Casio MTG-950BDJ Service Manual & Parts List
SERVICE MANUAL
& PARTS LIST
REF. NO. S/M-901
JUL. 2005
MODULE NO.
QW-2819
MTG-950BDJ
R
(WITHOUT PRICE)
CONTENTS
Page
1. SPECIFICATIONS: MODULE QW-2819 .................................................... 1
2. OPERATION CHART: MODULE QW-2819 ............................................... 2
3. DRAWINGS: MODULE QW-2819
3-1. LCD DIAGRAM ............................................................................................. 9
3-2. CIRCUIT DIAGRAM .....................................................................................10
3-3. CHECKING TERMINALS AND COMPONENTS .........................................11
4. EXPLODED VIEW: MODULE QW-2819 ................................................... 12
5. PARTS LIST: MODULE QW-2819 ............................................................ 13
6. PRECAUTIONS FOR REPAIR: MODULE QW-2819
6-1. AC (ALL CLEAR) AND REMOVING OF MODULE ..................................... 14
6-2. ACCURACY CHECKING .............................................................................14
6-3. SOLAR CELL-PCB ASS'Y CONTACT CHECKING....................................15
6-4. HOW TO CHECK TILT SENSOR.................................................................15
7. TROUBLESHOOTING: MODULE QW-2819.............................................16
1.
SPECIFICATIONS: MODULE QW-2819
Item Detail
Battery CTL1616 (Storage battery)
Note: Use CTL1616 only. Other storage battery or CR1616 can cause
damage to the watch.
Battery life Approx. 6 month (from full charged condition)
Current consumption 2.698 µA maximum
Alarm system Piezo plate on Cover/Back
Accuracy ±15 sec./month
Accuracy setting system Trimmer capacitor
Accuracy checking See page 14
Functions
Accuracy at normal
temperature: ±15 seconds a month (with no signal calibration)
Timekeeping: Hour, minutes, seconds, a.m. (A)/p.m. (P), month, day,
day of the week Time system: Switchable between 12hour and 24-hour format
Calendar system: Full Auto-calendar pre-programmed from the year 2000
to 2099
Other: Home city cord (can be assigned one of 34 city cords);
Daylight Saving Time/Standard time
Time Calibration
Signal Receotion:
Receivable Time
World Time: 30 cities (29 time zones)
Other: Standard time/Daylight Saving Time, Home time (hour,
Time Recorder: Memory for 30 records, each containing hour, minutes,
Alarms:
Stopwatch
Measuring unit: 1/100 second
Measuring capacity: 23:59' 59.99"
Measuring modes: Elapsed time, split time, two finishes
Other: Backlight (electro-luminescent panel); Auto Light Switch
Battery: One rechargeable battery (type: CTL1616)
Approximate Battery life:
Auto Receive (four times per day, at 2:00 AM, 3:00 AM, 4:00
AM, and 5:00 AM); Manual Receive; Last Signal screen
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)
minutes, a.m. (A)/p.m. (P), and Standard time/Daylight
Saving Time)
seconds, a.m. (A)/p.m. (P), and Standard time/Daylight
Saving Time
Four one-time alarms; one snooze alarm; Hourly Time Signal
(Full Auto EL light operates only in the dark);
Battery power indicator; Power Saving function
Use only the type of battery specified by CASIO. Never
use a different battery type. The wrong type of battery
can damage the watch.
6 months (from full charge to Level 3 when the watch is
not exposed to light) under the following conditions:
•
Display on 18 hours per day, sleep state 6 hours per day
• 1 backlight operation (1.5 seconds) per day
• 10 seconds of alarm operation per day
• 4 times calibration reception per day
— 1 —
2. OPERATION CHART: MODULE QW-2819
Mode Indicator
City Code
World Time Mode Recall Mode
Alarm Number
Stopwatch Mode Alarm Mode
Place the watch in an area that is well-lit, press any button, or
angle the watch toward your face to illuminate the display using
you place the watch in a well-lit area.
the Auto Light.
• It can take up to two seconds before the display re-appears after
■ To turn Power Saving on and off
Use the procedure under “Setting the Time and Date Manually” to
■ To recover from the sleep state
Leaving the watch in a drawer or anywhere else it is dark can
cause Power Saving to trigger in order to conserve battery
power.
turn Power Saving on or off.
any operation for about two or three minutes.
• The watch will automatically revert to the Timekeeping Mode if you leave it in the Alarm Mode or Recall Mode without performing
• Entering the Alarm Mode displays an alarm number, “SNZ” (snooze alarm), or “SIG” (hourly time signal).
Day of the Week
Battery Indicator
Timekeeping Mode
Hour, minute,
BButton
AButton
PM indicator
second
(no display for AM)
DButton
CButton
Month, day
(Light)
LButton
Mode Indicator
SUN : Sunday MON : Monday TUE : T uesday
WED : Wednesday THU : Thursday FRI : Friday
Days of the Week
SAT : Saturday
Sleep indicator
Alarms and the hourly time signal continue to operate normally
while the watch is in the display sleep state.
Power Saving
The Power Saving feature of the watch is turned on at the factory.
• Power Saving causes the watch to automatically enter a sleep stage to save power whenever the watch is left in the dark.
• Note that the watch may also enter the sleep state if the watch is blocked from light by your sleeve.
The display sleep state is triggered whenever the watch is left in the
■ How the sleep state works
• Display sleep state
dark for about one hour between the hours of 10 p.m. and 6 a.m.
Stopwatch Mode.
• The display goes blank, except for a sleep indicator flashing on it.
• The watch does not enter the sleep state if it is in the
also disabled while the watch is in the function sleep state.
the function sleep state.
• The sleep indicator stops flashing and remains on the display.
• Alarms, the hourly time signal, and auto signal reception are
The function sleep state is triggered whenever the watch is left in the
• Function sleep state
• Digital timekeeping functions continue to operate normally in
dark for six or seven days.
— 2 —
Memo number
The display shows the contents of the record for
about two seconds, after which the normal
Timekeeping Mode display reappears. •Use the following procedure to recall lap/split
time memory contents. See “To view Time Stamp
Modes and Display Screens
Time Stamp (Time Memo)
Holding down the B button for about one
second in the Timekeeping Mode creates a
•
record containing the current date (month and
day) and time (hour, minute, second) in
memory. Storage of the record is indicated by
the watch beeping.
records” for more information.
Hour, minute,
second
Month, day
Approximate
Charging Time
(Brightness)
Exposure Level
The following is the daily
amount of charging required
each day to support the
operations under “Daily Use”.
Required Daily Charging Time
•
5 minutes
24 minutes
(50,000 lux)
(10,000 lux)
Outdoor Sunlight
Daylight Through a Window
Sunlight Through a Window
8 hours
48 minutes
(500 lux)
(5,000 lux)
on a Cloudy Day
Indoor Fluorescent Lighting
Approximate Charging Time
Level 4 \ Level 3 \ Level 2 \ Level 1
14 hours1 hour 3 hours
70 hours3 hours 14 hours
28 hours
143 hours
5 hours
––– –––
57 hours
seconds
Daily Use (All time values are
approximate.)
• Display Illumination: 1.5
• Alarms: 10 seconds
• Signal reception: 4 times
■ Charging Guide
Starting from a full charge, it
should take approximately six
months of operation without
further charging under the
conditions described below before
battery drops to Level 3.
■ Charging Precautions
heat
Avoid charging the watch in the following locations, and anywhere
else where 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
temperatures. This is temporary, and the display will appear
All functions enabled.
All functions enabled.
• Digital display: 18 hours
.
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.
normal again at lower temperatures
Display, display illumination, alarms,
hourly time signal, and signal
reception disabled.
Making sure the watch is
regularly exposed to light ensure
stable operation.
• Charge Times Required to Advance to a Higher Level
charging efficiency.
■ The change 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
All functions, including digital
timekeeping, disabled.
(Brightness)
Exposure Level
Outdoor Sunlight
Example: Positioning the watch
(50,000 lux)
Sunlight Through a
Window (10,000 lux)
Solar Cell
Day (5,000 lux)
Daylight Through a
Window on a Cloudy
charging time depends on a variety of environmental factors.
Lighting (500 lux)
Indoor Fluorescent
• Note that the above charging times are for reference only. Actual
• The illustration shows the resin band mode.
display of the watch is shade by your sleeve.
Auto Light Precautions
watch towards your face. This does not indicate malfunction.
• Frequent use of the auto light can run down the battery.
• The auto light switch may cause the display to illuminate when the
• The display may not illuminate immediately when you angle the
• The display remains lit for about 1.5 seconds only, even if you
Rotate your arm so the watch is
angled at about 40 degrees, so you
can read its face.
2
With the watch on your
wrist, position it parallel
with the ground.
■ To illuminate the display
1
h
leave the watch angled towards your face.
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 display illumination.
the watch on the inside of your wrist.
• Keep the auto light switch turned off whenever you are wearing
• Electro-static charge and magnetism can interfere with auto light
• You should be wearing the watch on the outside of your wrist
operation and even make operation impossible. If this happens,
• The display may illuminate unintentionally when you wear the
At least
40°
when using the auto light switch.
lower your arm to the starting position and then raise it again. If
• Make sure that the left (9 o’clock) and
you still have trouble with display illumination, try lowering your
arm down to your side and then raise it to your face for reading.
right (3 o’clock) sides of the watch are
within ±15 degrees of being parallel
with the ground. The auto light switch
may not operate properly if the angle is
sunlight.
greater
Display Illumination Precautions
• The light may be difficult to see if you turn it on under bright
Auto Light Switch
On Indicator
display is illuminated, illumination will turn off.
• If you press the L button or if an alarm operation starts while the
• You may notice a slight sound from the watch while the display is
illuminated. This is the sound of EL panel vibration, and does not
indicate malfunction.
(Off)
Level 1
Level 2
Level 3
Level 4
■ 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
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
Note that all data in memory and all settings are cleared
whenever you allow the level of the rechargeable battery to
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.
drop to Level 4.
cause the battery level indicator to momentarily indicate a level
• Exposing the watch to direct sunlight or other strong light may
■ Flashing Recovery Indicator
If you use the light or alarms a number of times during a short
that is higher than the actual battery level. Because of this, you
should wait for a short while after charging to check the battery
period, a Recovery indicator flashes on the display and the
following operations become disabled as battery power recovers.
level indicator.
• Display illumination
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 the Level
• Even if the battery level drops all the way to Level 4, you will still
• Alarm and hourly time signal
2 or Level 1.
• When recharging from Level 4, set the current time and date after
Recovery Indicator
• Time calibration signal reception
■ 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
Normal operation will return after the battery recovers.
— 3 —
possible after the Level 3 indicator starts to flash.
when surrounding light is bright.
The light is very convenient when reading the current time
and other data in the dark.
The full auto light switch automatically illuminates the display
whenever you angle the watch towards your face for reading,
Illuminating the Display with the
but only when it is dark.
Auto Light Switc
Display Illumination
An EL (electro luminescent) panel is used to illuminate the display
for easy reading in the dark. An auto light switch automatically
illuminates the display when you angle the watch towards your
face for reading.
■ To illuminate the display manually
The auto light switch illuminates the display in all modes.
• The full auto light switch does not illuminate the display
LL
LL
L button in any
Pressing the
mode illuminates the digital
In the Timekeeping Mode, hold down the L button for about two
seconds to toggle the auto light switch on (auto light switch on
indicator displayed) and off (no indicator displayed).
.
display for about 1.5 seconds.
illuminates the display regardless
of whether the auto light switch is
on or off
• Pressing the L button
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
not indicate malfunction.
When the auto light switch is on, holding down the L button for
about two seconds turns the auto light switch off (auto light switch
indicator not displayed).
Transmitter
3000km
1000km
Fort Collins
Transmitter Location
receivable up to 3,000 kilometers from the transmitter.
1,000km, so reception may be poor at long distances.
• Under optimum conditions, the calibration signal should be
• Note that the wave is relatively weak at distances greater than
■ Receive icon
The receive icon cycles from
“Unstable” through “Stable” as
shown below while reception is in
progress. How far it cycles depends
on the signal strength. Keep the
watch in a location where reception
is stable while reception is in
progress.
Unstable Stable
determine the best location for signal reception.
• Use the receive icon to check reception status and to
seconds for reception to stabilize.
• Even under optimum reception conditions, it can take about 10
factors can all affect reception.
• Note that weather, the time of day, surroundings, and other
Either the Mt. Otakadoya signal (40kHz) or the Mt.Hagane signal (60kHz)
Fort Collins, Colorado signal
TYO
Home City
LAX, DEN, CHI, NYC
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 “Setting the Time and Date Manually”
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
transmitter (40kHz) located in Tamura-gun, Fukushima Prefecture,
and from the Mt. Hagane transmitter (60kHz) located on the
Calibration Signal
• The Japanese calibration signal (Call Sign: JJY) is maintained by
border between Saga Prefecture and Fukuoka Prefecture.
• The U.S. calibration signal (Call Sign: WWVB) is transmitted by
Mt. Otakadoya
(40kHz)
1000km
500km
500km
Transmitter Location
the National Institute of Standards and technology from Fort
Collins, Colorado.
Mt. Hagane
, lightening, etc.
Though the calibration signal is normally transmitted 24 hours
a day, transmission may be interrupted occasionally due to
maintenance
1000km
(60kHz)
receivable up to 1,000 kilometers from the transmitter.
• Under optimum conditions, the calibration signal should be
500km, so reception may be poor at long distances.
• Note that the wave is relatively weak at distances greater than
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.
Receive icon
” icon flashes on
DD
DD
D button for about two
has started. The “
mode, signal reception can take up to 12 minutes.
the transmitter mode.
■ Time Required for Reception
Signal reception takes anywhere from about two to six minutes.
• Note that when “AUTO” is specified as the frequency selection
• See “Specifying the Transmitter Mode” for more information about
3:00, 4:00, and 5:00 each morning.)
• Auto reception (Reception is performed automatically at 2:00,
Receiving the Calibration Signal
There are two methods you can use to receive the time calibration
signal.
■ To trigger reception manually
Manual receive (You initiate reception using a button operation.)
•
need to do is to place it in a location that allows good reception
each night.
• The watch is set up for auto reception at the factory, so all you
In the Timekeeping Mode, hold
the display while signal reception is
down the
seconds until the watch beeps.
• This indicates that manual receive
■ To make reception easier
Remove the watch from your wrist and place it somewhere so its
top (12 o’clock side, where the antenna is located) is facing
approximately in the direction of the signal transmitter. Keep it
away from metal objects.
D D
D D
D button.
in progress.
Press the
■ To stop signal reception
are disabled during signal reception.
D
” icon on the display also indicates successful signal reception.
” icon is cleared from the display each day at 3:00 a.m.
• All other buttons besides
When reception is successful
Resin band
The “
The watch terminates reception and adjusts the current time. Next
it beeps and then displays the date and time the adjustment was
performed.
• The “
if you do not perform any operation for about one or two minutes.
• The display will return to the normal timekeeping screen automatically
When reception fails
The watch does not adjust its current time setting, and displays
“ERR” instead.
Metal band
more difficult to receive the signal.
• Orienting the watch so it is sideways to the transmitter makes it
• Do not move the watch while it is receiving the calibration signal.
Watch decodes
received data and
converts it to time
data.
Time is adjusted
Signal is received using
built-in antenna.
Long-wave time
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
Transmitter
current time setting accordingly.
tion signal
calibra
Decode
Signal data
Time data
according to time
data.
Internally
Watch
Cesium
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
Near high-voltage linesAmong or near buildings
time.
is receiving the calibration signal.
Location
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
Next to a household appliance
or office equipment
(TV, speaker, fax, PC, mobile
phone, etc.)
Inside a vehicle
(automobile, train, plane, etc.)
Near mountains
If you are experiencing problems with reception, move away
In a location where there is radio
interference
(construction site, airport, etc.)
from the types of locations described above to a location with
better reception, and try again.
— 4 —
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