Casio OCW-110TDJ, OCW-100TDJ Service Manual & Parts List
S
ERVICE
M
ANUAL
& PARTS LIST
MODULE NO.
QW-3721
REF. NO. S/M-920
OCT. 2005
OCW-110TDJOCW-100TDJ
Ver.1 : Jun. 2010
(WITHOUT PRICE)
CONTENTS
Page
1. SPECIFICATIONS: MODULE QW-3721 .................................................... 1
2. OPERATION CHART: MODULE QW-3721 ............................................... 2
3. DRAWINGS: MODULE QW-3721
3-1. CIRCUIT DIAGRAM ...................................................................................... 8
3-2. CHECKING TERMINALS AND COMPONENTS .......................................... 9
4. EXPLODED VIEW: MODULE QW-3721 ................................................... 10
5. PARTS LIST: MODULE QW-3721 ............................................................ 11
6. PRECAUTIONS FOR REPAIR: MODULE QW-3721
6-1. AC (ALL CLEAR) AND REMOVING OF MODULE .....................................12
6-2. ACCURACY CHECKING ............................................................................. 12
6-3. SOLAR CELL-PCB ASS'Y CONTACT CHECKING....................................13
6-4. TIME CALIBRATION SIGNAL TEST MODE ............................................... 13
6-5. SECOND HAND MOVEMENT ACCURACY CHECK MODE ...................... 13
7. TROUBLESHOOTING: MODULE QW-3721.............................................14
1. SPECIFICATIONS: MODULE QW-3721
Item Detail
Battery CTL1025 (Storage battery)
Note: Use CTL1025 only. Other storage battery or CR1025 can cause
damage to the watch.
Battery life Approx. 4 months
Current consumption 0.53 µA maximum: Follow the procedure described below to measure the
current consumption. Energize while pressing the B button.
Release energizing after releasing the B button.
Alarm system Piezo plate on Cover/Back
Accuracy ±20 sec./month
Accuracy setting system Chip capacitor selection
Accuracy checking See page 12
Functions • Solar powered
• Time calibration signal reception
Auto receive
Manual receive
• Time Calibration Signal
Receivable Time Calibration Signals
Fukushima, Japan (Call Sign: JJY, Frequency: 40kHz)
Fukuoka/Saga, Japan (Call Sign: JJY, Frequency: 60kHz)
• Low battery warning display
• Auto-calendar
• Regular timekeeping:
Analog: 3 hands (Hour, minutes, seconds)
• LED light (with full auto light function)
• Daily alarms
— 1 —
2. OPERATION CHART: MODULE QW-3721
Alarm Mode
OFF
ON
Use this mode to check if
signal reception is being
performed normally.
The second hand will move
to either “GET” or “NG”.
Receive Result Mode
Use this mode to adjust
the home positions of
the analog hands.
The home positions of the
hands are correct when
they point to 12 o’clock.
Use this mode to set the alarm time and to turn
the alarm on or off.
The second hand will move to either “ON” or “OFF”.
Receive
Successful
Home Position Adjustment Mode
Receive Failed
Time
Exposure
6 minutes
Approximate
(50,000 lux)
The following is the daily
•
Required Daily Charging Time
Charging Guide
(Brightness)
amount of charging required
each day to support the
operations under “Daily Use”.
Exposure Level
Outdoor Sunlight
Illumination: 1.5 second
Alarm: 10 seconds
•••
Starting from a full charge, the watch
should be able to continue operating
Daily Use
for about four months without further
charging under the conditions
described below.
Depending on the light source you are using, the
case of the watch may become quite hot during
30 minutes
Sunlight Through a
Window (10,000 lux)
Signal reception: 1
charging. Take care to guard against burn injury
after charging.
8 hours
48 minutes
(5,000 lux)
Overcast Day
Lighting (500 lux)
a Window on an
Indoor Fluorescent
Daylight Through
Approximate Exposure Time
Exposure Level
Charge Times Required to Advance to a Higher Level
operation.
•
Making sure the watch is regularly
exposed to light ensures stable
12 hours
61 hours
Full Charge
1 hour
2 hours
Timekeeping Restored
(50,000 lux)
(Brightness)
Outdoor Sunlight
Sunlight Through a
Window (10,000 lux)
Daylight Through a Window on
Solar Cell
– – –
– – –
3 hours
30 hours
Lighting (500 lux)
Indoor Fluorescent
Note that the above charging times are for reference only. Actual
an Overcast Day (5,000 lux)
charging time depends on a variety of environmental factors.
•
Minute Hand
Hour Hand
Button
(Light)
Date
nd
econd Ha
S
Button
(Mode Change)
Charging Precautions
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
heat
Avoid charging the watch in the following locations, and anywhere
else where the watch may become very hot.
•
•
■■
To ensure stable operation, be sure to allow the watch to be exposed to light as
much as possible.
•
To charge the battery
Remember that even a partial blockage of the solar cell reduces
Example: Positioning the watch
charging efficiency.
Point the solar cell (face) of the watch at a light source to charge
the battery.
•
■
Auto and manual
calibration signal
reception
Face illumination
movement.••
Alarm
•
Indicates date home position.
Jumps two seconds1-second movement
The following
operations are disabled
during 2-second hand
Important!
Hands
stop at 12
o’clock.
Battery level
drops further
due to
insufficient
charging.
The illustration shows the resin band model.
•
BB
BB
B button sounds a confirmation tone and cycles through available modes in the sequence shown below.
Timekeeping Mode
Modes and Hand Movement
The watch will revert to the Timekeeping Mode automatically if you leave it in any other mode without performing any operation for about two
or three minutes.
Each press of the
•
Battery level
drops due to
insufficient
charging.
If the time setting is not correct...
Normally, you should never need to adjust the time setting of the watch as long as it is
able to receive a time calibration signal. If signal reception is impossible for some reason,
use the procedures under “Adjusting the Home Positions” to check the home positions of
the hands, and make adjustments as required.
Power Supply
A low battery can cause timekeeping to stop, and can also cause time and alarm settings to be lost.
Face illumination or alarm operation can cause hand movement to stop due to the sudden temporary drop in battery power. This does not
indicate malfunction, and normal operation will resume when the watch is exposed to light. Though hand movement stops, timekeeping
The power supply of this watch uses a solar cell to generate electrical power, which is stored by a rechargeable battery. Using or storing
continues internally, and the hands will be adjusted to the correct setting when normal operation returns.
the watch where it is not regularly exposed to light, or allowing it to be blocked from light by your sleeve for long periods as you are
wearing it can cause the power of the rechargeable battery to run down.
•
•
Normal Low Power Alert Timekeeping Disabled
Checking the Battery Level
Low battery power is indicated when the the second hand starts to jump at two-second intervals.
■
— 2 —
). If battery power drops to the next lower level, and the hands will stop at 12 o’clock.
Keep the watch exposed to light until normal operation returns.
Even after the battery drops to the level that timekeeping becomes disabled, you will be able to resume normal operation by charging the
After timekeeping becomes disabled, the hands will move to the current time after the battery is recharged sufficiently.
battery.
If 2-second hand movement is being performed when the current time reaches midnight, the date indicator will change to the home
position indicator (
•
•
•
Near high-voltage lines
Next to a household
appliance or office equipment
(TV, speaker, fax, computer,
cell phone, etc.)
Near mountains
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
sleeve covers the face of the watch.
• The face may not illuminate immediately when you angle the
Auto Light Precautions
• Frequent use of the auto light can run down the battery.
• The auto light switch may cause the face to illuminate when your
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
Positioning Your Arm Correctly
1
• The face may illuminate unintentionally when you wear the watch
• The auto light switch is disabled automatically during 2-second
• The face remains illuminated for 1.5 seconds only, even if you
• Keep the auto light switch turned off whenever you are wearing
At least40degrees
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 face illumination.
hand movement.
leave the watch angled towards your face.
watch towards your face. This does not indicate malfunction.
to your side and then raise it to your face for reading.
the watch on the inside of your wrist.
• Electro-static charge and magnetism can interfere with auto light
right (3 o’clock) sides of the watch are
within ±15 degrees of being parallel
when using the auto light switch.
• You should be wearing the watch on the outside of your wrist
• Make sure that the left (9 o’clock) and
with the ground. The auto light switch
may not operate properly if the angle is
greater.
sunlight.
face is illuminated, illumination will turn off.
• If you press the B button or if an alarm operation starts while the
Important!
• The light may be difficult to see if you turn it on under bright
Location
Reception Range
is receiving the calibration signal.
Reception is difficult and may even be impossible in the locations
described below. Avoid such locations when performing signal
reception.
• You should think of your watch operating like a radio or TV when it
1000km
Transmitter Locations
This watch is designed to receive either the Mt. Otakadoya signal
(40kHz) or the Mt. Hagane signal (60kHz), whichever is strongest.
Among or near buildings
(40kHz)
Mt. Otakadoya
500km
500km
(60kHz)
Mt. Hagane
Inside a vehicle
(automobile, train, plane, etc.)
1000km
receivable up to 1,000 kilometers from the transmitter. Note
that the wave is relatively weak at distances greater than
500km, so reception may be poor at long distances.
• Under optimum conditions, the calibration signal should be
If you are experiencing problems with reception, move away
from the types of locations described above to a location with
In a location where there is
radio interference (construction
time of day, can even make reception impossible even when you
are within the range of the transmitter.
• Geographic contours, nearby buildings, seasonal conditions, the
• Reception is best at night.
better reception, and try again.
site, airport, etc.)
The auto light switch does not illuminate the face when
To illuminate the face with the auto light
switch
■
Face Illumination
An LED light is used to illuminate the face of the watch for easy
reading in the dark. An auto light switch automatically illuminates
the face when you angle the watch towards your eyes for reading.
surrounding light is bright.
The auto light switch automatically illuminates the face
whenever you angle the watch towards your eyes for reading,
but only when it is dark.
•
AA
AA
A button.
To illuminate the face manually
In the Timekeeping Mode,
press the
■
To turn the auto light switch on and off
The auto light switch will illuminate the face for about 1.5
seconds in any mode.
This illuminates the face for
about 1.5 seconds.
•
In the Receive Result Mode, hold down the A button for about
■
three seconds to toggle the auto light switch on and off.
You may hear a faint rattling sound when you move the watch
around. This sound is caused by the movement of a metal
bulb that controls operation of the auto light switch, and does
Pressing the A button illuminates the display regardless of
whether the auto light switch is on or off.
•
not indicate malfunction.
— 3 —
Note that transmission of the time calibration signal may be
the National Institute of Information and Communications
Technology (NICT). It is a long wave signal transmitted 24 hours a
day from the Mt. Otakadoya transmitter (40kHz) located in
Calibration Signal
Tamura-gun, Fukushima Prefecture, and from the Mt. Hagane
• The Japanese calibration signal (Call Sign: JJY) is maintained by
How a Radio-controlled Watch Works
What is a radio-controlled watch?
Your radio-controlled watch is designed to receive a time
calibration signal that contains standard time data, and adjust its
current time setting accordingly.
interrupted occasionally due to maintenance, lightning, etc.
transmitter (60kHz) located on the border between Saga
Prefecture and Fukuoka Prefecture.
Time is adjusted
according to
to time data.
Decode
Time data
Cesium
time data.
Internally
atch
W
atomic clock
After the watch receives the Standard Time 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.
Watch decodes
received data
and converts it
Signal is received using
built-in antenna.
Signal data
Long-wave
time
calibration
signal
Transmitter
Auto reception can be performed while the watch is in the
If the hands become misaligned for some reason, they may not
Pressing any button while auto reception is in progress will cause
Make sure you are within the range of the calibration signal
Proper reception may be impossible if there is something blocking
Timekeeping Mode only.
indicate the correct time, even if the time calibration signal is
received normally. If this happens, use the procedure under
“Adjusting the Home Positions” to adjust the home positions of the
hands and the date.
the watch to beep and signal reception to stop.
Calibration Signal Reception
Precautions
•
•
transmitter before performing the reception operation. Remember
•
•
This watch is designed to adjust its current time setting in
that geographic contours, nearby buildings, seasonal conditions,
the time of day, can even make reception impossible even when
you are within range of the transmitter.
the signal. If reception is unsuccessful, try again.
•
•
BB
BB
B button twice
Press the
When the watch is unable to receive the time calibration signal for
Strong electrostatic charge can cause timekeeping error.
Signal reception is cancelled if the alarm starts to sound while it is
accordance with the calibration signal transmitted in Japan only. It
operates like a standard (non-radio controlled) watch outside of
the range of the receivable time calibration signal transmitters.
The watch’s calendar shows dates up to the year 2099.
some reason, timekeeping accuracy is within ±20 seconds per
month.
being performed.
Attempting a receive operation after that causes an error.
•
•••
to return to the
5.
Timekeeping Mode.
This causes the second hand
to move to the seconds count
of the current time and
resume normal movement.
•
OFF
ON
To turn the alarm on or off
If you do not perform any button operation for about two or three
minutes, the watch will exit the setting mode and resume normal
hand movement.
•
AA
AA
In the Alarm Mode, press the
A button to toggle the alarm
on and off.
■
To stop the alarm beeper
Pressing any button while the beeper is sounding stops it.
■
BB
BB
B button. This enters
To check the result of the last signal
receive operation
■
Time Required for Reception
A calibration signal receive operation takes anywhere from about
two to seven minutes.
■
operation since midnight, the second hand will move to GET. If
the watch has been unable to receive any signal successfully, the
second hand will move to NG.
times.
The watch will also return to the Timekeeping Mode if you do not
In the Timekeeping Mode, press the
the Receive Result Mode.
• If the watch was able to perform a successful signal receive
BB
BB
B button for about
To perform manual receive
In the Timekeeping Mode, hold
down the
■
perform any operation for about two or three minutes.
• To return to the Timekeeping Mode, press the B button three
•
To interrupt reception
The watch will beep, and signal
reception will start.
two seconds.
•
■
When reception starts
Press any button.
The second hand moves to READY.
■
GET
NG
The current receive result is cleared each day at midnight.
This means GET indicates successful signal reception since
the start of the current day.
During reception
The hour and minute hands continue to keep time normally.
•
■
After reception is complete
The hour and minute hands continue to keep time normally.
Do not move the watch until calibration signal reception is complete.
•
•
The second hand moves to WORK.
■
BB
BB
AA
AA
A button.
To set the alarm time by moving the hands
receive fails after auto receive is successful.
• GET continues to be indicated even if an attempt at manual
If reception is successful, the second hand will move to GET. One
or two minutes later, the hands will move to the correct time.
If reception is not successful, the second hand will move to NG
(No Good). One or two minutes later, the second hand will resume
•
•
counterclockwise
This will cause the minute hand
Press the
3-b
•
normal operation, without any adjustment of the hand setting.
B button.
to move counterclockwise about
one or two minutes, and then
Set the alarm time you want.
3.
Each press of the B button
stop around 12 o’clock.
Press the
•
clockwise, go to step 3-a.
counterclockwise, go to step 3-b.
• If you want to set the alarm time by moving the hands
• If you want to set the alarm time by moving the hands
AA
AA
When the setting is the
way you want, press the
A button.
This will cause the hour and
minute hands to move to the
current time, and the second
hand to move to “ON” (alarm
on).
Setting the alarm time causes
moves the setting
counterclockwise by one minute.
Holding down the B button for about two seconds moves the
hands counterclockwise at high speed. High-speed movement of
the hands will continue until it completes a 12-hour cycle, or until
you press any button to stop it.
•
the hour hand moves past 12 o’clock while you are setting
the alarm time.
When setting the alarm time, take care to set AM and PM
correctly.
• The second hand will move between AM and PM any time
To set the alarm time by moving the hands
3-a
•
4.
BB
BB
B button.
clockwise
Each press of the B button
moves the setting clockwise by
one minute.
Press the
•
the alarm to turn on
•
Holding down the B button for
about two seconds moves the
hands clockwise at high speed.
High-speed movement of the
hands will continue until it
completes a 12-hour cycle, or until
•
automatically.
button to advance to step 4.
you press any button to stop it.
• After the alarm time setting is the way you want, press the A
1:00, 2:00, 3:00, 4:00 and 5:00 each morning.)
To position the watch for optimum
reception
Receiving the Calibration Signal
There are two methods you can use to receive the time calibration
operations for that day are not performed.
signal.
Auto receive (Reception is performed automatically at midnight,
Manual receive (You initiate reception using a button operation.)
• When any auto receive is successful, further auto receive
• Successful auto receive keeps timekeeping accurate.
Remove the watch from your wrist and place it somewhere so its
right side (9 o’clock side, where the antenna is located) is facing a
window.
■
9 o’clock
side
PM
AM
Or
Using the Alarm
• Do not move the watch while it is receiving the calibration signal.
OFF
ON
BB
BB
B button twice
In the Timekeeping Mode,
press the
to enter the Alarm Mode.
The second hand will move to
either “ON” (alarm on) or
To set an alarm time
You can set an alarm time in 1-minute units. The watch beeps for 10 seconds when the alarm time is reached.
1.
■
“OFF” (alarm off).
•
Example: Midnight
AA
AA
A button
Hold down the
for five seconds to display
the setting screen.
The second hand will move to
“AM” or “PM”.
Note that the hands do not
move while the alarm setting
•
2.
•
screen is on the display.
— 4 —
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