Casio WVA-400D Service Manual And Parts List Download Page 9

— 7 —

To turn Power Saving on and off

1. In the Timekeeping Mode, hold down 

 until the city

code starts to flash, which indicates the setting screen.

The second hand will move at high speed to the 12
o’clock position, where it will stop.

2. Press 

A

 again.

3. Press 

C

 seven times until the Power Saving on/off

screen appears.

4. Press 

D

 to toggle Power Saving on (

ON 

) and off

(

OF

).

5. Press 

 to exit the setting screen.

l l l l l l

l

l

l

l

l

l

l

l

l

ll

l

l l

The second hand will advance at high speed to the
correct position in accordance with the digital time
seconds count, and resume normal movement from
there.

The Power Saving indicator (

PS

) is on the display in all

modes while the Power Saving is turned on.

Auto Return Features

If you leave the watch in the Alarm, Data Memory, or Hand Setting Mode for two or
three minutes without performing any operation, it automatically returns to the
Timekeeping Mode.

If you leave the watch with a flashing setting or cursor on the display for two or three
minutes without performing any operation, the watch automatically exits the setting
screen.

Scrolling

The 

B

 and 

D

 buttons are used in various modes and setting screens to scroll

through data on the display. In most cases, holding down these buttons during a scroll
operation scrolls through the data at high speed.

Initial Screens

When you enter the World Time, Alarm, or Data Memory Mode, the data you were
viewing when you last exited the mode appears first.

Time Calibration Signal Reception Precautions

Strong electrostatic charge can result in the wrong time being set.

Even when the watch is within the reception range of the transmitter, signal
reception is impossible if the signal is blocked by mountains or other geological
formations between the watch and signal source.

Signal reception is affected by weather, atmospheric conditions, and seasonal
changes.

The time calibration signal is bounced off the ionosphere. Because of this, such
factors as changes in the reflectivity of the ionosphere, as well as movement of the
ionosphere to higher altitudes due to seasonal atmospheric changes or the time of
day may change the reception range of the signal and make reception temporarily
impossible.

Even if the time calibration signal is received properly, certain conditions can cause
the time setting to be off by up to one second.

The current time setting in accordance with the time calibration signal takes priority
over any time settings you make.

The watch is designed to automatically update the date and day of the week for the
period January 1, 2000 to December 31, 2099. Setting of the date by the time
calibration signal cannot be performed starting from January 1, 2100.

This watch can receive signals that differentiate between leap years and non-leap
years.

Though this watch is designed to receive both time data (hour, minutes, seconds)
and date data (year, month, day), certain signal conditions can limit reception to time
data only.

When all five auto receptions are successful (0:00 a.m., 1:00 a.m., 2:00 a.m., 3:00
a.m., and 4:00 a.m.), the watch uses the data of the last reception for calibration.
When only one reception is successful, the watch uses the data of the successful
reception.

Normally, the signal reception date shown by the Last Signal screen is the date data
included in the received time calibration signal. When only time data is received,
however, the Last Signal screen shows the date as kept in the Timekeeping Mode at
the time of signal reception.

If you are in an area where proper time calibration signal reception is impossible, the
watch keeps time within  15 seconds a month at normal temperature.

If you have problems with proper time calibration signal reception or if the time
setting is wrong after signal reception, check your current city code, DST (summer
time), and auto receive settings. The following are the initial factory defaults for these
settings.

Setting
City code
DST (summer time)

Auto receive

Initial Factory Default

BER

(Berlin)

A

(Auto switching)

DST

ON R/C

 

(Auto receive)

Timekeeping

Resetting the seconds to 00

 

while the current count is in the range of 30 to 59

causes the minutes to be increased by 1. In the range of 00 to 29, the seconds are
reset to 00

 

without changing the minutes.

The day of the week is automatically displayed in accordance with the date (year,
month, and day) settings.

The year can be set in the range of 2000 to 2099.

The watch’s built-in full automatic calendar makes allowances for different month
lengths and leap years. Once you set the date, there should be no reason to change
it except after you have the watch’s battery replaced or when battery power drops to
Level 4.

The current time for all city codes in the Timekeeping Mode and World Time Mode is
calculated in accordance with the Greenwich Mean Time (GMT) differential for each
city, based on your Home City time setting.

GMT differential is calculated by this watch based on Universal Time Coordinated
(UTC*) data.

* The letters “UTC” stands for “Universal Time Coordinated,” which is the world-wide scientific

standard of timekeeping. It is based upon carefully maintained atomic (cesium) clocks that
keep time accurately to within microseconds. Leap seconds are added or subtracted as
necessary to keep UTC in sync with the Earth’s rotation. The reference point for UTC is
Greenwich, England.

12-hour/24-hour Timekeeping  Formats
The 12-hour/24-hour timekeeping format you select in the Timekeeping Mode is also
applied in all other modes.

With the 12-hour format, the P (PM) indicator appears on the display for times in the
range of noon to 11:59 p.m. and no indicator appears for times in the range of
midnight to 11:59 a.m.

With the 24-hour format, times are displayed in the range of 0:00 to 23:59. The
indicator 24 indicates the 24-hour format.

Inputting Text

The following describes how to input text in the Data Memory Mode.

To input characters

1. When the cursor is on the display, use 

B

 and 

D

 to

cycle through the available letters, numbers and
symbols, in the sequence shown below.

Press 

D

.

a

 to 

z

(lower-case)

(space)

*

 to 

+

(symbol)

0

 to 

9

(number)

A

 to 

Z

(upper-case)

Press 

B

.

Data Memory

Input Screen

l ll

lll

lll

ll

l

Cursor

2. When the character you want is at the cursor position,

press 

C

 to move the cursor to the right.

3. Repeat steps 1 and 2 to input the rest of the characters

you want.

HONOLULU

ANCHORAGE

LOS ANGELES

DENVER

CHICAGO

NEW YORK

CARACAS

RIO DE JANEIRO

LONDON

PARIS

BERLIN

City Code Table

Auto light switch precautions

Wearing the watch on the inside of your wrist, as well as movement or vibration of
your arm can cause the auto light switch to activate and illuminate the display. To
avoid running down the battery, turn off the auto light switch whenever engaging in
activities that might cause frequent illumination of the display.

The backlight may not light if the face of the watch is
more than 15 degrees above or below parallel. Make
sure that the back of your hand is parallel to the ground.

The backlight turns off in about one second, even if you
keep the watch pointed towards your face.

Static electricity or magnetic force can interfere with
proper operation of the auto light switch. If the backlight
does not light, try moving the watch back to the starting
position (parallel with the ground) and then tilt it back
toward you again. If this does not work, drop your arm
all the way down so it hangs at your side, and then bring
it back up again.

More than 15 degrees
too high

Under certain conditions, the backlight may not light until
about one second after you turn the face of the watch
towards you. This does not necessarily indicate
malfunction of the backlight.

You may notice a very faint clicking sound coming from
the watch when it is shaken back and forth. This sound
is caused by mechanical operation of the auto light
switch, and does not indicate a problem with the watch.

City

City

GMT

Other major cities in same time zone

Code

Differential

– – –

HNL

ANC

LAX

DEN

CHI

NYC

CCS

RIO

– – –
– – –
GMT

LON
PAR
BER

PAGO PAGO
PAPEETE
NOME
SAN FRANCISCO, LAS VEGAS, VANCOUVER,
SEATTLE, DAWSON CITY
EL PASO, EDMONTON
HOUSTON, DALLAS/FORT WORTH,
NEW ORLEANS, MEXICO CITY, WINNIPEG
MONTREAL, DETROIT, MIAMI, BOSTON,
PANAMA CITY, HAVANA, LIMA, BOGOTA
LA PAZ, SANTIAGO, PORT OF SPAIN
SAO PAULO, BUENOS AIRES, BRASILIA,
MONTEVIDEO

PRAIA
DUBLIN, LISBON, CASABLANCA, DAKAR,
ABIDJAN
MILAN, ROME, MADRID, AMSTERDAM, ALGIERS,
HAMBURG, FRANKFURT, VIENNA, STOCKHOLM

Based on data as of June 2002.

ATHENS

CAIRO

JERUSALEM

JEDDAH

TEHRAN

DUBAI

KABUL

KARACHI

DELHI

DHAKA

YANGON

BANGKOK

HONG KONG

TOKYO
SEOUL

ADELAIDE

SYDNEY

NOUMEA

WELLINGTON

+2

+3

+3.5
+4
+4.5
+5
+5.5
+6
+6.5
+7

+8

+9

+9.5
+10
+11
+12

HELSINKI, ISTANBUL, BEIRUT, DAMASCUS,
CAPE TOWN

KUWAIT, RIYADH, ADEN, ADDIS ABABA, NAIROBI,
MOSCOW
SHIRAZ
ABU DHABI, MUSCAT

MALE
MUMBAI, KOLKATA
COLOMBO

JAKARTA, PHNOM PENH, HANOI, VIENTIANE
SINGAPORE, KUALA LUMPUR, BEIJING, TAIPEI,
MANILA, PERTH, ULAANBAATAR
PYONGYANG

DARWIN
MELBOURNE, GUAM, RABAUL
PORT VILA
CHRISTCHURCH, NADI, NAURU ISLAND

ATH

CAI

JRS

JED

THR
DXB

KBL

KHI

DEL
DAC

RGN

BKK

HKG

TYO
SEL
ADL
SYD

NOU
WLG

–11
–10
–9

–8

–7

–6

–5

–4

–3

–2
–1

+0

+1

See the “Character List” for information about the
characters you can input.

Data Memory Management

Data memory can hold up to 315 characters total, while each record can contain up to
63 characters. This means that 40 records can be stored in data memory when each
record contains seven characters of text or less.

Backlight Precautions

The illumination provided by the backlight may be hard to see when viewed under
direct sunlight.

The backlight automatically stops illuminating whenever an alarm sounds.

Frequent use of the backlight shortens the battery life.

±

Summary of Contents for WVA-400D

Page 1: ...SERVICE MANUAL PARTS LIST WITHOUT PRICE QW 2727 2730 MODULE NO R REF NO S M 817 JUN 2003 WVA 400D WVA 400DJ Ver 1 Nov 2003...

Page 2: ...HECKING TERMINALS AND COMPONENTS 12 3 4 N1 N2 R1 R3 PADS 13 4 EXPLODED VIEW MODULE QW 2727 2730 14 5 PARTS LIST MODULE QW 2727 2730 16 6 PRECAUTIONS FOR REPAIR MODULE QW 2727 2730 6 1 AC ALL CLEAR AND...

Page 3: ...tion Signals Fort Collins Colorado Call Sign WWVB Frequency 60kHz Fukushima Japan Call Sign JJY Frequency 40kHz Fukuoka Saga Japan Call Sign JJY Frequency 60kHz e DATE MEMORY Meomory capacity Up to 40...

Page 4: ...and will move at high speed to the 12 o clock position where it will stop 2 Use D and B to select the city code you want to use as your Home City The following are the city codes for major cities in t...

Page 5: ...where it will stop 2 Press Ctwice to move the flashing to the auto receive on off setting 3 Press Dto toggle auto receive on ON and off OF If the current Home City setting is a city code that does no...

Page 6: ...rn to the Timekeeping Mode press C World Time The World Time Mode digitally displays the current time in 30 cities 29 time zones around the world Pressing A in the World Time Mode causes the applicabl...

Page 7: ...To delete a data memory record 1 In the Data Memory Mode display the record you want to delete 2 Hold down A until the flashing cursor appears on the display 3 Press B and D at the same time to delet...

Page 8: ...d to set the time and date after the battery reaches Level 3 indicated by flashing CHARGE indicator C from Level 4 You will not be able to configure any of the other settings until the battery reaches...

Page 9: ...imekeeping Mode and World Time Mode is calculated in accordance with the Greenwich Mean Time GMT differential for each city based on your Home City time setting GMT differential is calculated by this...

Page 10: ...p q r s t u v w x y z a b c e f g h i j k l m n o p q r s t u v w x y z _ e X Character List d A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q...

Page 11: ...13y1 x12y1 x11y1 x10y1 x9y1 x8y0 sig x6y0 x5y0 alm x3y0 x2y0 24 x0y0 a_light rc0 x8y1 x7y0 x6y1 x5y1 x4y0 x3y1 x2y1 x1y0 x0y1 col0 rc1 LC1 LC2 LC3 LC4 LC5 x22y2 x21y2 x20y2 x19y2 x18y2 x17y2 x16y2 x15...

Page 12: ...h2 Crh1 Rant1 Rs Rd Cc FET Rpd Rant3 14 DEC2 SK KS 2 6 6 4 4 4 3 3 3 3 3 5 3 10 11 12 3 An B1 Tr2 LED2 LED1 R2 R3 LED3 R4 2 2 L32 L36 L37 L55 L1 L2 L3 An B2 3 3 9 9 9 1 13 14 14 14 14 14 14 14 14 14 1...

Page 13: ...Rant1 Rs Rd Cc FET Rpd Rant3 14 DEC2 SK KS 2 6 6 4 4 4 5 10 11 12 An B1 Tr2 LED2 LED1 R2 R3 LED3 R4 2 2 L32 L36 L37 L55 L1 L2 L3 An B2 9 9 9 1 3 13 RPM Tr3 14 14 14 3 3 3 3 3 3 3 3 3 1 No bonding 2 G...

Page 14: ...4 2 1 S 9 KC3 KI9 12 13 14 KC4 16 1 2 3 4 5 GND 7 8 LL1 GND GND 3 Capacitor Chip Cbat Capacitor Chip Cxt Transistor Tr3 Transistor Tr1 Transistor Rcp Transistor Rbat Transistor Tr2 Diode Di2 LED3 Diod...

Page 15: ...3 Xtal3 2 1 S 9 KC3 KI9 12 13 14 KC4 16 1 2 3 4 5 GND 7 8 LL1 GND GND 3 Capacitor Chip Cbat Capacitor Chip Cxt Transistor Tr3 Transistor Tr1 Transistor FET Transistor Rcp Transistor Rbat Transistor Tr...

Page 16: ...28 7227 0294 26 7201 9249 22 1013 4221 16 1010 6512 11 1002 7903 15 1010 6521 3a 7640 6322 3b 7640 6222 13 1011 7191 12 7231 1777 23 1010 6520 7 7640 6260 2 1010 6522 8 1006 5657 Battery Storage CTL16...

Page 17: ...15 ANALOG BLOCK MODULE QW 2727 2730 20 7228 0511 10 1010 3618 9 1010 3617...

Page 18: ...SS Y Q371418 1 QW 2727YCSA 2730YCSA Common 1 A 10 1010 3618 COIL ASS Y Q371419 1 QW 2727YCSA 2730YCSA Common 1 A 11 1002 7903 CONTACT BATTERY Q39603B 1 QW 2727YCSA 2730YCSA Common 1 C 12 7231 1777 HOL...

Page 19: ...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 b...

Page 20: ...atch more than two seconds 4 Check the display indicates as figure 3 If 88 is not appeared on the display disassemble again the module and check the contact spring between the Solar cell and PCB 3 To...

Page 21: ...e 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 a...

Page 22: ...CASIO TECHNO CO LTD Overseas Service Division 6 2 Hon machi 1 Chome Shibuya ku Tokyo 151 8543 Japan Ver 1 Correction of page 14 and 16...

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