Casio GW-002J Service Manual & Parts List Download Page 8

— 6 —

T

roubleshooting

The watch cannot receive the time calibration signal.

Is the signal being transmitted?

Though the Japanese calibration signal (Call Sign: JJY) is

continually transmitted by the National Institute of Information and

Communications T

e

chnology (NICT) in theory

, it may sometimes

be interrupted for periodic maintenance work, or because of

lightning or other problems.

Are you within the reception range of a transmitter?

See 

“Reception Range

” for information about areas where the

watch can receive the signal.

Is there something in the immediate area that may be interfering

with reception?

Even if you are within the reception range of a transmitter

, objects

between you and the transmitter or electrical noise can interfere

with reception. 

A

v

oid such areas during signal reception. See

“Location

” for more information.

Do you have the correct Home City code selected?

Remember that auto receive is not performed unless 

TYO

(T

okyo), 

SEL

 (Seoul) 

NYC

 (New 

Y

o

rk), 

CHI

 (Chicago), 

DEN

(Denver), or 

LAX

 (Los 

Angeles) is selected as the Home City

.

Select the correct Home City code using the procedure under

“Configuring Home 

T

ime Settings

”.

Is auto receive turned of

f (OFF)?

Use the procedure under 

“Configuring Auto 

Receive 

Settings

” to

turn on auto receive.

Is the watch in any mode other than the 

T

imekeeping Mode or

World 

T

ime Mode during the auto receive times (midnight, 1:00

a.m., 2:00 a.m., 3:00 a.m., 4:00 a.m., and 5:00 a.m.)?

Auto receive is performed only when the watch is in the

T

imekeeping Mode or W

o

rld 

T

ime Mode. It is not performed if the

watch is in any other mode.

T

ime calibration signal reception is successful, but the hourly

time signal and current time are slightly off.

After the watch receives the time calibration signal, it performs an

internal decoding process before updating its time setting.

Because of this, the time setting may be slightly of

f (within one

second).

T

ime calibration signal reception is successful, but the current

time is one hour fast.

Do you have summer time (DST) turned on (ON)? Use the

procedure under 

“Configuring Home 

T

ime Settings

” to turn of

f

summer time.

T

ime calibration signal reception is successful, but the current

time setting is wrong.

Is the correct city code selected for your Home City?

If you are in Japan, you should have 

TYO

 selected for your Home

City

. For other areas, select the correct Home City code using the

procedure under 

“Configuring Home 

T

ime Settings

”.

W

orld time lets you display the current time in any one of 30 cities

(29 time zones) around the world.

When you enter the W

o

rld T

ime Mode, the screen for the city that

was displayed when you last exited the mode appears first.

The seconds count in the W

o

rld 

T

ime Mode is linked with the

T

imekeeping Mode seconds count.

The same 12-hour/24-hour format you select for the 

T

imekeeping

Mode time is also applied in the W

o

rld 

T

ime Mode.

Important!

If the W

o

rld 

T

ime Mode time is incorrect, check the current time

settings in the 

T

imekeeping Mode and the W

o

rld 

T

ime city

settings.

For more information, see 

“Configuring Home 

T

ime Settings

”.

Using Summer T

ime (DST)

Summer time, or Daylight Saving 

T

ime (DST) as it is known in

some countries, calls for setting clocks ahead one hour during the

summer season. Note that the use of summer time depends on

the country and even the local area.

T

o

 turn summer time on or off

1.

In the W

orld T

ime Mode,

use the 

DDDDD

 and 

BBBBB

 buttons

to display the screen for

the city code whose

summer time setting you

want to change.

2.

Hold down the 

AAAAA

 button

for about two seconds.

This toggles summer time on and of

f.

The 

“DST

” indicator appears on the display and timekeeping

is advanced by one hour when summer time is turned on.

Y

ou can turn summer time on or of

f independently for each

W

o

rld 

T

ime Mode city

. Note, however

, that you cannot turn on

summer time for the 

“GMT

” city code.

T

u

rning on summer time for your home time city causes the

time shown in the 

T

imekeeping Mode to be advanced by one

hour

.

W

orld T

ime City Code List

City

Code

City Name

 –

 –

HNL

ANC

L AX

DEN

CHI

NYC

CCS

RIO

 –

 –

 –

 –

GMT

LON

PA

R

BER

AT

H

CAI

Honolulu

Anchorage

Los Angeles

Denver

Chicago

New Y

ork

Caracas

Rio de Janeiro

Greenwich Mean 

Time

London

Paris

Berlin

Athens

Cairo

11

10

9

8

7

6

5

4

3

2

1

+0

+0

+1

+1

+2

+2

GMT

Differential

City

Code

City Name

GMT

Differential

JRS

JED

THR

DXB

KBL

KHI

DEL

DAC

RGN

BKK

HKG

SEL

TYO

ADL

SYD

NOU

WLG

Jerusalem 

Jeddah

T

eheran

Dubai

Kabul

Karachi

Delhi

Dakar

Y

angon

Bangkok

Hong Kong

Seoul

T

okyo

Adelaide 

Sydney

Noumea

W

ellington

+2

+3

+3.5

+4

+4.5

+5

+5.5

+6

+6.5

+7

+8

+9

+9

+9.5

+10

+1

1

+12

The contents of the above table are current as of June 2004.

T

ime dif

ferentials in the above table are in accordance with

Universal T

ime Coordinated (UTC).

DST

 Indicator

World Time Mode

The auto receive ON/OFF settings don’t appear when

configuring auto receive settings.

Auto receive ON/OFF settings do not appear on the display

unless 

TYO

 (T

okyo), 

SEL

 (Seoul), 

NYC

 (New 

Y

o

rk), 

CHI

(Chicago), 

DEN

 (Denver), or 

LAX

 (Los 

Angeles) is selected as the

Home City

. Use the procedure under 

“Configuring Home 

T

ime

Settings

” to select your correct Home City

.

The auto receive 

AUT

O

J40, and J60 settings do not appear

when configuring auto receive settings.

The 

A

T

, J40, and J60 transmitter selection mode options are

available only when 

TYO

 (T

okyo) is selected as the Home City

code. Use the procedure under 

“Configuring Home 

T

ime Settings

to select your correct Home City

.

What time is auto receive performed?

Auto receive is performed in the middle of the night, when

reception conditions are best. Before going to bed at night, place

the watch near a window

, with its 12 o

’clock position facing in the

general direction of the transmitter

.

How can I perform manual receive?

Hold down the lower right 

D

 button for about two seconds. 

The

watch will beep to indicate that manual receive has started. Place

it near a window

, with its 12 o

’clock position facing in the general

direction of the transmitter

.

How can I view the last reception date and time?

In the 

T

imekeeping Mode, press the lower right 

D

 button. 

This

will display the date and time that the time calibration signal was

last received successfully

T

o

 return to the T

imekeeping Mode,

press the 

D

 button again. See 

“T

o

 view the last reception date

and time

” for more information.

Check the auto signal reception setting whenever you have

problems with signal reception or when the time setting produced

by signal reception is incorrect.

The initial factory default configuration of the reception settings

are shown below

Y

o

u do not need to change these settings if you

use the watch in Japan.

Auto Receive

Home City

Summer T

ime

T

okyo

Auto Japan transmitter select 

(40kHz/ 60kHz)

Auto switching in accordance 

with signal data

 

T

o

 search for a city code

In the W

orld T

ime Mode, press the 

DDDDD

 (westward) or 

BBBBB

(eastward) button.

This scrolls the available city codes.

Holding down the 

B

 and 

D

 buttons scrolls at high speed.

(Eastward)

(W

estward)

City Code

Current T

ime 

in 

Selected City

Summary of Contents for GW-002J

Page 1: ...SERVICE MANUAL PARTS LIST WITHOUT PRICE QW 2914 MODULE NO R REF NO S M 883 MAR 2005 GW 002J Ver 1 Apr 2007...

Page 2: ...TERMINALS AND COMPONENTS 12 4 EXPLODED VIEW MODULE QW 2914 14 5 PARTS LIST MODULE QW 2914 15 6 PRECAUTIONS FOR REPAIR MODULE QW 2914 6 1 AC ALL CLEAR AND REMOVING OF MODULE 16 6 2 ACCURACY CHECKING 1...

Page 3: ...ve Three times a day at 1 00AM 2 00AM and 3 00AM Manual receive Last date time received display ReceivableTime Calibration Signals Fort Collins Colorado Call sign WWVB Frequency 60KHz Fukushima Japan...

Page 4: ...u place the watch in a well lit area To turn Power Saving on and off Use the procedure under Configuring Home Time Settings to turn Power Saving on or off Leaving the watch in a drawer or anywhere els...

Page 5: ...luminated illumination will turn off Display illumination does not work while you are performing a time calibration signal manual receive operation You may hear humming sound from the watch while the...

Page 6: ...s the time of day can even make reception impossible even when you are within range of the transmitter Best reception is possible late at night Location Reception is difficult and may even be impossib...

Page 7: ...A A button This will exit the setting screen and return to the last reception date and time screens To return to the Timekeeping Mode press the D button again The watch will return to the Timekeeping...

Page 8: ...buttons to display the screen for the city code whose summer time setting you want to change 2 Hold down the A A A A A button for about two seconds This toggles summer time on and off The DST indicat...

Page 9: ...alarm the alarm will sound again in about five minutes SNZ flashes on the display during the five minute period between snooze alarms indicating that the alarm will sound again The snooze alarm will...

Page 10: ...Home City and other settings Use the Timekeeping Mode to configure home time settings Also use the following procedure when you want to turn Power Saving on or off To configure home time settings 1 I...

Page 11: ...nges the display illumination duration See To specify the illumination duration for more information 8 While the hour minutes year month or day setting is flashing use the D D D D D and B B B B B butt...

Page 12: ...f5 x10y3 x10y1 x11y3 x11y4 x14y4 e5 x11y2 x14y1 x11y0 x14y2 x14y0 x14y3 x15y2 x13y2 x13y1 x15y0 DST x13y0 x13y3 PM x12y2 x12y1 x12y0 x12y3 x12y4 x13y4 x15y1 x16y0 AUTOEL x15y4 RECOVER f3 x16y2 b5 SPL1...

Page 13: ...Asel GND2 1 No bonding 2 Kl7 GND Open No Soldering Kl6 KC1 Open No Soldering Kl6 KC3 Open No Soldering 3 Latch type key 4 Short Soldering R trimming 5 Inclination sensor 6 Short Soldering N trimming 7...

Page 14: ...D KI9 GND GNDB KI3 KI1 GND GND KC1 KI6 GND VSC VDD2 GND KI8 GND GND SCR SCIN GND KC3 KI7 GND N1 SCIN N2 KI6 R3 R1 GND R2 GND SCIN KI4 KI2 KI1 KI2 KI4 KI3 P12 VSC VDD2 BD KI8 ELD KI2 AC KI5 VCH VC1 KI9...

Page 15: ...3 VC4 SCIN GND GNDB GND VSC KI5 GND ELD K12 KI1 LEDOUT R1 LEDOUT LD1 LEDOUT GND SCR VDD2 BD KI3 AC VC1 KI8 CIL VCH KI4 LD 1 RT 2 G ND G ND G ND GND LL1 VC1 GND VDD3 GND R1 VDD2 LL1 GND XTB KI5 VC2 VDD...

Page 16: ...8959 8 7231 1777 13 1012 3230 11 1016 9827 1 chip type 12a 7640 8263 2 chip type 12b 7641 0226 PCB ass y 7 1017 2603 19 1010 6532 10 1006 5664 4 1008 3365 16 1017 2600 19 1010 6532 9 1017 2597 18 723...

Page 17: ...9364 1 QW 2914YC 01TK 2 C 7 1017 2603 EL YEL 2914 A 00 QW 2914YC 01TK 1 A 8 7231 1777 HOLDER 1381 Q456843 1 QW 2914YC 01TK 1 C 9 1017 2597 INTERCONECTOR 2914 RJQ521721 001V01 QW 2914YC 01TK 1 C 10 100...

Page 18: ...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 bu...

Page 19: ...the watch more than 3 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...

Page 20: ...elected 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 Sign...

Page 21: ...2 types of PCB ass y are both in use care must be taken not to use the incorrect parts during repairs The 1 chip and 2 chip types as well as using different PCB ass y also use different spacers and h...

Page 22: ...Ver 1 Apr 2007 Correction of pages 12 13 14 15 and 19 CASIO COMPUTER CO LTD Overseas Service Division 6 2 Hon machi 1 Chome Shibuya ku Tokyo 151 8543 Japan...

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