Casio QW-4302 User manual

SERVICE MANUAL
& PARTS LIST
(WITHOUT PRICE)
QW-4302
MODULE NO.
R
REF. NO. S/M-978
NOV. 2006
MRG-7000DJ

CONTENTS
Page
1. SPECIFICATIONS: MODULE QW-4302 .................................................... 1
2. DRAWINGS: MODULE QW-4302
2-1. LCD DIAGRAM .............................................................................................2
2-2. CHECKING TERMINALS AND COMPONENTS ..........................................3
3. EXPLODED VIEW: MODULE QW-4302 .................................................... 4
4. PARTS LIST: MODULE QW-4302 ............................................................. 5
5. PRECAUTIONS FOR REPAIR: MODULE QW-4302
5-1. AC (ALL CLEAR) AND REMOVING OF MODULE ...................................... 7
5-2. ACCURACY CHECKING .............................................................................. 7
5-3. SOLAR CELL-PCB ASS'Y CONTACT CHECKING..................................... 8
5-4. HOW TO CHECK TILT SENSOR.................................................................. 9
5-5. TIME CALIBRATION SIGNAL TEST MODE ................................................ 9
6. TROUBLESHOOTING: MODULE QW-4302............................................. 10

— 1 —
1. SPECIFICATIONS: MODULE QW-4302
Battery CTL1616 (Storage battery)
Note: Use CTL1616 only. Other storage battery or CR1616 can cause
damage to the watch.
Battery life Approx. 5 months
Current consumption 0.49 µA maximum
Alarm system Piezo plate on Cover/Back
Accuracy ±15 sec./month
Accuracy setting system Trimmer capacitor
Accuracy checking See page 7
Functions • LED light (With full auto light function)
• Solar powered
• Time calibration signal reception
Auto receive
Manual receive
Last date/time received display
• Time Calibration Signal
Receivable Time 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)
• Dual time
• 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 snooze feature for one alarm only
• Hourly time signal
• Low battery warning display
• Auto-calendar (to year 2039)
• 12/24-hour format
• Regular timekeeping:
Analog: 3 hands (Hr, min, sec)
Digital: Hr, min, sec, pm, month, date, day
Item Detail

— 2 —
2. DRAWINGS: MODULE QW-4302
2-1. LCD DIAGRAM
hyp0
point0
LC5 L15 L16 L17 L18 L19 L20 L29 L30 LC3 LC2 LC1 LC4
L9
L14 L13 L12 L11 L10
i5 k5
h5
f5
j5
e5
g5
a5
d5
b5
c5
a4
f4 b4
g4
e4 c4
d4
h4
col0
col1
a3 a2 a1 a0
f3 f2 f1 f0 b3 b2 b1 b0
g3 g2 g1 g0
e3 e2 e1 e0 c3 c2 c1 c0
d3 d2 d1 d0
rc0
rc1
rc2
a_light
chargerecover
snz
dst
L29
L11
L12
L13
L14
L15
L16
LC2 LC3 LC4 LC5LC1
L10
L 9 i5j5 dst a_light recover
g5d5 snz a5
charge
COM
SEG
LC2 LC3 LC4 LC5LC1
COM
SEG
c2
d3 g3
f3
f0
a3
e3 b2
e0
g2
d2
d4
b5 a2
f2
col1
c5
e2
col0
d0
c3 b3
point0 hyp0
g0 a0
SEG COM
L30
rc2 k5 h5 L17
L18
L19 f4 c1e4rc0 g4d1 f1e1b4c4h4 a1g1a4 b1
L20 rc1 e5 f5 c0 b0

—3 —
2-2. CHECKING TERMINALS AND COMPONENTS
SHEET/INSHULASION 2763
TAPE/ADHESIVE 1588
Short pad for N trimming
Short pad for R trimming
OSCILLATOR/CRYSTAL
SENSOR/TILT
CAPACITOR/TRIMMER
3. PCB ASS'Y
(76409062)
Short pad for switching modules
KI6-GND: Short (Soldering)
KI8-GND: Open (No Soldering)
KI7-GND: Short (Soldering)
VPMRPM
LC2
L29
L20 L19 L18 L17
L30 LC3
GND
R1 VDD2
Kl1 R1
BD
L
Kl7 GND
GND GND
Kl6
VDD2
GND
GND
GND
GND
R2
R3
R1
N1 GND
Kl8
N2
VDD2
L16
L6
L15
R1
GND
LC1 LC4 LC5
L26 L21 L22 L23 L24 L25
L12
L5
L1
LED2
CCP
VDD1
GND
VDD2
Kl3
GND
GND
RPM
LED1
L1
KC2
L
L2
L1
L
L3
L11
L27 L28
L9
L10 L14 L13
L4
L1
XTB XT
Kl4
L7 L8
GND KI5
KI2
GND
VSC
GND
VSC
Rxt2Rxt3
Rxt3
P7
Rxt2
VSC
VC1
VDSP
VC1
SCIN
R
GND
GND
R
KI5
KI3
VDD2
VCH
AC
SCIN
KI5
GNDB
VDD2
KI2
GND
VSC
VDSP
LED2
GND
LD1
GND
LED1
SCIN
GND
LD1
FET-D
VDD2
P7
GND
KI9
P2
P1
VC2
GND VCH
VDD3GNDVC4 VC3
FET-S
P2 VHF
KI9
GND
VCC
P5
VDD2 R
GND
XT
P4
KI4
R
P9
P5
VCC
GND
L
KI1
GND
SCR
GND
P7
CCP
SDO
GND
VDD2
GND
GND
L5 L3
L2
L1
L4
VSC

—4 —
3. EXPLODED VIEW: MODULE QW-4302
25 (10124961)
11 (10172626)
28 (10169526)
4 (76408261)
10 (10182650)
20 (72078546)
24 (10124960)
12 (10172632)
26 (72019599)
7 (10016598)
3 (76409062)
21 (10123230)
19 (72078349)
25 (10124961)
27 (10197474)
13 (10124962)
29 (72270343)
2 (10199933)
31 (10214214)
30 (72270294)
24 (10124960)
9 (10097687)
21 (10123230)
6 (10168959)
18 (10181225)
15 (10106512)
1 (76409146)
14 (10124963)
17 (10172627)
23 (10106509)
22 (10124956)
16 (10164777)
PCB Ass'y
5 (10065657)
Battery storage (CTL1616)
8 (10022106)

4. PARTS LIST: MODULE QW-4302
QW-4302YC-01TK
1 QW-4302YC-01TK
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 ---------------------------------------- Important
C Rank ---------------------------------------
-
Not Important
3. Batteries in Bulk pack on the tray will be supplied from our Overseas Spare Parts Section under charge ba
s
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".
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
76409050 MODULE/WITH MOVEMENT QW-4302YC-01TK 1 A
1 76409146 ANALOG BLOCK QW-4302MV-82TK 1 A
2 10199933 LCD S4302-01TH 1 A
3 76409062 PCB ASS'Y RJQ522137*002V01TK 1 A
MINOR PARTS
Item Code No. Parts Name S
p
ecification Q'TY R
1
4 76408261 ANTENNA ASS'Y RJQ522195*001V01TK 1 C
5 10065657 BATTERY/STORAGE CTL1616 1 C
6 10168959 CONTACT/BATTERY 2730 Q255819-2V05 1 C
7 10016598 CONTACT/BATTERY
(
-
)
2348 Q366836-1 1 C
8 10022106 CUSHION 2306-2 Q466886-1 1 C
9 10097687 CUSHION 2549 Q470646-1 1 C
10 10182650 CUSHION 3731 RJQ524044-001V01 1 C
11 10172626 HOLDER 3731 RJQ520563-001V01 1 C
12 10172632 HOLDER/ HOUR WHEEl 3731 RJQ520520-001V01 1 C
13 10124962 INTERCONNECTOR/ 2763-1 Q471264-1 1 C
14 10124963 INTERCONNECTOR/ 2763-2 Q471265-1 1 C
15 10106512 LABEL/ 2730 Q471007-1 1 C
16 10164777 LIGHT GUIDE Q373126-1V03 1 C
Notes: Q - Used quantity
R - Rank
A : Important
C: Not Important — 5 —

Item Code No. Parts Name S
p
ecification Q'TY R
1
17 10172627 PLATE/SHIELD 3731-1 RJQ520564-001V01 1 C
18 10181225 PLATE/SHIELD 3731-3 RJQ523783-001V01 1 C
19 72078349 SCREW Q47608A-1 2 C
20 72078546 SCREW/FLAT 355 Q411764-1 1 C
21 10123230 SCREW/FLAT2730 RJQ513792-001V01 4 C
22 10124956 SOLAR CELL BCS3028D6 1 C
23 10106509 SPRING/COIL 2730-1 Q470503-1 1 C
24 10124960 SPRING/COIL 2763-1 Q471262-1 2 C
25 10124961 SPRING/COIL 2763-2 Q471263-1 4 C
26 72019599 SPRING/COIL 967-1 Q430081-1 1 C
27 10197474 SPRING/LEAF Q373125-1V03 1 C
28 10169526 TAPE/ADHESIVE 3707 RJQ521248-001V01 1 C
29 72270343 WASHER 1325 Q450447-1 1 C
30 72270294 WASHER/745 Q436294A-1 1 C
31 10214214 WHEEL/HOUR 4302 RJQ528472-001V01 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 — 6 —

—7 —
5. PRECAUTIONS FOR REPAIR: MODULE QW-4302
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 B button, press Aand Cbuttons 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-4302
Metallic tweezers
A
C
B
D

—8 —
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 Dbutton, press Aand Bbuttons 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 two seconds.
Or go to a dark room and place the watch more than two seconds.
4) Check the display indicates as figure 3.
If "8888" is not appeared on the display, disassemble again the module and check the contact
spring between the Solar cell and PCB.
3. To exit from TEST mode
Press any button.
Figure 3
Figure 1 Figure 2
Press D, Aand Bbuttons
D
B
C
A
Place the watch in a dark
room more than two seconds.
Appear "8888" on display.

—9 —
5-4. HOW TO CHECK TILT SENSOR
1) Press A, Dand Cbuttons at the normal timekeeping mode.
2) Check the display indicates as figure 4.
3) Tilt the watch towards you more than 40 degrees.
4) Check the display indicates as figure 5.
5-5. TIME CALIBRATION SIGNAL TEST MODE
1) Press B, Cand Dbutton at the same time to enter the test mode.
2) Press Abutton to switch from one signal source to another.
J40: Fukushima, Japan (Call Sign: JJY, Frequency: 40kHz)
J60: Fukuoka/Saga, Japan (Call Sign: JJY, Frequency: 60kHz)
W60 : Fort Collins, Colorado (Call Sign: WWVB, Frequency: 60kHz)
3) Press Bbutton to start signal reception.
Figure 4 Figure 5
Tilt the watch towards you
more than 40°More than 40°
Appear "TL" on display. Appear "8888"ondisplay.

—10 —
6. TROUBLESHOOTING: MODULE QW-4302
This is a flow chart about signal reception.
Yes
No
Yes
No
Yes
START
Check whether the Home City
code is selected correctly.
To perform MANUAL time
calibration signal reception
OK
There is a possibility of location bad.
To perform AUTO time
calibration signal reception
Replace the PCB ass'y
Signal
reception OK?
Signal
reception OK?
Signal
reception OK?
OK
OK
No
Yes
No
Replace the Antenna ass'y
Signal
reception OK? OK

CASIO COMPUTER CO.,LTD.
Overseas Service Division
6-2, Hon-machi 1-Chome
Shibuya-ku, Tokyo 151-8543, Japan