Casio QW-2489 Service Manual & Parts List

SERVICE MANUAL

& PARTS LIST

REF. NO. S/M-760

DEC. 2001

MODULE NO.

QW-2489

BGM-221

(WITHOUT PRICE)

CONTENTS

Page

1. SPECIFICATIONS: QW-2489..................................................................... 1

2. OPERATION CHART: QW-2489................................................................ 2

3. DRAWINGS: QW-2489

3-1. LCD DIAGRAM ............................................................................................. 4

3-2. CIRCUIT DIAGRAM ......................................................................................5

3-3. CHECKING TERMINALS AND COMPONENT............................................. 6

4. EXPLODED VIEW: QW-2489..................................................................... 7

5. PARTS LIST: QW-2489.............................................................................. 8

6. PRECAUTIONS FOR REPAIR: QW-2489

6-1. AC (ALL CLEAR) AND REMOVING OF MODULE ...................................... 9

6-2. ACCURACY CHECKING .............................................................................. 9

1. SPECIFICATIONS: QW-2489

Item Detail

Battery CR1620 Battery life Approx. 1.5 years Current consumption 3.94 µA maximum Alarm system Piezo plate on Back cover Accuracy ±15 sec./month Accuracy setting system Trimmer capacitor Accuracy checking See page 9 Functions • Shock resistant

• Electro-luminescent backlight Afterglow

• Day Counter Automatically counts down the days from the current date to a target

date. Memory capacity: 5 records (12 character of text) A mark appears on the display to let you know when a target date is

reached.

• Free memos 5 independent free memos (up to 8 characters and 16 numerals)

• Katakana display

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

• Musical alarms 5 independent daily alarms 5 melodies (each presettable with a unique 2-part harmony) and beep

• Hourly time signal

• Auto-calender (to year 2039)

• 12/24-hour formats

• Regular timekeeping: Hr, min, sec, am/pm, month, date, day, daylight saving on/off

— 1 —

2. OPERATION CHART: QW-2489

General Guide

• Press

C to change from mode to mode.

• Pressing

E in any mode besides the Alarm Mode illuminates to the display for

about three seconds. The backlight is disabled while a setting screen is on the display.

Timekeeping Mode Day Counter Mode

Press

• If you do not perform any operation for a few minutes while a setting screen (with flashing digits) is on the display , the w atch automatically e xits the setting screen.

• If you do not perform any operation for a few minutes in any mode besides stopwatch mode, the watch automatically reverts to the normal timekeeping screen.

Alarm Mode Stopwatch Mode

Memo Mode

Timekeeping Mode

Press

D to toggle between 12-hour and 24-hour

Month

Day of week

Hour

PM indicator

Timekeeping Mode Settings

In addition to settings for the current time and date, the Timekeeping Mode setting screen also lets you turn button tones and melody play on and off, adjust tones and melody volume, and adjust display contrast.

To make Timekeeping Mode settings

1.While in the Timekeeping Mode, hold down on the display, indicating the setting screen.

2.Press

C to move the flashing in the sequence shown below . Press

the flashing in the opposite direction.

Press . Press .

Seconds DST Hour Minutes Year

Contrast (CNT)

DST indicator 1

* Daylight Saving Time (DST), which is also sometimes called “summer time”

advances the time for one hour, as is the custom in some areas during the summer. Remember that not all countries or even local areas use Daylight Saving Time.

• While the SOUND (button tones) setting is selected, press

beep and musical tone on and off, as shown below.

• Changing the SOUND also changes the Hourly Time Signal tones.

Day

Seconds

Minutes

DST indicator 2

Press . Press .

Beep

• While the VOL setting is selected, press

• With some models, changing the volume setting affects volume very little.

• While the CNT setting is selected, press

make it lighter.

• While any other setting is selected (flashing), press

decrease it. Holding down either button changes the setting at high speed.

4.After you make the settings you want, press

• The day of the week is automatically set in accordance with the date.

• The date can be set within the range of J an uary 1, 2000 to December 31, 2039.

• The watch's built-in full automatic calendar automatically makes allowances

for different month lengths and leap years. Once you set the date, there should be no reason to change it except after the replacement of the watch's battery.

Loud

timekeeping.

• With 12-hour timekeeping, times between midnight and noon are indicated by A (am), while times between noon and midnight are indicated by P (pm).

• The A and P indicators do not appear for 24-hour timekeeping.

• Pressing

B plays a randomly selected melody . T o

stop a playing melody , press any b utton besides

• Pressing

E while a melody is playing toggles the

display between an animated character and the name of the melody.

• Press

E to illuminate the display for about three

seconds. When 12-hour timekeeping is being used,

pressing

E also displays an animated character.

A until the second’s digits flash

Volume (VOL)

3.While the second’s setting is selected (flashing),

• If you press the range of 30 to 59, the seconds are reset to 00 and 1 is added to the minutes. If the second’s setting is in the range of 00 to 29, the minute’s count is unchanged.

• While the DST (Daylight Saving Time) setting is selected, press

• DST indicator 1 is displayed in the Timekeeping Mode setting screen only when the DST setting is selected. It shows ON when the DST setting is on, and OFF when the DST setting is off.

• DST indicator 2 is displayed in the Timekeeping Mode, Day Counter Mode and Alarm Mode when the DST setting is turned on.

press

D or

Musical tone

Press or .

Sound (SOUND)

B to reset it to 00.

D or

B while the second’s setting is in

D or

B to toggle it on and off.

D or

B to toggle it between loud and soft.

D to make the display darker , or

D to increase it or

A to exit the setting screen.

Soft

D or

Off

B to turn the

E to move

MonthDay

B to

About the Backlight

Pressing

E in any mode besides the Alarm Mode illuminates the display for

about three seconds. The backlight is disabled while a setting screen is on the display.

• The backlight of this watch employs an electro-luminescent (EL) light, which loses its illumination power after very long term use.

• Frequent use of the backlight shortens battery life.

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

under direct sunlight.

• The backlight automatically turns off an alarm sounds.

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

does not indicate malfunction.

Day Counter Mode

Mode indicator

Text

Year Month

Day counter record number

The Day Counter Mode lets you count the number of days from the Timekeeping Mode’s current date to a specific target date.

• There are five Day Counter records, each of which can be assigned up to 12 characters of text and a target date.

• When a target date is reached, the DAYS indicator flashes on the display in the Timekeeping Mode. The DA YS indicator also flashes in the Day Counter Mode when the screen for the target date is on the display.

• The DAYS indicator flashes on the target date each year, regardless of the year setting of the target date.

• The initial default date for a Day Counter record is 2001/1/1, and the text area contains All spaces. (All spaces for the text display a series of hyphens “ – – – – – ”.)

Recalling Day Counter Data

In the Day Counter Mode, press screens.

• The day count is a negative value whenever the target date comes before the current date.

To set the target date

1.In the Day Counter Mode, press

set.

2.Hold down

display. This indicates the input screen.

3.Press

the flashing in the opposite direction.

4.While the flashing is located within the text area, use

characters at the current location of the flashing. Holding down either button scrolls through characters at high speed.

Number of days

D to scroll through the Day Counter record

D to display a record number you want to

A until the first (leftmost) text character starts to flash on the

C to move the flashing in the sequence shown below . Press

Press . Press .

Character 1

Day

Press . Press .

Space A to Z Punctuation

Hyphen Symbols

Month

Numbers

Day

DAYS indicator

Character 12

Year

D or

See the “CHARACTER LIST” at the back of this manual for details.

5.While any other setting is selected, press

Holding down either button changes the setting at high speed.

• Pressing area clears any input text and resets the date setting to the current date. At this time the message “CLEAR” appears on the display.

• Pressing date area resets the date setting to the current date without affecting the text.

6.After you make the settings you want, press

• The date can be set within the range of January 1, 1940 to December 31,

2039.

D and

B at the same time while the flashing is located within the text

D and

B at the same time while the flashing is located within the

D to increase it or

A to exit the input screen.

— 2 —

Target Date

E to move

B to scroll through

Japanese characters

B to decrease it.

+ 8 hidden pages

Casio QW-2489 Service Manual & Parts List

Specifications and Main Features

Frequently Asked Questions

User Manual