Casio BG-153 Troubleshooting guide

(WITHOUT PRICE)
SERVICE MANUAL
& PARTS LIST
REF. NO. S/M-729
JANUARY 2001
QW-2285
QW-2286
MODULE NO.
R
BG-153
(QW-2285)
BG-154
(QW-2286)

- 1 -
CONTENTS
1. SPECIFICATIONS : QW-2285 / 2286
1. SPECIFICATIONS • • • • • • • • • • • • • • • • • • • • • • • • • • 1
2. OPERATION CHART • • • • • • • • • • • • • • • • • • • • • • • • 2
3. DRAWINGS • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 6
3-1. BLOCK DIAGRAM • • • • • • • • • • • • • • • • • • • • • • • • 6
3-2. CHECKING TERMINALS AND COMPONENTS• • • • 7
4. EXPLODED VIEW • • • • • • • • • • • • • • • • • • • • • • • • • • 8
5. PARTS LIST • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 9
6. PRECAUTIONS FOR REPAIR • • • • • • • • • • • • • • • • • • 10
6-1. AC (ALL CLEAR) AND REMOVING OF MODULE • • 10
6-2. ACCURACY CHECKING • • • • • • • • • • • • • • • • • • • 10
Item Detail Item Detail
Battery CR1616 Accuracy ±15sec./month
Battery life Approx. 24 months Accuracy setting system Trimmer capacitor
Current consumption 1.12 µA maximum Accuracy checking See page 10
Alarm system Piezo plate on Back cover Accuracy setting +0.25~+0.35sec./day
Function
QW-2285
• Shock resistant
• Electro-luminescent backlight
Afterglow
• Memory function
Memory capacity: Up to 25 sets of data, each set
including; Name (8 characters) and telephone
number (12 digits)
Other: Auto-sort
• 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.
• 1/100-second stopwatch
Measuring capacity: 23:59'59.99"
Measuring modes: Elapsed time, split time,
1st-2nd place times
• Dual time
• Daily alarm
• Hourly time signal
• Auto-calendar (to year 2039)
• 12/24-hour formats
• Regular timekeeping: Hour, minutes, seconds,
am/pm, month, date, day, daylight saving on/off
QW-2286
• Shock resistant
• Electro-luminescent backlight
Afterglow
• Memory function
Memory capacity: Up to 25 sets of data, each set
including; Name (8 characters) and telephone
number (12 digits)
Other: Auto-sort
• Day Counter
Automatically counts down the days from the current
date to a target date.
Memory capacity: 5 records (8 character of text)
A mark appears on the display to let you know when
a target date is reached.
• 1/100-second stopwatch
Measuring capacity: 23:59'59.99"
Measuring modes: Elapsed time, split time,
1st-2nd place times
• Dual time
• Daily alarms
5 independent daily alarms
• Hourly time signal
• Auto-calendar (to year 2039)
• 12/24-hour formats
• Regular timekeeping: Hour, minutes, seconds,
am/pm, month, date, day, daylight saving on/off

- 2 -
2. OPERATION CHART : MODULE QW-2285
GENERAL GUIDE
Press to change from mode to mode.
Pressing in any mode (except when making any settings) illuminates the display for about 3 seconds.
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 the Data Bank Mode or Day Counter Mode, the watch automatically reverts to the normal timekeeping screen.
Timekeeping Mode Data Bank Mode
Press .
Day Counter Mode Alarm Mode Stopwatch Mode Dual Time Mode
TIMEKEEPING MODE
Press to toggle between 12-hour and 24-hour timekeeping.
Seconds
Day of week
PM indicator MinutesHour
Year - Month - Day DST on indicator
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 when you are using 24-hour timekeeping.
To set the time and date
1.While in the Timekeeping Mode, hold down until the
seconds digits flash on the display, indicating the
setting screen.
2.Press to move the flashing in the sequence shown below.
DST
Seconds
Day
Hour
Year
Month Minutes
3.While the seconds setting is selected (flashing), press to reset it to 00. If you
press 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 setting is selected (DST on indicator is flashing), press to
toggle it on (on) and off (OF). If DST setting is on, the DST on indicator is shown
in the Timekeeping Mode, Day Counter Mode and Alarm Mode.
4.While any other setting is selected (flashing), press to increase it or to
decrease it. Holding down either button changes the setting at high speed.
5.After you make the settings you want, press 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.
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.
ABOUT THE BACKLIGHT
Press to illuminate the display for about 3 seconds.
The backlight of this watch employs an electro-luminescent (EL) light, which loses
its illuminating power after very long term use.
Frequent use of the backlight shortens the battery life.
The watch emits an audible sound whenever the display is illuminated. This does
not indicate malfunction of the watch.
The illumination provided by the backlight may be hard to see when viewed under
direct sunlight.
The backlight automatically turns off whenever an alarm sounds.
DATA BANK MODE
The Data Bank Mode lets you store up to 25 records, each with a name (up to eight
characters) and a phone number (up to 12 digits). Data is automatically stored into
alphabetical order based on the name data. You can recall records by scrolling
through them on the display.
Mode indicator
Text area
Number area
Remaining memory
The record on the display when you exit the Data Bank Mode appears first the next
time you enter the Data Bank Mode.
To input a new Data Bank record
1.In the Data Bank Mode, press until the new data
screen appears.
If the new data screen does not appear when you
press and , it means that memory is full. To
store another record, you will first have to delete a
record stored in memory.
2.Hold down and a cursor appears on the text area.
3.Use or to scroll through characters at the current cursor position. Characters
scroll in the sequence shown below.
A to Z 0 to 9
(Space)
Press .
Press .
Holding down either button scrolls at high speed.
4.When the character you want is at the current cursor position, press to move the
cursor to the right.
5.Repeat the steps 3 and 4 to input the rest of the characters.
You can input up to eight characters for the name, though only three characters
are visible at a time. If the name you input has fewer than eight characters, use
to move the cursor to the eighth space (which means you would press
three times after inputting a five-character name).
Holding down to move the cursor at high speed.
6.After you input the name, use to move the cursor to the number area.
Pressing while the cursor is located at the eighth character of the text area
advances to the number area. Pressing while the cursor is located at the 12th
digit of the number area returns to the text area.
7.Use or to scroll through characters (hyphen, numbers, space) at the current
cursor position on the number area. Characters scroll in the sequence shown
below.
0 to 9 (Space)
Press .
Press .
Holding down either button scrolls characters at high speed.
You can input up to 12 digits for the number.
8.After inputting the name and number of the record, press to store it and exit the
setting screen.
The display can show only three name characters at a time. Longer names scrolls
continuously from right to left. The symbol “ ” indicates that the character to the
left is the last, and the character to the right is the first.
To recall Data Bank data
In the Data Bank Mode, press to scroll through the stored data items.
Holding down scrolls at high speed.
To edit Data Bank data items
1.In the Data Bank Mode, press to display the data you want to edit.
2.Hold down until the cursor appears in the display.
3.Use to move the cursor to the character you want to change.
Holding down to move the cursor at high speed.
4.Use or to change the character.
Holding down either button scrolls characters at high speed.
See step 3 of “To input a new Data Bank record” for information on inputting
name characters, and step 7 for inputting number characters.
5.After making the changes that you want, press to store them and exit the setting
screen.
To delete a Data Bank record
1.In the Data Bank Mode, press to display the record you want to delete.
2.Hold down until the cursor appears in the display.
3.Press and at the same time. The message “CLR” appears in the display,
indicating that the record was deleted.
After the record is deleted, the cursor appears in the text area, ready for input.
4.Input a new record or press to exit the setting screen.
[ New Data Screen ]
CC
C
C C
C
C
C
C
C
C
C
D
D
D
D
D
D
D
D
DD
DD
D
D
D
B
B
B
B
B
B
B
B
A
A
A
A
A
A
A
A

- 3 -
DAY COUNTER MODE
The Day Counter Mode lets you count the number of days from the Timekeeping
Mode’s current date to a specific target date.
This watch has five Day Counter records, each of which can be assigned up to 8
characters of text and a target date. Whenever the date specified by a day counter
matches the date of the Timekeeping Mode (regardless of the day counter’s year
setting), the DAYS indicator flashes on the Timekeeping Mode and Dual Time Mode
screen. In the Day Counter Mode, the DAYS indicator flashes on the screen of the
particular day counter whose date matches the date of the Timekeeping Mode.
The initial default date for all Day Counters is January 1, 2001.
Number of days
Year - Month - Day
Target date
Mode indicator
Text
DAYS indicator
Positive count value
indicates a future date,
while a negative value
indicates a past date.
The day counter on the display when you exit the Day Counter Mode appears first
the next time you enter the Day Counter Mode.
Recalling Day Counter Data
In the Day Counter Mode, press to scroll through the day counters.
To set the target date
1.In the Day Counter Mode, press to display the day counter you want to set.
2.Hold down until the flashing cursor appears in the text area. This indicates the
input screen.
3.Press to move the flashing in the sequence shown below.
Holding down to move the cursor at high speed.
1st digit
Day
8th digit
YearMonth
Press .
4.While the cursor is in the text area, use or to scroll through characters at the
current cursor position. Characters scroll in the sequence shown below. Holding
down either button scrolls at high speed.
A to Z 0 to 9
(Space)
Press .
Press .
5.While the cursor is in the date area, press to increase the number or to
decrease it. Holding down either button changes at high speed.
To clear a Day Counter record, press and at the same time while the
cursor is in either the text area or number area. The message “CLR” appears on
the display, the characters in the text area are deleted, and today’s date is set as
the target date. After the clear operation is complete, you can create a new record
by changing the date setting.
6.After you make the settings you want, press to exit the input screen.
The date can be set within the range of January 1, 1940 to December 31, 2039.
ALARM MODE
When a Daily Alarm is turned on, the alarm sounds for 20
seconds each day when the current Timekeeping Mode
time matches the alarm time setting. Note that the alarm
setting has no relation to the Dual Time Mode time.
Press any button to stop the alarm after it starts to sound.
When the Hourly Time Signal is turned on, the watch
beeps every hour on the hour.
The alarm on the display when you exit the Alarm Mode
appears first the next time you enter the Alarm Mode.
To set the alarm time
1.Hold down until the hour digits start to flash on the
display, indicating the setting screen.
At this time, the alarm is turned on automatically.
2.Press to move the flashing in the sequence shown below.
Minutes
Hour
3.Press to increase the selected digits and to decrease them. Holding down
either button changes the setting at high speed.
4.After you set the alarm time, press to exit the setting screen.
The format (12-hour and 24-hour) of the alarm time matches the format you select
in the Timekeeping Mode.
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.
To switch the daily Alarm and the Hourly Time Signal on and off
Press while in the Alarm Mode to change the status of the Daily Alarm and Hourly
Time Signal in the following sequence.
Both ON Both OFF Daily Alarm
only Hourly Time
Signal only
To test the alarm
In the Alarm Mode, hold down to sound the alarm.
Holding down to test the alarm also changes the Daily Alarm or Hourly Time
Signal on/off settings.
Mode
indicator
Current
time Alarm on
indicator
Hourly time signal
on indicator
Hour
AM indicator
Minutes
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 at any time while the stopwatch
is operating.
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.
Mode indicator
1/100 second
Minutes
Seconds
Hours
DUAL TIME MODE
The Dual Time Mode lets you keep track of the time in
another time zone.
To set the dual time
Press to increase the time by 30 minutes.
Holding down changes at high speed.
Press to set current time as the dual time. You can
then make any changes you want.
The format (12-hour and 24-hour) of the Dual Time
matches the format you select in the Timekeeping
Mode.
Changing the Timekeeping Mode setting causes a corresponding change in the
Dual Time Mode time. If you ever need to change the Timekeeping Mode setting
(say to set the time back three hours when you move from New York to Los
Angeles), you should then make the necessary adjustment to the Dual Time Mode
time (setting it back three hours, in this case).
Seconds
Home time
Hour
Mode indicator
AM indicator
Minutes
C
CC
D
D
D
D
D
D
D
D
D
D
D
B
B
B
B
BA
A
A
A
A

- 4 -
OPERATION CHART : MODULE QW-2286
GENERAL GUIDE
Press to change from mode to mode.
Pressing in any mode illuminates the display for about 3 seconds.
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 the Data Bank Mode or Day Counter Mode, the watch automatically reverts to the normal timekeeping screen.
Timekeeping Mode Data Bank Mode
Press .
Day Counter Mode Alarm Mode Stopwatch Mode Dual Time Mode
TIMEKEEPING MODE
Press to toggle between 12-hour and 24-hour timekeeping.
Seconds
Day of week
PM indicator
Hour
Minutes
Year - Month - Day DST on indicator
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 when you are using 24-hour timekeeping.
To set the time and date
1.While in the Timekeeping Mode, hold down until the
seconds digits flash on the display, indicating the
setting screen.
2.Press to move the flashing in the sequence shown below.
DST
Seconds
Day
Hour
Year
Month Minutes
3.While the seconds setting is selected (flashing), press to reset it to 00. If you
press 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 setting is selected (DST on indicator is flashing), press to
toggle it on (on) and off (OF). If DST setting is on, the DST on indicator is shown
in the Timekeeping Mode, Day Counter Mode and Alarm Mode.
4.While any other setting is selected (flashing), press to increase it or to
decrease it. Holding down either button changes the setting at high speed.
5.After you make the settings you want, press 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.
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.
ABOUT THE BACKLIGHT
Press to illuminate the display for about 3 seconds.
The backlight of this watch employs an electro-luminescent (EL) light, which loses
its illuminating power after very long term use.
Frequent use of the backlight shortens the battery life.
The watch emits an audible sound whenever the display is illuminated. This does
not indicate malfunction of the watch.
The illumination provided by the backlight may be hard to see when viewed under
direct sunlight.
The backlight automatically turns off whenever an alarm sounds.
DATA BANK MODE
The Data Bank Mode lets you store up to 25 records, each with a name (up to eight
characters) and a phone number (up to 12 digits). Data is automatically stored into
alphabetical order based on the name data. You can recall records by scrolling
through them on the display.
Mode indicator
Text area
Number area
Remaining memory
The record on the display when you exit the Data Bank Mode appears first the next
time you enter the Data Bank Mode.
To input a new Data Bank record
1.In the Data Bank Mode, use or until the new data
screen appears.
If the new data screen does not appear when you
press and , it means that memory is full. To
store another record, you will first have to delete a
record stored in memory.
2.Hold down and a cursor appears on the text area.
3.Use or to scroll through characters at the current cursor position. Characters
scroll in the sequence shown below.
A to Z 0 to 9
(Space)
Press .
Press .
Holding down either button scrolls at high speed.
4.When the character you want is at the current cursor position, press to move the
cursor to the right.
5.Repeat the steps 3 and 4 to input the rest of the characters.
You can input up to eight characters for the name, though only three characters
are visible at a time. If the name you input has fewer than eight characters, use
to move the cursor to the eighth space (which means you would press
three times after inputting a five-character name).
Holding down to move the cursor at high speed.
6.After you input the name, use to move the cursor to the number area.
Pressing while the cursor is located at the eighth character of the text area
advances to the number area. Pressing while the cursor is located at the 12th
digit of the number area returns to the text area.
7.Use or to scroll through characters (hyphen, numbers, space) at the current
cursor position on the number area. Characters scroll in the sequence shown
below.
0 to 9 (Space)
Press .
Press .
Holding down either button scrolls characters at high speed.
You can input up to 12 digits for the number.
8.After inputting the name and number of the record, press to store it and exit the
setting screen.
The display can show only three name characters at a time. Longer names scrolls
continuously from right to left. The symbol “ ” indicates that the character to the
left is the last, and the character to the right is the first.
To recall Data Bank data
In the Data Bank Mode, press to scroll forward through the stored data items or
to scroll in reverse.
Holding down either button scrolls at high speed.
To edit Data Bank data items
1.In the Data Bank Mode, use or to display the data you want to edit.
2.Hold down until the cursor appears in the display.
3.Use to move the cursor to the character you want to change.
Holding down to move the cursor at high speed.
4.Use or to change the character.
Holding down either button scrolls characters at high speed.
See step 3 of “To input a new Data Bank record” for information on inputting
name characters, and step 7 for inputting number characters.
5.After making the changes that you want, press to store them and exit the setting
screen.
[ New Data Screen ]
C
C
C
C
C C
C
C
C
C
C
C
D
D
D
D
D
D
D
D
L
L
B
DB
B
DB
B
D
D
B
B
B
A
A
A
A
A
A

- 5 -
To delete a Data Bank record
1.In the Data Bank Mode, use or to display the record you want to delete.
2.Hold down until the cursor appears in the display.
3.Press and at the same time. The message “CLR” appears in the display,
indicating that the record was deleted.
After the record is deleted, the cursor appears in the text area, ready for input.
4.Input a new record or press to exit the setting screen.
DAY COUNTER MODE
The Day Counter Mode lets you count the number of days from the Timekeeping
Mode’s current date to a specific target date.
This watch has five Day Counter records, each of which can be assigned up to 8
characters of text and a target date. Whenever the date specified by a day counter
matches the date of the Timekeeping Mode (regardless of the day counter’s year
setting), the DAYS indicator flashes on the Timekeeping Mode and Dual Time Mode
screen. In the Day Counter Mode, the DAYS indicator flashes on the screen of the
particular day counter whose date matches the date of the Timekeeping Mode.
The initial default date for all Day Counters is January 1, 2001.
Number of days
Year - Month - Day
Target date
Mode indicator
Text
DAYS indicator
Positive count value
indicates a future date,
while a negative value
indicates a past date.
The day counter on the display when you exit the Day Counter Mode appears first
the next time you enter the Day Counter Mode.
Recalling Day Counter Data
In the Day Counter Mode, use and to scroll through the day counters.
To set the target date
1.In the Day Counter Mode, use or to display the day counter you want to set.
2.Hold down until the flashing cursor appears in the text area. This indicates the
input screen.
3.Press to move the flashing in the sequence shown below.
Holding down to move the cursor at high speed.
1st digit
Day
8th digit
YearMonth
Press .
4.While the cursor is in the text area, use or to scroll through characters at the
current cursor position. Characters scroll in the sequence shown below. Holding
down either button scrolls at high speed.
A to Z 0 to 9
(Space)
Press .
Press .
5.While the cursor is in the date area, press to increase the number or to
decrease it. Holding down either button changes at high speed.
To clear a Day Counter record, press and at the same time while the
cursor is in either the text area or number area. The message “CLR” appears on
the display, the characters in the text area are deleted, and today’s date is set as
the target date. After the clear operation is complete, you can create a new record
by changing the date setting.
6.After you make the settings you want, press 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
Alarm on indicator Hourly time signal on indicator
Hour
AM indicator
Minutes
Alarm number
Current time Current time
You can set up to five alarms. When a Daily Alarm is turned on, the alarm sounds for
20 seconds each day when the current Timekeeping Mode time matches the alarm
time setting. Note that the alarm setting has no relation to the Dual Time Mode time.
Press any button to stop the alarm after it starts to sound. When the Hourly Time
Signal is turned on, the watch beeps every hour on the hour.
The alarm on the display when you exit the Alarm Mode appears first the next time
you enter the Alarm Mode.
To set the alarm time
1.In the Alarm Mode, use to display the number of the alarm you want to set.
Alarm 1 Alarm 5Alarm 2 Alarm 3 Alarm 4
: 00 (Hourly Time Signal)
2.Hold down until the hour digits start to flash on the display, indicating the setting
screen.
At this time, the alarm is turned on automatically.
3.Press to move the flashing in the sequence shown below.
Minutes
Hour
4.Press to increase the selected digits and to decrease them. Holding down
either button changes the setting at high speed.
5.After you set the alarm time, press to exit the setting screen.
The format (12-hour and 24-hour) of the alarm time matches the format you select
in the Timekeeping Mode.
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.
To switch a daily Alarm or the Hourly Time Signal on and off
1.In the Alarm Mode, press to select an alarm or the Hourly Time Signal.
2.When the alarm or Hourly Time Signal you want is selected, press to switch it on
and off.
If any alarm is on, the Alarm On indicator is shown on the display when you
change to another mode.
If the Hourly Time Signal is on, the Hourly Time Signal On indicator is shown in
any mode.
To test the alarm
In the Alarm Mode, hold down to sound the alarm.
Holding down to test the alarm also changes the Daily Alarm or Hourly Time
Signal on/off settings.
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 at any time while the stopwatch
is operating.
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.
DUAL TIME MODE
The Dual Time Mode lets you keep track of the time in
another time zone.
To set the dual time
Press to increase the time by 30 minutes or to
decrease by 30 minutes.
Holding down either button changes at high speed.
Press to set current time as the dual time. You can
then make any changes you want.
The format (12-hour and 24-hour) of the Dual Time
matches the format you select in the Timekeeping
Mode.
Changing the Timekeeping Mode setting causes a corresponding change in the
Dual Time Mode time. If you ever need to change the Timekeeping Mode setting
(say to set the time back three hours when you move from New York to Los
Angeles), you should then make the necessary adjustment to the Dual Time Mode
time (setting it back three hours, in this case).
Seconds
Home time
Hour
Mode indicator
AM indicator
Minutes
Mode indicator
1/100 second
Minutes
Seconds
Hours
C
CC
D
D
D
D
D
D
D
D
D
D
D
L
BB
B
B
B
B
B
B
B
B
B
B
A
A
A
A
A
A
A

- 6 -
3. DRAWINGS : QW-2285 / 2286
3-1. BLOCK DIAGRAM
T1
AC
BD2
VDD
XTB
Xtal
CT XT
N1
N2
N3
N4
C4
BAT
KI4
KI3
KI8
KI5
KI6
KI7
KC4
KC3
KC2
KC1
KI2
KI1
BD1
LL1
LD
EL
FRONT
BACK
R
VSS2
LC1~LC5 L8~L48 L49~L52L1~L7
VCH VSS1 VSS3
LSI
TOTAL
BONDING 87PINS
80PINS
VC VCC
PZ
Tr
C1
C5+
C2
C6
C3
V
C7
+
S4
S3
SA
S2
S1
LCD
11
1
3
3
1
2
1. No bonding.
2. KC2-KI5 : QW-2285 : Short (Soldering).
QW-2286 : Open (No soldering).
3. KC3-KI5 : Open (No soldering).
Tr3
TE
PE
PF
TB Tr2Tns1
SE
SF
SEG. COM.
LC1 LC2 LC3 LC4 LC5
L 8
X2Y0 X2Y4
X3Y0
COL1
e7
f7
b7
f6
b6
b8
e6
g8
f8 f0
a9
b9
g9
X1Y4
a11
DASH
X3Y4
X0Y4
b11
a10
b10
f10
c0
d0
e0
c1
X1Y2
X2Y2
X3Y2
X0Y2
X1Y0
X0Y0
SIG
HYP
e11
d11
a7
d10
a6
a8
a0
a1
f1
b2
X1Y1
X2Y1
X3Y1
X1Y3
X2Y3
X3Y3
X0Y1
DST
d7
g7
c7
g6
c6
c8
d6
d8
e8
h8
c9
d9
b0
g0
b1
g1
e1 d1
X0Y3
ALM
f11
g11
c11
g10
c10 DAYS
e10
X7Y5
X8Y5
X9Y5
X11Y5
X12Y5
X16Y0
X10Y5
X15Y0
c4
e3
d5
c5
X15Y4
b4
a4
f4
f5
PM
X16Y2 X16Y4
a5
X15Y2
X7Y6
X8Y6
X9Y6
X11Y6
X12Y6
d4
e5
X16Y1
X10Y6
X15Y1 X15Y3
COL0
g4
e4
g5
AM
X16Y3
b5
X14Y0
X13Y0
X12Y0
X10Y0
X9Y0
X8Y0
X11Y0
X7Y0
X13Y4
X14Y4
X10Y4
X11Y4
X7Y4
X14Y2
X13Y2
X12Y2
X10Y2
X9Y2
X8Y2 X8Y4
X11Y2
X7Y2
X14Y1
X13Y1
X12Y1
X10Y1
X9Y1
X12Y4
X9Y4
X8Y1
X11Y1
X7Y1 X7Y3
X14Y3
X13Y3
X12Y3
X10Y3
X9Y3
X8Y3
X11Y3
X6Y0
X5Y0
X4Y0
(w3c)
(w6c)
X5Y4
X6Y4
(w0c)
(w9c)
X6Y2
X5Y2
X4Y2
(w2c)
(w12) (w10)
(w7c)
X6Y1
X5Y1
X4Y1
(w4c)
X4Y4
(w14)
(w5c)
X6Y3
X5Y3
X4Y3
(w1c)
(w13)
(w11)
(w8c)
L 9
L 10
L 11
L 12
L 13
L 14
L 15
L 16
L 17
L 18
L 19
L 20
L 21
L 22
L 23
L 24
L 25
L 26
L 27
(w9a)
(w4a)
(w2b) (w9b)
(w5a)
(w5b)
(w0a)
(w7a)
(w2a)
(w0b)
(w4b)
(w7b)
(w8a)
(w3a) (w6a)
(w1a)
(w1b)
(w3b) (w8b)
(w6b)
L 3
L 4
L 5
L 6
L 7
L 28
L 29
L 30
L 31
L 32
L 33
L 34
L 35
L 36
L 37
L 38
L 39
L 40
L 41
L 42
L 43
L 44
L 45
L 46
L 47
f9
X5Y5
X6Y5
X4Y5 c3
d2
a2
a3
f3
f2
e9
X5Y6
X6Y6
c2
d3
X4Y6 g2
b3
g3
e2
L 49
L 50
L 51
L 52
L 48
d0
g0
a0
c0 b0
f0
e0
d1
g1
a1
c1 b1
f1
e1
d6
g6
a6
c6 b6
f6
e6
d7
g7
a7
c7 b7
f7
e7
d8
g8
h8 a8
c8 b8
f8
e8
d9
g9
a9
c9 b9
f9
e9
d10
g10
a10
c10 b10
f10
e10
d11
g11
a11
c11 b11
f11
e11
DAYS
Y6
X0 X16
Y0
L8
L9
L10
L11
L12
L13
L14
L15
L16
L17
L18
L19
L20
L21
L22
L23
L24
L25
LC1
LC2
LC3
LC4
LC5
L48
L47
L46
L45
L44
L43
L42
L41
L40
L39
L38
L37
L36
L35
L34
L33
L32
L31
L30
L29
L28
L27
L26
PM
DASH
AM
COL0
COL1
HYP
DST
SIG
ALM
d4
g4
a4
c4 b4
f4
e4
d3
g3
a3
c3 b3
f3
e3
d2
g2
a2
c2 b2
f2
e2
d5
g5
a5
c5 b5
f5
e5

- 7 -
3-2. CHECKING TERMINALS AND COMPONENTS : QW-2285 / 2286
Top view of P.C.B. ass'y Bottom view of P.C.B. ass'y
KI8 KI8
KI1
KI1
KI3
KI3
KI4
KI4
VDD
VSS2
VSS2
VSS2
VSS2
VSS2
LD
BD1
L
VDD
L
L
L VDD
VDD
VDD
VCC
VDD
VDD
VC
VC
VCH
VCH
VDD
VDD TE
TE
TE
SF
SF
SE
SF
PE PE
TE
VSS2
VSS1
VSS3
AC
VDD
VDD
XT
XT XTB
KI2 KI2
KI7 KI7
KC3
KC2
N3
N2
N1
N4 VDD
VDD
VDD
VDD
VDD
SE
KI5
KI5
SF(TB)
PF(VDD)
3a .PCB ass'y
(7640 4221)
3b .PCB ass'y
(7640 4222)
Resistor / Chip
R
Transistor
Tr
Transistor
Tr2
Transistor
Tr3
Transfurmer
Tns1
Capacitor / Tantalum
C5
Capacitor / Tantalum
C7
Capacitor / Chip
C4
4 .Capacitor / Trimmer
(7103 0458)
CT
7 .Cushion 506
(7211 9631)
8 .Cushion 6
(7211 0064)
Xtal
5 .Oscillator / Crystal
(7110 1263)
C1
Capacitor / Chip
C3
Capacitor / Chip
C2
Capacitor / Chip
C6
Capacitor / Chip
LL1
Coil

- 8 -
14 (7230 0980)
12 (7230 0616)
9 (7010 4674)
3a (7640 4221)
3b (7640 4222)
PCB ass'y
2a(1002 4517)
2b(7020 6090)
2c(1002 4507)
2d(1002 4508)
2e(7020 6092)
13 (7230 0511)
Battery / Lithium (CR1616)
1a(1003 9541)
1b(1003 9543)
1c(1003 9544)
1d(1003 9520)
11 (7233 2736)
4. EXPLODED VIEW : QW-2285 / 2286
6 (1002 7903)
10 (7424 3212)

- 9 -
5. PARTS LIST : QW-2285 / 2286
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 Bulkpackonthe tray will be supplied from our OverseasSpare Parts Section under charge basis.
Batteries in Brister pack will be supplied from our Sales Department.
4. As for order/supply of spare parts, refer to the separate publication “GUIDEBOOK for spare parts supply”.
Notes: Q – Used quantity
R – Rank
Item Code No. Parts name Specification Applicable Q R
7640 4260 MODULE/WITHOUT MOVEMENT QW-2285AT-09TK BG-153-1BV/2AV / 1 A
BG-153B-2AV/2BV
7640 4261 MODULE/WITHOUT MOVEMENT QW-2285AT-11TK BG-153B-4V 1 A
7640 4262 MODULE/WITHOUT MOVEMENT QW-2285AT-12TK BG-153B-6V 1 A
7640 4263 MODULE/WITHOUT MOVEMENT QW-2286AT-02TK BG-154-2V 1 A
7640 4264 MODULE/WITHOUT MOVEMENT QW-2286AT-03TK BG-154-6V 1 A
7640 4265 MODULE/WITHOUT MOVEMENT QW-2286AT-04TK BG-154-3V 1 A
7640 4266 MODULE/WITHOUT MOVEMENT QW-2286AT-07TK BG-154-4V 1 A
1a 1003 9541 LCD C2285-02P QW-2285AT-09 1 A
1b 1003 9543 LCD C2285-04P QW-2285AT-11 1 A
1c 1003 9544 LCD C2285-05P QW-2285AT-12 1 A
1d 1003 9520 LCD C2285-01P QW-2286AT-02/03/04/07 1 A
2a 1002 4517 EL YEL-1951-A-91 QW-2285AT-09/11/12 1 A
2b 7020 6090 EL YEL-1951-A-03 QW-2286AT-02 1 A
2c 1002 4507 EL YEL-1951-A-13 QW-2286AT-03 1 A
2d 1002 4508 EL YEL-1951-A-33 QW-2286AT-04 1 A
2e 7020 6092 EL YEL-1951-A-63 QW-2286AT-07 1 A
3a 7640 4221 PCB ASS'Y Q254918*1TK QW-2285AT Common 1 A
3b 7640 4222 PCB ASS'Y Q254918*2TK QW-2286AT Common 1 A
4 7103 0458 CAPACITOR/TRIMMER TSF-2L2-120-4.2 QW-2285AT / 2286AT Common 1 B
5 7110 1263 OSCILLATOR/CRYSTAL DT-26S07 QW-2285AT / 2287AT Common 1 B
6 1002 7903 CONTACT/BATTERY (-) 156 Q39603B-1 QW-2285AT / 2288AT Common 1 C
7 7211 9631 CUSHION/506 Q49364-1 QW-2285AT / 2289AT Common 1 C
8 7211 0064 CUSHION/6 Q4914-1 QW-2285AT / 2290AT Common 1 C
9 7010 4674 INTERCONNECTOR/1951 Q463662-1 QW-2285AT / 2291AT Common 2 C
10 7424 3212 LABEL/1995 Q463482-1 QW-2285AT / 2292AT Common 1 C
11 7233 2736 SPACER/1951-1 Q463659A-1 QW-2285AT / 2293AT Common 1 C
12 7230 0616 SPRING/COIL 1199-1 Q437728B-1 QW-2285AT / 2294AT Common 2 B
13 7230 0511 SPRING/COIL 1253-2 Q439219-1 QW-2285AT / 2295AT Common 1 B
14 7230 0980 SPRING/COIL 1514 Q456768-1 QW-2285AT / 2296AT Common 1 B
BATTERY/LITHIUM CR1616 QW-2285AT / 2297AT Common 1
* For the price, new parts and minimum quantity of the above parts, please refer to the Parts Price List P.P.L.-566.

- 10 -
6. PRECAUTIONS FOR REPAIR : QW-2285 / 2286
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 positive (+) side of the battery or main plate with the metallic tweezers.
The contact should be made for about two seconds.
For 2 seconds after the AC operation, do not make any button operations on these modules.
2.On removing of the module from the case, please insert the precision screw driver between the module
and the case pointed by arrows.
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 the A and C buttons, at the normal time keepingmode.
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 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-2285 QW-2286
Metallic tweezers

Nishi
-
Shinjuku Kimuraya Bldg. 1F
5-25, Nishi-Shinjuku 7-Chome
Shinjuku
-
ku
,
Tokyo 160-0023
,
Japan
Printed in Japan
Overseas Service Division
CASIO TECHNO CO.,LTD.
EI0100611A
This manual suits for next models
3
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