Casio QW-2812 Service Manual & Parts Manual

Download

Page 1

SERVICE MANUAL

& PARTS LIST

REF. NO. S/M-848

FEB. 2004

MODULE NO.

QW-2812

WVH-500D

Ver.1 : Apr. 2004

(WITHOUT PRICE)

Page 2

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

Page 3

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 —

Page 4

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

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

Page 5

• 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.

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

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

Mainflingen

Strong

(Level 4)

appears on the display for about

screen to the normal timekeeping

To turn auto receive on and off

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

does not support auto receive, “xx” appears in place

of the on/off indicator. This means you cannot turn

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.

) 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

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.

• This automatically turns on the alarm.

— 3 —

Page 6

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

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

Start Stop

➤

Re-start Clear

➤

Stop

➤

Split Time

Start Split

➤

(,flashes)

➤

Split release

➤

Stop

➤

Clear

Two Finishes

Start Split

➤

First runner finishes. Display time of first runner.

➤

Stop

Second runner finishes.

➤

Split release

Display time of second runner.

➤

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

Battery indicator

Recover indicator

(Charge Soon Alert)

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 —

Page 7

• The flashing charge indicator (CHG) 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.

• 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 time and date, after the battery reaches Level 2 after dropping to Level 4.

• Leaving the watch in direct sunlight or some other very strong light source can cause the battery power indicator to temporarily show a reading that is higher than the actual battery level. The correct battery power indicator should appear after a few minutes.

• If you use the light or alarms a number of times during a short period, the RECOVER indicator appears on the display and the following operations become disabled until battery power recovers.

Illumination Beeper tone Time calibration signal reception

After some time, battery power will recover and the RECOVER indicator will disappear, indicating that the above functions are enabled again.

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 7 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)

• Since these are the specs, we can include all the technical details.

• Display on 18 hours per day, sleep state 6 hours per day

• 1 illumination operation (1.5 seconds) per day

• 10 seconds of alarm operation per day

• 5 times calibration reception per day

• Stable operation is promoted by frequent charging.

Recovery Times

The table below shows the amount exposure that is required to take the battery from one level to the next.

Exposure Level (Brightness)

Approximate Exposure Time

Level 4 Level 3 Level 2 Level 1

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)

• The above exposure time values are all for reference only. Actual required exposure times depend on lighting conditions.

Approximate Exposure Time

5 minutes 24 minutes 48 minutes

8 hours

▲

1 hour

5 hours

10 hours

94 hours

▲

12 hours

60 hours

▲

6 hours

28 hours

– – –

Timekeeping

Use the Timekeeping Mode to set and view the current time and date. This section also explains how to manually set the current date and time.

• When setting the time, you can also configure settings for the illumination duration, the 12/24-hour format, and power saving on/off.

• All of the operations in this section are performed in the Timekeeping Mode, which you can enter by pressing C.

DST indicator Hour : Minutes

PM indicator

Day of week Month – Day

Setting the Time and Date Manually

Make sure you select your Home City code before you change the current time and date settings. World Time Mode times are all displayed in accordance with the Timekeeping Mode settings. Because of this, World Time Mode times will not be correct if you do not select the proper Home City code before setting the time and date in the Timekeeping Mode.

To set the current time and date manually

City code

Seconds

Press D.

▲

1.In the Timekeeping Mode, hold down A until the city code starts to flash, which indicates the setting screen.

2.Use A or C to move the flashing in the sequence shown below to select other settings.

Received time (Hour : Minutes)

Last Signal Screen

Received date (Month – Day)

▲

— 5 —

Press

/ Press A.

DSTCity Code

Seconds

Day

OFF

Month Y

Do this:

Use D (east) and B (west). Press D.

Press D.

Auto

Receiv

Hour Min

utes

ear

Transmitter/ City Settings

Time/Date Settings

3. When the setting you want to change is flashing, use B and/or D to change it as described below.

Transmitter/City Settings

Screen: To do this:

12/24-Hour

Forma

Power Saving

Change the city code Toggle between Daylight Saving

Time (

) , Standard Time (

or Auto DST (A) Toggle between auto receive on

) and off (

OFF

(

)

• See “City Code Table” for a complete list of available city codes.

Time/Date Settings

Screen: To do this:

Toggle between 12-hour ( 24-hour (

24H

Reset the seconds to 00 Toggle the illumination duration

setting between 1.5 seconds ( and 2.5 seconds (

Change the hour or minutes

) timekeeping

)

12H

Change the month, day or year Toggle Power Saving on (

off (

OFF

• For information about settings other than the time and date, see the following.

Illumination duration: Illumination Power Saving: Power Saving Function

4. Use A to exit the setting screen.

• If a Transmitter/City Setting screen is displayed, press A twice.

• If a Time/Date Setting screen is displayed, press A once.

Note

• Auto DST (

• The auto receive setting is used for time calibration signal reception only. See “About

Daylight Saving Time (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 Saving Time. The time calibration signal transmitted from Mainflingen includes both Standard Time and DST data. When the Auto DST setting is turned on, the watch switches between Standard Time and DST (summer time) automatically in accordance with the Mainflingen signal.

• The default DST setting is Auto DST (

• If you experience problems receiving the time calibration signal in your area, it is

To change the Daylight Saving Time (summer time) setting

1. In the Timekeeping Mode, hold down A until the city code starts to flash, which

2. Press C once to display the DST setting screen.

3. Use D to cycle through the DST settings in the sequence shown below.

4. When the setting you want is selected, press A twice to exit the setting screen.

• The DST indicator appears on the display to indicate that Daylight Saving Time is

as the Home City code. For more information, see “Daylight Saving Time (DST)” below.

Auto Receive” for details.

ATH

as your Home City code.

probably best to switch between Standard Time and Daylight Saving Time (summer time) manually.

indicates the setting screen.

Auto DST (A) DST on (ON)DST off (

turned on.

)

) can be selected only while

) whenever you select

OFF

Do this:

) and

Press D. Press D.

Press B.

)

Use D (+) and B (–). Use D (+) and B (–).

) and

Press D.

BER, PAR, LON

)

, or

ATH

is selected

BER, PAR, LON

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 Function

When turned on, the Power Saving function 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 the Power Saving function.

Elapsed Time

in Dark

60 to 70 minutes

6 or 7 days

• Wearing the watch inside the sleeve of clothing can cause it to enter the sleep state.

• The watch will not enter the sleep state while the Timekeeping Mode time is

between 6:00 AM and 9:59 PM. If the watch is already in the sleep state when the time reaches 6:00 AM, however, it will remain in the sleep state.

• The watch will not enter the sleep state while it is in the Stopwatch Mode.

Display

Blank, with PS flashing

Blank, with PS not flashing

Display is off, but all functions are enabled. All functions are disabled, but timekeeping

is maintained.

Operation

Page 8

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.

To turn Power Saving on and off

Power saving indicator

Auto Return Features

• If you leave the watch in the Alarm or Data Memory Mode for two or three minutes without performing any operation, it automatically returns to the Timekeeping Mode.

• If you leave the watch with a flashing setting or cursor on the display for two or three minutes without performing any operation, the watch automatically exits the setting screen.

Scrolling

The B and D buttons 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 the World Time, Alarm, or Data Memory Mode, the data you were viewing when you last exited the mode appears first.

Radio-controlled Timekeeping Precautions

• Strong electrostatic charge can result in the wrong time being set.

• Even when the watch is within the reception range of the transmitter, signal

reception will be impossible if the signal is blocked by mountains or other geological formations between the watch and signal source.

• Signal reception is affected by weather, atmospheric conditions, and seasonal changes.

• The time calibration signal bounces off the ionosphere. Because of this, such factors as changes in the reflectivity of the ionosphere, as well as movement of the ionosphere to higher altitudes due to seasonal atmospheric changes or the time of day may change the reception range of the signal and make reception temporarily impossible.

• Even if the time calibration signal is received properly, certain conditions can cause the time setting to be off by up to one second.

• The current time setting in accordance with the time calibration signal takes priority over any time settings you make manually.

• The watch is designed to automatically update the date and day of the week for the period January 1, 2000 to December 31, 2099. Setting of the date by the time calibration signal cannot be performed starting from January 1, 2100.

• This watch can receive signals that differentiate between leap years and non-leap years.

• Though this watch is designed to receive both time data (hour, minutes, seconds) and date data (year, month, day), certain signal conditions can limit reception to time data only.

• Normally, the signal reception date shown by the last signal screen is the date data included in the received time calibration signal. When only time data is received, however, the last signal screen shows the date as kept in the T imekeeping Mode at the time of signal reception.

• If you are in an area where proper time calibration signal reception is impossible, the watch keeps time within ±15 seconds a month at normal temperature.

• If you have problems with proper time calibration signal reception or if the time setting is wrong after signal reception, check your current city code, DST (summer time), and auto receive settings. The following are the initial factory defaults for these settings.

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

• The day of the week is automatically displayed in accordance with the date (year, month, and day) settings.

• The year can be set in the range of 2000 to 2099.

• 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 the Timekeeping Mode and World Time Mode is calculated in accordance with the Greenwich Mean Time (GMT) differential for each city, based on your Home City time setting.

• GMT differential is calculated by this watch based on Universal Time 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-hour Timekeeping 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 the A (AM) 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.

Inputting Text

The following describes how to input text in the Data Memory Mode.

On/Off status

Setting

City code DST (summer time)

Auto receive

without changing the minutes.

1.In the Timekeeping Mode, hold down A until the city code starts to flash, which indicates the setting screen.

2.Press A again.

3.Press C seven times until the Power Saving on/off

screen appears.

4.Press D to toggle Power Saving on (

5.Press A to exit the setting screen.

• The Power Saving indicator (PS) is on the display in all

modes while the Power Saving is turned on.

Initial Factory Default

(Berlin) (Auto switching)

(Auto receive)

) and off (

OFF

To input characters

Cursor

Data Memory

Input Screen

2. When the character you want is at the cursor position, press C to move the cursor to the right.

3. Repeat steps 1 and 2 to input the rest of the characters you want.

• See the “Character List” for information about the characters you can input.

Data Memory Management

Data memory can hold up to 315 characters total, while each record can contain up to 63 characters. This means that 40 records can be stored in data memory when each record contains seven characters of text or less.

Illumination Precautions

• The electro-luminescent panel that provides illumination loses power after very long

use.

• The illumination provided by the backlight may be hard to see when viewed under

direct sunlight.

• Illumination automatically turns off whenever an alarm sounds.

• The watch may emit an audible sound whenever the display is illuminated. This is

due to vibration of the EL panel used for illumination, and does not indicate malfunction.

• Frequent use of illumination runs down the battery.

1.When the cursor is on the display, use B and D to cycle through the available letters, numbers and symbols, in the sequence shown below.

Press D. Press B.

(space)

(number)

(lower-case)

(upper-case)

(symbol)

City Code Table

City

Code

– – –

Honolulu

HNL

Anchorage

ANC

Los Angeles

LAX

Denver

DEN

Chicago

CHI

New York

NYC CCS

Caracas

Rio De Janeiro

RIO

– – – – – –

GMT

LON

London

Paris

PAR

Berlin

BER

Athens

ATH

Cairo

CAI

Jerusalem

JRS

Jeddah

JED THR

Tehran Dubai

DXB

Kabul

KBL

Karachi

KHI

Delhi

DEL

Dhaka

DAC

Yangon

RGN

Bangkok

BKK

Hong Kong

HKG

Seoul

SEL

Tokyo

TYO

Adelaide

ADL

Sydney

SYD

Noumea

NOU

Wellington

WLG

• Based on data as of June 2003.

GMT

Differential

–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

+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

Other major cities in same time zone

Pago Pago Papeete Nome San Francisco, Las Vegas, Vancouver , Seattle/Tacoma, Dawson City El Paso, Edmonton Houston, Dallas/Ft. Worth, New Orleans, Mexico City, Winnipeg Montreal, Detroit, Miami, Boston, Panama City, Havana, Lima, Bogota La Paz, Santiago, Pt. Of Spain Sao Paulo, Buenos Aires, Brasilia, Montevideo

Praia Dublin, Lisbon, Casablanca, Dakar, Abidjan

Milan, Rome, Amsterdam, Algiers, Hamburg, Frankfurt, Vienna, Stockholm

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 Pt. Vila Christchurch, Nadi, Nauru Is.

Character List

(space)

a b c d e

f g h

–

+ A B

C D

E F

a b c

e f g h

+ A B C D E F

i j k l m n o p q

H I J

N O P

i j

n o p q

I J K L

M N O

–

: ,

' &

— 6 —

Page 9

3. DRAWINGS: MODULE QW-2812 3-1. LCD DIAGRAM

DST0

SIG

L30

L29

L28

CHG

L32

L31

RC0

L33

COL0

MID

RC2

RC1

X14

L38

L26

L27

L39

L37

L36

L35

L34

L21

L22

L23

L24

L25

HYP

COL1

REC

L10

L11

L12

L13

L14

L15

L16

L17

L18

L19

L20

DST1

L3L4L5L6L7L8L9

LC2

LC1

LC4

LC5

LC3

SEG.

L 3 L 4 L 5 L 6 L 7 L 8 L 9 L10 L11 L12 L13 L14 L15 L16 L17 L18 L19 L20 L21

COM.

LC1 LC2 LC3 LC4 LC5

P1 e3

RC2

d9 c9

c3 e2 d2

g3 b3

f2 g2 b2

a3 d8 c8 a2 d7 c7

HYP

c0 d0 e0

c1 d1 e1

DST1

REC

COL1

d4 b0 g0

f0 b1 g1

f1 HI

MID

e6 c4 e4 a0 d5 e5 a1

d6 RC1 RC0

e9 g9 b9 e8 g8 b8 e7 g7 b7

f4 b5 a5

f5 c6 g6 P0

COL0

f7 a7 AL

SIG

b4 g4 c5 g5

b6 a6 A0

DST0

— 7 —

SEG.

L22 L23 L24 L25 L26 L27 L31 L32 L33 L34 L35 L36 L37 L38 L39

L28 L29

COM.

LC1 LC2 LC3 LC4

X14Y1 X13Y1 X12Y1 X11Y1 X10Y1

X9Y1 X0Y1 X1Y1 X2Y1 X3Y1 X4Y1 X5Y1 X6Y1 X7Y1 X8Y1

COM.

X14Y0 X13Y0 X12Y0 X11Y0 X10Y0

X9Y0 X0Y0 X1Y0 X2Y0 X3Y0 X4Y0 X5Y0 X6Y0 X7Y0 X8Y0

L30

CHG

X14Y2 X13Y2 X12Y2 X11Y2 X10Y2

X9Y2 X0Y2 X1Y2 X2Y2 X3Y2 X4Y2 X5Y2 X6Y2 X7Y2 X8Y2

X14Y3 X13Y3 X12Y3 X11Y3 X10Y3

X9Y3 X0Y3 X1Y3 X2Y3 X3Y3 X4Y3 X5Y3 X6Y3 X7Y3 X8Y3

LC5

X14Y4 X13Y4 X12Y4 X11Y4 X10Y4

X9Y4 X0Y4 X1Y4 X2Y4 X3Y4 X4Y4 X5Y4 X6Y4 X7Y4 X8Y4

Page 10

✽ 1. No bonding

✽ 2. GND-Kl5: Open (No Soldering)

GND-Kl6: Open (No Soldering)

GND-Kl7: Open (No Soldering)

GND-Kl8: 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, 02) are used

in this module.

✽ 9.

Normal High

✽ 10.

LD2 (Normal Low) is used in this module.

✽ 11.

LD3 (Normal High) is used in this module.

✽ 12. Cc, Crl1, Crl2, Crl3, Rxt3 and Xtal3 are

not used in this module.

LSI

TOTAL 106PINS

BONDING 81PINS

GND VDD2

BAT

VCH VDD3 VC1 VC2

C2C5

XTB

Xtal

L3 - - - - - L38 LC1 - - - LC5

LCD ( 2.8V 1/3b 1/5d )

LD1

VDD1

LL1

Tr1

KI1

KI2

KI3

KI4

KI5

KI6

KI7

KI8

KI9

SCR

SCIN

RP1RP2

VDSP

VC3 VC4

Di1

VHF

KC4

KC3

KC2

KC1

VSC

VPM

Di2

GNDB

SDO SCK CSBSDI

Cxt

Rxt2

Ccp

Cbat

Rbat

Xtal2

ISB

ANT

Rcp

Rxt3

Xtal3

L39 - - - L55

L1 L2

FET-S

GND4 Asel

Pon P3-2

Hold P14

FET-D

GND3 GND2 P3-1

P4 P5

GND5

P12

P13

GND1

TCO

VCC

Crh1

Crh2

Crh3

Crl1

Crl2

Crl3

CLF1

Cel

INV

LL2

L+

VOUT

L-

GND

CLF2

V+

BACK

FRONT

✽1

✽10

✽1

✽11

✽1

✽11

✽2

✽3

✽9

✽3

✽5

✽4

✽5

✽3

✽6

✽1 ✽1✽1

✽1

✽7

✽8

✽1

✽8

✽1

✽12

3-2. CIRCUIT DIAGRAM

— 8 —

Page 11

3-3. CHECKING TERMINALS AND COMPONENTS

Resistor/Chip

Rxt2

Cbat

GND

KI1

Vcc

GND

VOUT

KI4

L+

GND

VDD2

Capacitor/Chip

Cxt

Oscillator/Crystal

Xtal2

ISB

FET-D

Vcc VDD2

Ccp

GND

L–

GND

L+

L–

VOUT

CLF2

CLF1

LL1

VDD2

GND

LD1

GND

SCR

SCIN

CLF2

GND

N2 N1

CLF1

GND

3. PCB ASS'Y (7640 7379)

Resistor/Chip

Rcp

Resistor/Chip

Rbat

Capacitor/Chip

Ccp

Capacitor/Chip

Resistor/Chip

Capacitor/Chip

Capacitor/Trimmer

VDD2

KI3

LL1

GND

LL1

GND

KI6

KI8

KI7

GND

GNDB

GND

VDD2

XTB

VDD2

GND

VCH

VC3

VC4

VC2

VC1

GND

VDSP

VHF

GND

KI2

GND

VDD3

GND

VDD1

GND

VSC

KI3

VCH

VC1

VDSP

KI2

VSC

KI9

KI3

FET-S

KI1

P14

VDD2

SD0

KC1

GND

KI4

VOUT

LD1

Coil

LL1

Transistor

Tr1

Diode

Di2

Resistor/Chip

RP2

Resistor/Chip

RP1

Capacitor/Chip

Cel

Coil

LL2

Inverter

INV

Top view of P.C.B. ass'y Bottom view of P.C.B. ass'y

Varistor

— 9 —

Resistor/Chip

Capacitor/Chip

Di1

4. Oscillator/Crystal

Xtal1

(7110 6336)

Diode

Page 12

4. EXPLODED VIEW: MODULE QW-2812

1 (1013 0239)

10 (1014 2487)

19 (1008 2129)

18 (1000 3815)

6 (1009 7687)

2 (1013 5055)

8 (1013 5052)

12 (7228 0364) 17 (1013 5134)

21 (1013 5136)

3 (7640 7379) PCB ass'y

9 (1013 5138) 13 (7207 8349)

20 (1013 5135)

14 (7207 8470) 7 (1008 2184)

16 (1013 5139)

5 (1006 5657)

Battery Storage (CTL1616)

15 (1013 4221)

14 (7207 8470)

11 (1014 0782) 14 (7207 8470)

— 10 —

Page 13

5. PARTS LIST: MODULE QW-2812

(+)

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 ---------------------------------------

3. Batteries in Bulk pack on the tray will be supplied from our Overseas Spare Parts Section under charge basi

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 Specification Applicable Q R

MODULE/WITHOUT MOVEMENT QW-2812YC-01 WVH-500D-7A < The module QW-2812 is "built-in t the case, therefore the module as the s

Less important

e" which is assembled directly to

are parts is not available. >

1 1013 0239 LCD S2815-01THP 2 1013 5055 EL YEL-2815-A-00 3 7640 7379 PCB ASS'Y RJQ517221*001V01TK 4 7110 6336 OSCILLATOR/CRYSTAL CFS-145LM07 5 1006 5657 BATTERY/STORAGE CTL1616 6 1009 7687 CUSHION 2549 Q470646-1 7 1008 2184 CUSHION 2709-2 Q469841-1 8 1013 5052 CUSHION 2815 RJQ515128-001V01

9 1013 5138 HOLDER RJQ514979-001V01 10 1014 2487 INTERCONNECTOR RJQ517008-001V01 11 1014 0782 LABEL RJQ517198-001V02 12 7228 0364 POLE Q421168A-1 13 7207 8349 SCREW 13 Q47608A-1 14 7207 8470 SCREW 465 Q48694B-1 15 1013 4221 SHEET/INSULATION 16 1013 5139 SHEET/INSULATION RJQ515079-001V01 17 1013 5134 SPACER RJQ514651-001V02 18 1000 3815 SPRING/COIL 1910-1 Q465481-1 19 1008 2129 SPRING/COIL 2512-2 Q469640-1 20 1013 5135 SUPPORTER/PCB ASS'Y RJQ514652-001V03 21 1013 5136 TERMINAL/BATTERY

For the

rices and minimum order/supply quantities of the above parts, refer to the Parts Price List P.P.L.-603.

RJQ515739-001V01 QW-2812YC-01

RJQ514658-001V02

QW-2812YC-01 QW-2812YC-01 QW-2812YC-01 QW-2812YC-01 QW-2812YC-01 QW-2812YC-01 QW-2812YC-01 QW-2812YC-01 QW-2812YC-01 QW-2812YC-01 QW-2812YC-01 QW-2812YC-01 QW-2812YC-01 QW-2812YC-01

QW-2812YC-01 QW-2812YC-01 QW-2812YC-01 QW-2812YC-01 QW-2812YC-01 QW-2812YC-01

1A 1A 1A 1B 1B 1C 1C 1C 1C 1C 1C 1C 1B 4C 1C 1C 1C 2B 2B 1C 1C

Notes: Q - Used quantity

R - Rank

— 11 —

Page 14

6. PRECAUTIONS FOR REPAIR: MODULE QW-2812 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.

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 A and C buttons 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-2812

— 12 —

Page 15

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 D button, press A and B buttons at 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 "88" is not appeared on the display, disassemble again the module and check the contact spring between the Solar cell and PCB.

Figure 1

3. To exit from TEST mode Press any button.

Press D, A and B buttons

Figure 2

Place the watch in a dark room more than two seconds.

Appear "88" on display.

Figure 3

— 13 —

Page 16

7. TROUBLESHOOTING: MODULE QW-2812

This is a flow chart about signal reception.

START

Check whether the Home City

code is selected correctly.

To perform MANUAL time

calibration signal reception

Signal

reception OK?

To perform AUTO time

calibration signal reception

Signal

reception OK?

Replace the PCB ass'y

Signal

reception OK?

Yes

Replace the Case center

ass'y with antenna

Yes

Signal

reception OK?

There is a possibility of location bad.

— 14 —

Page 17

Ver. 1 : Apr. 2004

Addition of pages 2, 3, 4, 5 and 6

CASIO TECHNO CO.,LTD.

Overseas Service Division

Shibuya-ku, Tokyo 151-8543, Japan

6-2, Hon-machi 1-Chome