Casio QW-2511, QW-2708, QW-2709 Service Manual & Parts List

SERVICE MANUAL

& PARTS LIST

REF. NO. S/M-777

JUL. 2002

MODULE NO.

QW-2511 QW-2708 QW-2709

WV-54DJ

(QW-2511)

WVX-100DA

(QW-2708)

WVX-100DJ

(QW-2709)

(WITHOUT PRICE)

CONTENTS

Page

1. SPECIFICATIONS

1-1. QW-2511............................................................................................. 1

1-2. QW-2708............................................................................................. 2

1-3. QW-2709............................................................................................. 3

2. OPERATION CHART: QW-2708................................................................ 4

3. DRAWINGS 3-1. LCD DIAGRAMS

QW-2511............................................................................................. 9

QW-2708/2709................................................................................... 10

3-2. CIRCUIT DIAGRAM

QW-2511............................................................................................ 11

QW-2708/2709................................................................................... 12

3-3. CHECKING TERMINALS AND COMPONENTS

QW-2511............................................................................................ 13

QW-2708/2709................................................................................... 14

4. EXPLODED VIEW: QW-2511.................................................................... 15

5. PARTS LIST: QW-2511............................................................................. 16

6. EXPLODED VIEW: QW-2708/2709........................................................... 17

7. PARTS LIST: QW-2708/2709.................................................................... 18

8. PRECAUTIONS FOR REPAIR: QW-2511/2708/2709

8-1. AC (ALL CLEAR) AND REMOVING OF MODULE .......................... 19

8-2. ACCURACY CHECKING .................................................................. 19

9. TROUBLESHOOTING: QW-2511/2708/2709 ........................................... 20

1. SPECIFICATIONS 1-1. QW-2511

Item Detail

Battery CR2016 Battery life Approx. 2 years Current consumption 1.98 µA maximum Alarm system Piezo plate on Back cover Accuracy ±15 sec./month Accuracy setting system Trimmer capacitor Accuracy checking See page 19 Functions • Electro-luminescent backlight

Afterglow

• Time calibration signal reception Auto receive (2:00AM, 4:00AM, and 6:00AM) Manual receive Last date/time received display

• Time Calibration Signal Call sign: JJY (Fukushima/Fukuoka, Japan) Frequency: 40/60 kHz Range: Approximately 1,000 km

• e-DATA MEMORY Memory capacity: Maximum Number of Records: 40 (7 characters per record) Minimum Number of Records: 5 (63 characters per record) Input: Variable length Others: Remaining memory indicator

• World time 29 time zones (30 cities), daylight saving time on/off

• 1/100-sec. stopwatch Measuring capacity: 23:59'59.99" Measuring modes: Elapsed time, split time, 1st-2nd place times

• Daily alarm 5 independent daily alarms Silent alert Rminder message display Snooze feature for one alarm only (10-sec. alarm; up to 7 repeats at intervals of approximately 5 min.)

• Hourly time signal

• Auto-calendar (to year 2039)

• 12/24-hour format

• Regular timekeeping: Hr, min, sec, pm, month, date, day

— 1 —

1-2. QW-2708

Item Detail

Afterglow

• Time calibration signal reception Auto receive (2:00AM, 4:00AM, and 6:00AM) Manual receive Last date/time received display

• Time Calibration Signal Call sign: WWVB (Fort Collins, Colorado) Frequency: 60 kHz Range: Approximately 3,000 km

• World time 29 time zones (30 cities), daylight saving time on/off

• 1/100-sec. stopwatch Measuring capacity: 23:59'59.99" Measuring modes: Elapsed time, split time, 1st-2nd place times

• Daily alarm 5 independent daily alarms Silent alert Rminder message display Snooze feature for one alarm only (10-sec. alarm; up to 7 repeats at intervals of approximately 5 min.)

• Hourly time signal

• Auto-calendar (to year 2039)

• 12/24-hour format

• Regular timekeeping: Analog: Two hands (Hr, min) Digital: Hr, min, sec, pm, month, date, day

— 2 —

1-3. QW-2709

Item Detail

Afterglow

• Time calibration signal reception Auto receive (2:00AM, 4:00AM, and 6:00AM) Manual receive Last date/time received display

• Time Calibration Signal Call sign: JJY (Fukushima/Fukuoka, Japan) Frequency: 40/60 kHz Range: Approximately 1,000 km

• World time 29 time zones (30 cities), daylight saving time on/off

• 1/100-sec. stopwatch Measuring capacity: 23:59'59.99" Measuring modes: Elapsed time, split time, 1st-2nd place times

• Daily alarm 5 independent daily alarms Silent alert Rminder message display Snooze feature for one alarm only (10-sec. alarm; up to 7 repeats at intervals of approximately 5 min.)

• Hourly time signal

• Auto-calendar (to year 2039)

• 12/24-hour format

• Regular timekeeping: Analog: Two hands (Hr, min) Digital: Hr, min, sec, pm, month, date, day

— 3 —

2. OPERATION CHART: QW-2708

General Guide

• Press C to change from mode to mode.

• In any mode, press L to illuminate the display.

Timekeeping Mode

Press C.

World Time Mode

▲

Alarm Mode

Hand Setting Mode

Data Memory

▲

Mode

▲

Stopwatch Mode

▲

Timekeeping

Use the Timekeeping Mode to set and view the current time and date.

• In the Timekeeping Mode, press D to change the screen format as shown below.

Date and Time

Month – Day

Day of week

Press D.

Analog

▲

Seconds

▲

Seconds and Date

PM indicator

• Pressing A displays the Last Signal screen (date and time the time calibration signal was last received) in the Timekeeping Mode.

Seconds

Hour : Minutes

▲

Press A.

▲

Date

Receive date Receive time

Last Signal Screen

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.

• Before using the watch in the Continental United States, first use the procedure under States” to set the time in accordance with a time calibration signal.

• Note that after you set your Home City (the city where you normally use the watch) code, you must also turn on the watchís time calibration signal receiver if you want to enable auto time calibration. See “About Auto Receive for more information.

• See “Setting the Digital Time and Date Manually” for information about manual settings.

• The analog time of this watch is synchronized with the digital time. Because of this, the analog time setting is automatically adjusted whenever you change the digital setting. See “Analog Timekeeping” for more information.

• Before using the watch in Japan, first specify your Home City, select the DST setting you want to use, and then perform the procedure under “To perform manual time calibration signal reception” .

Setting Up the Watch for Use in the Continental United States

You need to make the following three settings before using this watch in the Continental United States. The following provides a general overview of the setting procedure. For full details, see and “Time Calibration Signal Reception”.

• Specify the city code for your Home City (the city where you will normally use the watch).

• Select the auto summer time (DST) setting.

• Perform the manual time calibration signal receive operation to set the

current time.

To set up the watch for use in the Continental United States

GMT differential

City code

Receive indicator

“

Setting Up the Watch for Use in the Continental United

“

Setting the Time and Date Manually

1. In the Timekeeping Mode, press B. This causes the current auto receive on/off setting (the receive indicator) to flash, which indicates the setting screen.

2. Press C twice to move the flashing to the city code setting.

3. Use D(+) and A(–) to select the city code you want to use as your Home City.

The following

•

in the Continental United States time zones. LAX: Los Angeles, San Francisco, Las Vegas, Seattle

DEN: Denver, El Paso CHI: Chicago, Houston, Dallas/Fort Worth, New

Orleans NYC: New York, Detroit, Miami, Boston

4. Press C to display the summer time (DST) setting screen.

5. Use D to select A UTO DST.

• AUTO DST specifies auto switching between

Daylight Saving Time and Standard Time.

6. Press B to exit the setting screen.

• If you changed the digital time setting with the

above steps, the analog hands move at this time

to match it. Wait until the analog hands stop

moving before you advance to the next step.

7. Hold down A for about two seconds until the

receive indicator starts to flash on the display.

are the city codes for major cities

”

▲

• This indicates that signal reception has started.

• Time calibration signal reception takes from two to six minutes. Take care that

you do not move the watch during this time.

• If the watch is indoors, we recommend that you place the watch near a window to allow better signal reception.

• After signal reception is complete, the display of the watch changes to the Last Signal screen, and the analog time of the watch is adjusted automatically .

Time Calibration Signal Reception

This watch is designed to pick up a time calibration signal and update its time setting in accordance with the signal. There are two different methods you can use to receive the signal: Auto Receive and Manual Receive. With Auto Receive, the watch automatically receives the calibration signal three times each day and makes appropriate adjustments. With Manual Receive, you perform a specific button operation to receive the calibration signal. Before performing a signal receive operation, remove the watch from you wrist and position it as shown in the illustrations below.

• If your watch has a resin band, pass the end of the band through the band loop and place the watch on a stable surface.

Resin band Metal band

Pass through band loop.

Note

• If you are using the time calibration signal to set the time for this watch, be sure to correctly set your Home City. Otherwise, there is the chance that the watch will not set the correct time.

• Note that signal reception is possible only when the watch is within range of a time calibration signal transmitter, and a city code that supports signal reception is selected as the Home City code.

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

”

• Auto receive is turned on when the watch is shipped from the factory.

• Time calibration signal reception is disabled while the analog hands are

moving after you change the digital time setting.

• See the information under experience problems with time calibration signal reception.

To perform manual time calibration signal reception

1.Place the watch on a stable surface so its top (12 o'clock side) is facing in

the general direction of the signal transmitter.

• Note that signal reception is poor if the watch is on its back or side.

Receive indicator

Note

• To interrupt a receive operation and return to the Timekeeping Mode, press A.

• If the receive operation is unsuccessful, the message ERROR! appears on

the display for about one or two minutes. After that, the watch returns to the Timekeeping Mode.

• You can also change from the Last Signal or ERROR! screen to the normal timekeeping screen by pressing A.

About the Receive Indicator

The receive 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.

Weak

• Even in an area where signal strength is strong, it takes about 10 seconds for signal reception to stabilize enough for the receive indicator to indicate signal strength.

• Use the receive indicator as a guide for checking signal strength and for finding the best location for the watch during signal receive operations.

• The receive indicator remains on the display in all modes following reception of the time calibration signal and calibration of the watch’s time setting. The receive indicator does not appear if signal reception was unsuccessful or after manual adjustment of the current time setting.

“

Time Calibration Signal Reception” if you

2.In the Timekeeping Mode, hold down A for about two seconds until the receive indicator starts to flash on the display.

• This indicates that signal reception has started.

• Time calibration signal reception takes from two to

six minutes. Take care that you do not move the

watch during this time.

• After signal reception is complete, the display of the

watch changes to the Last Signal screen, and the analog time of the watch is adjusted automatically.

• The receive indicator indicates that the calibration

time reception attempt was successful.

Strong

— 4 —

About Auto Receive

When auto receive is turned on, the watch automatically starts to receive the time calibration signal when the digital time in the Timekeeping Mode reaches 2:00 AM, 4:00 AM and 6:00 AM each day (calibration times).

Note

• The auto receive operation is performed only if the watch is in the Timekeeping or World Time Mode when one of the calibration times is reached. It is not performed if a calibration time is reached while you are making settings (while settings are flashing on the display), while an alarm is sounding, or while a silent alert operation is being performed.

• Auto receipt of the calibration signal is designed to be performed early in the morning, while you sleep (provided that the digital 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.

• The receive indicator indicates that either the 2:00 AM, 4:00 AM, or 6:00 AM calibration signal reception was successful. Note, however, that the receive indicator is cleared from the display at 3:00 AM each day.

• If you do not see the receive indicator except for the above reason, it means there was some problem with the calibration reception operation. Either perform reception manually, or make sure the watch is set up properly to receive the time calibration signal for the next automatic reception time.

• When auto receive is turned on, the watch receives the calibration signal for two to six minutes each day when the digital time reaches 2:00 AM, 4:00 AM and 6:00 AM. Do not operate any of the watch’s buttons within six minutes prior to or following the calibration times. Doing so can interfere with correct calibration.

• Remember that reception of the calibration signal depends on the time shown on the digital display. The receive operation will be performed whenever the digital display shows 2:00 AM, 4:00 AM and 6:00 AM, regardless of whether or not the displayed time is actually the correct time.

• When two or three 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.

To turn auto receive on and off

Setting the Digital Time and Date Manually

Make sure you select your Home City code (the city code whose time and date you are setting) before 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 digital time and date manually

Auto

Receive

Day

3.When the setting you want to change is flashing, use A and/or D to

change it as described below.

Auto Receive

Frequency

City code

DST

12/24-Hour format

Hour, Minutes

Seconds Month, Day, Year

4.Press B to exit the setting screen.

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

“

About Auto Receive” for details.

• See “City Code Table” at the back of this manual for a complete list of available city codes.

• 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 without changing the minutes.

1.In the Timekeeping Mode, press B. This causes the current auto receive on/off setting (the receive

Month

indicator) to flash, which indicates the setting

screen.

2.Press D to toggle auto receive on (ON) and off

(OFF).

3.Press B to exit the setting screen.

1.In the Timekeeping Mode, press B. This causes the current auto receive on/off setting (the receive

indicator) to flash, which indicates the setting

screen.

2.Press C to move the flashing in the sequence shown below to select other settings.

Frequency

ScreenSetting

City Code

Year Minutes

Button Operations

Press D to toggle auto receive on and off.

When TYO (Tokyo) is selected as the city code, press D to toggle the calibration signal reception frequency among Auto (FREQ. A T), 40KHz (FREQ. 40) and 60KHz (FREQ. 60). Note that frequency selection is available for the TYO city code only.

Use D (+) and A (–) to change the setting.

Press D to toggle between Daylight Saving

Time (ON) and standard time (OFF).

• Pressing D performs a different operation when HKG, TYO, SEL, NYC, CHI, DEN, LAX, ANC or HNL is selected as Home City Code. See "Auto Summer Time (DST) Switching".

Press D to toggle between 12-hour (12H)

and 24-hour (24H) timekeeping. Use D (+) and A (–) to change the

setting. Press D to reset the seconds to 00. Use D (+) and A (–) to change the setting.

DST

Hour

12/24-Hour Format

Seconds

Analog Timekeeping

The analog time of this watch is synchronized with the digital time. The analog time setting is adjusted automatically whenever you change the digital time.

Note

• The hands for the analog timepiece move to adjust to a new setting whenever any of the following occurs. When you change the digital time setting manually When the digital time setting is changed by time calibration signal reception When you change the Home City code and/or DST setting

• If the analog time does not match the digital time for any reason, use the procedure described under setting to the digital setting.

• Whenever you need to adjust both the digital and the analog time settings manually, make sure you adjust the digital setting first.

• Depending on how much the hands have to move in order to adjust to the digital time, it may take some time before the analog hands stop moving.

To adjust the analog time

Current time

When you want to do this:

Move the hand setting forward 20 seconds Move the hand setting back 20 seconds Move the hand setting a short way forward at high speed

Move the hand setting a short way back at high speed

Move the hand setting a long way forward at high speed

Move the hand setting a long way back at high speed

4.Press B to exit the setting screen.

• The minute hand will be adjusted slightly to match the seconds when you exit the setting screen.

• To return to the Timekeeping Mode, press C.

“

To adjust the analog time” to match the analog

1.In the Timekeeping Mode, press C five times to enter the Hand Setting Mode.

2.Press B and the current digital time starts to flash, which indicates the setting screen.

3. Use D (+) and A (–) to adjust the analog setting as described below.

Perform this button operation:

• Press D.

• Press A.

• Hold down D.

• Release D when the hands reach the

setting you want.

• Hold down A.

• Release A when the hands reach the

setting you want.

• While holding down D to move the hands at high-speed, press A to lock the highspeed hand movement.

• Press any button when the hands are close to the setting you want.

• Hand movement stops automatically if the hour hand makes one full (12-hour) revolution.

• While holding down A to move the hands at high-speed, press D to lock the highspeed hand movement.

• Press any button when the hands are close to the setting you want.

• Hand movement stops automatically if the hour hand makes one full (12-hour) revolution.

World Time

GMT

City code

differential

Current time in the selected city code

To view the time in another city code

While in the World Time Mode, press D to scroll through the city codes (time zones) to the east or A to scroll to the west.

• If the current time shown for a city is wrong, check your Timekeeping Mode time and Home City settings and make the necessary changes.

To toggle a city code time between standard time and Daylight Saving Time

• Note that the DST/Standard Time setting affects only the currently displayed city code. Other city codes are not affected.

• Daylight Saving Time (DST) advances the time setting by one hour from Standard Time. Remember that the not all countries or even local areas use Daylight Saving Time .

• Note that you cannot use the World Time Mode to change the DST ON/OFF setting of the Home City code you currently have selected in the Timekeeping Mode. See information about turning the Home City code DST setting on and off.

• The watch will perform a signal receive operation 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 code time.

World Time shows the current time in 30 cities (29 time zones) around the world.

• For full information on city codes, see the Code T able” at the back of this manual.

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

• 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 A and D to display the city code (time zone) whose standard time/ Daylight Saving Time setting you want to change.

2.Press B to toggle Daylight Saving Time (DST displayed) and standard time (DST not displayed).

• The DST indicator is on the display whenever you

display a city code for which Daylight Saving Time is turned on.

“

City

— 5 —

+ 16 hidden pages

Casio QW-2511, QW-2708, QW-2709 Service Manual & Parts List

Specifications and Main Features

Frequently Asked Questions

User Manual