mode, press Csix times to enter
the Hand Setting Mode.
2.Hold down Auntil “”starts to flash, which indicates
the setting screen.
• The second hand will move at high speed to the 12
o’clock position, where it will stop.
3.If the second hand is not pointing precisely at 12 o’clock
at this time, use Dto adjust its position.
• Each press of Dcauses the second hand to advance
by one second.
4.Press C.This will cause the time on the digital display
to flash, which indicates that adjustment of hour and
minute hands is selected.
5. Use Dand Bto adjust the analog setting as
described below.
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Daylight SavingTime (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.
The time calibration signal transmitted from Mainflingen includes both Standard Time
and DST data.When the DST setting is turned on, the watch switches between
Standard Time and DST (summer time) automatically in accordance with the
Mainflingen signal.
• The default DST setting is Auto DST (
A ) whenever you select BER , PAR , LON ,
or
ATH as your Home City code.
• If you experience problems receiving the time calibration signal in your area, it is
probably best to switch between Standard Time and Daylight SavingTime (summer
time) manually.
To change the Daylight SavingTime (summer time) setting
1. In the Timekeeping Mode, hold down Auntil the city code starts to flash, which
indicates the setting screen.
2. Press Cand the DST setting screen appears.
3. Use Dto cycle through the DST settings in the sequence shown below.
4.When the setting you want is selected, press Atwice to exit the setting screen.
Auto DST ( A ) DST off ( OF ) DST on ( ON )
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.
Note
• The hands for the analog timepiece move to adjust to a new setting whenever any of
the following occurs.
When you change the digital time setting manually
When the digital time setting is changed by time calibration signal reception
When you change the Home City code and/or DST 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.
Move the hand setting a long
way back at high speed
• While holding down Bto move the hands at
high-speed, press Dto lock the high-speed
hand movement.
• To stop the hand movement, press any
button.
• Hand movement stops automatically if the hour
hand makes one full (12-hour) revolution.
• 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.
• To stop the hand movement, press any
button.
• Hand movement stops automatically if the hour
hand makes one full (12-hour) revolution.
When you want to do this:
Move the hand setting
forward 20 seconds
Perform this button operation:
• Press D.
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
6. 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 the Timekeeping Mode, press C.
World Time
The World Time Mode digitally displays the current time in
30 cities (29 time zones) around the world.
• Pressing Ain the World Time Mode causes the
applicable city code to appear on the digital display for
about two seconds.
• If the current time shown for a city is wrong, check your
Home City time settings and make the necessary
changes.
• The watch will perform a signal receive operation even if
it is in the World Time Mode when a calibration time is
reached. If this happens, the World Time Mode time
settings will be adjusted in accordance with the
Timekeeping Mode’s Home City time.
• All of the operations in this section are performed in the
World Time Mode, which you enter by pressing C.
City Code
Current time in the
selected city code
To view the time in another city
While in the World Time Mode, press Dto scroll through the city codes (time zones).
•For full information on city codes, see the “City Code Table”.
To toggle a city code time between StandardTime and Daylight SavingTime
1.In the World Time Mode, use D to display the city code
(time zone) whose Standard Time/Daylight SavingTime
setting you want to change.
• Pressing Ain the World Time Mode causes the
applicable city code to appear on the digital display for
about two seconds.
2.Hold down
A
to toggle Daylight SavingTime (DST
displayed) and Standard Time (DST not displayed).
• Note that you cannot use the World Time Mode to
change the DST setting of the Home City code you
currently have selected in theTimekeeping Mode.See
“Daylight Saving Time(DST)”for information about
turning the Home City code DST setting on and off.
DST indicator
• The DST indicator will appear on the display whenever
you display a city code for which Daylight SavingTime is
turned on.
• Note that the DST/Standard Time setting affects only the
currently displayed city code.Other city codes are not
affected.
Alarms
The Alarm Mode gives you a choice of four one-time
alarms and one snooze alarm. One of the one-time
alarms functions as a “target alarm,”which counts the time
remaining from the current Home City time to the target
alarm time.
You should also use the Alarm Mode to turn the Hourly
Time Signal on and off.
• There are five alarms named AL1 , AL2 , AL3 , TAL
(target alarm), and SNZ SNZ .You can configure as a
snooze alarm only. Alarms
AL1 , AL2 , AL3 , and
TAL can be used as one-time alarms only.
• All of the operations in this section are performed in the
Alarm Mode, which you enter by pressing C.
Alarm time
(Hour : Minutes)
Alarm name
To set an alarm time
1.In the Alarm Mode, use Dto scroll through the alarm
screens until the one whose time you want to set is
displayed.
2.After you select an alarm, hold down 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 Cto move the flashing between the hour and
minute settings.
4.While a setting is flashing, use D(+) and B(–) to
change it.
AL1 AL2 AL3
SIG SNG TAL
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Target Alarm Screen
• 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 A to exit the setting screen.
• With the target alarm ( TAL ), the time starts to
countdown as soon as you set the alarm time.
Alarm Operation
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, or until you turn the alarm off.
The target alarm counts the time remaining from the current Home City time to the
target alarm time.
• Pressing any button stops the alarm tone operation.
• 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 alarm setting screen
To test the alarm
In the Alarm Mode, hold down Dto sound the alarm.

—5 —
To select the alarm operation type
1.In the Alarm Mode, use Dto select the screen for the
alarm (AL1, AL2, AL3, TAL, or SNZ) whose
alarm type you want to select.
2.Press A to cycle through the available settings in the
sequence shown below.
•The alarm on indicator (ALM) or snooze on indicator
(SNZ) is displayed for each alarm (AL1, AL2, AL3,
TAL, SNZ) for which alarm on is selected.
•The snooze on indicator (SNZ) flashes during the 5-
minute interval between snooze alarms.
•The alarm on indicator (ALM) and snooze on indicator
(SNZ) are displayed in all modes.
•In all modes, the alarm on indicator (ALM) is shown for
any alarm (AL1, AL2, AL3, TAL) that is currently
turned on.
Snooze on
indicator
Alarm on
indicator
Alarm/
Snooze on
Alarm/
Snooze off
To turn the HourlyTime Signal on and off
1.In the Alarm Mode, use Dto select the HourlyTime
Signal (SIG).
2.Press A to toggle it on (SIG displayed) and off (SIG
not displayed).
•The Hourly Time Signal on indicator (SIG) is displayed
in all modes when the Hourly Time Signal is turned on.
Hourly time signal
on indicator
Data Memory
You can use the watch’s data memory to store e-mail
addresses, Web page URLs, and other text data.
•All of the operations in this section are performed in the
Data Memory Mode, which you enter by pressing C.
Data Memory Records
Each data memory record can contain up to 63
characters.Records are stored in memory in the
sequence they are created.
•The number of records you can store in data memory
depends on the number of characters that make up
each record. See “Data Memory Management”for more
information.
Record number
Text
To create a new data memory record
1.In the Data Memory Mode, press A and Dat the
same time to display the remaining memory screen.
•You do not have to perform the above step if the
remaining memory screen is already on the display.
•If 0% 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 appears on the
display, which indicates the setting screen.
3.Use Band Dto cycle through characters at the
current cursor location, and Cto move the cursor to
the right. See “Inputting Text”for more information.
•If memory becomes full while you are inputting text,
the cursor will jump to the first (leftmost) character of
the text when you press C, instead of advancing to
the right.
4.Press A to store your data and return to the data
memory record screen (without the cursor).
•The message SET appears for about two seconds,
followed by a data memory record screen, which shows
the text you just input, along with a record number
automatically assigned by the watch.
Record number
Text
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Cursor
To recall data memory records
1. In the Data Memory Mode, press Dto scroll forward through data memory records.
•Each press of Dadvances to the next record and shows its record number and
first three characters of its text.
•Pressing Dwhile the last record in memory is on the display changes to the
remaining memory screen. Pressing Dagain displays the first record.
2. Use A to scroll through the text, three characters at a time.
•An end mark indicates the end of the text.
First three characters
Each press of Ashows the next three characters.
End mark
Second three characters
To edit a data memory record
1. In the Data Memory Mode, display the record you want to edit.
2. Hold down A until the flashing cursor appears on the display.
3. Press Cto move the flashing to the character you want to change.
4. Use Dand Bto change the character.
5. After making the changes you want, press Ato store them and return to the data
memory record screen.
To delete a data memory record
1. In the Data Memory Mode, display the record 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 CLR appears to indicate that the record is being deleted. After the
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.
Time Recorder
The Time Recorder Mode lets you store up to 10 time
entries (month, day, hour, minutes, seconds) with the
touch of a button.One way you can use the Time
Recorder Mode is to record the start time and the end
time of a particular event.
•All of the operations in this section are performed in the
Time Recorder Mode, which you enter by pressing C
C
.
To record aTime Recorder time
1.Use Cto enter the Time Recorder Mode.
This displays theTime Recorder standby screen.
Standby Screen
Hour : Minutes Seconds
2.Press Dto record the current date and time (month,
day, hour, minutes, seconds).
•
•
The recorded time flashes for about two seconds and
then assigned the next available record number, in the
range of through . Next the time recorder standby
screen appears.
•A new time is recorded each time you press Dwhile
the standby screen is on the display.
•Records are assigned numbers sequentially from
through .
•Storing a new time record when there are already 10
records stored in memory automatically deletes record ,
shifts the remaining records upwards by 1, and stores
the new record as .
To recall Time Recorder times
1. In the Time Recorder Mode, press A to recall Time Recorder times.
2. Use Dto scroll through times stored in memory.
•Each press of Dscrolls through time records from higher numbered (newer)
records to lower numbered records.
• If you recorded a newTime Recorder time since you last entered the Time Recorder
Mode, the newest record appears first.If you have not recorded a new time, the
record you were viewing when you last viewed theTime Recorder times appears first.
Alternate at two-
second interval
Recorded time
(Month –Day)
Time record number
Recorded time
(Hour : Minutes Seconds)
To delete allTime Recorder times
In the Time Recorder Mode, press Aand Dat the same time to delete all Time
Recorder times.
Stopwatch
The stopwatch lets you measure elapsed time, split times,
and two finishes.
•The display range of the stopwatch is 99 minutes, 59.99
seconds.
•The stopwatch continues to run, restarting from zero
after it reaches its limit, until you stop it.
• Exiting the Stopwatch Mode while a split time is frozen
on the display clears the split time and returns to
elapsed time measurement.
•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 .
Seconds
Minutes
1/100 second
To measure times with the stopwatch
D
Start Stop
ElapsedTime
Re-start Clear
D
Stop
D
D
A
SplitTime
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.
Display time of
first runner.
Second runner
finishes. Display time of
second runner.
Backlight
The backlight uses an LED (light-emitting diode) and a
light guide panel that cause 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 in the dark.
•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 Bto illuminate the display for about
one second.
•The above operation turns on the backlight regardless of
the current auto light switch setting.
Auto light switch
on indicator
▲ ▲
▲
➤ ➤
➤
➤
➤ ➤
➤
➤
➤
➤
➤
➤

— 6 —
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.Note that this
watch features a “Full Auto LED Light,”so the auto light switch operates only when
available light is below a certain level.It does not turn on the backlight under bright
light.
Moving the watch to a position that is parallel to the ground and then tilting it
towards you more than 40 degrees causes the backlight to turn on.
Parallel to
ground More than 40°
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
surprise 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.
To turn the auto light switch on and off
In the Timekeeping Mode, hold down Bfor about two seconds to toggle the auto light
switch on (the auto light switch on indicator displayed) and off (the auto light switch on
indicator not displayed).
•The auto light switch on indicator is on the display in all modes while the auto light
switch is turned on.
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.The
illustration shown below shows how you should position the watch for charging.
Example: Orient the watch so its
face is pointing at a light source.
•Note that charging efficiency
drops when any part of the solar
cell is blocked by clothing, etc.
•The illustration shows how to
position a watch with a resin band.
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 bright light
whenever possible.
Solar cell
•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.
•All data stored in memory is deleted, and the current time and all other settings
return to their initial factory defaults whenever battery power drops to Level 4 and
when you have the battery replaced.
•Turn on the watch’s Power Saving function and keep it in an area normally exposed
to bright light when storing it for long periods.This helps to keep the rechargeable
battery from going dead.
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, disabled.
Battery Power Indicator
The battery power indicator on the display shows you the current status of the
rechargeable battery’s power.
Level
1
2
3
4
Battery Power
Indicator
Battery power indicator
Hi Mid Low
Hi Mid Low
Hi Mid Low C
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Hi Mid Low
•The flashing CHARGE indicator (
C
) at Level 3 tells you that battery power is very
low, and that exposure to bright light for charging is required as soon as possible.
•At Level 4, all functions are disabled and settings return to their initial factory
defaults.Functions are enabled once again after the rechargeable battery is
charged, but you need to set the time and date, after the battery reaches Level 3
(indicated by flashing CHARGE indicator (
C
) ) from Level 4.You will not be able to
configure any of the other settings until the battery reaches Level 2 (no CHARGE
indicator) after dropping to Level 4.
•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 higher than
the actual 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 (
R
) appears on the display and the following operations become disabled
until battery power recovers.
Backlight
Beeper tone
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.
Also note that allowing the watch to become very hot can cause its liquid crystal
display to black out.The appearance of the LCD should become normal again when
the watch returns to a lower temperature.
Warning!
Leaving the watch in bright light to charge its rechargeable battery can cause it
to become quite hot.Take care when handling the watch to avoid burn injury.
The watch can become particularly hot when exposed to the following
conditions for long periods.
•On the dashboard of a car parked in direct sunlight
•Too close to an incandescent lamp
•Under direct sunlight
Charging Guide
After a full charge, timekeeping remains enabled for up to about 5 months, while the
watch is used under the conditions described below.
Operating Conditions
• Watch is not exposed to light
• 1 backlight operation (1.5 seconds) per day
• 10 seconds of alarm operation per day
• 5 time calibration signal receptions per day
•Stable operation is promoted by frequent charging.
RecoveryTimes
The table below shows the amount exposure that is required to take the battery from
one level to the next.
Exposure Level (Brightness)
Outdoor Sunlight (50,000 lux)
Sunlight Through a Window (10,000 lux)
DaylightThrough a Window on a Cloudy Day
(5,000 lux)
Indoor Fluorescent Lighting (500 lux)
Approximate ExposureTime
5 minutes
24 minutes
48 minutes
8 hours
ChargeTimes
Exposing the watch to light for the periods shown below each day restores the power
used by the above operating conditions.
13 hours
66 hours
4 hours
18 hours
–––
–––
The above exposure time values are all for reference only. Actual required exposure
times depend on lighting conditions.
Exposure Level
(Brightness)
Outdoor Sunlight (50,000 lux)
Sunlight Through a Window
(10,000 lux)
Daylight Through a Window
on a Cloudy Day (5,000 lux)
Indoor Fluorescent Lighting
(500 lux)
Approximate ExposureTime
Level 4 Level 3 Level 2 Level 1
▲ ▲ ▲
1 hour
3 hours
5 hours
45 hours
▲
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.
Power Saving Function
When turned on, the Power Saving function automatically
enters a sleep state whenever the watch is left in an area
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 state.
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Power Saving
indicator
The sleep state is indicated by a blank screen with the Power Saving indicator (
PS
)
flashing on it.
•
Wearing the watch inside the sleeve of clothing can cause it to enter the sleep state.
•
• Even when the watch is in the sleep state, digital-analog time coordination and auto
signal receive are both performed.
Approximate Period
in sleep state
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
To recover from the sleep state
Perform any one of the following operations.
•Move the watch to a well-lit area.
•Press any button.
•Angle the watch towards your face for reading.

—7 —
To turn Power Saving on and off
1.In the Timekeeping Mode, hold down A until the city
code starts to flash, which indicates the setting screen.
•The second hand will move at high speed to the 12
o’clock position, where it will stop.
2.Press Aagain.
3.Press Cseven times until the Power Saving on/off
screen appears.
4.Press Dto toggle Power Saving on (
ON
) and off
(
OF
).
5.Press A to exit the setting screen.
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•The second hand will advance at high speed to the
correct position in accordance with the digital time
seconds count, and resume normal movement from
there.
•The Power Saving indicator (
PS
) is on the display in all
modes while the Power Saving is turned on.
Auto Return Features
•If you leave the watch in the Alarm, Data Memory, or Hand Setting Mode for two or
three minutes without performing any operation, it automatically returns to the
Timekeeping Mode.
•If you leave the watch with a flashing setting or cursor on the display for two or three
minutes without performing any operation, the watch automatically exits the setting
screen.
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
When you enter the World Time, Alarm, or Data Memory Mode, the data you were
viewing when you last exited the mode appears first.
Time Calibration Signal Reception Precautions
•Strong electrostatic charge can result in the wrong time being set.
•Even when the watch is within the reception range of the transmitter, 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.
•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.
•Even if the time calibration signal is received properly, certain conditions can cause
the time setting to be off by up to one second.
•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, 2099. Setting of the date by the time
calibration signal cannot be performed starting from January 1, 2100.
•This watch can receive signals that differentiate between leap years and non-leap
years.
•Though this watch is designed to receive both time data (hour, minutes, seconds)
and date data (year, month, day), certain signal conditions can limit reception to time
data only.
•When all five auto receptions are successful (0:00 a.m., 1:00 a.m., 2:00 a.m., 3:00
a.m., and 4:00 a.m.), 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.
•Normally, the signal reception date shown by the Last Signal screen is the date data
included in the received time calibration signal.When only time data is received,
however, the Last Signal screen shows the date as kept in theTimekeeping Mode at
the time of 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.
•If you have problems with proper time calibration signal reception or if the time
setting is wrong after signal reception, check your current city code, DST (summer
time), and auto receive settings.The following are the initial factory defaults for these
settings.
Setting
City code
DST (summer time)
Auto receive
Initial Factory Default
BER (Berlin)
A (Auto switching)
DST
ON R/C (Auto receive)
Timekeeping
•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.
•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 2099.
•The watch’s built-in full automatic calendar 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 or when battery power drops to
Level 4.
•The current time for all city codes in the Timekeeping Mode and World Time Mode is
calculated in accordance with the Greenwich Mean Time (GMT) differential for each
city, based on your Home City time setting.
•GMT differential is calculated by this watch based on Universal Time Coordinated
(UTC*) data.
* The letters “UTC”stands for “Universal Time Coordinated,”which is the world-wide scientific
standard of timekeeping. It is based upon carefully maintained atomic (cesium) clocks that
keep time accurately to within microseconds. Leap seconds are added or subtracted as
necessary to keep UTC in sync with the Earth’s rotation. The reference point for UTC is
Greenwich, England.
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 on the display for times in the
range of noon to 11:59 p.m. and no 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.The
indicator 24 indicates the 24-hour format.
InputtingText
The following describes how to input text in the Data Memory Mode.
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.
Press D.
a to z
(lower-case)
(space)
*
to +
(symbol)
0 to 9
(number) A
to Z
(upper-case)
Press B.
Data Memory
Input Screen
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Cursor
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.
HONOLULU
ANCHORAGE
LOS ANGELES
DENVER
CHICAGO
NEWYORK
CARACAS
RIO DE JANEIRO
LONDON
PARIS
BERLIN
City CodeTable
Auto light switch precautions
•Wearing the watch on the inside of your wrist, as well as 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.
•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.
More than 15 degrees
too high
•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.
City City GMT Other major cities in same time zone
Code
Differential
–––
HNL
ANC
LAX
DEN
CHI
NYC
CCS
RIO
–––
–––
GMT
LON
PAR
BER
PAGO PAGO
PAPEETE
NOME
SAN FRANCISCO, LASVEGAS,VANCOUVER,
SEATTLE, DAWSON CITY
EL PASO, EDMONTON
HOUSTON, DALLAS/FORT WORTH,
NEW ORLEANS, MEXICO CITY, WINNIPEG
MONTREAL, DETROIT, MIAMI, BOSTON,
PANAMA CITY, HAVANA, LIMA, BOGOTA
LA PAZ, SANTIAGO, PORT OF SPAIN
SAO PAULO, BUENOS AIRES, BRASILIA,
MONTEVIDEO
PRAIA
DUBLIN, LISBON, CASABLANCA, DAKAR,
ABIDJAN
MILAN, ROME, MADRID, AMSTERDAM, ALGIERS,
HAMBURG, FRANKFURT, VIENNA, STOCKHOLM
•Based on data as of June 2002.
ATHENS
CAIRO
JERUSALEM
JEDDAH
TEHRAN
DUBAI
KABUL
KARACHI
DELHI
DHAKA
YANGON
BANGKOK
HONG KONG
TOKYO
SEOUL
ADELAIDE
SYDNEY
NOUMEA
WELLINGTON
+2
+3
+3.5
+4
+4.5
+5
+5.5
+6
+6.5
+7
+8
+9
+9.5
+10
+11
+12
HELSINKI, ISTANBUL, BEIRUT, DAMASCUS,
CAPE TOWN
KUWAIT, RIYADH, ADEN, ADDIS ABABA, NAIROBI,
MOSCOW
SHIRAZ
ABU DHABI, MUSCAT
MALE
MUMBAI, KOLKATA
COLOMBO
JAKARTA, PHNOM PENH, HANOI, VIENTIANE
SINGAPORE, KUALA LUMPUR, BEIJING,TAIPEI,
MANILA, PERTH, ULAANBAATAR
PYONGYANG
DARWIN
MELBOURNE, GUAM, RABAUL
PORTVILA
CHRISTCHURCH, NADI, NAURU ISLAND
ATH
CAI
JRS
JED
THR
DXB
KBL
KHI
DEL
DAC
RGN
BKK
HKG
TYO
SEL
ADL
SYD
NOU
WLG
–11
–10
–9
–8
–7
–6
–5
–4
–3
–2
–1
+0
+1
•See the “Character List”for information about the
characters you can input.
Data Memory Management
Data memory can hold up to 315 characters total, while each record can contain up to
63 characters.This means that 40 records can be stored in data memory when each
record contains seven characters of text or less.
Backlight Precautions
•The illumination provided by the backlight may be hard to see when viewed under
direct sunlight.
•The backlight automatically stops illuminating whenever an alarm sounds.
•Frequent use of the backlight shortens the battery life.
±

— 8 —
(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
*
–
–
@
~
/
?
#
!
%
.
:
,
,
&
=
a
b
c
e
f
g
h
i
j
k
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m
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o
p
q
r
s
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u
v
w
x
y
z
*
-
_
@
/
#
!
%
.
:
'
,
&
=
e
X
Character List
d
–
+
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
-
+
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

— 9 —
3. DRAWINGS: MODULE QW-2727/2730
3-1. LCD DIAGRAM: MODULE QW-2727/2730
SEG.COM. SEG.COM.
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
L31
LC1 LC2 LC3 LC4 LC5 L30
x22y4
x21y4
x20y4
x19y4
x18y4
x17y4
x16y4
x15y4
x14y4
x13y4
x12y4
snz
x10y4
x9y4
x8y4
x11y4
x6y4
x5y4
high
x3y4
x2y4
p
x0y4
mid
dst
x22y0
x21y0
x20y0
x19y0
x18y0
x17y0
x16y0
x15y0
x14y0
x13y0
x12y0
x11y0
x10y0
x9y0
x22y1
x21y1
x20y1
x19y1
x18y1
x17y1
x16y1
x15y1
x14y1
x13y1
x12y1
x11y1
x10y1
x9y1
x8y0
sig
x6y0
x5y0
alm
x3y0
x2y0
24
x0y0
a_light
rc0
x8y1
x7y0
x6y1
x5y1
x4y0
x3y1
x2y1
x1y0
x0y1
col0
rc1
LC1 LC2 LC3 LC4 LC5
x22y2
x21y2
x20y2
x19y2
x18y2
x17y2
x16y2
x15y2
x14y2
x13y2
x12y2
x11y2
x10y2
x9y2
x8y2
x7y2
x6y2
x5y2
x4y2
x3y2
x2y2
x1y2
x0y2
hyp
rc2
x22y3
x21y3
x20y3
x19y3
x18y3
x17y3
x16y3
x15y3
x14y3
x13y3
x12y3
x11y3
x10y3
x9y3
x8y3
x7y4
x6y3
x5y3
x4y4
x3y3
x2y3
x1y4
x0y3
col1
r
low/c
ps
a_light
y4
high clow r ps
rc2
rc1
rc0
dstsnzsigalm
y0
mid
p
24
x3 x4 x5x0 x1 x2
hyp
col1
col0
x6 x12 x13 x17 x18
y0
y4
x22
L30 L29 L28 L27 L26 L25 L24 L23 L22 L21 L20 L19 L18 L17 L16 L15 L14 L13 L12 L11 L10
L9 L8 L7 L6 L5 L4
L31 LC1 LC2 LC3 LC4 LC5

—10 —
3-2. CIRCUIT DIAGRAM: MODULE QW-2727
LSI
TOTAL 106PINS
BONDING 84PINS
GND VDD2
BAT
Di2
VCH VDD3 VC1 VC2
C3
C2
C5
XTB
L4 - - - L31 LC1 - - - LC5
LCD ( 2.8V 1/3b 1/5d )
LD1
S2
VDD1
C1
BD
C8
LL1
Tr1
XT
T1 T2 T3 KI1 KI2 KI3 KI4 KI5 KI6 KI7 KI8 KI9
S1
SCR SCIN
RP1RP2
Cp
PZ
VDSP
C4
VC3 VC4
Di1
VHF
C6
SDO SCK CSB
AC T4
KC4 KC3 KC2 KC1
R1
R2
VSC
C7
SCC9
✽
1
R3
✽
1
Z
VPM
R1
Rb
GNDB
✽
7
S4 S3
SDI
✽
1
N1 N2
✽
8
Creg
IN1 IN2 PON OUT2
REG
OUT1
AGC
FIL1 FIL2
TCO
REC DEC1 GND
HOLD
VCC
1 2 3
16 15 14
4 5 6 7 8
13 12 11 10
9
Cxt
Crl1
Rxt2
Ccp9
Cf12 Cagc
Cbat
Rbat
Xtal2
IC
ANT
Rant2
Cf13
Rcp
Rxt3
Xtal3
Crl2
Crl3
Crh3
Crh2
Crh1
Rant1
Rs Rd
Cc
FET
Rpd
Rant3
✽
14
DEC2
SK
KS
✽
2
✽
6
✽
6
✽
4
✽
4
✽
4
✽
3
✽
3
✽
3
✽
3
✽
3
✽
5
✽
3
✽
10
✽
11
✽
12
✽
3
An.B1
Tr2
LED2LED1
R2 R3
LED3
R4
✽
2
✽
2
L32 - - L36
L37 - - - L55
L1 L2 L3
An.B2
✽
3
✽
3
✽
9
✽
9
✽
9
✽
1
✽
13
✽
14
✽
14
✽
14
✽
14
✽
14
✽
14
✽
14
✽
14
✽
14
✽
14
RPM Tr3
✽
14
✽
14
✽ 1. No bonding ✽ 2. GND-KI6: Open (No Soldering) GND-KI7: Open (No Soldering) GND-KI8: Short (Soldering) ✽3. Latch type key ✽ 4. Short (Soldering) (R trimming) ✽ 5. Inclination sensor ✽ 6. Short (Soldering) (N trimming) ✽ 7. GNDB is used for the bias on the back of the tip.
✽ 8. L28~L30 are used as static drive pins. ✽ 9. Motor drive pins are used in this module (01, 02, 03). ✽ 10. Normal Low ✽ 11. LD2 (Normal Low) is used in this module. ✽ 12. LD3 (Normal High) is used in this module. ✽ 13. Not shorted (Soldering) in this module. ✽ 14. Rant1, Rant3, FET, Rs, Rd, Cc, Crl1, Crl2, Crl3, Rxt3, Xtal3, Rant2, and Rpd are not used in this module.
CT Xtal

—11 —
MODULE QW-2730
LSI
TOTAL 106PINS
BONDING 84PINS
GND VDD2
BAT
VCH VDD3 VC1 VC2
C3
C2
C5
XTB
Xtal
L4 - - - L31 LC1 - - - LC5
CT
LCD ( 2.8V 1/3b 1/5d )
LD1
S2
VDD1
C1
BD
C8
LL1
Tr1
XT
T1 T2 T3 KI1 KI2 KI3 KI4 KI5 KI6 KI7 KI8 KI9
S1
SCR SCIN
RP1RP2
Cp
PZ
VDSP
C4
VC3 VC4
Di1
VHF
C6
SDO SCK CSB
AC T4
KC4 KC3 KC2 KC1
R1
R2
VSC
C7
SCC9
✽
1
R3
✽
1
Z
VPM
Di2 R1
Rb
GNDB
✽
7
S4 S3
SDI
✽
1
N1 N2
✽
8
Creg
IN1 IN2 PON OUT2
REG
OUT1
AGC
FIL1 FIL2
TCO
REC DEC1 GND
HOLD
VCC
1 2 3
16 15 14
4 5 6 7 8
13 12 11 10
9
Cxt
Crl1
Rxt2
Ccp9
Cf12 Cagc
Cbat
Rbat
Xtal2
IC
ANT
Rant2
Cf13
Rcp
Rxt3
Xtal3
Crl2
Crl3
Crh3
Crh2
Crh1
Rant1
Rs Rd
Cc
FET
Rpd
Rant3
✽
14
DEC2
SK
KS
✽
2
✽ 6 ✽ 6 ✽ 4 ✽ 4 ✽ 4
✽ 5
✽ 10
✽ 11 ✽ 12
An.B1
Tr2
LED2LED1
R2 R3
LED3
R4
✽
2
✽ 2
L32 - - L36
L37 - - - L55
L1 L2 L3
An.B2
✽
9✽ 9✽ 9✽ 1
✽3
✽ 13
RPM Tr3
✽
14
✽
14
✽
14
✽3 ✽3 ✽3 ✽3 ✽3 ✽3 ✽3 ✽3 ✽3
✽ 1. No bonding ✽ 2. GND-KI6: Open (No Soldering) GND-KI7: Open (No Soldering) GND-KI8: Open (No Soldering) ✽3. Latch type key ✽ 4. Short (Soldering) (R trimming) ✽ 5. Inclination sensor ✽ 6. Short (Soldering) (N trimming) ✽ 7. GNDB is used for the bias on the back of the tip.
✽ 8. L28~L30 are used as static drive pins. ✽ 9. Motor drive pins are used in this module (01, 02, 03). ✽ 10. Normal Low ✽ 11. LD2 (Normal Low) is used in this module. ✽ 12. LD3 (Normal High) is used in this module. ✽ 13. Short (Soldering) in this module. Short (Soldering) after tuning ANT when mountingANT tuning condensor on the PCB. ✽ 14. Rant1, Rant2, Rant3, and Rpd are not used in this module.

— 12 —
3-3. CHECKING TERMINALS AND COMPONENTS: MODULE QW-2727
SCINVSC
GS
DD
SGND
DD
2
GND
LED2
GND
K14
R
GND
KI8GNDKI6GND
VCH
SDO
GND
VDSP
GND
G
GND
K11
VDD2
VSC
GND
VSC
VDD2 GND GND
N1
N2
GND
SCIN
VSC
GND
GND
1416
LED2
R2
Rcp
Rcp 9
GND
R1
GND
3
VDD2
R3
SCIN
GND
VHF GND
VDD3
L1
L2
GND
13 12
GND KI7
VDD1
GND
XTB XT
GND
VDD2
KI3
VDD2
LED1
KI2
GND
VDD2
LED3
GND
GNDB
SCR
SCIN
GND
7
Xtal3
Xtal3
K14
KI3
KI2
LED1 R
LED3
RAC
R4 VPM
L3
L2 L1 VDD2
VDD2 G
K14
LD1
R
VSC
R4
R
LD1
GND
KC2GND
LL1 LL1 GND R5 BD
R5
R5
LL1
VDD2
VDD2
GND
XT
VC1
VC2
VC4
GND
VC3 VC1 GND
KI9
KI9
VDSP
4Xtal2
K11
Xtal2
GND
KI5
KI5GND
VCH
S
1
S
1
GND
7
S
S
11
22
1
2
1
1
2
1616
1
2
7
5
4
2
1
S
9
KC3
KI9
12 13 14
KC4
16 1
2 3 4 5
GND
7 8
LL1 GND
GND
3
Capacitor/Chip
Cbat Capacitor/Chip
Cxt
Transistor
Tr3
Transistor
Tr1
Transistor
Rcp Transistor
Rbat
Transistor
Tr2 Diode
Di2
LED3
Diode
Di1
Resistor/Chip
RPM
Resistor/Chip
RP2
Resistor/Chip
RP1
Coil
LL1
3. PCB ASS'Y
(7640 6322)
4. Capacitor/Trimmer
(1001 0950)
Xtal1
5. Oscillator/
Crystal
(7110 0715)
Xtal2
Oscillator/Crystal
6. Sensor/Tilt
(7105 5275)
Resistor/Chip
Rxt2
Varistor
Z
Resistor/Chip
R2
Resistor/Chip
Rb
Resistor/Chip
R3
Resistor/
Chip
R1
Resistor/Chip
R4
Cmos
IC
Capacitor/Chip
C9
Capacitor/Chip
C4
Capacitor/Chip
C7
Capacitor/Chip
Creg
Capacitor/Chip
Cagc
Capacitor/Chip
Ccp9
Capacitor/Chip
Cf13
Capacitor/Chip
Cf12
Capacitor/Chip
C5
Capacitor/Chip
C6 Capacitor/Chip
C2 Capacitor/Chip
C8
Capacitor/Chip
C1
Capacitor/Chip
C3
Capacitor/Chip
Cp
CT
Top view of P.C.B. ass'y Bottom view of P.C.B. ass'y

—13 —
3-4. N1, N2, R1 ~ R3 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.
GND
LED2
GND
2
D
K14 K14
R
D
GND
S
GND
D
D
SG
KI8GNDKI6GND
VCH
SDO
GND
VDSP
GND
G
GND
K11
VDD2
VSC
GND
VSC
VDD2 GND GND
N1
N2
GND
SCIN
VSC
GND
GND
1416
LED2
R2
Rcp
Rcp 9
GND
R1
GND
3
VDD2
R3
SCIN
GND
VHF GND
VDD3
L1
L2
GND
13 12
GND KI7
VDD1
GND
XTB XT
GND
VDD2
KI3 KI3
VDD2
LED1
KI2
GND
VDD2
LED3
GND
GNDB
SCR
SCIN
GND
2
KI2
LED1 R
LED3
RAC
R4 VPM
L3
L2 L1 VDD2
VDD2 G
K14
LD1
R
VSC
R4
R
LD1
GND
KC2GND
LL1 LL1 GND R5 BD
R5
R5
LL1
VDD2
VDD2
GND
XT
VC1
VC2
VC4
GND
VC3
7
VC1 GND
KI9
KI9
VDSP
4Xtal2
K11
Xtal2
GND
KI5
KI5GND
VCH
S
1
S
1
GND
7
S
S
11
22
1
2
1
1
2
1616
1
2
7
5
4
Xtal3
Xtal3
2
1
S
9
KC3
KI9
12 13 14
KC4
16 1
2 3 4 5
GND
7 8
LL1 GND
GND
3
Capacitor/Chip
Cbat Capacitor/Chip
Cxt
Transistor
Tr3
Transistor
Tr1
Transistor
FET
Transistor
Rcp Transistor
Rbat
Transistor
Tr2 Diode
Di2
LED3
Diode
Di1
Resistor/Chip
RPM
Resistor/Chip
RP2
Resistor/
Chip
RP1
Coil
LL1
3. PCB ASS'Y
(7640 6222)
4. Capacitor/Trimmer
(1001 0950)
Xtal
5. Oscillator/
Crystal
(7110 0715)
Xtal3
Oscillator/Crystal
Xtal2
Oscillator/Crystal
6. Sensor/Tilt (7105 5275)
Resistor/Chip
Rxt3
Resistor/
Chip
Rxt2
Varistor
Z
Resistor/Chip
Rd
Resistor/Chip
Rb
Resistor/Chip
R2
Resistor/Chip
Rb
Resistor/Chip
R3 Resistor/
Chip
R1
Resistor/Chip
R4
Detection IC
IC
Capacitor/Chip
C9
Capacitor/
Chip
C4
Capacitor/Chip
C7
Capacitor/Chip
Creg
Capacitor/Chip
Cagc
Capacitor/Chip
Ccp9
Capacitor/Chip
Cf13
Capacitor/Chip
Cf12
Capacitor/Chip
C5
Capacitor/Chip
C6 Capacitor/Chip
C2
Capacitor/Chip
C8
Capacitor/Chip
C1
Capacitor/Chip
C3
Capacitor/Chip
Cp
Capacitor/Chip
Cc
CT
Top view of P.C.B. ass'y Bottom view of P.C.B. ass'y
MODULE QW-2730

— 14 —
4. EXPLODED VIEW: MODULE QW-2727/2730
24 (1010 6509)
17 (1010 6516)
19 (1010 6519)
1 (1010 3493)
28 (7227 0294)
26 (7201 9249)
22 (1013 4221)
16 (1010 6512)
11 (1002 7903)
15 (1010 6521)
3a (7640 6322)
3b (7640 6222)
13 (1011 7191)
12 (7231 1777)
23 (1010 6520)
7 (7640 6260)
2 (1010 6522)
8 (1006 5657)
Battery Storage (CTL1616)
18 (1010 6517)
14 (1010 6506)
27 (1010 6508)
25 (1010 6510)
29 (7235 0913)
21 (1012 3230)
PCB ass'y

— 15 —
ANALOG BLOCK: MODULE QW-2727/2730
20 (7228 0511)
10 (1010 3618)
9 (1010 3617)

5. PARTS LIST: MODULE QW-2727/2730
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
1010 9022 MODULE/WITH MOVEMENT QW-2727YCSA-01 WVA-400D-1A1V/1A2V 1 A
1010 5754 MODULE/WITH MOVEMENT QW-2730YCSA-01 WVA-400DJ-1A1/1A2/9A 1 A
WVA-400TDJ-1A/9A
1 1010 3493 LCD C2730-01 QW-2727YCSA/2730YCSA Common 1 A
2 1010 6522 LED LNJ411K830CS QW-2727YCSA/2730YCSA Common 2 A
3a 7640 6322 PCB ASS'Y Q256086*1TK QW-2727YCSA-01 1 A
3b 7640 6222 PCB ASS'Y Q255907*1TK QW-2730YCSA-01 1 A
4 1001 0950 CAPACITOR/TRIMMER CTZ2E-30C-W2-P QW-2727YCSA/2730YCSA Common 1 B
57110 0715 OSCILLATOR/CRYSTAL DT-26SF QW-2727YCSA/2730YCSA Common 1 A
6 7105 5275 SENSOR/TILT TS-2418-P QW-2727YCSA/2730YCSA Common 1 B
7 7640 6260 ANALOG BLOCK QW-2730MV-82TK QW-2727YCSA/2730YCSA Common 1 A
8 1006 5657 BATTERY/STORAGE CTL1616 QW-2727YCSA/2730YCSA Common 1 B
9 1010 3617 COIL ASS'Y Q371418*1 QW-2727YCSA/2730YCSA Common 1 A
10 1010 3618 COIL ASS'Y Q371419*1 QW-2727YCSA/2730YCSA Common 1 A
11 1002 7903 CONTACT/BATTERY
(
-
)
Q39603B-1 QW-2727YCSA/2730YCSA Common 1 C
12 7231 1777 HOLDER 1381 Q456843-1 QW-2727YCSA/2730YCSA Common 1 C
13 1011 7191 HOLDER/BATTERY Q255819B-2 QW-2727YCSA/2730YCSA Common 1 C
14 1010 6506 HOLDER/HOUR WHEEL Q372164-1 QW-2727YCSA/2730YCSA Common 1 C
15 1010 6521 INTERCONNECTOR Q470505-1 QW-2727YCSA/2730YCSA Common 1 C
16 1010 6512 LABEL Q471007-1 QW-2727YCSA/2730YCSA Common 1 C
17 1010 6516 LIGHT GUIDE Q372165-1 QW-2727YCSA/2730YCSA Common 1 C
18 1010 6517 LIGHT GUIDE Q372166-1 QW-2727YCSA/2730YCSA Common 1 C
19 1010 6519 REFLECTOR Q470501A-1 QW-2727YCSA/2730YCSA Common 1 C
20 7228 0511 SCREW Q422638-1 QW-2727YCSA/2730YCSA Common 3 B
21 1012 3230 SCREW RJQ513792-001V01 QW-2727YCSA/2730YCSA Common 3 B
22 1013 4221 SHEET/INSULATION RJQ515739-001V01 QW-2727YCSA/2730YCSA Common 1 C
23 1010 6520 SOLAR CELL BCS2926D5 QW-2727YCSA/2730YCSA Common 1 C
24 1010 6509 SPRING/COIL Q470503-1 QW-2727YCSA/2730YCSA Common 3 B
25 1010 6510 SPRING/COIL Q470504-1 QW-2727YCSA/2730YCSA Common 4 B
26 7201 9249 SPRING/COIL 675-3 Q413389A-1 QW-2727YCSA/2730YCSA Common 1 B
27 1010 6508 SPRING/LEAF Q372167-1 QW-2727YCSA/2730YCSA Common 1 C
28 7227 0294 WASHER/745 Q436294A-1 QW-2727YCSA/2730YCSA Common 1 C
29 7235 0913 WHEEL/HOUR 2315 Q364087B-1 QW-2727YCSA/2730YCSA Common 1 B
For the
p
rices and minimum order/su
pp
l
y
q
uantities of the above
p
arts, refer to the Parts Price List P.P.L.-595.
Notes: Q - Used quantity
R - Rank — 16 —

— 17 —
6. PRECAUTIONS FOR REPAIR: MODULE QW-2727/2730
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 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-2727/2730
A
C
B
D

— 18 —
ALM SIG SNZ DST
ALM SIG SNZ DST
6-3. SOLAR CELL-PCB ASS'Y CONTACT CHECKING
Check a Solar cell and PCB ass'y are contacted correctly by contact spring, when a module is
disassembled.
1. To enter TEST mode.
1) While pressing Dbutton, press Aand Bbuttons at the normal timekeeping mode.
2. Check a Solar cell and PCB ass'y contact in the following order.
1) Display side up and place the watch on the desk.
2) Check the display indicates as figure 2.
3) Display side down and place the watch on the desk more than two seconds.
Or go to a dark room and place the watch more than two seconds.
4) Check the display indicates as figure 3.
If "88" is not appeared on the display, disassemble again the module and check the contact spring
between the Solar cell and PCB.
3. To exit from TEST mode
Press any button.
6-4. HOW TO CHECK TILT SENSOR
1) Press A, Band Cbuttons at the normal timekeeping mode.
2) Check the display indicates as figure 4.
3) Tilt the watch towards you more than 40 degrees.
4) Check the display indicates as figure 5.
Figure 4 Figure 5
Figure 3
Figure 1 Figure 2
Press D, Aand Bbuttons
Tilt the watch towards you
more than 40°More than 40°
D
B
C
A
Place the watch in a dark
room more than two seconds.
Appear "88" on display.
Appear "TLT" on display. Appear "88" on display.
ALM SIG SNZ DST
ALM SIG SNZ DST
ALM SIG SNZ DST