Casio QW-2489 Troubleshooting guide

SERVICE MANUAL
& PARTS LIST
(WITHOUT PRICE)
QW-2489
MODULE NO.
R
REF. NO. S/M-760
DEC. 2001
BGM-221

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 —
1. SPECIFICATIONS: QW-2489
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
Item Detail

— 2 —
2. OPERATION CHART: QW-2489
•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
General Guide
•Press CC
CC
Cto change from mode to mode.
•Pressing EE
EE
Ein 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
PressCC
CC
C.
Timekeeping Mode
Press DD
DD
Dto toggle between 12-hour and 24-hour
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 Aand Pindicators do not appear for 24-hour
timekeeping.
•Pressing BB
BB
Bplays a randomly selected melody. To
stop a playing melody, press any button besides EE
EE
E.
•Pressing EE
EE
Ewhile a melody is playing toggles the
display between an animated character and the
name of the melody.
•Press EE
EE
Eto illuminate the display for about three
seconds. When 12-hour timekeeping is being used,
pressing EE
EE
Ealsodisplaysananimatedcharacter.
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 makeTimekeeping Mode settings
1. While in theTimekeeping Mode, hold down AA
AA
Auntil the second’s digits flash
on the display, indicating the setting screen.
2.Press CC
CC
Cto move the flashing in the sequence shown below. Press EE
EE
Eto move
the flashing in the opposite direction.
Seconds DST Hour Minutes Year
Contrast
(CNT)Volume (VOL)Sound
(SOUND)MonthDay
Press . Press .
Month
Day of week
Day
PM indicator
Hour Minutes
Seconds
DST indicator 2
3.While the second’s setting is selected (flashing),
press DD
DD
DorBB
BB
Btoreset it to 00.
•If you press DD
DD
Dor BB
BB
Bwhilethesecond’ssetting is in
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 DD
DD
DorBB
BB
Btotoggleit on and off.
•DST indicator 1 is displayed in theTimekeeping
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 theTimekeeping
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.
•While the SOUND (button tones) setting is selected, press DD
DD
Dor BB
BB
Bto turn the
beep and musical tone on and off, as shown below.
•Changing the SOUND also changes the Hourly Time Signal tones.
Beep Musical tone Off
Press . Press .
•Whilethe VOL setting is selected, pressDD
DD
Dor BB
BB
Btotoggle it between loud and soft.
Loud Soft
Press or .
DST indicator 2
DST indicator 1
•With some models, changing the volume setting affects volume very little.
•While the CNT setting is selected, press DD
DD
Dto make the display darker, or BB
BB
Bto
make it lighter.
•While any other setting is selected (flashing), press DD
DD
Dto increase it or BB
BB
Bto
decrease it. Holding down either button changes the setting at high speed.
4. After you make the settings you want, press AA
AA
Ato 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 EE
EE
Ein 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
Day counter
record number
Text
Number of days DAYS indicator
Year
Month
Day
Target Date
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 DD
DD
Dto scroll through the Day Counter record
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 DD
DD
Dto display a record number you want to
set.
2. Hold down AA
AA
Auntil the first (leftmost) text character starts to flash on the
display. This indicates the input screen.
3. Press CC
CC
Cto move the flashing in the sequence shown below. Press EE
EE
Eto move
the flashing in the opposite direction.
Press . Press .
Character 1
Day
Character 12
Year
Month
4. While the flashing is located within the text area, use DD
DD
Dor BB
BB
Bto 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 Japanese
characters
Hyphen Symbols
Numbers
See the “CHARACTER LIST” at the back of this manual for details.
5. While any other setting is selected, press DD
DD
Dto increase it or BB
BB
Bto decrease it.
Holding down either button changes the setting at high speed.
•Pressing DD
DD
Dand BB
BB
Bat 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 DD
DD
Dand BB
BB
Bat 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 AA
AA
Ato exit the input screen.
•The date can be set within the range of January 1, 1940 to December 31,
2039.

— 3 —
Alarm Mode
Mode indicator
Alarm number
Melody name
Hour Minutes
Current time
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 EE
EE
E) to stop the melody alarm after
it starts to sound. Pressing EE
EE
Ewhile 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.
To set the alarm time
1.While in the alarm Mode, press DD
DD
Dto 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 AA
AA
Auntil the melody setting starts to flash on the display, indicating
the setting screen. The alarm is automatically turned on at this time.
3.Press CC
CC
Cto change the selection in the sequence shown below.
Melody Setting Hour Minutes
4. While melody setting is selected, use DD
DD
Dor BB
BB
Bto scroll through melody names.
Setting Alarm Sound
– 0
– 1
– 2
– 3
– 4
– 5
–
Ramdom play of melodies 1, 2, 3, 4 and 5
Melody 1
Melody 2
Melody 3
Melody 4
Melody 5
Beeper
Press .
Press .
See the “MELODY LIST” at the back of this manual for the names of
melodies.
Some melody alarms tune names may be displayed in abbreviated format.
•While any other setting is selected, press DD
DD
Dto increase it or BB
BB
Bto decrease it.
Holding down either button changes the setting at high speed.
5. After you make the settings you want, press AA
AA
Ato 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 a melody alarm
•Press any button (except EE
EE
E) to stop a melody alarm after it starts to sound.
To turn a daily Alarm or the HourlyTime Signal on and off
1.Use DD
DD
Dto display the alarm you want to turn on or off, or the screen for
turning the HourlyTime Signal on or off.
2.Press BB
BB
Bto toggle the displayed alarm or Hourly Time Signal on and off.
alarm is off.
•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 EE
EE
Eto play its melody or beep.
You can also press EE
EE
Eto play an alarm’s melody while
setting the alarm time.
•To stop a playing melody or beep, press any button.
Hourly Time Signal
indicator 1
Hourly Time Signal
indicator 2
Hourly Time Signal
indicator 3
•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 indicator 1
Alarm indicator 2
Alarm indicator 3
Stopwatch Mode
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 EE
EE
Eat any
time while the stopwatch is operating.
Mode indicator
Hours
Minutes
Seconds
1/100 second
Current time
Elapsed time measurement
Start Stop Re-start Stop Clear
Start Split Split release Stop Clear
Start Split Stop Split release Clear
Split time measurement
Split time and 1st-2nd place times
First runner
finishes. Second runner finishes.
Record time of
first runner.
Record time of
second runner.
Memo Mode
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 DD
DD
Dto scroll through the
Memo titles. When you find the title you want, press
BB
BB
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.
To input a memo
1.In the Memo Mode, press DD
DD
Dto display the memo number you want to set.
2. Hold down AA
AA
Auntil the first (leftmost) character of the memo title starts to
flash on the display. This indicates the input screen.
3. Press CC
CC
Cto move the flashing in the sequence shown below. Press EE
EE
Eto move
the flashing in the opposite direction.
Press . Press .
Title Character 8
Data Character 1
Title Character 1
Data Character 16
Mode indicator
Memo number
Title
4. Use DD
DD
Dor BB
BB
Bto 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 Japanese
characters
Hyphen Symbols
Numbers
See the “CHARACTER LIST” at the back of this manual for details.
•Pressing DD
DD
Dand BB
BB
Bat 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 AA
AA
Ato exit the input screen.

— 4 —
3. DRAWINGS: QW-2489
3-1. LCD DIAGRAM
PM
AM
f5
a5
b5
g5
c5
e5
d5 d4
e4
g4
f4
a4
b4
c4
COL
e3
g3
f3
a3
b3
c3
d3
a2
b2
c2
g2
d2
e2 f2
e1
d1
c1
g1
b1
a1
f1
f0
a0
b0
g0
e0
d0
c0
DAYS
SIG DSTALM
b9
c9
f8
a8
b8
g8
c8
d8
e8
X0
Y0
Y12
d7
e7 f7
g7
a7
b7
c7
e6
d6
c6
g6
f6
a6
b6
K5
K6
K7
K8
K9
K0
K1
K2
K3
K4
L3
L4
L5
L6
L7
L8
L9
L10
L11
L12
L13
L14
L15
L16
L17
L18
L19
L20
L21
L22
L23
L24
L25
L26
L C 1
c9
e8
g8
c8
X6Y12
X7Y12
X8Y12
X9Y12
X10Y12
X11Y12
X12Y12
X13Y12
X14Y12
X15Y12
X16Y12
X17Y12
X18Y12
X19Y12
X20Y12
X21Y12
X22Y12
L C 2
d8
X6Y11
X7Y11
X8Y11
X9Y11
X10Y11
X11Y11
X12Y11
X13Y11
X14Y11
X15Y11
X16Y11
X17Y11
X18Y11
X19Y11
X20Y11
X21Y11
X22Y11
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
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
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
L C 6
b9
f8
a8
b8
X6Y5
X7Y5
X8Y5
X9Y5
X10Y5
X11Y5
X12Y5
X13Y5
X14Y5
X15Y5
X16Y5
X17Y5
X18Y5
X19Y5
X20Y5
X21Y5
X22Y5
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
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
L27
L28
L29
L30
L31
L32
L33
L34
L35
L36
L37
L38
L39
L40
L41
L42
L43
L44
L45
L46
L47
L48
L49
L50
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
d7
d6
X22Y2
X21Y2
X20Y2
X19Y2
X18Y2
X17Y2
X16Y2
X15Y2
X14Y2
X13Y2
X12Y2
X11Y2
X10Y2
X9Y2
X8Y2
X7Y2
X6Y2
L C 3
X23Y8
X24Y8
X25Y8
X26Y8
X27Y8
X28Y8
K7
b0
a0
f0
b1
a1
b2
a2
DST
a3
SIG
ALM
b4
a4
a5
f5
PM
LC 4
X23Y9
X24Y9
X25Y9
X26Y9
X27Y9
X28Y9
K8
c0
g0
c1
g1
f1
c2
g2
f2
b3
g3
f3
COL
g4
f4
b5
g5
AM
L C 5
X23Y10
X24Y10
X25Y10
X26Y10
X27Y10
X28Y10
K9
d0
e0
DAYS
d1
e1
d2
e2
c3
d3
e3
c4
d4
e4
c5
d5
e5
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
L49 LC8 LC7 LC6 LC5 LC4 LC3 L29 L30 L31 L32 L33 L34 L35
L36
L37 L38 L39 L40 L41 L42 L43 L44 L45 L48 L46 L47 L50
L25 L24 L23 L17 L16 L15 L 3 L 4 L19 L20 L22 L21 L27 L18
LC1
LC2 L26 L28 L 5 L 6 L 7 L 8 L 9 L10 L11 L12 L13 L14
COM.
SEG. COM.
SEG.
X28

— 5 —
TOTAL 107 PINS
BONDING 97 PINS
Display 60
Others 47
LSI
+
XTB
XT
AC
T1
T2
T3
VREF1
LCD LL2
Di2
PZ
L1 , L2 * 1
L51 ~ L52 * 1
SDI*1
CSB*1 LD2*1 EMP*1
GNDA
VREF
VDD2A
LD1*1 VDD2 GND VCH VDSP VDD1 VC1 VC2 VHF VC3 VC4VDD3
C7
C8
C4 C3 C2
+
C6 C5
C1
LL1 C10
EL
FRONT
BACK
BAT
CT
C9
C11
Xtal BD1 BD2 MIN
ENV SDOSCK SCUT
VCC
Vcc C12
Vss A2 A1 A0
WP
WP
SCL
SCL
SDA
SDA
EEPROM
L3 L50 LC1 LC8 KI1
KI2
KI3
KI4
KI5
KI8
KC5*1
S1
S2
S3
S4
F0
KI9
KC4
KC3
KC2
KI7
KI6
KC1
R2
Tr1
E'
CLF2
CLF1
V+
GND
L-
VOUT
L+
INV
✽1. No bonding
3-2. CIRCUIT DIAGRAM

— 6 —
Top view of P.C.B. ass'y Bottom view of P.C.B. ass'y
3-3. CHECKING TERMINALS AND COMPONENT
ELD
KI7 KC2 KI6
KI6
KI6
KC3
KC4
KI4
KI5
KI2
KI3 KC2
BD2 BD2 BD1 BD1
GND
VDD2
GND
CLF1 CLF2
XTB
KI9 GND
XT
A4
KI1
SCUT
VDD2
VCC
VDD2
GND
VREF
GND
VREF VDD2
VDD1
GND
VCC
GND VC3
VC4
VDD3
WP
VCC
AC
VCC
WP
VCC
BD1
L
VDD2
CLF1
CLF2
KC1
L+
ELD
L-
BD2
GND
GND
SDO
VDSP
VC1
VC3
L
GND
KI4 KI2
KI1
GND
XT
SCK
VCH
GND
VC1
VC2
GND
VHF
GND
VDSP GND
KI5
L+
L-
VCH
KI3
GND
VDD2
GND
GND
SCK SDO WP
GND GND
GND
GND
C9 Capacitor/Chip
C1 Capacitor/Chip
C7 Capacitor/Chip
C8 Capacitor/
Chip
6. Cushion/506
Memory/
External
(7211 9631)
Resistor/Chip
6. Cushion/506
(7211 9631)
Capacitor/
Tantalum
Capacitor/Tantalum Coil
Diode
4. Oscillator/Crystal
(1004 1131) (1001 0950)
CT 3. Capacitor/Trimmer
Xtal
CoilLL2
Capacitor/Chip
C10
LL1
Di2
Inverter
INV
Capacitor/Chip
C12
C5
C6
Capacitor/Chip
C11
7. Cushion/6
(7211 0064)
C2 Capacitor/Chip
C4 Capacitor/Chip
C3 Capacitor/Chip
Transistor
PCB WITH LSI
R2
Tr1

— 7 —
4. EXPLODED VIEW: QW-2489
Battery/Lithium
(CR1620)
11 (7233 2629)
PCB (Unrepairable)
9 (1002 1815)
1 (1005 8548)
2a (7020 6080)
2b (7020 6086)
2c (7020 6081)
10 (7229 0790)
5 (1002 7903)
13 (7230 0623)
8 (7231 1885)
12 (7233 2732)
14 (7230 0616)

5. PARTS LIST: QW-2489
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 ------------------------------------
-
Less important
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".
Item Code No. Parts Name S
p
ecification A
pp
licable Q R
7640 5044 MODULE QW-2489YC-01TK BGM-221V-3 1 A
7640 5045 MODULE QW-2489YC-02TK BGM-221V-8 1 A
7640 5046 MODULE QW-2489YC-03TK BGM-221DM-1/2 1 A
1 1005 8548 LCD S2252-01THP QW-2489YC Common 1 A
2a 7020 6080 EL YEL-1564-A-01 QW-2489YC-01TK 1 A
2b 7020 6086 EL YEL-1564-A-63 QW-2489YC-02TK 1 A
2c 7020 6081 EL YEL-1564-A-03 QW-2489YC-03TK 1 A
3 1001 0950 CAPACITOR/TRIMMER CTZ2E-30C-W2-P QW-2489YC Common 1 B
4 1004 1131 OSCILLATOR/CRYSTAL DT-26SJ(T) QW-2489YC Common 1 B
5 1002 7903 CONTACT/BATTERY(-) Q39603B-1 QW-2489YC Common 1 C
6 7211 9631 CUSHION/506 Q49364-1 QW-2489YC Common 2 C
7 7211 0064 CUSHION/6 Q4914-1 QW-2489YC Common 1 C
8 7231 1885 HOLDER/BATTERY Q360562-1 QW-2489YC Common 1 C
9 1002 1815 INTERCONNECTOR Q461567A-1 QW-2489YC Common 2 C
10 7229 0790 LABEL/1856 Q461569-1 QW-2489YC Common 1 C
11 7233 2629 SHEET/INSULATION Q461568-1 QW-2489YC Common 1 C
12 7233 2732 SPACER Q461570-1 QW-2489YC Common 1 C
13 7230 0623 SPRING/COIL 1416-1 Q451200-1 QW-2489YC Common 2 B
14 7230 0616 SPRING/COIL 1199-1 Q437728B-1 QW-2489YC Common 2 B
7111 5056 BATTERY/LITHIUM CR1620 QW-2489YC Common 1
For the
p
rices and minimum order/su
pp
l
y
q
uantities of the above
p
arts, refer to the Parts Price List P.P.L.-577.
Notes: Q - Used quantity
R - Rank — 8 —

— 9 —
AC
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 Aand Cbuttons 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 Dbutton.
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.
6. PRECAUTIONS FOR REPAIR: QW-2489
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
QW-2489

CASIO TECHNO CO.,LTD.
Overseas Service Division
Nishi-Shinjuku Kimuraya Bldg. 1F
5-25, Nishi-Shinjuku 7-Chome
Shinjuku-ku, Tokyo 160-0023, Japan