Casio G-SHOCK GW-1501B Troubleshooting guide

SERVICE MANUAL
& PARTS LIST
(WITHOUT PRICE)
QW-3765
MODULE NO.
R
REF. NO. S/M-880
FEB. 2005
GW-1501B
GW-1501S
Ver.1 : May. 2006

CONTENTS
Page
1. SPECIFICATIONS: MODULE QW-3765 .................................................... 1
2. OPERATION CHART: MODULE QW-3765 ............................................... 2
3. DRAWINGS: MODULE QW-3765
3-1. LCD DIAGRAM ............................................................................................. 6
3-2. CIRCUIT DIAGRAM ...................................................................................... 7
3-3. CHECKING TERMINALS AND COMPONENTS ..........................................8
4. EXPLODED VIEW: MODULE QW-3765 .................................................... 9
5. PARTS LIST: MODULE QW-3765 ............................................................ 10
6. PRECAUTIONS FOR REPAIR: MODULE QW-3765
6-1. AC (ALL CLEAR) AND REMOVING OF MODULE ..................................... 11
6-2. ACCURACY CHECKING .............................................................................11
6-3. SOLAR CELL-PCB ASS'Y CONTACT CHECKING....................................12
6-4. HOW TO CHECK TILT SENSOR.................................................................12

— 1 —
1. SPECIFICATIONS: MODULE QW-3765
Battery CTL1616 (Storage battery)
Note: Use CTL1616 only. Other storage battery or CR1616 can cause
damage to the watch.
Battery life Approx. 10 months (from full charged condition)
Current consumption 0.5 µA maximum
Alarm system Piezo plate on Cover/Back
Accuracy ±15 sec./month
Accuracy setting system Trimmer capacitor
Accuracy checking See page 11
Functions • Shock resistant (G-SHOCK)
• Super Illuminator
Full auto LED light
• Solar powered
• World time
29 time zones (30 cities), city code display, daylight saving on/off
• 1/100-second stopwatch
Measuring capacity: 59'59.99"
Measuring modes: Elapsed time, split time, 1st-2nd place times
• Daily alarm
• Hourly time signal
• Battery power indicator
• Power Saving (Turns off the display when the watch is left in the dark)
• Auto-calendar (to year 2099)
• 12/24-hour format
• Regular timekeeping
Analog: 2 hands (hour, minutes (hand moves every 20 seconds))
Digital: Hour, minutes, seconds, pm, month, date, day
Item Detail

— 2 —
2. OPERATION CHART: MODULE QW-3765
Getting Acquainted
Congratulations upon your selection of this CASIO watch.To get the most out of your
purchase, be sure to read this manual carefully and keep it on hand for later reference
when necessary.
Keep the watch exposed to bright light
The electricity generated by the solar cell of the watch is
stored by a built-in battery. Leaving or using the watch
where it is not exposed to light causes the battery to run
down.Make sure the watch is exposed to light as much as
possible.
•When you are not wearing the watch on your wrist,
position the face so it is pointed at a source of bright
light.
•You should try to keep the watch outside of your sleeve
as much as possible. Even if the face of the watch is
only partially blocked from light, charging will be
significantly reduced.
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Bright Light
Solar cell
•The watch continues to operate, even when it is not exposed to light.Leaving the
watch in the dark can cause the battery to run down, which will cause some watch
functions to be disabled.If the battery goes dead, you will have to re-configure watch
settings after recharging.To ensure normal watch operation, be sure to keep it
exposed to light as much as possible.
Bright Light
Electrical
energy
All
functions
enabled
LEVEL 1
LEVEL 2
LEVEL 3
Charge
Solar cell
(Converts light to
electrical power.)
Rechargeable battery
LEVEL 1
LEVEL 2
LEVEL 3
Some
functions
disabled
Dis-
charge
Battery charges in the light. Battery discharges in the dark.
•The actual level at which some functions are disabled depends on the watch model.
•Frequent display illumination can quickly run down the battery and require charging.
The following guidelines give an idea of the charging time required to recover from a
single illumination operation.
Approximately 5 minutes exposure to bright sunlight coming in through a window
Approximately 50 minutes exposure to indoor fluorescent lighting
•Be sure to read“Power Supply” for important information you need to know
when exposing the watch to bright light.
If the display of the watch is blank...
If the display of the watch is blank, it means that the watch’s Power Saving function
has turned off the display to conserve power.
•See“Power Saving” for more information.
Digital display
Hour hand Minute hand
AboutThis Manual
•Button operations are indicated using the letters shown
in the illustration.
•Most of the display examples in this manual show only
the digital display, without the analog hands.
•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.
General Guide
•Press Cto change from mode to mode.
•In any mode, press Bto illuminate the face of the watch.
•The Battery Level Screen shows the current battery level. See “Battery Power
Levels”for more information.
NYC
STW
▲
▲
▲
World Time Mode Alarm Mode
Stopwatch Mode
▲
Timekeeping Mode Press C.
▲
▲
Battery Level Screen
Hand Setting Mode
Timekeeping
Use the Timekeeping Mode to set and view the current time and date.
•In the Timekeeping Mode, press Ato cycle through the digital time screens as
shown below.
Time
SecondsDay of theWeek
▲
Press A.
Hour : Minutes
PM indicator
▲
▲
▲
Date
Month. Day
Setting the DigitalTime and Date
This watch is preset with a number of city codes, each of which represents the time
zone where that city is located.When setting the digital time, it is important that you
select the correct city code for your Home City (the city where you normally use the
watch).If your location is not included in the preset city codes, select the preset city
code that is in the same time zone as your location.
•Note that all of the times for theWorld Time Mode city codes are displayed in
accordance with the digital time and date settings you configure in theTimekeeping
Mode.
To set the digital time and date
1. In the Timekeeping Mode, hold down Auntil the city
code starts to flash, which indicates the setting screen.
2.Press Dto select the city code you want.
•Make sure you select your Home City code before
changing any other setting.
•See “City Code Table”for a complete list of available
city codes.
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3. Press Cto move the flashing in the sequence shown below to select other settings.
Seconds Hour
Minutes
12/24-Hour
Format
Month Year
DST
Day
Power
Saving
City Code
4.When the setting you want to change is flashing, use Dto change it as described
below.
•The following steps explain how to configure timekeeping settings only.
Screen To do this:
Change the city code
Toggle between Daylight SavingTime
(
ON ) and StandardTime ( OFF )
Toggle between 12-hour (
12H ) and
24-hour (
24H ) timekeeping
Do this:
Press D(east).
PressD.
PressD.
Screen To do this:
Reset the seconds to 00
Change the hour or minutes
Change the year
Change the month or day
Do this:
PressD.
Press D(to increase).
5.Press Ato exit the setting screen.
•When you exit the setting screen, the analog hands are adjusted automatically to
match the digital time.See “Analog Timekeeping”for more information.
•See “Daylight SavingTime (DST)”for details about the DST setting.
•For information about specifying how long the face of the watch remains illuminated,
see “To specify the illumination duration”.
•For details about configuring settings for the Power Saving feature, see “Power
Saving”.
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
SavingTime.
To toggle theTimekeeping Mode digital time between DST and StandardTime
1.In the Timekeeping Mode, hold down Auntil the city
code starts to flash, which indicates the setting screen.
2.Press Conce and the DST setting screen appears.
3. Press Dto toggle between Daylight Saving Time (
ON
displayed) and Standard Time (
OFF
displayed).
4.Press Ato exit the setting screen.
•The DST indicator appears on the display to indicate
that Daylight SavingTime is turned on.
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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
When you change the Home City code and/or DST setting
•If the analog time does not match the digital time for some reason, use the
procedure below to adjust the analog time to the digital time.
•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 they stop moving.

—3 —
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 analog time setting screen.
3. Press Dto advance the analog time setting by 20
seconds.
•Holding down Dadvances the analog time setting at
high speed.
•If you need to advance the analog time setting a long way, hold down Duntil the
time starts advancing at high speed, and then press B.This locks the high-speed
hand movement, so you can release the two buttons. High-speed hand movement
continues until you press any button. It will also stop automatically after the time
advances 12 hours or if an alarm starts to sound.
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 the Timekeeping Mode, press C.
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World Time
World Time digitally displays the current time in 30 cities
(29 time zones) around the world.
•For full information on city codes, see the “City Code
Table”.
•All of the operations in this section are performed in the
WorldTime Mode, which you enter by pressing C.
NYC
City code
Current time in the
zone of the
selected city code
To view the time in another city
In the World Time Mode, press Dto scroll eastwardly through city codes (time
zones).
•The city code is displayed for about two seconds, and then it is replaced with the
current time for that city code. Pressing Awhile the time is displayed in theWorld
Time Mode causes the city code of the currently selected zone to appear.
•When the currently selected time zone is one that includes mostly ocean, a value
indicating the zone’s Greenwich Mean Time differential appears in place of a city
code.
•If the current time shown for a city is wrong, check your Home City time settings and
make the necessary changes.
To toggle a city code time between StandardTime and Daylight SavingTime
1. In theWorld Time Mode, use Dto display the city
code (time zone) whose Standard Time/Daylight Saving
Time setting you want to change.
2.Hold down Ato toggle between Daylight Saving Time
(DST indicator displayed) and Standard Time (DST
indicator not displayed).
•The DST indicator appears on the display whenever you
display a city code for which Daylight Saving Time is
turned on.
•You cannot toggle between Daylight Saving Time and StandardTime if the displayed
city code is GMT or the city code that is currently selected as the Home City in the
Timekeeping Mode.To change the DST setting of your Home City, use the
procedure under “To toggle the Timekeeping Mode digital time between DST and
StandardTime”.
•Note that the DST/Standard Time setting affects only the currently displayed city
code.Other city codes are not affected.
DST indicator
Alarm
When the alarm is turned on, the alarm sounds when the
alarm time is reached.You can also turn on an Hourly
Time Signal, which will cause the watch to beep twice
every hour on the hour.
•When the alarm is turned on, the alarm screen
alternates between (alarm on) and the current
alarm time (hour and minutes).When the alarm is off,
(alarm off) remains on the alarm screen.
•All of the operations in this section are performed in the
Alarm Mode, which you enter by pressing C.
•Pressing Din the Alarm Mode toggles between the
alarm screen and Hourly Time Signal screen.
2 seconds
On/Off status
Alarm Screen
Hourly Time Signal Screen
▲
▲PressD.
To set the alarm time
1.In the Alarm Mode, press Dto display the alarm
screen.
2.Hold down Auntil 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.
•When setting the alarm time using the 12-hour format,
take care to set the time correctly as a.m.(no
indicator) or p.m.(Pindicator).
5.Press Ato exit the setting screen.
Alarm Operation
The alarm sounds at the preset time for about 10 seconds, regardless of the mode the
watch is in.
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Alarm time
(Hour : Minutes)
•To stop the alarm tone after it starts to sound, press any button.
•Alarm and Hourly Time Signal operations are performed in accordance with the
Timekeeping Mode digital time.
To test the alarm
In the Alarm Mode, hold down Dto sound the alarm.
To turn the alarm and the HourlyTime Signal on and off
1.In the Alarm Mode, press Dto select the alarm or the
Hourly Time Signal screen.
2.Press Ato toggle the currently selected function on
(ON
displayed) and off (OF displayed).
•The alarm on indicator and the Hourly Time Signal on
indicator remain on the display in all modes while these
functions are turned on.
Hourly time signal
on indicator
Alarm on indicator
On/Off status
Stopwatch
The stopwatch lets you measure elapsed time, split times,
and two finishes.
•The display range of the stopwatch is 59 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 elapsed time 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.
STW
Minutes Seconds
SplitTime
D
Start Split
*
2
➤Split release Clear
A
➤Stop
*
1
A
➤
D
➤
A
*
2 Split times are displayed by cycling through the split indicator (
SPL
),
a minute and seconds screen, and a 1/100 second screen.
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D
Start Stop
*
1
ElapsedTime
➤Re-start Clear
D
➤ Stop
*
1
D
➤
D
➤
A
*
1 When elapsed time measurement is stopped, the display alternates between a
minute and seconds screen, and a 1/100 second screen at 2-second intervals.
To measure times with the stopwatch
1/100 secondMinutes and Seconds
*
3 When a split time operation is stopped, the display cycles through the same values
as those described in *2 above.In this case, however, the minute symbol (
'
) and
the seconds symbol (
''
) do not flash.
Two Finishes
D
Start Split
*
2
➤Split stop
*
3
Clear
A
➤Split release
*
1
D
➤
A
➤
A
First runner
finishes.
Display time of
first runner.
Second runner
finishes. Display time of
second runner.
Illumination
Two LEDs (light-emitting diodes) illuminate the face of the
watch for easy reading in the dark.The watch’s auto light
switch automatically illuminates the face when you angle
the watch towards your face.
•The auto light switch must be turned on (indicated by
the auto light switch on indicator) for it to operate.
•You can specify 1.5 seconds or 3 seconds as the
illumination duration.
•See “Illumination Precautions”for other important
information.
To illuminate the face of the watch manually
In any mode (except when a setting screen is on the display), press Bto illuminate
the face of the watch.
•The above operation turns on illumination regardless of the current auto light switch
setting.
Auto light switch
on indicator
Parallel to
ground More than 40°
About the Auto Light Switch
Turning on the auto light switch causes the face to illuminate, 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 illuminate the face under bright light.
Moving the watch to a position that is parallel to the ground and then tilting it
towards you at more than 40 degrees causes illumination to turn on.
•Wear the watch on the outside of your wrist.

—4 —
Warning!
•Always make sure you are in a safe place whenever you are reading the face
of the watch using the auto light switch. Be especially careful when running or
engaged in any other activity that can result in accident or injury. Also take
care that sudden illumination by the auto light switch does not startle or
distract others around you.
•When you are wearing the watch, make sure that its auto light switch is turned
off before riding on a bicycle or operating a motorcycle or any other motor
vehicle. Sudden and unintended operation of the auto light switch can create a
distraction, which can result in a traffic accident and serious personal injury.
To turn the auto light switch on and off
In any mode (except when a setting screen is on the display), hold down Bfor about
two seconds to toggle the auto light switch on ( displayed) and off ( not
displayed).
•The auto light switch on indicator ( ) is on the display in all modes while the auto
light switch is turned on.
•The auto light switch turns off automatically whenever battery power drops to Level
3.
•The auto light switch is disabled, regardless of its on/off setting, when the Hand
Setting Mode’s setting screen.
To specify the illumination duration
1. In the Timekeeping Mode, hold down Auntil the city
code starts to flash, which indicates the setting screen.
2. Press Cthree times to move the flashing to the
seconds setting.
3. Press Bto toggle the illumination duration setting
between 3 seconds ( ) and 1.5 seconds ( ).
4.Press Ato exit the setting screen.
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Power Supply
This watch is equipped with a solar cell and a special 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.
•The illustration shows how to position a
watch with a resin band.
•Note that charging efficiency drops
when any part of the solar cell is
blocked by clothing, etc.
•You should try to keep the watch
outside of your sleeve as much as
possible.Even if the face of the watch
is only partially blocked from light,
charging will be significantly reduced.
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.Make sure that the watch is normally exposed to bright light
whenever possible.
•This watch uses a special rechargeable battery to store power produced by the solar
cell, so regular battery replacement is not required. However, after very long use, the
rechargeable battery may lose its ability to achieve a full charge.If you experience
problems getting the special rechargeable battery to fully charge, contact your
dealer or CASIO distributor about having it replaced.
•
Never try to remove or replace the watch’s special battery yourself. Use of the wrong
type of battery can damage the watch.
•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.
Battery Power Levels
The digital display show you the current level of the rechargeable battery’s power.
•All of the watch’s functions are available when (high) or (medium) is
indicated on the Battery Level Screen. Function Status
All functions enabled.
All functions enabled.
Except for internal
timekeeping and the charge
indicator, all functions and
display indicators are
disabled.
All functions disabled.
Level
1
2
3
(Charge
soon alert)
4
Digital Display
Charge indicator
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•Level 1 and Level 2 are indicated on the Battery Level Screen only. Level 3 and
Level 4 are indicated in all modes.
•The flashing charge indicator 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.
•When the battery level approaches Level 3, the analog hands move automatically to
the 12 o’clock position.Charge the battery as soon as possible when this happens.
All of the digital screen indicators flash while the analog hands are in motion.
•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 digital time and date, after the battery reaches
Level 3 from Level 4.You will not be able to set any of the other settings until the
battery reaches Level 2 after dropping to Level 4.
•Display indicators reappear as soon as the battery is charged from Level 4 to Level 3.
•If the analog time and digital time do not match after the watch recovers to Level 2
from Level 3 or Level 4, adjust the analog hand setting so it matches the digital time.
•Leaving the watch exposed to direct sunlight or some other very strong light source
can cause the digital display to show a reading temporarily that is higher than the
actual battery level.The correct battery level should be indicated after a few minutes.
Recover Indicator If you use illumination or alarms a number of times during
a short period, the recover indicator (R) appears on the
display and the following operations become disabled until
battery power recovers.
Illumination; Beeper tone; Coordination between digital
and analog timekeeping
After some time, battery power will recover and the
recover indicator will disappear, indicating that the above
functions are enabled again.
•If the battery drops to Level 3 while the recover indicator is on the display, the
Battery Level Screen will indicate . Charge the battery as soon as possible.
•If the recover indicator appears frequently, it probably means that remaining battery
power is low.Leave the watch in bright light to allow it to charge.
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Recover indicator
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 15 months.
•The following table shows the amount of time the watch needs to be exposed to light
each day in order to generate enough power for normal daily operations.
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
7 minutes
24 minutes
39 minutes
7 hours
•Since these are the specs, we can include all the technical details.
•Watch is not exposed to light
•Internal timekeeping
•Display on 18 hours per day, sleep state 6 hours per day
•1 light operation (1.5 seconds) per day
•10 seconds of alarm operation 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.
•The above exposure time values are all for reference only.Actual required exposure
times depend on lighting conditions.
54 hours
203 hours
328 hours
15 hours
56 hours
90 hours
–––
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
▲ ▲
▲
3 hours
9 hours
14 hours
169 hours
▲
Exposure Level
(Brightness)
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
When turned on, Power Saving automatically enters a sleep state whenever the watch
is left for a certain period in an area where it is dark.The table below shows how
watch functions are affected by Power Saving.
•There are actually two sleep state levels: “display sleep”and “function sleep”.
ElapsedTime in Dark
60 to 70 minutes
(Display Sleep)
6 or 7 days
(Function Sleep)
Operation
Digital display off, but all functions are enabled and the
power saving on indicator flashes on the display
•Digital display off, but the power saving on indicator
flashes on the display
•All functions, including analog timekeeping, disabled
•Internal timekeeping maintained
•Wearing the watch inside your sleeve can cause it to enter the sleep state.
•The watch will not enter the sleep state while the digital time is between 6:00 AM
and 9:59 PM. If the watch is already in the sleep state when the digital time reaches
6:00 AM, however, it will remain in the sleep state.
•The analog hands move to the 12 o’clock position when the watch enters the
function sleep state.If the analog time and digital time do not match after the watch
recovers from the function sleep state, adjust the analog hand setting so it matches
the digital time.
•The watch will not enter the sleep state while it is in the Stopwatch Mode.
To recover from the sleep state
Perform any one of the following operations.
•Move the watch to a well-lit area. It can take up to two seconds for the display to turn
on.
•Press any button.
•Angle the watch towards your face for reading.

—5 —
ATH
CAI
JRS
JED
THR
DXB
KBL
KHI
DEL
DAC
RGN
BKK
HKG
SEL
TYO
ADL
SYD
NOU
WLG
To turn Power Saving on and off
1. In the Timekeeping Mode, hold down Auntil the city
code starts to flash, which indicates the setting screen.
2. Press Cnine times until the Power Saving on/off
screen appears.
3. Press Dto toggle Power Saving on ( ) and off
().
4.Press Ato exit the setting screen.
•The Power Saving on indicator is on the display in all
modes while Power Saving is turned on.
Auto Return Features
•The watch automatically returns to the Timekeeping Mode if you do not perform any
button operation for two or three minutes while the Battery Level Screen is
displayed, or while in the Alarm, or Hand Setting Mode.
•If you leave a screen with flashing digits on the display for two or three minutes
without performing any operation, the watch automatically exits the setting screen.
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Power saving
on indicator
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 theTimekeeping, WorldTime, or Alarm Mode, the data you were
viewing when you last exited the mode appears first.
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 year can be set in the range of 2000 to 2099.The day of the week is calculated
automatically in accordance with the date.
•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 theTimekeeping Mode and World Time Mode is
calculated in accordance with the Greenwich MeanTime (GMT) differential for each
city, based on your Home City time setting.
•GMT differential is calculated by this watch based on UniversalTime Coordinated
(UTC*) data.
*
UTC 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, without
any indicator.
Illumination Precautions
•The illumination provided by the light may be hard to see when viewed under direct
sunlight.
•Illumination automatically turns off whenever an alarm sounds.
•Frequent use of illumination shortens the battery operating time.
Auto light switch precautions
•Wearing the watch on the inside of your wrist, movement of your arm, or vibration of
your arm can cause frequent activation of the auto light switch and illumination of the
face of the watch.To avoid running down the battery, turn off the auto light switch
whenever engaging in activities that might cause frequent illumination of the face.
•Note that wearing the watch under your sleeve while the auto light switch is turned
on can cause frequent illumination of the face and can run down the battery.
•Illumination may not turn on 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.
•Illumination turns off after the preset illumination
duration (see “To specify the illumination duration”), 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 illumination
does not turn on, try moving the watch back to the
starting position (parallel with the ground) and then tilt it
back towards your face 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.
•Under certain conditions, illumination may not turn on
until about one second after you turn the face of the
watch towards you.This does not necessarily indicate
malfunction of the auto light switch.
•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.
More than 15 degrees
too high
Honolulu
Anchorage
Los Angeles
Denver
Chicago
NewYork
Caracas
Rio De Janeiro
London
Paris
Berlin
City City GMT Other major cities in same time zone
Code Differential
City CodeTable
–11
HNL
ANC
LAX
DEN
CHI
NYC
CCS
RIO
–02
–01
GMT
LON
PAR
BER
–11.0
–10.0
–09.0
–08.0
–07.0
–06.0
–05.0
–04.0
–03.0
–02.0
–01.0
+00.0
+01.0
Pago Pago
Papeete
Nome
San Francisco, Las Vegas, Vancouver,
Seattle/Tacoma, 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
Athens
Cairo
Jerusalem
Jeddah
Tehran
Dubai
Kabul
Karachi
Delhi
Dhaka
Yangon
Bangkok
Hong Kong
Seoul
Tokyo
Adelaide
Sydney
Noumea
Wellington
+02.0
+03.0
+03.5
+04.0
+04.5
+05.0
+05.5
+06.0
+06.5
+07.0
+08.0
+09.0
+09.5
+10.0
+11.0
+12.0
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
Port Vila
Christchurch, Nadi, Nauru Island
•Based on data as of June 2004.

—6 —
3. DRAWINGS: MODULE QW-3765
3-1. LCD DIAGRAM
L 9 L 8 L10 L11 L12 L13 L14 L15 L16 L17 L18 L19 L20 L21 L22 L23 L24 L28 L29 L30 LC4 LC2 L 7 LC5 LC3 L 6 LC1 L25 L26 L27
RECOVER
A.LIGHT
DST1PM
CHARGE SAVE
X0
Y0
Y4
X16
SIGALM W0
W1
W2
W3
W4W5
W6
W7
W8 W9
LC1 LC2 LC3 LC4 LC5 LC1 LC2 LC3 LC4 LC5
X8Y4 X8Y3 X8Y2 X8Y1 X8Y0
X9Y4 X9Y3 X9Y2 X9Y1 X9Y0
X10Y4 X10Y3 X10Y2 X10Y1 X10Y0
X11Y4 X11Y3 X11Y2 X11Y1 X11Y0
X12Y4 X12Y3 X12Y2 X12Y1 X12Y0
X13Y4 X13Y3 X13Y2 X13Y1 X13Y0
X14Y4 X14Y3 X14Y2 X14Y1 X14Y0
X15Y4 X15Y3 X15Y2 X15Y1 X15Y0
X16Y4 X16Y3 X16Y2 X16Y1 X16Y0
RECOVER A.LIGHT
X4Y4 X4Y3 X4Y2 X4Y1 X4Y0
X3Y4 X3Y3 X3Y2 X3Y1 X3Y0
X2Y4 X2Y3 X2Y2 X2Y1 X2Y0
L 8
L 9
L 6
L 7
L10
L11
L12
L13
L14
L15
L16
X1Y4 X1Y3 X1Y2 X1Y1 X1Y0
X0Y4 X0Y3 X0Y2 X0Y1 X0Y0
X5Y4 X5Y3 X5Y2 X5Y1 X5Y0
X6Y4 X6Y3 X6Y2 X6Y1 X6Y0
X7Y4 X7Y3 X7Y2 X7Y1 X7Y0
DST1 w8 w6 w5 PM
w9 w7 w4
w0 SIG
w1 w2 w3 ALM
L17
L18
L20
L19
L21
L22
L23
L24
L25
L26
L27
COM.
SEG. COM. SEG.
L30
CHARGE
SAVE
L29
L28
COM.
SEG.

— 7 —
3-2. CIRCUIT DIAGRAM
GND VDD2
BAT
VCH
VDD3
VC1 VC2
C3
C2C5
XTB
Xtal
L6 - - - L30 LC1 - - - LC5
CT
LCD ( 2.8V 1/3b 1/5d )
LD1
S2
VDD1
C1
BD
C8
LL1
Tr1
Tr2
XT
T1 T2 T3
KI1 KI2 KI3 KI4 KI7 KI5 KI6 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
SC
C9
R3
Z
VPM
Di2 R1
Rb
GNDB
S4 S3
SDI
N1 N2
KS
An.B1 L32 - - L36
L3 - L5, L31,L37 - - - L55
L1 L2
Cxt
Rxt2
Ccp
Cbat
Rbat
Xtal2
ISB
ANT
Rcp
Rxt3
Xtal3
Cc
FET-S
GND4
Asel Pon
P3-2 Hold P14
FET-D
P1 P2
GND3 GND2
P3-1 P4 P5
GND5
P12 P13
GND1
TCO VCC
P9 P7
Crh1 Crh2 Crh3 Crl1 Crl2 Crl3
VOUT0
COILB
LED
DRIVER
5ENABLE 4(N.C.)
3GND
2(N.C.)
1LEDOUT (N.C.)A
(N.C.)9
VDD8
CE27
6CE1
LED1
Di LL2
R1
LED2R1 LED3R1 OP1 OP2
Cld1
Cld2
Rpd
LSI
TOTAL 106PINS
BONDING 79PINS
✽9
✽6
✽15
✽16
✽17
✽4 ✽5
✽18
✽5 ✽4 ✽4
✽3 ✽3 ✽3 ✽3 ✽3 ✽3 ✽3
✽8✽8✽7
✽10 ✽13
✽13
✽19
✽13 ✽13
✽14
✽13✽12
✽13
✽11
✽1✽1✽1✽1
✽1
✽3 ✽3
✽2
✽2 ✽2
✽ 1. No bonding ✽ 2. GND-Kl5: Open (No Soldering) GND-Kl6: Short (Soldering) GND-Kl7: Short (Soldering) ✽ 3. Latch type key ✽ 4. Short (Soldering) (R trimming) ✽ 5. Short (Soldering) (N trimming) ✽ 6. GNDB is used for the bias on the back of the tip. ✽ 7. L28~L30 are used as the static drive pins. ✽ 8. Motor drive pins (01 and 02) are used in this module. ✽ 9. Normal Low ✽ 10. LD2 (Normal Low) is used in this module.
✽ 11. LD3 (Normal High) is used in this module. ✽ 12. Cxt is not mounted in the specification for dual translmitters. ✽ 13. Cc, Crl1, Crl2, Crl3,Rxt3 and Xtal3 are not mounted in the specification for single transmitter. ✽ 14. Rpd is not mounted in the specification which includes signal reception. ✽ 15. Short here with a soldering short pad when three LEDs are mounted. ✽ 16. Mount Tr2 only when one LED is mounted. ✽ 17. Short here with a soldering short pad only when one LED is mounted. ✽ 18. Inclination sensor ✽ 19. No parts except Rdp are mounted within the area of the dotted line in modules without signal reception function.

—8 —
3-3. CHECKING TERMINALS AND COMPONENTS
Short pad for R trimming
OSCILLATOR/CRYSTAL
(7110 6336)
SENSOR/TILT
(7105 5275)
CUSHION 466-A
(7211 9576)
CAPACITOR/TRIMMER
(1009 7666)
Short pad for N trimming
CUSHION 506
(7211 9631)
16. PCB ASS'Y
(7640 8453)
CUSHION 506
(7211 9631)
TAPE/ADHESIVE
(1000 6652) Short pad for switching modules
VDD2 OP
LEDOUT
OP
KI8
KI1
VOUT
GND
LED2
LEDOUT
VOUT
COIL
LEDOUT
LED1
SCIN
SCR
SCIN
VSC
VDD2
COIL
GND
VOUT
GND
VDD2
GND
LEDOUT
GND
GND
LD1
CE1 CE2
VSC
L 9 L 8 L10 L11 L12 L13 L14 L15 L16 L17 L18 L19 L20 L21 L22 L23 L24 L25 L26 L27 L28 L29 L30
LED2
VOUT
LED1
VDD2
VOUT
COIL
P4P5P7
GND SCIN GND
GND
X3 X2P5
CE2CE1 GND VOUT
OP
LED3
LEDOUT
GND LD1
GND
VC4
VDD3
VC3
LC4 LC2 L 7
VSC
LC5 LC3 L 6 LC1
X2
P7
P7
X3
L1
L2
KI4 KI2
KI3
GND
LED3
R3
R2
R1
P9
Ccp
Ccp
GND
AC
L1
GND
GND
KI5
KI6
GND
KI7
GND
VC1
KI8
KI8
VDSP
P13
P1
P2
VSC
GNDB
GND
VCC
KI9
GND
VCC
GND
XT
XT
P2
GND
LL1
VDD2
GND
LL1
TR1
GND
N2
GND
GND
VDSP
VC2VC1
GND
VDD1
N1
GND
GND
GND
GND
FET-D
XTB
LL1
TR1BD
VDD2
GND
TR1
LL1
VDD2
GND
VCH
VDD2
P14P12
FET-S
KI3
VDD2
KI2
GND
KI2
KI4
KI3 KI1
KI4
KI1
VHF
GND

— 9 —
4. EXPLODED VIEW: MODULE QW-3765
22 (1005 3572) 22 (1005 3572)
21 (7230 1025)
25 (7224 0652)
26 (1015 5787)
17 (7228 0511)
11 (1015 5789)
2 (1006 5657)
Battery storage (CTL1616)
14 (1015 7977)
Casing parts: SOLAR CELL
9 (1015 5782)
Casing parts: DIAL
SPACER
5 (1001 6598)
16 (7640 8453)
PCB Ass'y
8 (1001 4042)
20 (7201 9249)
12 (1015 5784)
8 (1001 4042)
13 (1006 5664)
8 (1001 4042)
1 (7640 7573)
4 (1013 0977)
17 (7228 0511)
10 (1001 6591)
23 (1015 5788)
8 (1001 4042)
18 (1012 3230)
18 (1012 3230)

5. PARTS LIST: MODULE QW-3765
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 basi
s
Batteries in Blister pack will be supplied from our Sales Department.
4. As for order/supply of spare parts, refer to the separate publication "GUIDE BOOK for spare parts supply".
Item Code No. Parts Name S
p
ecification A
pp
licable Q R
7640 8443 MODULE/WITH MOVEMENT QW-3765AT-01TK GW-1501B-1AV 1 A
GW-1501S-8AV
17640 7573 ANALOG BLOCK QW-3329MV-82TK QW-3765AT-01TK 1 A
21006 5657 BATTERY/STORAGE CTL1616 QW-3765AT-01TK 1 B
31009 7666 CAPACITOR/TRIMMER CTZ2E-25C-W2-P QW-3765AT-01TK 1 B
41013 0977 COIL ASS'Y RJQ513694*001V01 QW-3765AT-01TK 1 A
51001 6598 CONTACT/BATTERY(-) 2348 Q366836-1 QW-3765AT-01TK 1 C
67211 9576 CUSHION 466-A Q48342A-1 QW-3765AT-01TK 1 C
77211 9631 CUSHION 506 Q49364-1 QW-3765AT-01TK 2 C
81001 4042 CUSHION 2306-1 Q466421-1 QW-3765AT-01TK 2 C
91015 5782 HOLDER 3329 RJQ518016-001V02 QW-3765AT-01TK 1 C
10 1001 6591 HOLDER/BATTERY Q366808-1 QW-3765AT-01TK 1 C
11 1015 5789 HOLDER/HOUR WHEEL 3329 RJQ517854-001V01 QW-3765AT-01TK 1 C
12 1015 5784 INTERCONNECTOR/ 3329 RJQ518251-001V01 QW-3765AT-01TK 1 C
13 1006 5664 LABEL/ 2368 Q468543A-1 QW-3765AT-01TK 1 C
14 1015 7977 LCD K3364-01THP QW-3765AT-01TK 1 A
15 7110 6336 OSCILLATOR/CRYSTAL CFS-145LM07 QW-3765AT-01TK 1 B
16 7640 8453 PCB ASS'Y RJQ520211*002V01TK QW-3765AT-01TK 1 A
17 7228 0511 SCREW/FLAT 388 Q422638-1 QW-3765AT-01TK 2 B
18 1012 3230 SCREW/FLAT2730 RJQ513792-001V01 QW-3765AT-01TK 3 B
19 7105 5275 SENSOR/TILT TS-2418-P QW-3765AT-01TK 1 B
20 7201 9249 SPRING/COIL 675-3 Q413389A-1 QW-3765AT-01TK 1 B
21 7230 1025 SPRING/COIL 1510-1 Q459238-1 QW-3765AT-01TK 3 B
22 1005 3572 SPRING/COIL 2375-1 Q468078-1 QW-3765AT-01TK 4 B
23 1015 5788 SUPPORTER/PCB ASSY 3329 RJQ517852-001V01 QW-3765AT-01TK 1 C
24 1000 6652 TAPE/ADHESIVE Q465964-1 QW-3765AT-01TK 1 C
25 7224 0652 WASHER Q421691-1 QW-3765AT-01TK 1 C
26 1015 5787 WHEEL/HOUR 3329 RJQ517619-001V01 QW-3765AT-01TK 1 C
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.-615.
Notes: Q - Used quantity
R - Rank — 10 —

—11 —
6. PRECAUTIONS FOR REPAIR: MODULE QW-3765
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-3765

— 12 —
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 in 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 “ ” 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 3
Figure 1 Figure 2
Press D, Aand Bbuttons
D
B
C
A
Place the watch in a dark
room more than two seconds.
“ ” appears on the display.
Figure 4 Figure 5
Tilt the watch towards you
more than 40°
More than 40°
“TL” appears on the display.
“ ” appears on the display.

Ver. 1 : May. 2006
Correction of pages 9 and 10
CASIO COMPUTER CO.,LTD.
Overseas Service Division
6-2, Hon-machi 1-Chome
Shibuya-ku, Tokyo 151-8543, Japan