Casio QW-2516 User manual

(WITHOUT PRICE)
SERVICE MANUAL
& PARTS LIST
REF. NO. S/M-769
APRIL 2002
QW-2516
MODULE NO.
R
BGR-250V

- 1 -
CONTENTS
1. SPECIFICATIONS : QW-2516
1. SPECIFICATIONS • • • • • • • • • • • • • • • • • • • • • • • • • • 1
2. OPERATION CHART • • • • • • • • • • • • • • • • • • • • • • • • 2
3. DRAWINGS • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 4
3-1. BLOCK DIAGRAM • • • • • • • • • • • • • • • • • • • • • • • • 4
3-2. CHECKING TERMINALS AND COMPONENTS• • • • 5
4. EXPLODED VIEW • • • • • • • • • • • • • • • • • • • • • • • • • • 6
5. PARTS LIST • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 7
6. PRECAUTIONS FOR REPAIR • • • • • • • • • • • • • • • • • • 8
6-1. AC (ALL CLEAR) AND REMOVING OF MODULE • • 8
6-2. ACCURACY CHECKING • • • • • • • • • • • • • • • • • • • 8
Item Detail Item Detail
Battery CR1616 Accuracy ±15sec./month
Battery life Approx. 24 months Accuracy setting system Trimmer capacitor
Current consumption 1.2 µA maximum Accuracy checking See page 8
Alarm system Piezo plate on Back cover Accuracy setting +0.25~+0.35sec./day
Function
• Shock resistant
• Electro-luminescent backlight
Afterglow
• Memory
Memory capacity: Up to 20 sets of data, each set including; Name (8 characters) and telephone
number (12 digits)
• World time
27 time zones (40 cities), city code display, daylight saving on/off
• Day Counter
Automatically counts down the days from the current date to a target date.
Memory capacity: 5 records (8 characters each)
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
• Daily alarm
• Hourly time signal
• Auto-calendar (to year 2039)
• 12/24-hour format 
• Regular timekeeping: Hour, minutes, seconds, am/pm, month, date, day

- 2 -
2. OPERATION CHART : MODULE QW-2516
• If you do not perform any operation for a few minutes in the Day Counter
Mode or Telememo Mode, the watch automatically reverts to the normal
timekeeping screen.
General Guide
• Press to change from mode to mode.
• Pressing in any mode illuminates the display.
• 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.
Day Counter Mode Telememo Mode Stopwatch Mode Alarm ModeWorld Time ModeTimekeeping Mode
Press .
Timekeeping Mode
• Press to toggle the display between the day of the week and month, as
shown below.
.
Hour
Minutes
City code
Seconds
DST on indicator
Day
Month
Day of week
Press .
• Press to toggle between 12-hour and 24-hour formats.
• With 12-hour format, times between midnight and noon are indicated by
(am), while times between noon and midnight are indicated by (pm).
• The and indicators do not appear when you are using 24-hour format.
To set the time and date
1.While in the Timekeeping Mode, hold down until the secondís digits flash
on the display, which indicates the setting screen.
2.Press to move the flashing in the sequence shown below.
DST
Seconds
Month
Day
City code
Minutes
Year
Hour
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 ( ) and off ( ).
• The DST on/off setting you make for the Timekeeping Mode does not
affect the World Time Mode.
• While the city codes setting is selected, use to scroll through the
available codes until the one you want to use as your home time city is
displayed.
• For full information on city codes, see the “City Code Table” at the back of
this manual.
4.While any other setting is selected (flashing), press to increase it.
Holding down changes the setting at high speed.
5.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.
Backlight Precautions
The backlight uses an EL (electro-luminescent) panel that causes the entire
display to glow for easy reading in the dark.
In any mode, press to illuminate the display for about three seconds.
• The electro-luminescent panel that provides illumination loses power after
very long use.
• The illumination provided by the backlight may be hard to see when viewed
under direct sunlight.
• The watch may emit an audible sound whenever the display is illuminated.
This is due to vibration of the EL panel used for illumination, and does not
indicate malfunction.
• The backlight automatically turns off whenever an alarm sounds.
• Frequent use of the backlight shortens the battery life.
World Time Mode
Hour : Minutes Seconds
Day
Day of week
Mode indicator
City code
Month
[Month-day display]
DST on indicator
The World Time Mode shows the current time in 40 cities (27 time zones)
around the world. The lower part of the display shows either the day of the
week and day, or the month and day. The format used is the one you select in
the Timekeeping Mode before entering the World Time Mode.
• For full information on city codes, see the “City Code Table” at the back of
this manual.
• The time setting of the Timekeeping Mode and the World Time Mode are
synchronized, except for the Daylight Saving Time (summer time) setting.
Whenever you change the time setting for any city in the Timekeeping Mode,
the settings of all World Time cities are changed accordingly.
• The World Time Mode has its own Daylight Saving Time (summer time)
setting.
To select a World Time City and view its time
In the World Time Mode, press to scroll through city codes (time zones) to
the east or to scroll to the west. Holding down or scrolls at high
speed.
• You can set up an alarm in the Alarm Mode so it operates based on the
current time in a city you specify in the World Time Mode.
Daylight Saving Time (DST)
Daylight Saving Time automatically advances the time setting by one hour from
Standard Time. You cannot make individual Daylight Saving Time settings for
each city code (time zone). Turning on Daylight Saving Time affects all World
Time time zones. Remember that not all countries or even local areas use
Daylight Saving Time.
To switch between Standard Time and Daylight Saving Time
In the World Time Mode, hold down to toggle between Daylight Saving
Time and Standard Time.
DST OFF DST ON
Hold down .
DST on indicator
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 counters. You can assign text titles up to eight
characters long to each of the five Day Counters. Whenever the date specified
by any one of the day counters matches the date of the Timekeeping Mode
(regardless of the day counter’s year setting), the DAYS indicator flashes on
the Timekeeping Mode. 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.
Year Month - Day
Target date Numbers of days
Text DAYS indicator
Mode indicator
Alternate at
the 1-second
interval.
• 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 (+) and (–) to scroll through 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.
1st digit
Day
8th digit
YearMonth
Press .
C
C
C
C
C
D
D
D
D
D
D
D
D
D
D
D
L
L
L
B B
B
DB
B
B
A
A
A
A
CD
L
BB
A
CD
L
B
A
C
C
D
L
B
A
CD
B
AA
A

- 3 -
Telememo Mode
The Telememo Mode lets you store up to 20 records,
each with a name (up to eight characters) and a
phone number (up to 12 digits). You can recall
records by scrolling through them on the display.
• The page number on the display when you exit the
Telememo Mode appears first the next time you
enter the Telememo Mode.
To input a new Telememo record
1.In the Telememo Mode, use (+) and (–) to
scroll through the Telememo records and display
the one you want to input data.
2.Hold down and a cursor appears on the name
area.
3.Use to scroll through characters at the current cursor position.
Characters scroll in the sequence shown below.
(Space) A to Z 0 to 9 . (Period) -(Hyphen)
Press .
• Holding down scrolls at high speed.
4.When the character you want is at the current cursor position, press to
move the cursor to the right.
1st digit 8th digit
12th digit 1st digit
Name area
Number area
Press .
Mode indicator
Page number
Name area
Number
area
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).
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 name
area advances to the number area. Pressing while the cursor is located
at the 12th digit of the number area returns to the name area.
7.Use to scroll through characters (hyphen, numbers, space) at the current
cursor position on the number area. Characters scroll in the sequence
shown below.
Press . (Space)
0 to 9-(Hyphen)
• Holding down scrolls characters at high speed.
8.When the character you want is at the cursor position, press to move the
cursor to the right.
9.Repeat steps 7 and 8 to input the rest of the numbers you want.
• You can input up to 12 digits for the number.
10. 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.
• The number area can show up to six digits at one time. If a number has more
than six digits, the display automatically switched between the first six digits
(counting forward from the first digit) and the last six digits (counting
backward from the last digit) of the number. This means that if a number is 12
digits long, the number area switches between the first six digits and the last
six digits. If a number is seven digits long, the number area switches between
digits 1 through 6, and 2 through 7.
To recall Telememo data
In the Telememo Mode, use (+) and (–) to scroll through Telememo
records on the display.
• Holding down or scrolls at high speed.
To edit Telememo data items
1.
In the Telememo Mode, scroll through the records and display the one 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.
4.Use to change the character.
• See step 3 of “To input a new Telememo 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 Telememo record
1.
In the Telememo Mode, scroll through the records and display the one you want
to delete.
2.Hold down until the cursor appears in the display.
3.Press and at the same time. The message “ ” appears in the
display, indicating that the record was deleted.
• After the record is deleted, the cursor appears in the name area, ready for input.
4.Input a new record or press to exit the setting screen.
Stopwatch Mode
The stopwatch lets you measure elapsed time, split
times, and two finishes.
• The display range of the stopwatch is 23 hours,
59 minutes, 59.99 seconds.
• The stopwatch continues to run, restarting from
zero after it reaches its limit, until you stop it.
• The stopwatch measurement operation continues
even if you exit the Stopwatch Mode.
• Exiting the Stopwatch Mode while a split time is
frozen on the display clears the split time and
returns to elapsed time measurement.
• All of the operations in this section are performed in
the Stopwatch Mode, which you enter by pressing
.
Mode indicator
Hours : Minutes
Seconds
1/100 second
Elapsed time measurement
Stop Re-start Stop Clear
Start
Start
Split
(SPL displayed)
Split release Stop Clear
Start Split Stop Split release Clear
Split time measurement
Split time and 1st-2nd place times
First runner
finishes.
Display time of
first runner.
Second runner
finishes. Display time of second runner.
Alarm Mode
When the Daily Alarm is turned on, the alarm sounds
for 20 seconds at the preset time each day. 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.
• You can also specify a time zone for the Daily
Alarm. The alarm sounds when the alarm time
matches the current time in the time zone you
specify.
• The Hourly Time Signal also sounds in accordance
with the time zone you specify.
• If the DST on indicator is on the display in the
Alarm Mode, it means that Daylight Saving Time
(summer time) is turned on for the time zone whose
alarm you are setting.
Mode indicator
Hour : Minutes
Alarm on indicator
Hourly time signal on
indicator
Time zone
To set the alarm time
1.While in the Alarm Mode, hold down until the city code flashes on the
display, which indicates the setting screen.
• At this time, the alarm is turned on automatically.
2.Press to move the flashing in the sequence shown below.
Time zone Hour Minutes
3.While the time zone is flashing, press to toggle between the city codes
which you selected in the Timekeeping Mode and the one you selected in
the World Time Mode.
4.While the hour or minuteís digits of the alarm time are flashing, press to
increase them. Holding down changes the setting at high speed.
5.After you make the settings you want, 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 ( displayed) or afternoon ( displayed).
• Changing the home time city or the World Time city after setting an alarm
causes the time zone in the Alarm Mode to change as well.
To stop the alarm
Press any button to stop the alarm after it starts to sound.
To turn the Daily Alarm or 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.
4.While the cursor is in the text area, use to scroll through characters at
the current cursor position. Characters scroll in the sequence shown below.
Holding down scrolls at high speed.
Press .
(Space) A to Z 0 to 9 . (Period) -(Hyphen)
5.While the cursor is in the date area, press to scroll through digits at the
current cursor position. Holding down scrolls at high speed.
• Press and at the same time, and the message “ ” appears in the
display. The characters in the text area are cleared and today’s date is set
as the target date. You can then make any changes in the date you want.
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.
• The text area display can show only three characters at a time. Longer text
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 first.
C
C
C
CCC
CC
C
C
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
B
B
B
B
B
B
A
A
A
A
A
A
A
A
A
C
CD
D
D
L
B
A
D D
A A A
D D DD A
D D
A A A
CD
L
B
A
CD
L
B
A

- 4 -
3. DRAWINGS : QW-2516
3-1. BLOCK DIAGRAM
LC4
L26 L48 L47 L46 L45 L44 L43 L42
L41
L40
L39 L38 L37 L36 L35 L34 L33 L32
L31
L30
L29 L28 L27
LC5
L 8 L 9
L10 L11 L12 L13 L14 L15 L16 L17 L18 L19 L20 L21 L22 L23 L24 L25
LC1 LC2 LC3
HYP
ALM
a0
b0
c0
d0
e0 f0
g0
a4
b4
c4
d4
e4 f4
g4
a5
b5
c5
d5
e5 f5
g5
a6
b6
c6
d6
e6 f6
g6
a7
b7
c7
d7
e7 f7
g7
a8
b8
c8
d8
e8 f8
g8
a9
b9
c9
d9
e9 f9
g9
a1
b1
c1
d1
e1 f1
g1
a2
h2
b2
c2
d2
e2 f2
g2
a3
hi3
b3
c3
d3
e3 f3
g3
SIG
DSTDAYS
AM
PM
COL
Y5
Y4
Y1
X16
Y0
Y6
Y3
Y2
X0
K5
K0
K3
K1
K2
K4
SEG. COM.
LC1 LC2 LC3 LC4 LC5
L 8 X1Y3
X2Y3
X3Y3
X0Y3
X4Y3
X5Y3
X6Y3
X7Y3
X8Y3
X16Y1
X15Y1 a4
X10Y3
X11Y3
X12Y3
X9Y3
X13Y3
X14Y3
X15Y3
X16Y3
X13Y1
X12Y1
X11Y1
X14Y1
X10Y1
X9Y1
X8Y1
X7Y1
X2Y1
X1Y1
X0Y1
X6Y1
g3 a0
c3 d3
g2 c2
HYP a1
e2 d2
hi3 e3
X1Y2
X2Y2
X7Y2
X6Y2
X5Y2
K3
X3Y2
X0Y2
K4
X10Y2
K5
X12Y2
X9Y2
X13Y2
X14Y2
X15Y2
X16Y2
X1Y5
X2Y5
X3Y5
X0Y5
X4Y5
X5Y5
X6Y5
X7Y5
X8Y5
X10Y5
X11Y5
X12Y5
X9Y5
X13Y5
X14Y5
X15Y5
X16Y5
c4
X1Y4
X2Y4
X3Y4
X0Y4
X4Y4
X5Y4
X6Y4
X7Y4
X8Y4
X10Y4
X11Y4
X12Y4
X9Y4
X13Y4
X14Y4
X15Y4
X16Y4
b4 g4
PM
X4Y6
d4
X5Y6
X6Y6
X7Y6
X8Y6
X10Y6
X11Y6
X12Y6
X9Y6
ALMc4f4 SIG
f5
K0
e5
DAYSb5DST
b1
g1 d1 b2
f1
c5
c6K2 b6
d5a5X12Y0
X11Y0 X11Y2
X10Y0
X9Y0
X8Y0 X8Y2
X7Y0
X6Y0
g5
e6
K1 b7 c7
d7g7a7
a9
d6a6 g6
a3b0 c0
g0 d0
f0 e0 b3 h2
a2c1
f3
f2e1
X4Y1 X4Y0 COL
a8 f8
X4Y2c8 e7
e9AM b9 d9g9
f7
f9
X5Y0X5Y1
b8 d8X3Y1 g8 c9e8
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
f6
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
L 48
LSI
TOTAL 87PINS
BONDING 80PINS
VSS2
BAT
KI7
KI6
KI4
KI3
KI2
VCH VSS3 VC VCC
C1
C3C4
XTB
N2
Xtal
LC1 - - - - LC5 L8 - - - L48
CT
LCD
C6
EL
LD
N1
KI1
KI5
S4
S3
S2
VSS1
C2
BD1
C5
LL1
Tr
N3
XT
+
BACK
FRONT
N4
KC2
KC3
KC4
KC1
VDD
AC
T1
BD2
S1
VPZ
L49 - - - L52L1 - - - L7
PE
PF
SE
SF
C7
+R
Tr2
TB
TE
Tns1
Tr3
SA
KI8
1 1
1
1
1. No bonding.

- 5 -
3-2. CHECKING TERMINALS AND COMPONENTS : QW-2516
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)
3 .PCB ass'y
(7640 5308)
Resistor / Chip
R
Transistor
Tr
Transistor
Tr2
Transistor
Tr3
Transfurmer
Tns1
Capacitor / Tantalum
C5
Capacitor / Tantalum
C7
Capacitor / Chip
C4
4 .Capacitor / Trimmer
(1001 0950)
CT
7 .Cushion 506 
(7211 9631)

8 .Cushion 6 
(7211 0064)

Xtal
5 .Oscillator / Crystal 
(7110 6316)
C1
Capacitor / Chip
C3
Capacitor / Chip
C2
Capacitor / Chip
C6
Capacitor / Chip
LL1
Coil

- 6 -
14 (7230 0980)
13 (7230 0616)
9 (7010 4674)
3 (7640 5308)
PCB ass'y
2a(7020 6090)
2b(1001 3459)
2c(7020 6092)
2d(7020 6144)
2e(1002 4508)
2f (1002 4507)
12 (7230 0378)
Battery / Lithium (CR1616)
1 (1007 6114)
11a (1007 6113)
11b (1007 6115)
11c (1007 6116)
11d (1007 6117)
4. EXPLODED VIEW : QW-2516
6 (1002 7903)
10 (7424 3212)

- 7 -
5. PARTS LIST : QW-2516
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 5346 MODULE/WITHOUT MOVEMENT QW-2516AT-01TK BGR-250-2V 1 A
7640 5347 MODULE/WITHOUT MOVEMENT QW-2516AT-02TK BGR-250V-2V 1 A
7640 5348 MODULE/WITHOUT MOVEMENT QW-2516AT-03TK BGR-250-4AV 1 A
7640 5349 MODULE/WITHOUT MOVEMENT QW-2516AT-04TK BGR-250-4BV 1 A
7640 5350 MODULE/WITHOUT MOVEMENT QW-2516AT-05TK BGR-250-3V 1 A
7640 5351 MODULE/WITHOUT MOVEMENT QW-2516AT-06TK BGR-250V-6V 1 A
7640 5352 MODULE/WITHOUT MOVEMENT QW-2516AT-07TK BGR-250V-4V 1 A
7640 5353 MODULE/WITHOUT MOVEMENT QW-2516AT-08TK BGR-250V-3V 1 A
1 1007 6114 LCD S2516-01THP QW-2516AT Common 1 A
2a 7020 6090 EL YEL-1951-A-03 QW-2516AT-01TK 1 A
2b 1001 3459 EL YEL-1951-A-01 QW-2516AT-02TK 1 A
2c 7020 6092 EL YEL-1951-A-63 QW-2516AT-03TK/07TK 1 A
2d 7020 6144 EL YEL-1951-A-53 QW-2516AT-04TK 1 A
2e 1002 4508 EL YEL-1951-A-33 QW-2516AT-05TK/08TK 1 A
2f 1002 4507 EL YEL-1951-A-13 QW-2516AT-06TK 1 A
3 7640 5308 PCB ASS'Y Q255515*1TK QW-2516AT Common 1 A
4 1001 0950 CAPACITOR/TRIMMER CTZ2E-30C-W2-P QW-2516AT Common 1 B
5 7110 6316 OSCILLATOR/CRYSTAL DT-26S12 QW-2516AT Common 1 B
6 1002 7903 CONTACT/BATTERY(-) 156 Q39603B-1 QW-2516AT Common 1 C
7 7211 9631 CUSHION 506 Q49364-1 QW-2516AT Common 1 C
8 7211 0064 CUSHION 6 Q4914-1 QW-2516AT Common 1 C
9 7010 4674 INTERCONNECTOR Q463662-1 QW-2516AT Common 2 C
10 7424 3212 LABEL 1995 Q463482-1 QW-2516AT Common 1 C
11a 1007 6113 SPACER/PRINT Q469339A-1 QW-2516AT-01TK/05TK 1 C
11b 1007 6115 SPACER/PRINT Q469340A-1 QW-2516AT-02TK/06TK/08TK 1 C
11c 1007 6116 SPACER/PRINT Q469339A-2 QW-2516AT-03TK/04TK 1 C
11d 1007 6117 SPACER/PRINT Q469340A-2 QW-2516AT-07TK 1 C
12 7230 0378 SPRING/COIL 1160-1 Q436634-1 QW-2516AT Common 1 B
13 7230 0616 SPRING/COIL 1199-1 Q437728B-1 QW-2516AT Common 2 B
14 7230 0980 SPRING/COIL 1514 Q456768-1 QW-2516AT Common 1 B
7111 1059 BATTERY/LITHIUM CR1616 QW-2516AT Common 1
* For the price, new parts and minimum quantity of the above parts, please refer to the Parts Price List P.P.L.-580.

- 8 -
6. PRECAUTIONS FOR REPAIR : QW-2516
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 C button, press the A and B 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 C 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.
Metallic tweezers
CD
L
B
A

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