Casio QW-2812 Service Manual & Parts Manual
SERVICE MANUAL
& PARTS LIST
REF. NO. S/M-848
FEB. 2004
MODULE NO.
QW-2812
WVH-500D
Ver.1 : Apr. 2004
R
(WITHOUT PRICE)
CONTENTS
Page
1. SPECIFICATIONS: MODULE QW-2812 .................................................... 1
2. OPERATION CHART: MODULE QW-2812 ............................................... 2
3. DRAWINGS: MODULE QW-2812
3-1. LCD DIAGRAM ............................................................................................. 7
3-2. CIRCUIT DIAGRAM ...................................................................................... 8
3-3. CHECKING TERMINALS AND COMPONENTS .......................................... 9
4. EXPLODED VIEW: MODULE QW-2812 ................................................... 10
5. PARTS LIST: MODULE QW-2812 ............................................................ 11
6. PRECAUTIONS FOR REPAIR: MODULE QW-2812
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
7. TROUBLESHOOTING: MODULE QW-2812............................................. 14
1. SPECIFICATIONS: MODULE QW-2812
Item Detail
Battery CTL1616 (Storage battery)
Note: Use CTL1616 only. Other storage battery or CR1616 can cause
damage to the watch.
Battery life Approx. 7 months (from full charged condition)
Current consumption 1.273 µA maximum
Alarm system Piezo plate on Cover/Back
Accuracy ±15 sec./month
Accuracy setting system Trimmer capacitor
Accuracy checking See page 12
Functions • Electro-luminescent backlight
Afterglow
• Solar powered
• Time calibration signal reception
Auto receive
Manual receive
Last date/time received display
• Time Calibration Signal
Receivable Time Calibration Signals
Mainflingen, Germany (Call Sign: DCF77, Frequency: 77.5kHz)
• e-DATE MEMORY
Meomory capacity: Up to 40 records for Internet access codes and other
data (when there are 7characters per record), actual number of records
depends on the number of characters per record
• World Time
29 time zones (30 cities), daylight saving time on/off
• 1/100-sec. stopwatch
Measuring capacity: 99’59.99"
Measuring modes: Elapsed time, split time, 1st-2nd place times
• Daily alarms
3 independent daily alarms
• Hourly time signal
• Low battery warning display
• Auto-calendar (to year 2039)
• 12/24-hour format
• Regular timekeeping:
Digital: Hr, min, sec, am/pm, month, date, day
— 1 —
2. OPERATION CHART: MODULE QW-2812
Getting Acquainted
Congratulations upon your selection of this CASIO watch. To get the most out of your
purchase, be sure to carefully read this manual and keep it on hand for later reference
when necessary.
Expose the watch to bright light to charge its battery before using it.
You can use this watch even as its battery is being charged by exposure to bright
light.
• Be sure to read “Battery” of this manual for important information you need to
know when exposing the watch to bright light.
If the display of the watch is blank...
Power saving indicator
If the Power Saving indicator (PS) is on the display (either
flashing or steady), it means that the display is blank
because the watch’s Power Saving function has turned it
off to conserve power. Power Saving automatically turns
off the display and enters a sleep state whenever your
watch is left for a certain period in an area where it is
dark.
• The initial factory default setting is Power Saving on.
• The watch will recover from the sleep state if you move it
to a well-lit area or if you press any button.
• See “Power Saving Function” for more information.
About This Manual
• Button operations are indicated using the letters shown
in the illustration.
• Each section of this manual provides you with the
information you need to perform operations in each
mode. Further details and technical information can be
found in the “Reference” section.
General Guide
• Press C to change from mode to mode.
• In any mode, press B to illuminate the display.
Timekeeping Mode
Press C.
World Time Mode
▲
▲
Radio-controlled Timekeeping
PM indicator
Hour : Minutes
DST indicator
Month – Day
Day of week
Current Time Setting
This watch automatically adjusts its time setting in accordance with a time calibration
signal. You can also perform a manual procedure to set the time and date, when
necessary.
• The first thing you should do after purchasing this watch is to set your Home City,
which is the city where you will normally use the watch. For more information, see
“To set your Home City” below.
• When using the watch in an area that is outside of the range of the transmitter in
Mainflingen, you need to manually adjust the time as required. See “Timekeeping”
for information about manual settings.
To set your Home City
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City code
• The first press of A displays the 12/24-hour setting screen. Pressing A again exits
the setting screen.
• Normally, your watch should show the correct time as soon as you select your Home
City code. If it does not, it should adjust automatically after the next auto receive (in
the middle of the night). You can also perform manual receive or you can set the time
manually.
• If you are in an area that does not use Daylight Saving Time (summer time), turn off
the DST setting.
This watch receives a time calibration signal and updates
its time setting accordingly. The time calibration signal
includes both Standard Time and Daylight Saving Time
(summer time) data.
• This watch is designed to pick up the time calibration
signal transmitted from Mainflingen, Germany.
Seconds
1. In the Timekeeping Mode, hold down A until the city
code starts to flash, which indicates the setting screen.
2. Use D (east) and B (west) to select the city code you
want to use as your Home City.
• The following are the city codes for major cities in the
Western Europe time zones.
LON
: London
PAR
and
BER
: Paris, Berlin, Milan, Rome,
Amsterdam, Hamburg, Frankfurt,
3. Press A twice to exit the setting screen.
Vienna
Alarm Mode
▲
▲
Data Memory ModeStopwatch Mode
▲
To display the last signal screen
In the Timekeeping Mode, press D to display the last signal screen (indicated by
GET
). The last signal screen shows the date and time of the last successful time
calibration signal reception.
DST indicator Hour : Minutes
PM indicator
Day of week Month – Day
Time Calibration Signal Reception
There are two different methods you can use to receive the time calibration signal:
auto receive and manual receive.
• Auto Receive
With auto receive, the watch automatically picks up the time calibration signal five
times a day at 0:00 a.m., 1:00 a.m., 2:00 a.m., 3:00 a.m., and 4:00 a.m. For more
information, see “About Auto Receive”.
• Manual Receive
Manual receive lets you start time calibration signal reception with the press of a
button. For more information, see “To perform manual receive ”.
Important!
• When getting ready to receive the time calibration signal, position the watch as
shown in the nearby illustration, with its 12 o’clock side facing towards a window.
Make sure there are no metal objects nearby.
• The watch should not be on its side or facing the wrong way.
• Proper signal reception can be difficult or even impossible under the conditions listed
below.
Resin Band
Seconds
Press D.
▲
Metal Band
▲
Received time
(Hour : Minutes)
Received date (Month – Day)
Last Signal Screen
— 2 —
Inside or
among
buildings
Inside a
vehicle
Near
household
appliances,
office
equipment,
or a mobile
phone
Near a
construction
site, airport, or
other sources
of electrical
noise
Near hightension
power lines
Among or
behind
mountains
• Signal reception is normally better at night than during the day.
• Time calibration signal reception takes from two to seven minutes. T ake care that
you do not perform any button operations or move the watch during this time.
1,000 kilometers
500 kilometers
• This watch is designed to receive the time calibration signal transmitted from
Mainflingen, Germany. Signal reception is possible within the area represented by a
circle with a radius of about 1,000 kilometers.
• At distances further than about 500 kilometers from a transmitter, signal reception
may not be possible during certain times of year or times of day. Radio interference
may also cause problems with reception.
• See the information under “Signal Reception Troubleshooting” if you experience
problems with time calibration signal reception.
About Auto Receive
When auto receive is turned on, the watch automatically starts to receive the time
calibration signal when the time in the Timekeeping Mode reaches 0:00 a.m., 1:00
a.m., 2:00 a.m., 3:00 a.m., and 4:00 a.m. each day (calibration times). The watch will
also perform an additional auto receive at 5:00 a.m. if none of the regularly scheduled
auto receive are successful.
Note
• Auto receive is performed only if the watch is in the Timekeeping Mode or World
Time Mode when one of the calibration times is reached. It is not performed if a
calibration time is reached while an alarm is sounding, or while you are configuring
settings (while settings are flashing on the display).
• Auto receipt of the calibration signal is designed to be performed early in the
morning, while you sleep (provided that the Timekeeping Mode time is set correctly).
Before going to bed for the night, remove the watch from your wrist, and put it in a
location where it can easily receive the signal.
• When auto receive is turned on, the watch receives the calibration signal for two to
seven minutes everyday when the time in the Timekeeping Mode reaches each of
the five calibration times. Do not perform any button operation within seven minutes
before or after any of the five calibration times. Doing so can interfere with correct
calibration.
• Remember that reception of the calibration signal depends on the time kept in the
Timekeeping Mode. The reception will be performed whenever the display shows
one of the five calibration times, regardless of whether or not the Timekeeping Mode
time is actually the correct time.
• When two, three, four, or five receptions are successful, the watch uses the data of
the last reception for calibration. When only one reception is successful, the watch
uses the data of the successful reception.
About the Receiving Indicator
The receiving indicator shows the strength of the calibration signal being received. For
best reception, be sure to keep the watch in a location where signal strength is
strongest.
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Receiving indicator
• Even in an area where signal strength is strong, it takes about 10 seconds for signal
reception to stabilize enough for the receiving indicator to indicate signal strength.
• Use the receiving indicator as a guide for checking signal strength and for finding the
best location for the watch during signal reception.
• The Level 4 receiving indicator remains on the display in all modes following
reception of the time calibration signal and calibration of the watch’s time setting.
The Level 4 receiving indicator is not displayed if signal reception was unsuccessful
or after manual adjustment of the current time setting.
• The Level 4 receiving indicator indicates that at least one of the five calibration
signal reception was successful. Note, however, that the Level 4 receiving indicator
is cleared from the display at 3:00 a.m. each day.
To perform manual receive
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Receiving indicator
• Time calibration signal reception normally takes from two to seven minutes. Take
care that you do not perform any button operations or move the watch during this
time.
• After signal reception is complete, the display of the watch changes to the last signal
screen.
Note
• To interrupt a reception and return to the Timekeeping Mode, press D.
• If the reception is unsuccessful, the message
one or two minutes. After that, the watch returns to the Timekeeping Mode.
• You can also change from the last signal or
screen by pressing D.
Weak
(Level 1)
1.Place the watch on a stable surface so its top (12
o’clock side) is facing towards a window.
2.In the Timekeeping Mode, hold down D for about two
seconds until the watch beeps.
3.Release D and RC! flashes to indicate that signal
reception has started.
ERR
ERR
Mainflingen
Strong
(Level 4)
appears on the display for about
screen to the normal timekeeping
To turn auto receive on and off
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On/Off status
Signal Reception Troubleshooting
Check the following points whenever you experience problems with signal reception.
Problem
Cannot
•
The watch is not in the Timekeeping
perform
manual
receive.
Auto
receive is
turned on,
but the
Level 4
receiving
indicator
does not
appear on
the display.
Time
setting is
incorrect
following
signal
reception.
• For further information, see “Important!” under “Time Calibration Signal Reception”
Mode.
•
Your current Home City is not one of
the following city codes: BER, PAR,
or LON.
•
You changed the time setting
manually.
•
The watch was not in the
Timekeeping or World Time Mode, or
you were performing some button
operation during auto receive.
•
Even if reception is successful, the
Level 4 receiving indicator disappears
every day at 3 a.m.
•
Time data (hour, minutes, seconds)
only was received during the last
reception. The Level 4 receiving
indicator appears only when time
data and date data (year, month, day)
are both received.
•
If the time is one hour off, the DST
setting may be incorrect.
•
The Home City code setting is not
correct for the area where you are
using the watch.
and “Radio-controlled Timekeeping Precautions”.
1.In the Timekeeping Mode, hold down A until the city
code starts to flash, which indicates the setting screen.
2.Press C twice to move the flashing to the auto receive
on/off setting.
3.Press D to toggle auto receive on (
• If the current Home City setting is a city code that
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does not support auto receive, “xx” appears in place
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of the on/off indicator. This means you cannot turn
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auto receive on or off.
4.Press A twice to exit the setting screen.
• For information about city codes that support signal
reception, see “To set your Home City”.
Probable Cause
What you should do
•
Enter the Timekeeping Mode and try
again.
•
Select BER, PAR, or LON as your
Home City.
•
Perform manual receive or wait until
the next auto receive is performed.
•
Check to make sure the watch is in a
location where it can receive the
signal.
•
Change the DST setting to Auto DST.
•
Select the correct Home City code.
On
) and off (
OFF
World Time
Timekeeping
Mode time
City code
Current time in the
selected city code
To view the time in another city
While in the World Time Mode, press D to scroll through the city codes (time zones).
• For full information on city codes, see the “City Code Table”.
To toggle a city code time between Standard Time and Daylight Saving Time
DST indicator
World Time shows the current time in 30 cities (29 time
zones) around the world.
• If the current time shown for a city is wrong, check your
Home City time settings and make the necessary
changes.
• The watch will perform a signal reception even if it is in
the World Time Mode when a calibration time is
reached. If this happens, the World Time Mode time
settings will be adjusted in accordance with the
Timekeeping Mode’s Home City time.
• All of the operations in this section are performed in the
World Time Mode, which you enter by pressing C.
1.In the World Time Mode, use D to display the city code
(time zone) whose Standard Time/Daylight Saving Time
setting you want to change.
2.Hold down A to toggle Daylight Saving Time (DST
displayed) and Standard Time (DST not displayed).
• Note that you cannot switch between Standard Time
and Daylight Saving Time while
city code.
• The DST indicator will appear on the display whenever
you display a city code for which Daylight Saving Time is
turned on.
• Note that the DST/Standard Time setting affects only the
currently displayed city code. Other city codes are not
affected.
GMT
is selected as the
Alarms
Timekeeping
Mode time
Alarm number
Alarm time
(Hour : Minutes)
To set an alarm time
Hourly time signal
on indicator
Alarm on
indicator
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You can set three independent Daily Alarms. When an
alarm is turned on, the alarm tone sounds when the alarm
time is reached. You can also turn on an Hourly Time
Signal that causes the watch to beep twice every hour on
the hour.
• The alarm number (AL1 though AL3) indicates an alarm
screen. SIG appears in place of the alarm number when
the Hourly Time Signal screen is shown.
• All of the operations in this section are performed in the
Alarm Mode, which you enter by pressing C.
1.In the Alarm Mode, press D to select the alarm whose
time you want to set.
AL1 AL2 AL3 SIG
2.Hold down A until the hour setting of the alarm time
starts to flash, which indicates the setting screen.
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• This automatically turns on the alarm.
).
— 3 —
3. Press C to 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. (A indicator) or p.m. (P indicator).
5. Press A to exit the setting screen.
Alarm Operation
The alarm sounds in all modes at the preset time for about 10 seconds, or until you
stop it by pressing any button.
To test the alarm
In the Alarm Mode, hold down D to sound the alarm.
To turn an alarm and the Hourly Time Signal on and off
1. In the Alarm Mode, press D to select an alarm or the Hourly Time Signal.
2. When the alarm or the Hourly Time Signal you want to set is selected, press A to
turn it on and off.
Data Memory
Timekeeping
Mode time
Text
Record number
To create a new data memory record
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Cursor
Timekeeping
Mode time
Text Record number
To recall data memory records
1. In the Data Memory Mode, press D to scroll forward through data memory records.
• Each press of D advances to the next record and shows its record number and
first three characters of its text.
• Pressing D while the last record in memory is on the display changes to the
remaining memory screen. Pressing D again displays the first record.
2. Use A to scroll through the text, three characters at a time.
First three characters
• An end mark indicates the end of the text.
To edit a data memory record
1. In the Data Memory Mode, display the record you want to edit.
2. Hold down A until the flashing cursor appears on the display.
3. Press C to move the flashing to the character you want to change.
4. Use D and B to change the character.
5. After making the changes you want, press A to store them and return to the data
memory record screen.
To delete a data memory record
1. In the Data Memory Mode, display the record you want to delete.
2. Hold down A until the flashing cursor appears on the display.
3. Press B and D at the same time to delete the record.
• The message CLR appears to indicate that the record is being deleted. After the
record is deleted, the cursor appears on the display, ready for input.
4. Input data or press A to return to the remaining memory screen.
You can use the watch’s data memory to store e-mail
addresses, Web page URLs, and other text data.
• All of the operations in this section are performed in the
Data Memory Mode, which you enter by pressing C.
Data Memory Records
Each data memory record can contain up to 63
characters. Records are stored in memory in the
sequence they are created.
• The number of records you can store in data memory
depends on the number of characters that make up
each record. See “Data Memory Management” for more
information.
1.In the Data Memory Mode, press A and D at the
same time to display the remaining memory screen.
• You do not have to perform the above step if the
remaining memory screen is already on the display.
• If 0% is shown for remaining memory, it means that
memory is full. To store another record, you will first
have to delete some of the records stored in memory.
2.Hold down A until the flashing cursor appears on the
display, which indicates the setting screen.
3.Use B and D to cycle through characters at the
current cursor location, and C to move the cursor to
the right. See “Inputting Text” for more information.
• If memory becomes full while you are inputting text,
the cursor will jump to the first (leftmost) character of
the text when you press C, instead of advancing to
the right.
4.Press A to store your data and return to the data
memory record screen (without the cursor).
• The message SET appears for about two seconds,
followed by a data memory record screen, which shows
the text you just input, along with a record number
automatically assigned by the watch.
Each press of A shows the next three characters.
▲
Second three characters End mark
▲
Stopwatch
The stopwatch lets you measure elapsed time, split times,
Timekeeping
Mode time
Minutes 1/100 second
Seconds
and two finishes.
• The display range of the stopwatch is 99 minutes, 59.99
seconds.
• The stopwatch continues to run, restarting from zero
after it reaches its limit, until you stop it.
• Exiting the Stopwatch Mode while a split time is frozen
on the display clears the split time and returns to
elapsed time measurement.
• The stopwatch measurement operation continues even if
you exit the Stopwatch Mode.
• All of the operations in this section are performed in the
Stopwatch Mode, which you enter by pressing C.
To measure times with the stopwatch
Elapsed Time
D
Start Stop
D
➤
D
➤
Re-start Clear
D
➤
Stop
A
➤
Split Time
D
Start Split
A
➤
(,flashes)
A
➤
Split release
D
➤
Stop
A
➤
Clear
Two Finishes
D
Start Split
A
➤
First runner
finishes.
Display time of
first runner.
D
➤
Stop
Second runner
finishes.
A
➤
Split release
Display time of
second runner.
A
➤
Clear
Illumination
The watch has an EL (electro-luminescent) panel that
causes the entire display to glow for easy reading in the
dark.
• See “Illumination Precautions” for other important
information.
To turn on illumination
Press B in any mode to illuminate the display.
• You can specify 1.5 seconds or 2.5 seconds as the
illumination duration. See “T o set the current time and
date manually” for more information.
Battery
This watch is equipped with a solar cell and a rechargeable battery (secondary
battery) that is charged by the electrical power produced by the solar cell. The
illustration shown below shows how you should position the watch for charging.
Example: Orient the watch so its face
is pointing at a light source.
• 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.
• Normally, you should try to keep the
watch outside of your sleeve as much
as possible. Charging is significantly
reduced if the face is only partially
covered.
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.
• Normally, the rechargeable battery should not need replacement, but after very long
use over a number of years, the rechargeable battery may lose its ability to achieve
a full charge. Should you notice problems with getting the rechargeable battery to a
full charge, contact your dealer or CASIO distributor about having it replaced.
• The rechargeable battery should be replaced with a CASIO-specified CTL1616
battery only. Other rechargeable batteries can cause damage to the watch.
• All data stored in memory is deleted, and the current time and all other settings
return to their initial factory defaults whenever battery power drops to Level 4 and
when you have the battery replaced.
• Turn on the watch’s Power Saving function and keep it in an area normally exposed
to bright light when storing it for long periods. This helps to keep the rechargeable
battery from going dead.
Battery Power Indicator and Recover Indicator
The battery power indicator on the display shows you the current status of the
rechargeable battery’s power.
Level
Battery Power
Indicator
1
2
3
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Battery indicator
Recover indicator
|
(Charge Soon Alert)
4
Solar cell
Function Status
All functions enabled.
All functions enabled.
Auto and manual receive,
alarm, hourly time signal,
illumination, and display are
disabled.
All functions, including
timekeeping, disabled.
— 4 —
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