Casio QW-2461 Service Manual & Parts List

Download

Page 1

SERVICE MANUAL

& PARTS LIST

REF. NO. S/M-757

NOV. 2001

MODULE NO.

QW-2461

BGM-220LV

(WITHOUT PRICE)

Page 2

CONTENTS

Page

1. SPECIFICATIONS: QW-2461..................................................................... 1

2. OPERATION CHART: QW-2461................................................................ 2

3. DRAWINGS: QW-2461

3-1. LCD DIAGRAM ............................................................................................. 5

3-2. CIRCUIT DIAGRAM ......................................................................................6

3-3. CHECKING TERMINALS AND COMPONENT............................................. 7

4. EXPLODED VIEW: QW-2461..................................................................... 8

5. PARTS LIST: QW-2461.............................................................................. 9

6. PRECAUTIONS FOR REPAIR: QW-2461

6-1. AC (ALL CLEAR) AND REMOVING OF MODULE ..................................... 10

6-2. ACCURACY CHECKING ............................................................................. 10

Page 3

1. SPECIFICATIONS: QW-2461

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 10 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-second stopwatch Measuring capacity: 23:59'59.99'' Measuring modes: Elapsed time, split time,1st-2nd place times

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

*Two special melodies are prepared for the dates December 25 and

January 1 (Japan Standard Time).

• 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 —

Page 4

2. OPERATION CHART: QW-2461

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 C.

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 A until the second’s digits flash on the display, indicating the setting screen.

2. Press C to move the flashing in the sequence shown below. Press E to move the flashing in the opposite direction.

Press . Press .

Seconds DST Hour Minutes Year

Contrast (CNT)

DST indicator 1

• While the SOUND (button tones) setting is selected, press D or B to turn

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

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

•

While the VOL setting is selected, press D or B to toggle it between loud and soft.

Day

Seconds

Minutes

DST indicator 2

Press . Press .

Beep

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 melody. To stop a playing

melody, press any button besides E.

• Special melodies play each year on January 1 and

December 25.

• 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.

Volume (VOL)

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

• If you press D or B while the seconds setting is in

the range of 30 to 59, the seconds are reset to 00 and 1 is added to the minutes. If the seconds setting is in the range of 00 to 29, the minutes count is unchanged.

• While the DST (Daylight Saving Time) setting is

selected, press D or B to toggle it on and off.

• 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.

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.

Sound (SOUND)

press D or B to reset it to 00.

Musical tone Off

Press or .

MonthDay

• If you do not perform any operation for a few minutes while a setting screen

(with flashing digits) is on the display, the watch automatically exits 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

4. After you make the settings you want, press A to exit the setting screen.

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

• The date can be set within the range of January 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.

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.

About the animated character

An animated character appears on the display of the watch any time you turn on the EL backlight after December 25 (2000 for Module 2255; 2001 for Module 2461). No animated character appears before then.

Day Counter Mode

Mode indicator

Text

Year

Month

Target Date

Day counter record number

Number of days

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 DAYS 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 D to scroll through the Day Counter record screens.

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

current date.

Day

DAYS indicator

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

• While the CNT setting is selected, press D to make the display darker, or B

to make it lighter.

• While any other setting is selected (flashing), press D to increase it or B to

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

Loud

Soft

— 2 —

Page 5

To set the target date

1. In the Day Counter Mode, press D to display a record number you want to set.

2. Hold down A until the first (leftmost) text character starts to flash on the display. This indicates the input screen.

3. Press C to move the flashing in the sequence shown below. Press E to move the flashing in the opposite direction.

Press . Press .

Character 1

Day

4. While the flashing is located within the text area, use D or B to scroll through characters at the current location of the flashing. Holding down either button scrolls through characters at high speed.

Press . Press .

Space A to Z Punctuation

Hyphen SymbolsNumbers

Character 12

YearMonth

Japanese characters

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

5. While any other setting is selected, press D to increase it or B to decrease it. Holding down either button changes the setting at high speed.

• Pressing D and B at the same time while the flashing is located within the

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

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

6. After you make the settings you want, press A to exit the input screen.

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

2039.

Alarm Mode

Mode indicator

Melody name

Current time

Alarm number

To set the alarm time for other days

1. While in the alarm Mode, press D to display the alarm number you want to set.

Alarm 1 Alarm 5Alarm 2 Alarm 3 Alarm 4

SIG: 00 (Hourly Time Signal)

2. Hold down A until the melody setting starts to flash on the display, indicating the setting screen. The alarm is automatically turned on at this time.

3. Press C to change the selection in the sequence shown below.

Melody Setting Hour Minutes

4. While melody setting is selected, press D or B to toggle it between BEEP and melody.

Press D or B.

• While any other setting is selected, press D to increase it or B to decrease

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

5. After you make the settings you want, press A to exit the setting screen.

• The format (12-hour and 24-hour) of the alarm time matches the format you

select for normal timekeeping.

• When setting the alarm time using the 12-hour format, take care to set the

time correctly as morning or afternoon.

To stop the alarm

• Press any button to stop the alarm after it starts to sound. Pressing E while

in the Timekeeping Mode displays the name of the melody, alternating with animated characters.

To turn a daily Alarm or the Hourly Time Signal on and off

1. Use D to display the alarm you want to turn on or off, or the screen for turning the Hourly Time Signal on or off.

2. Press B to toggle the displayed alarm or Hourly Time Signal on and off.

Alarm indicator 1

• Alarm indicator 1 is displayed in the alarm mode

only. It indicates the on/off status of the currently displayed alarm only. Note that this indicator is used for different purposes in other modes.

• Alarm indicator 2 is displayed in all modes when

any of the five alarms is turned on.

• Alarm indicator 3 is displayed in the Alarm Mode

only. It shows on when the currently displayed alarm is on, and OF when the currently displayed alarm is off.

You can set up to five melody alarms. When a Daily Alarm is turned on, its melody alarm sounds for about 20 seconds at the preset time each day. In the Timekeeping Mode, press any button (except E) to stop the melody alarm after it starts to sound. Pressing E while a melody is playing toggles the display between an animated character and the name of the melody that is playing. When the Hourly Time Signal is turned on, the watch beeps every hour on the hour. Special melodies play on January 1 and December 25, regardless of the current alarm sound setting (beep or melody), and cannot be played by setting the watch ahead or back to these dates.

Normally, the following events occur at midnight on January 1 and December 25, your local time. Note however that these events do not occur in area or countries (for example, parts of Australia) located in time zones that come before (east of) Japan’s time zone.

• The time signal sounds, regardless of whether the hourly time signal is

turned on or off.

• The backlight lights for three seconds.

•

The special melodies play automatically. There is no way to disable play of the special melodies. To stop a melody when it starts to play, press any button besides E.

To set the alarm time for January 1 and December 25

1. While in the alarm Mode, press D to display the alarm number you want to set.

Alarm 1 Alarm 5Alarm 2 Alarm 3 Alarm 4

2. Hold down A until the hour digits start to flash on the display, indicating the setting screen. The alarm is automatically turned on at this time.

3. Press C to change the selection in the sequence shown below.

4. Press D to increase it or B to decrease it. Holding down either button changes the setting at high speed.

5. After you make the settings you want, press A to exit the setting screen.

Hour

SIG: 00 (Hourly Time Signal)

Hour Minutes

Minutes

Alarm indicator 3

Alarm indicator 2

Hourly Time Signal indicator 1

Hourly Time Signal indicator 3

Hourly Time Signal indicator 2

• Hourly Time Signal indicator 1 is displayed in the

Alarm Mode only when the Hourly Time Signal is turned on. Note that this indicator is used for different purposes in other modes.

• Hourly Time Signal indicator 2 is displayed in all

modes when the Hourly Time Signal is turned on.

• Hourly Time Signal indicator 3 is displayed in the

Alarm Mode only. It shows on when the Hourly Time Signal is on, and OF when the Hourly Time Signal is off.

To test the alarm

In the Alarm Mode, display the alarm you want to sound, and then press E to play its melody or beep. You can also press E to play an alarm’s melody while setting the alarm time.

• To stop a playing melody or beep, press any button.

— 3 —

Page 6

Stopwatch Mode

Mode indicator

Current tim

Hours

Minutes

Seconds

1/100 second

Elapsed time measurement

Start

Split time measurement

Start

Split time and 1st-2nd place times

Start

The stopwatch Mode lets you measure elapsed time, split times, and two finishes. The range of the stopwatch is 23 hours, 59 minutes, 59.99 seconds. You can use the EL backlight by pressing E at any time while the stopwatch is operating.

Stop Re-start Stop Clear

Split Split release Stop Clear

Split Stop Split release Clear

First runner finishes.

Second runner finishes. Record time of first runner.

Record time of second runner.

Memo Mode

Mode indicator

Title

Memo number

To input a memo

1. In the Memo Mode, press D to display the memo number you want to set.

2. Hold down A until the first (leftmost) character of the memo title starts to flash on the display. This indicates the input screen.

3. Press C to move the flashing in the sequence shown below. Press E to move the flashing in the opposite direction.

Press . Press .

Title Character 1

Data Character 16

4. Use D or B to scroll through characters at the current location of the flashing. Holding down either button scrolls at high speed.

Press . Press .

Space A to Z Punctuation

Hyphen SymbolsNumbers

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

• Pressing D and B at the same time while inputting memo title or data

clears all title and data. At this time the message “CLEAR” appears on the display.

5. After you input the data you want, press A to exit the input screen.

The Memo Mode lets you store up to five memos, each with an eight-character title and 16 characters of data.

Recalling a Memo

In the Memo Mode, press D to scroll through the Memo titles. When you find the title you want, press B, and the screen alternates between the title and data.

• The display can show only five characters at a time.

Longer text scrolls continuously from right to left. The symbol “ ” indicates that the character or digit to the left is the last, and the character or digit to the right is the first.

• A series of hyphens “ – – – – – ” is displayed for a

memo that does not contain any data.

Title Character 8

Data Character 1

Japanese characters

— 4 —

Page 7

3. DRAWINGS: QW-2461 3-1. LCD DIAGRAM

LC1

L17

L16

L 3

L 4

L 5

L 6

L 7

L 8

L 9

L10

L11

L12

L15

L13

L14

L19

L20

L22

L18

L21

Y12

L25

L24

L23

L27

L26

LC2

L28

COL

SIG DSTALM

X28

DAYS

SEG.

L3 L4 L5 L6 L7 L8 L9 L10 L11 L12 L13 L14 L15 L16 L17 L18 L19 L20 L21 L22 L23 L24 L25 L26

COM.

L C 1

c9 e8 g8

X6Y12 X7Y12 X8Y12

X9Y12 X10Y12 X11Y12 X12Y12 X13Y12 X14Y12 X15Y12 X16Y12 X17Y12 X18Y12 X19Y12 X20Y12 X21Y12 X22Y12

L C 2

X6Y11 X7Y11 X8Y11

X9Y11 X10Y11 X11Y11 X12Y11 X13Y11 X14Y11 X15Y11 X16Y11 X17Y11 X18Y11 X19Y11 X20Y11 X21Y11 X22Y11

LC8

L C 3

K2 X0Y8 X1Y8 X2Y8 X3Y8 X4Y8 X5Y8 X6Y8 X7Y8 X8Y8 X9Y8

X10Y8 X11Y8 X12Y8 X13Y8 X14Y8 X15Y8 X16Y8 X17Y8 X18Y8 X19Y8 X20Y8 X21Y8 X22Y8

LC7

LC6

L C 4

K3 X0Y9 X1Y9 X2Y9 X3Y9 X4Y9 X5Y9 X6Y9 X7Y9 X8Y9 X9Y9

X10Y9 X11Y9 X12Y9 X13Y9 X14Y9 X15Y9 X16Y9 X17Y9 X18Y9 X19Y9 X20Y9 X21Y9 X22Y9

L50

L49

L48

L C 5

K4 X0Y10 X1Y10 X2Y10 X3Y10 X4Y10 X5Y10 X6Y10 X7Y10 X8Y10 X9Y10

X10Y10 X11Y10 X12Y10 X13Y10 X14Y10 X15Y10 X16Y10 X17Y10 X18Y10 X19Y10 X20Y10 X21Y10 X22Y10

L47

L46

L C 6

f8 a8 b8

X6Y5 X7Y5 X8Y5

X9Y5 X10Y5 X11Y5 X12Y5 X13Y5 X14Y5 X15Y5 X16Y5 X17Y5 X18Y5 X19Y5 X20Y5 X21Y5 X22Y5

L45

L44

L C 7

K0 X0Y6 X1Y6 X2Y6 X3Y6 X4Y6 X5Y6 X6Y6 X7Y6 X8Y6 X9Y6

X10Y6 X11Y6 X12Y6 X13Y6 X14Y6 X15Y6 X16Y6 X17Y6 X18Y6 X19Y6 X20Y6 X21Y6 X22Y6

L36

L34

L35

L37

L38

L39

L40

L41

L42

L43

L C 8

K1 X0Y7 X1Y7 X2Y7 X3Y7 X4Y7 X5Y7 X6Y7 X7Y7 X8Y7 X9Y7

X10Y7 X11Y7 X12Y7 X13Y7 X14Y7 X15Y7 X16Y7 X17Y7 X18Y7 X19Y7 X20Y7 X21Y7 X22Y7

SEG.

L27 L28 L29 L30 L31 L32 L33 L34 L35 L36 L37 L38 L39 L40 L41 L42 L43 L44 L45 L46 L47 L48 L49 L50

COM.

L C 1

e7 g7 c7 e6 g6

c6 X22Y3 X21Y3 X20Y3 X19Y3 X18Y3 X17Y3 X16Y3 X15Y3 X14Y3 X13Y3 X12Y3 X11Y3 X10Y3

X9Y3 X8Y3 X7Y3 X6Y3

L C 2

X22Y2 X21Y2 X20Y2 X19Y2 X18Y2 X17Y2 X16Y2 X15Y2 X14Y2 X13Y2 X12Y2 X11Y2 X10Y2

X9Y2 X8Y2 X7Y2 X6Y2

L33

L C 3 X23Y8 X24Y8 X25Y8 X26Y8 X27Y8 X28Y8

K7 b0 a0

f0 b1 a1 b2 a2

DST

SIG

ALM

b4 a4 a5

L31

L32

X23Y9 X24Y9 X25Y9 X26Y9 X27Y9 X28Y9

L30

LC 4

K8 c0 g0 c1 g1 f1 c2 g2 f2 b3 g3 f3

COL

g4 f4 b5 g5

L29

X23Y10 X24Y10 X25Y10 X26Y10 X27Y10 X28Y10

DAYS

LC5

L C 5

K9 d0 e0

d1 e1

d2 e2 c3 d3 e3 c4 d4 e4 c5 d5 e5

LC4

LC3

L C 6

f7 a7 b7

f6 a6 b6

X22Y4 X21Y4 X20Y4 X19Y4 X18Y4 X17Y4 X16Y4 X15Y4 X14Y4 X13Y4 X12Y4 X11Y4 X10Y4

X9Y4 X8Y4 X7Y4 X6Y4

L C 7 X23Y6 X24Y6 X25Y6 X26Y6 X27Y6 X28Y6

K5 X22Y1 X21Y1 X20Y1 X19Y1 X18Y1 X17Y1 X16Y1 X15Y1 X14Y1 X13Y1 X12Y1 X11Y1 X10Y1

X9Y1 X8Y1 X7Y1 X6Y1

L C 8 X23Y7 X24Y7 X25Y7 X26Y7 X27Y7 X28Y7

K6 X22Y0 X21Y0 X20Y0 X19Y0 X18Y0 X17Y0 X16Y0 X15Y0 X14Y0 X13Y0 X12Y0 X11Y0 X10Y0

X9Y0 X8Y0 X7Y0 X6Y0

— 5 —

Page 8

3-2. CIRCUIT DIAGRAM

VCC

WPWPSCL

SDA

Vss A2 A1 A0

EEPROM

SCL

LCD

Xtal

L3 L50 LC1 LC8

XTB

L1 , L2 * 1

L51 ~ L52 * 1

VREF1 GNDA

VREF

C11

VDD2A

LD1*1 VDD2 GND VCH VDSP VDD1 VC1 VC2 VHF VC3 VC4VDD3

BAT

LL2

Di2

SDI*1

CSB*1

BD1 BD2 MIN

LD2*1

EMP*1

LSI

TOTAL 107 PINS BONDING 97 PINS Display 60 Others 47

ENV SDOSCK SCUT

KI1

KI2

KI3

KI4

KI5

KI8

KC5*1

KI9 KC4 KC3 KC2

KI7

KI6 KC1

SDA

Vcc

C12

Tr1

BACK

FRONT

GND

L-

VOUT

LL1

L+

CLF2

INV

CLF1

C10

V+

✽ 1. No bonding

— 6 —

Page 9

3-3. CHECKING TERMINALS AND COMPONENT

7. Cushion/6 (7211 0064)

4. Oscillator/Crystal

Xtal

(1004 1131)

KI2

ELD

KI3

Tr1

Di2

Diode

PCB WITH LSI

CLF1

KI5

Transistor

Memory/ External

XTB

GND

CLF2

CT 3.

Capacitor/Trimmer

(1001 0950)

KI9

GND

KI6

KC4

KC3

KI6

KI7 KC2 KI6

KC2

Capacitor/Chip

C11

C4 Capacitor/Chip

C9 Capacitor/Chip

GND

KI4

BD2

BD1

BD2

BD1

VDD2

KI1

VCC

KI4

VCC

VDD2

SCUT

VCC

SCK

SDO

VCC

GND

VCC

KI1

BD1

C2 Capacitor/Chip

VREF

GND

SCK

BD2

VDD2

GND

VC3

GND

VC4

VDD2

CLF1

CLF2

KC1

VDD2

C3 Capacitor/Chip

GND

VDD2

VC1

VC3

VCH

VHF

VC1

L+

VC2

GND

L-

KI5

VDSP

GND

VCH

GND

SDO

KI2

VDD1

VDD3

GND

KI3

L+ ELD LGND

GND

C10

Capacitor/Chip

Resistor/Chip

CoilLL2

Capacitor/Chip

C12

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

6. Cushion/506 (7211 9631)

C7 Capacitor/Chip

Capacitor/Tantalum

— 7 —

6. Cushion/506 (7211 9631)

Inverter

INV

C1 Capacitor/Chip

LL1

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

C8 Capacitor/

Capacitor/ Tantalum

Coil

Chip

Page 10

4. EXPLODED VIEW: QW-2461

12 (1006 5672)

14 (7230 0616)

1 (1006 5673)

2 (1006 5674)

9 (1002 1815)

PCB (Unrepairable)

13 (7230 0623)

Battery/Lithium (CR1620)

5 (1002 7903)

11 (7233 2629)

8 (7231 1885)

10 (7229 0790)

— 8 —

Page 11

5. PARTS LIST: QW-2461

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 ------------------------------------------B Rank ------------------------------------------C Rank -------------------------------------------

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

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".

Very Important Important Less important

Item Code No. Parts Name S

7640 5043 MODULE/WITHOUT MOVEMENT QW-2461YC-01TK BGM-220LV-7 1 A 1 1006 5673 LCD S2252-01TTP QW-2461YC-01TK 1 A 2 1006 5674 EL YEL-1564-A-91-ANG QW-2461YC-01TK 1 A 3 1001 0950 CAPACITOR/TRIMMER CTZ2E-30C-W2-P QW-2461YC-01TK 1 B 4 1004 1131 OSCILLATOR/CRYSTAL DT-26SJ(T) QW-2461YC-01TK 1 B 5 1002 7903 CONTACT/BATTERY(-) Q39603B-1 QW-2461YC-01TK 1 C 6 7211 9631 CUSHION/506 Q49364-1 QW-2461YC-01TK 2 C 7 7211 0064 CUSHION/6 Q4914-1 QW-2461YC-01TK 1 C 8 7231 1885 HOLDER/BATTERY Q360562-1 QW-2461YC-01TK 1 C 9 1002 1815 INTERCONNECTOR Q461567A-1 QW-2461YC-01TK 2 C

10 7229 0790 LABEL/1856 Q461569-1 QW-2461YC-01TK 1 C 11 7233 2629 SHEET/INSULATION Q461568-1 QW-2461YC-01TK 1 C 12 1006 5672 PANEL Q370176-1 QW-2461YC-01TK 1 C 13 7230 0623 SPRING/COIL Q451200-1 QW-2461YC-01TK 2 B 14 7230 0616 SPRING/COIL 1199-1 Q437728B-1 QW-2461YC-01TK 2 B

BATTERY/LITHIUM CR1620 QW-2461YC-01TK 1

For the prices and minimum order/supply quantities of the above parts, refer to the Parts Price List P.P.L.-576.

ecification Applicable Q R

Notes: Q - Used quantity

R - Rank

— 9 —

Page 12

6. PRECAUTIONS FOR REPAIR: QW-2461 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 negative (–) side of the main plate with the metallic tweezers. The contact should be made for about two seconds.

2. On removing of the module from the case, please insert the precision screw driver between the module

and the case pointed by an arrow.

Metallic tweezers

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 D button, press A and C buttons at the normal time keeping 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”

Push any button except for D 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-2461

— 10 —

Page 13

CASIO TECHNO CO.,LTD.

Overseas Service Division

Nishi-Shinjuku Kimuraya Bldg. 1F 5-25, Nishi-Shinjuku 7-Chome Shinjuku-ku, Tokyo 160-0023, Japan