Casio GW-1200BCJ, QW-3334, QW-3346 Service Manual & Parts List
SERVICE MANUAL
& PARTS LIST
REF. NO. S/M-872
NOV. 2004
MODULE NO.
QW-3334
GW-1200BCJ
R
(WITHOUT PRICE)
CONTENTS
Page
1. SPECIFICATIONS: MODULE QW-3334 .................................................... 1
2. OPERATION CHART: MODULE QW-3334 ............................................... 2
3. DRAWINGS: MODULE QW-3334
3-1. LCD DIAGRAM ............................................................................................ 10
3-2. CIRCUIT DIAGRAM .....................................................................................11
3-3. CHECKING TERMINALS AND COMPONENTS ......................................... 12
4. EXPLODED VIEW: MODULE QW-3334 ................................................... 13
5. PARTS LIST: MODULE QW-3334 ............................................................ 14
6. PRECAUTIONS FOR REPAIR: MODULE QW-3334
6-1. AC (ALL CLEAR) AND REMOVING OF MODULE .....................................15
6-2. ACCURACY CHECKING ............................................................................. 15
6-3. SOLAR CELL-PCB ASS'Y CONTACT CHECKING....................................16
6-4. HOW TO CHECK TILT SENSOR................................................................. 16
7. TROUBLESHOOTING: MODULE QW-3334.............................................17
1. SPECIFICATIONS: MODULE QW-3334
Item Detail
Battery CTL1025 (Storage battery)×2
Note: Use CTL1025 only. Other storage battery or CR1025 can cause
damage to the watch.
Battery life Approx. 7 month (from full charged condition)
Current consumption 0.685 µA maximum
Alarm system Piezo plate on Cover/Back
Accuracy ±15 sec./month
Accuracy setting system Trimmer capacitor
Accuracy checking See page 15
Functions • Shock resistant (G-SHOCK)
• Tough Solar: large-capacity solar charging system
• World time
30 time zones (29 cities), daylight saving on/off
• 1/100-second stopwatch
Measuring capacity: 59'59.99"
Measuring modes: Elapsed time
• Countdown timer
Input range: 1 minute to 60 minutes
Unit: 1/10 second (repeat timer), 1second (auto repeat timer)
Others: Auto-repeat
• 5 independent daily alarms
Horly time signal
• Battery power indicator
• Power Saving (Turns off the display when the watch is left in the dark)
• Auto-calendar
• 12/24-hour format
• Super illuminator
Full auto EL light, afterglow
Time Calibration
Signal Receotion: Auto Receive (four times per day, at 0:00 AM, 1:00
AM, 2:00 AM, 3:00 AM, 4:00 AM, and 5:00 AM);
Manual Receive; Last Signal screen
Receivable Time: 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)
— 1 —
2. OPERATION CHART: MODULE QW-3334
White indicates “ON”.
White-On-Black Display
LCD Types
This watch is available with either of two different LCD types: light
background with dark figures (black-on-white) or dark background
with light figures (white-on-black).
Black indicates “ON”.
Black-On-White Display
Note that all of the samples in this manual show the
black-on-white type LCD.
When alarm is off
•
Alarm Number Graph
World Time Mode Alarm Mode
Mode Indicator
Alarm Number
World Time
Mode Indicator
City Code
Alarm Time
Mode Indicator
Number of
Repeats
Auto Repeat
•
Stopwatch Mode Timer Mode
Mode Indicator
Timer Time
Mode Indicator
Measured Value
Power Saving
Power Saving
Power saving causes the watch to automatically enter a sleep state to save power whenever the watch is left in the dark. The Power
Saving feature of the watch is turned on at the factory.
• Note that the watch may also enter the sleep state if its face is blocked from light by your sleeve.
The display sleep state is triggered whenever the watch is left in
■ How the sleep state works
the dark for about one hour between the hours of 10 p.m. and 6
There are actually two sleep state levels, a “display sleep state”
and a “function sleep state”.
• Display sleep state
Indicator
Leaving the watch in a drawer or anywhere else it is dark can
■ To recover from the sleep mode
normally while the watch is in the display sleep state.
Even when the watch is in the display sleep state, analog time
timekeeping and auto signal receive are both performed.
• Alarms and the Hourly Time Signal continue to operate
a.m. The display sleep state causes the display to go blank.
• The watch does not enter the display sleep state if it is in the
you place the watch in a well-lit area.
Place the watch in an area that is well-lit, press any button, or
angle the watch towards your face to illuminate the display using
the auto light.
• It can take up to two seconds before the display re-appears after
Timer Mode or Stopwatch Mode.
watch is in the function sleep state.
• Alarms and the Hourly Time Signal are also disabled while the
The function sleep state is triggered whenever the watch is left in
the dark for six or seven days.
• Function sleep state
cause the power saving mode to trigger in order to conserve
■ To turn power saving on and off
See the procedure under “Manually Setting the Time and Date”.
Analog time timekeeping and auto signal receive are not
performed while the watch is in the function sleep state.
function sleep state.
• Timekeeping functions continue to operate normally in the
: Friday
FRI
Mode Indicator
Mode Name
Hand Setting Mode
: Saturday
battery power.
: Wednesday THU : Thursday
dial turn on and off to indicate the seconds count.
SAT
• The segments around the seconds value in the left
button
Mode Indicator
• For information about the battery indicator, see
button
Days of the Week
SUN : Sunday MON : Monday TUE : Tuesday
WED
Timekeeping Mode
(Switches display screen.)
Receive Indicator
“Battery Indicator”. For information about the
receive icon and receive indicator, see “Receive
Icon and Indicator”.
Battery Level Indicator
(Illuminates display)
button
.
CC
CC
C button sounds a confirmation tone and cycles through available modes in the sequence shown below.
button
Modes and Display Screens
Each press of the
• The watch will automatically revert to the Timekeeping Mode if you leave it in the Alarm Mode or Hand Setting Mode without performing any
Receive Icon
operation for about two or three minutes.
button
(Changes mode)
Graph Screen
Switching Between Screens
Each press of the button cycles the middle dials in the
sequence shown below
Seconds
DaySeconds Day of the WeekDay of the Week
Hour and Minute SecondsSeconds
PM Indicator (no indicator for AM) Month and Day
— 2 —
Time
Charging
(Luminosity)
Environment
The following is the daily
amount of charging required
each day to support the
operations under “Daily Use”.
Required Daily Charging Time
•
Outdoor sunlight
6min.
30min.
(50,000 lux)
(10,000 lux)
Indoor sunlight
8hr.
48min.
(5,000 lux)
lighting (500 lux)
Outdoor overcast
Fluorescent indoor
Charging Time
Level 1
Level 4 Level 3 Level 2
5hr.19hr.
22hr.97hr.
36hr.157hr.
– – – – – –
2 hr.
7 hr.
11 hr.
113hr.
(Luminosity)
Daily Use (All time values are
approximate.)
• Illumination: 1.5 seconds
• Alarms: 10 seconds
• Signal reception: 5 times
■ Charging Guide
Starting from a full charge, the watch
should be able to continue operating
for about seven months without
further charging under the conditions
described below.
■ Charging Precautions
heat
Avoid charging the watch in the following locations, and anywhere
else the watch may become very hot.
• On the dashboard of an automobile parked in the sun
• Very close to an incandescent light source or other sources of
• In a location exposed to direct sunlight for long periods
Note that the display panel may become black under very high
• Digital display: 18 hours
Making sure the watch is regularly
exposed to light ensure stable
Depending on the light source you are using, the
case of the watch may become quite hot during
charging. Take care to guard against burn injury
after charging.
temperatures. This is temporary, and the display will appear
normal again at lower temperatures.
All functions enabled.
All functions enabled.
Environment
operation.
• Charge Times Required to Advance to a Higher Level
charging efficiency.
■ Charging the Battery
Point the solar panel (face) of the watch at a light source.
• Remember that even a partial blockage of the solar cell reduces
Display, illumination, alarms, Hourly
Time Signal, signal reception, and
analog timekeeping disabled.
All functions, including digital
timekeeping, disabled.
(10,000 lux)
Indoor sunlight
Solar Cell
(5,000 lux)
lighting (500 lux)
Outdoor overcast
Fluorescent indoor
• Note that the above charging times are for reference only. Actual
(50,000 lux)
Outdoor sunlight
Example: Positioning the watch
charging time depends on a variety of environmental factors.
• The illustration shows the resin band model.
your sleeve covers the display of the watch.
watch towards your face. This does not indicate malfunction.
(1.5 or 2.5 seconds) only, even if you leave the watch angled
towards your face.
power is at Level 3 or lower.
watch on the inside of your wrist, when you shake your arm, or
when you raise your arm. Be sure to turn off the auto light
switch whenever you do not need illumination.
Auto Light Precautions
• Frequent use of the auto light can run down the battery.
• The auto light switch may cause the display to illuminate when
• The display may not illuminate immediately when you angle the
• The display remains lit for the currently set illumination duration
• The auto light switch is automatically disabled whenever battery
More
than 40
Rotate your arm so the watch
is angled at about 40 degrees,
so you can read its face.
22
22
2
With the watch on
your wrist, position it
level with the ground.
11
11
1
■ Positioning Your Arm Correctly
the watch on the inside of your wrist.
• The display may illuminate unintentionally when you wear the
• Keep the auto light switch turned off whenever you are wearing
• Electro-static charge and magnetism can interfere with auto light
degrees
when using the auto light switch.
• You should be wearing the watch on the outside of your wrist
operation and even make operation impossible. If this happens
lower your arm to the starting position and then raise it again. If
you still have trouble with illumination, try lowering your arm down
to your side and then raise it to your face for reading.
15 degrees of
±
sunlight.
being parallel with the ground.
The auto light switch may not
operate properly if the angle is
and right (3 o’clock) sides of the
• Make sure that the left (9 o’clock)
greater.
watch are within
display is illuminated, illumination will turn off.
Important!
• The light may be difficult to see if you turn it on under bright
• If you press the L button or if an alarm operation starts while the
Black
Display
White-On-
White
Display
Black-On-
■ Battery Indicator
Power Supply
The power supply of this watch uses a solar cell to generate
electrical power, which is stored by a rechargeable battery. Using
Level1Level2Level3Level
Note that all data in memory and all settings are cleared
whenever you allow the level of the rechargeable battery
or storing the watch where it is not regularly exposed to light, or
allowing it to be blocked from light by your sleeve as you are
wearing it can cause the power of the rechargeable battery to run
down. To ensure stable operation, be sure to allow the watch to be
exposed to light as much as possible when you are wearing or
storing it.
to drop to Level 4.
4
■ Flashing RECOVER Indicator
If you use the light or alarms a number of times during a short
the battery level indicator to momentarily indicate a level that is higher
than the actual battery level. Because of this, you should wait for a
short while after charging to check the battery level indicator.
be able to recharge the battery and use the watch again.
the battery level recharges to Level 3. At this time you should
continue to expose the watch to light so it can charge up to Level
• Exposing the watch to direct sunlight or other strong light may cause
RECOVER
2 or Level 1.
• Even if the battery level drops all the way to Level 4, you will still
• When recharging from Level 4, set the current time and date after
Indicator
■ Start charging at Level 3!
Battery Level 3 indicates that remaining battery power is very low.
Be sure to expose the watch to light for recharging as soon as
possible after the battery level indicator shows Level 3.
Illuminating the Display with the
Illumination
period, a RECOVER indicator flashes in the top dial, and the
following operations become disabled as battery power recovers.
• Illumination
• Alarm and Hourly Time Signal
• Time calibration signal reception
Normal operation will return after the
battery recovers.
— 3 —
An LED is used to illuminate the display for easy reading in the
dark. An auto light switch automatically turns on illumination when
surrounding light is bright.
Duration” to configure the illumination duration as
The auto light switch automatically illuminates the display
whenever you angle the watch towards your face for reading,
but only when it is dark.
You can use the procedure under “Specifying the Illumination
approximately 1.5 seconds or 2.5 seconds.
• The auto light switch does not illuminate the display when
The auto light switch illuminates the display in all modes.
Turning the Auto Light Switch On and Off
In any mode, hold down the L button for about two seconds to
toggle the auto light switch on (auto light switch on indicator
Auto Light Switch
LL
LL
L button in any
“Specifying the Illumination
Duration” to configure the
illumination duration as
Press the
you angle the watch towards your face for reading.
mode to illuminate the display.
Illuminating the Display Manually
approximately 1.5 seconds or 2.5
• You can use the procedure under
displayed in the upper dial) and off (no indicator displayed).
seconds.
• Pressing the L button
You may hear a faint rattling sound when you move the watch
illuminates the display regardless
of whether the auto light switch is
on or off.
Auto light switch
on indicator
around. This sound is caused by the movement of a metal
bulb that controls operation of the auto light switch, and does
not indicate malfunction.
Fort Collins
3000km
1000km
Transmitter
receivable up to 3,000 kilometers from the transmitter. Note
Transmitter Location
(40kHz)
Mt. Otakadoya
Either the Mt. Otakadoya signal (40kHz) or the Mt. Hagane signal (60kHz)
1000km
Fort Collins, Colorado signal
500km
that the wave is relatively weak at distances greater than
• Under optimum conditions, the calibration signal should be
1000km
1,000km, so reception may be poor at long distances.
in the
BB
BB
B button to
in the bottom
toggle the illumination
dial).
duration between about
1.5 seconds (
bottom dial) and 2.5
seconds (
3. Press the
AA
AA
A
button to exit the setting screen.
do not perform any operation for about two or three minutes.
• The watch will also exit the setting screen automatically if you
4. After the setting is the way you want, press the
City Code
Seconds
(3 times)
TYO
Home City
LAX, DEN, CHI, NYC
“City Code List”.
Reception Range
This watch is designed to receive the standard time calibration signal of Japan (JJY) or of the United States (WWVB). The signal that is
received depends on the current Home City setting.
• For information about selecting a Home City, see “Manually Setting the Time and Date”. For information about city codes, see the
the independent Japan Ministry of Posts and Telecommunications
Communication Research Laboratory (CRL). It is a long wave
signal transmitted 24 hours a day from the Mt. Otakadoya
Calibration Signal
transmitter (40kHz) located in Tamura-gun, Fukushima Prefecture,
• The Japanese calibration signal (Call Sign: JJY) is maintained by
Transmitter Location
and from the Mt. Hagane transmitter (60kHz) located on the
border between Saga Prefecture and Fukuoka Prefecture.
the National Institute of Standards and technology from Fort
Collins, Colorado.
• The U.S. calibration signal (Call Sign: WWVB) is transmitted by
Watch decodes
received data and
converts it to time
Signal is received using
built-in antenna.
Signal Data
500km
receivable up to 1,000 kilometers from the transmitter. Note
that the wave is relatively weak at distances greater than
(60kHz)
Mt. Hagane
Though the calibration signal is normally transmitted 24 hours
a day, transmission may be interrupted occasionally due to
maintenance, lightening, etc.
data.
Time is adjusted
according to time
data.
Decode
Internally
Time Data
500km, so reception may be poor at long distances.
• Under optimum conditions, the calibration signal should be
the transmitter.
• Geographic contours, nearby buildings, the season, the time of day, can even make reception impossible even when you are within range of
• Best reception is possible late at night.
AA
AA
A for about
hold down
one second until the city
code starts to flash in the
bottom dial. This is the
setting screen.
Specifying the Illumination Duration
1. In the Timekeeping Mode,
CC
CC
C button three
times to move the flashing
to the seconds count in
the left dial.
2. Press the
— 4 —
Long-wave
Calibration Signal
How a Radio-controlled Watch Works
What is a radio-controlled watch?
Your radio-controlled watch is designed to receive a time
Transmitter
calibration signal that contains standard time data and adjust its
current time setting accordingly.
Watch
Cesium
Atomic Clock
After the watch receives the time calibration signal, it performs
internal calculations to determine the current time. Because of
this, there may be an error of up to one second in the
displayed time.
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