Casio QW-2983 User manual

SERVICE MANUAL
& PARTS LIST
(WITHOUT PRICE)
QW-2983
MODULE NO.
R
REF. NO. S/M-976
NOV. 2006
BGT-2601JBGT-2600J

CONTENTS
Page
1. SPECIFICATIONS: MODULE QW-2983 .................................................... 1
2. DRAWINGS: MODULE QW-2983
2-1. LCD DIAGRAM .............................................................................................2
2-2. CHECKING TERMINALS AND COMPONENTS ..........................................3
3. EXPLODED VIEW: MODULE QW-2983 .................................................... 4
4. PARTS LIST: MODULE QW-2983 ............................................................. 5
5. PRECAUTIONS FOR REPAIR: MODULE QW-2983
5-1. AC (ALL CLEAR) AND REMOVING OF MODULE ......................................6
5-2. ACCURACY CHECKING ..............................................................................6
5-3. SOLAR CELL-PCB ASS'Y CONTACT CHECKING.....................................7
5-4. TIME CALIBRATION SIGNAL TEST MODE ................................................7
6. TROUBLESHOOTING FOR TIME RECEPTION:
MODULE QW-2983 .................................................................................... 8

— 1 —
1. SPECIFICATIONS: MODULE QW-2983
Battery CTL1616 (Storage battery)
Note: Use CTL1616 only. Other storage battery or CR1616 can cause
damage to the watch.
Battery life Approx. 11 months
Current consumption 1.01 µA maximum
Alarm system Piezo plate on Cover/Back
Accuracy ±15 sec./month
Accuracy setting system Trimmer capacitor
Accuracy checking See page 6
Functions • Electro-luminescent backlight
Aferglow
• Solar powered
• Battery power indicator
• Power Saving (Turns off the display when the watch is left in the dark)
• Time calibration signal reception
Auto receive
Manual receive
Last date/time received display
• ReceivableTime Calibration Signals
Fort Collins, Colorado (Call Sign: WWVB, Frequency: 60kHz)
Fukushima, Japan (Call Sign: JJY, Frequency: 40kHz)
Fukuoka/Saga, Japan (Call Sign: JJY, Frequency: 60kHz)
• World Time
29 time zones (48 cities), daylight saving time on/off
• 1/100-sec.stopwatch
Measuring capacity: 59'59.99"
Measuring modes: Elapsed time, split time, 1st-2nd place times
• Daily alarms
5 independent daily alarms(4 one-time alarms and 1 snooze alarm)
• Hourly alarms
• Auto-calendar (to year 2039)
• 12/24-hr format
• Regular timekeeping:
hr, min, sec, pm, month, date, day
• Countdown timer
Measuring unit: 1/10 second
Countdown range: 60 minutes
Countdown start time setting range: 1 to 60 minutes (1-minutes increments)
Item Detail

—2 —
L28
L 3
L 4
L 5
L 6
L 7
L 8
L 2
L 1 g1
g2
CHARGE
L29 PSAVE
COM
SEG COM SEG
c3
g4
e4
g3
e2
L 9 c5
L10 g5
L11 x16y2
L12 x15y2
L13 x14y2
L14 x13y2
L15 x12y2
L16 x11y2
L17 x10y2
SEG COM L30
c1 f1
b2
b3
b4
f4
f3
f2
b5
f5
x16y1
x15y1
x14y1
x13y1
x12y1
x11y1
x10y1
b1 a1
sec
a3
min
a4
col hyp
a2
a5
PM
x16y0
x15y0
x14y0
x13y0
x12y0
x11y0
x10y0
MUTE RECOVER
anta0
anta2
SNZ
anta1
ALM
SIG
x16y4
x15y4
x14y4
x13y4
x12y4
x11y4
x10y4
LOW e1
c2
d3
c4
d4
e3
d5
e5
x16y3
x15y3
x14y3
x13y3
x12y3
x11y3
x10y3
d1
LC1 LC2 LC3 LC4 LC5 LC2 LC3 LC4 LC5LC1
d2
L19 x8y2
L20 x7y2 x8y1 x7y1 x8y0 x7y0 x8y4 x7y4 x8y3 x7y3
L23
L24
L25
L26
L27
L22
L21
L31
L32
L33
L34
x6y2
x4y2
x3y2
x5y2
x2y2
x0y2
e0
x1y2
g0
x6y1
x4y1
x3y1
x5y1
x2y1
x0y1
f0
x1y1
b0
x6y0
x4y0
x3y0
x5y0
x2y0
x0y0
DST
x1y0
a0
x6y4
x4y4
x3y4
x5y4
x2y4
x0y4
MID
x1y4
HIGH
x6y3
x4y3
x3y3
x5y3
x2y3
x0y3
d0
x1y3
c0
L18 x9y2 x9y1 x9y0 x9y4 x9y3
L 1 L 2 L 3 L 4 L 5 L 6 L 7 L 8 L 9 L10 L11 L12 L13 L14 L15 L16 L17 L18 L19 L20 L21 L22 L23 L24 L25 L26 L27 L28 L29 L30
L32 L31 LC3 LC2 LC1 LC4 LC5
x16
HIGHLOW
f1 b1
g1
c1
c5
b5
e5
d5
f5
a5
g5 g4
a4
f4 b4
c4
d4
e4 e3
d3
c3
b3
f3
a3
g3
CHARGE
RECOVER
PSAVE
SIG
e1
hyp
anta1
anta2
anta0
y4
x0
y0
MID
ALM
SNZ
DST
PM
g2
a2
f2 b2
c2
d2
e2
a0
d0
e0 c0
g0 b0f0
sec
d1
a1
col
min
MUTE
2. DRAWINGS: MODULE QW-2983
2-1. LCD DIAGRAM

—3 —
2-2. CHECKING TERMINALS AND COMPONENTS
Short pad for R trimming
Short pad for N trimming
CAPACITOR/TRIMMER
2. PCB ASS'Y
(76409253)
Short pad for switching modules
KI7-GND: Short (Soldering)
KI6-KC3: Open (No Soldering)
KI6-KC1: Open (No Soldering)
TAPE/ADHESIVE 2306
OSCILLATOR/CRYSTAL
CUSHION 466-A
VSC
VDD2
P13 P12
VCC
GND
VDD2
VCH
VCC
P7
VC1
GND
VDD2
P14
KI5 Kl1
Kl4
KI3
VDSP
FET-D P2
VC1VC2
VSC VDD2
LL1
GND
GND Rcp
XT
GND
FET-S P2
P1
VCH
VDSPGND
VDD1
R1
VDD2
GND
XT
GND
Rxt3
Rxt2
P7
P5
GND Rcp
VDD2
P4
Rxt3
VDD3
P7
P5
GND
R1
VDD2
P9
XTB
LL1
SCIN
GND R2
GND R1
CLF2
BD
GND
VC4
R1
VC3
KI9
R3
KI6
N2
SCIN
N1
GND
VHF GND
KI7 GND
SCINSCR
GND
GND
VSC
GND
KI6
GND
GND
L-
L+
GNDB
GND
GND
GND
LL1
CLF2
VOUT
L-
CLF1
LD1
VDD2
L+
GND
LL1 GND
KI8 GND
CLF1
VOUT
KI5
KI3KI4
KI1
VSC
GND
KI8GND
Rxt2
GND
KC3
KC1
K18
K12
AC

—4 —
3. EXPLODED VIEW: MODULE QW-2983
1 (10207640)
8 (10209260)
12 (10209257)
7 (72311777)
15 (72019249)
4 (10168959)
2 (76409253)
PCB ass'y
6 (10209258)
14 (72301045)
9 (10209261)
3 (10065657)
Battery storage (CTL1616)
10 (10065664)
13 (72301036)
5 (72311913)
11 (10123230)

4. PARTS LIST: MODULE QW-2983
QW-2983AT-01TK
1 QW-2983AT-01TK
Note: 1. Prices and s
p
ecifications are sub
j
ect to chan
g
e without
p
rior notice.
2. S
p
are
p
arts are classified as follows accordin
g
to their im
p
ortance in after-sales service.
A Rank ---------------------------------------- Im
p
ortant
C Rank ---------------------------------------
-
Not Im
p
ortant
3. Batteries in Bulk
p
ack on the tra
y
will be su
pp
lied from our Overseas S
p
are Parts Section under char
g
e ba
s
Batteries in Blister
p
ack will be su
pp
lied from our Sales De
p
artment.
4. As for order/su
pp
l
y
of s
p
are
p
arts, refer to the se
p
arate
p
ublication "GUIDE BOOK for s
p
are
p
arts su
pp
l
y
".
Attention to order
1The most of normal repair or initial repair within 1year since released month can be done by main parts.
2Minor parts should be ordered carefully in consideration of the actual usage of your repair and your technical skills.
3Main parts should be ordered and stocked appropriately in consideration of your parts usage anre repair usage for
similar models.
MAIN PARTS
Item Code No. Parts Name S
p
ecification Q'TY R
1
76409223 MODULE/WITHOUT MOVEMENT QW-2983AT-01TK 1 A
1 10207640 LCD K2983-01THP 1A
2 76409253 PCB A ’Y RJQ527615*001V01TK 1 A
MINOR PARTS
Item Code No. Parts Name S
p
ecification Q'TY R
1
3 10065657 BATTERY/ TORAGE CTL1616 1 C
4 10168959 CONTACT/BATTERY 2730 Q255819-2V05 1 C
5 72311913 CONTACT/BATTERY(-) 1828 Q359948B-2 1 C
6 10209258 EL YEL-2983-A-60 1 C
7 72311777 HOLDER 1381 Q456843-1 1 C
8 10209260 INTERCONNECTOR 2983-1 RJQ526558-001V01 1 C
9 10209261 INTERCONNECTOR 2983-2 RJQ526559-001V01 1 C
10 10065664 LABEL/ 2368 Q468543A-1 1 C
11 10123230 CREW/FLAT2730 RJQ513792-001V01 1 C
12 10209257 PACER 2983-2 RJQ526556-001V01 1 C
13 72301036 PRING/COIL 1604-2 Q461742A-1 2 C
14 72301045 PRING/COIL 2017-1 Q462959-1 2 C
15 72019249 PRING/COIL 675-3 Q413389A-1 1 C
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.-636.
Notes: Q - Used quantity
R - Rank
A : Important
C: Not Important — 5 —

—6 —
5. PRECAUTIONS FOR REPAIR: MODULE QW-2983
5-1. 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 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 arrows.
5-2. 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 A button, press Cand Dbuttons at the normal timekeeping 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”
Press any 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-2983
AB
CD
1
2

—7 —
5-3. SOLAR CELL-PCB ASS'Y CONTACT CHECKING
Check a Solar cell and PCB ass'y are contacted correctly by contact spring, when a module is
disassembled.
1. To enter TEST mode.
1) While pressing Abutton, press Band Dbuttons at the normal timekeeping mode.
2. Check a Solar cell and PCB ass'y contact in the following order.
1) Display side up and place the watch on the desk.
2) Check the display indicates as figure 2.
3) Display side down and place the watch on the desk more than 3 seconds.
Or go to a dark room and place the watch more than 3 seconds.
4) Check the display indicates as figure 3.
If“8888”isnot appearedonthe display, disassemble againthemodule and check thecontactspring
between the Solar cell and PCB.
Figure 3
Figure 1 Figure 2
Press A, Band Dbuttons
C
A
D
Place the watch in a dark
room more than 3 seconds.
3. To exit from TEST mode
Press any button.
5-4. TIME CALIBRATION SIGNAL TEST MODE
1) Press B, Cand Dbutton at the same time to enter the test mode.
2) Press Dbutton to switch from one signal source to another.
U60: Fort Collins, Colorado (Call Sign: WWVB, Frequency: 60kHz)
J40: Fukushima, Japan (Call Sign: JJY, Frequency: 40kHz)
J60: Fukuoka/Saga, Japan (Call Sign: JJY, Frequency: 60kHz)
3) Press Bbutton to start signal reception.
B
Appear “8888”on display.

—8 —
6.TROUBLESHOOTING FOR TIME RECEPTION: MODULE QW-2983
Yes
No
Yes
No
Yes
No
Yes
No
START
Check whether the Home City
code is selected correctly.
Perform MANUAL time
calibration signal reception
OK
There is a possibility of the bad location for reception.
Perform AUTO time
calibration signal reception
Replace the PCB ass'y
Signal
reception OK?
Signal
reception OK?
Signal
reception OK?
Replace the Case center
ass'y with antenna
Signal
reception OK?
OK
OK
OK