Casio QW-3390, BGT-3010 Service Manual & Parts List

SERVICE MANUAL

& PARTS LIST

REF. NO. S/M-891

APR. 2005

MODULE NO.

QW-3390

BGT-3010

Ver.1 : May. 2006

(WITHOUT PRICE)

CONTENTS

Page

1. SPECIFICATIONS: MODULE QW-3390 .................................................... 1

2. OPERATION CHART: MODULE QW-3390 ............................................... 2

3. DRAWINGS: MODULE QW-3390

3-1. LCD DIAGRAM ............................................................................................. 8

3-2. CIRCUIT DIAGRAM ...................................................................................... 9

3-3. CHECKING TERMINALS AND COMPONENTS ......................................... 10

4. EXPLODED VIEW: MODULE QW-3390 ................................................... 11

5. PARTS LIST: MODULE QW-3390 ............................................................ 12

6. PRECAUTIONS FOR REPAIR: MODULE QW-3390

6-1. AC (ALL CLEAR) AND REMOVING OF MODULE .....................................13

6-2. ACCURACY CHECKING ............................................................................. 14

6-3. TIME CALIBRATION SIGNAL TEST MODE ............................................... 14

7. TROUBLESHOOTING: MODULE QW-3390............................................. 15

1. SPECIFICATIONS: MODULE QW-3390

Item Detail

Battery CR1616 Battery life Approx. 2 years Current consumption 0.5 µA maximum Alarm system Piezo plate on Cover/Back Accuracy ±15 sec./month Accuracy setting system Trimmer capacitor Accuracy checking See page 14 Functions • Time calibration signal reception

Auto receive Manual receive Last date/time received display

• Time Calibration Signal Receivable Time Calibration Signals Fukushima, Japan (Call Sign: JJY, Frequency: 40kHz) Fukuoka/Saga, Japan (Call Sign: JJY, Frequency: 60kHz) Fort Collins, Colorado (Call Sign: WWVB, Frequency: 60kHz)

• World Time 29 time zones (30 cities), daylight saving time on/off

• 1/100-sec. stopwatch Measuring capacity: 59’59.99" Measuring modes: Split time

• Daily alarms 1 independent daily alarms, hourly time signal

• LED light (with full auto light function)

• Auto-calendar

• 12/24-hour format

• Regular timekeeping: Hour, minutes, seconds, pm, month, date, day

— 1 —

2. OPERATION CHART: MODULE QW-3390

Hourly Time Signal

Alarm

World Time Mode Alarm Mode

City Code

Hourly Time Signal off

•

Alarm off

•

Current Time

in Selected City

Elapsed Time

Mode Indicator

Mode

Indicator

Hand Setting Mode Stopwatch Mode

Transmitter

Either the Mt. Otakadoya signal (40kHz) or the Mt. Hagane signal (60kHz)

Fort Collins, Colorado signal

TYO

Home City

LAX, DEN, CHI, NYC

City Code List”.

Reception Range

This watch is designed to receive the standard time calibration signal of Japan (JJY) or of the United States (WWVB). The signal that is

received depends on the current Home Time setting.

• For information about selecting a Home City, see “Configuring Home Time Settings”. For information about city codes, see the “World Time

3000km

U.S. Transmitter

Location

1000km

Japan Transmitter

Locations

1000km

(40kHz)

Mt. Otakadoya

500km

(60kHz)

Mt. Hagane

Fort Collins

receivable up to 3,000 kilometers from the transmitter. Note

that the wave is relatively weak at distances greater than

1,000km, so reception may be poor at long distances.

• Under optimum conditions, the calibration signal should be

1000km

receivable up to 1,000 kilometers from the transmitter. Note

that the wave is relatively weak at distances greater than

500km, so reception may be poor at long distances.

• Under optimum conditions, the calibration signal should be

range of the transmitter.

• Geographic contours, nearby buildings, seasonal conditions, the time of day, can even make reception impossible even when you are within

• Best reception is possible late at night.

Seconds

Day of the Week

2-second interval

Calendar Screen

Screen.

Changing Display Screen Contents

Each press of the button cycles display contents in the

Month.Day

following sequence: Calendar Screen Seconds Screen

Current Time

Seconds ScreenCurrent Time Screen

AM)

PM indicator

(no indicator for

Timekeeping Mode

(Light)(Screen Switching)

C button sounds a confirmation tone and cycles through available modes in the sequence shown below.

Modes and Display Screens

Button Button

any operation for about two or three minutes.

Each press of the

• The display will automatically revert to the Timekeeping screen if you leave the Alarm or Hand Setting screen displayed without performing

Button Button

(Mode switching)

Days of the Week

: Saturday

SUN: Sunday MON: Monday TUE: Tuesday

WED: Wednesday THU: Thursday FRI: Friday

SAT

Minutes

Hour

— 2 —

Note that transmission of the standard wave may be

the National Institute of Information and Communications

Technology (NICT). It is a long wave signal transmitted 24 hours a

day from the Mt. Otakadoya transmitter (40kHz) located in

Tamura-gun, Fukushima Prefecture, and from the Mt. Hagane

transmitter (60kHz) located on the border between Saga

Calibration Signal

• The Japanese calibration signal (Call Sign: JJY) is maintained by

How a Radio-controlled Watch Works

What is a radio-controlled watch?

Your radio-controlled watch is designed to receive a time

Prefecture and Fukuoka Prefecture.

• The U.S. calibration signal (Call Sign: WWVB) is transmitted by

Signal is received

using built-in antenna.

Long-

wave time

calibration

signal

Transmitter

calibration signal that contains standard time data, and adjust its

current time setting accordingly.

interrupted occasionally due to maintenance, lightening, etc.

the National Institute of Standards and technology from Fort

Collins, Colorado.

Watch decodes

received data

and converts it

to time data.

Time is adjusted

according to time

data.

Decode

Internally

Time data

Signal data

atch W

clock

atomic

Cesium

After the watch receives the Standard Time signal, it performs

internal calculations to determine the current time. Because of

this, there may be an error of up to one second in the

displayed time.

Stable

Receive Indicator

Unstable

■ Receive Indicator

The receive indicator cycles from

“Unstable” through “Stable” as

shown below while reception is in

progress. How far it cycles depends

on the signal strength. Keep the

watch in a location where reception

is stable while reception is in

progress.

D button for about

transmitter selection mode, signal reception can take up to

■ Time Required for Reception

12 minutes.

A calibration signal receive operation takes anywhere from about

two to six minutes.

• Note that when “AUTO” (Auto Select) is specified as the

In the Timekeeping Mode, hold

down the

two seconds.

• See “Configuring Auto Receive Settings” for more information.

■ To perform manual receive

• The watch will beep and

determine the best location for signal reception.

• Use the receive indicator to check reception status and to

• Note that weather, the time of day, surroundings, and other

seconds for reception to stabilize.

• Even under optimum reception conditions, it can take about 10

reception will start. An indicator

will appear on the display to

indicate reception conditions.

■ To interrupt reception

factors can all affect reception.

D button.

Press the

• All other buttons besides D are disabled during signal reception.

When reception is successful

The watch terminates reception and adjusts the current time. Next

it beeps and then displays the date and time that the adjustment

was performed.

Reception Error (ERR Indicator)

The watch does not adjust its current time setting, and displays

• AUTO

Auto receive turned on with automatic selection of either the

Mt. Otakadoya signal (40kHz) or the Mt. Hagane signal

Auto Receive Settings when the Home City is TYO

D button to

cycle through the

available auto receive

you do not perform any operation for about one or two minutes.

• The watch will return to the Timekeeping Mode automatically if

“ERR” when signal reception is unsuccessful for some reason.

settings.

3. Press the

(60kHz), whichever is strongest.

•

Auto receive turned on for the Mt. Otakadoya signal (40kHz).

•

Auto receive turned on for the Mt. Hagane signal (60kHz).

• OFF

Auto receive turned off.

way you want, press the

A button.

screen and return to the last

reception date and time

• This will exit the setting

4. When the setting is the

• ON

Auto receive turned on for the Ft. Collins, Colorado signal.

• OFF

Auto Receive Settings when the Home City is NYC,

CHI, DEN, or LAX

screens.

Mode, press the D button

again.

• To return to the Timekeeping

Auto receive turned off.

Timekeeping Mode

automatically if you do not

perform any operation for

about one or two minutes.

• The watch will return to the

midnight, 2:00, 3:00 and 4:00 each morning.)

Manual receive (You initiate reception using a button operation.)

operations shown above, auto receive is performed one more

• Auto receive (Reception is performed automatically at

•

Receiving the Calibration Signal

There are two methods you can use to receive the time calibration signal.

• If reception is not successful for any of the normal auto receive

Location

is receiving the calibration signal.

Reception is difficult and may even be impossible in the locations

described below. Avoid such locations when performing signal

reception.

• You should think of your watch operating like a radio or TV when it

To position the watch for optimum reception

time at 5:00 a.m.

do is to place it in a location that allows good reception each night.

• The watch is set up for auto receive at the factory, so all you need to

■

Remove the watch from your wrist and place it somewhere so its

top (12 o’clock side, where the antenna is located) is facing

approximately in the direction of the signal transmitter. Keep the

watch away from metal objects.

Near high-voltage lines

Among or near buildings

Next to a household appliance

Inside a vehicle

Resin band

Near mountains

or office equipment (TV, speaker ,

fax, computer, cell phone, etc.)

(automobile, train, plane, etc.)

In a location where there is

radio interference

Metal band

more difficult to receive the signal.

• Orienting the watch so it is sideways to the transmitter makes it

• Do not move the watch while it is receiving the calibration signal.

Configuring Auto Receive Settings

Use the procedure below to turn auto receive of the time

calibration signal on or off. When TYO (Tokyo) is selected as your

D button.

If you are experiencing problems with reception, move away

from the types of locations described above to a location with

better reception, and try again.

(construction site, airport, etc.)

In the Timekeeping Mode, press the

■ To view the last reception date and time

Home Time Settings”.

Home City, you can also specify the transmitter selection mode,

which controls which Japanese transmitter signal should be used

”

• This causes the display to start cycling through the “

TYO (Tokyo); Auto Receive = On; Transmitter = AUTO

for time calibration.

• For information about selecting you Home City, see “Configuring

• The initial factory default settings for auto receive are Home City =

• The following procedure can be performed only when TYO, LAX,

screen, last reception date screen, and last reception time screen

at two-second intervals.

you do not perform any operation for about one or two minutes.

• To return to the Timekeeping Mode, press the D button again.

• The watch will return to the Timekeeping Mode automatically if

— 3 —

D button.

start cycling through the last

reception date and time

screens.

Timekeeping Mode

automatically if you do not

press the

DEN, CHI, or NYC is selected as the Home City.

■ To configure auto receive settings

• This will cause the display to

1. In the Timekeeping Mode,

Last Reception

Date

perform any operation for

• The watch will return to the

Last Reception

Time

A button

about one or two minutes.

for about two seconds.

auto receive setting to flash

on the display.

• This will cause the currently

2. Hold down the

internal decoding process before updating its time setting.

Because of this, the time setting may be slightly off (within one

Time calibration signal reception is successful, but the hourly

Troubleshooting

The watch cannot receive the time calibration signal.

second).

time signal and current time are slightly off.

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

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

continually transmitted by the National Institute of Information and

Communications Technology (NICT) in theory, it may sometimes

be interrupted for periodic maintenance work, or because of

• Is the signal being transmitted?

Use the procedure under “To configure home time settings” to turn

off summer time.

Time calibration signal reception is successful, but the current

time is one hour fast.

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

lightening or other problems.

See “Reception Range” for information about areas where the

watch can receive the signal.

with reception?

• Are you within the reception range of a transmitter?

• Is there something in the immediate area that may be interfering

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

Time calibration signal reception is successful, but the current

Even if you are within the reception range of a transmitter, objects

between you and the transmitter or electrical noise can interfere

procedure under “To configure home time settings”.

time setting is wrong.

• Is the correct city code selected for your Home City?

(Los Angeles) is selected as the Home City. Select the correct

with reception. Avoid such areas during signal reception. See

“Location” for more information.

Remember that auto receive is not performed unless TYO

(Japan), NYC (New York), CHI (Chicago), DEN (Denver), or LAX

• Do you have the correct Home City code selected?

Home City code using the procedure under “To configure home

time settings”.

Use the procedure under “Configuring Auto Receive Settings” to

turn on auto receive.

• Is auto receive turned off (OFF)?

C button three

Press the

World Time Mode during the auto receive times (midnight, 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

Timekeeping Mode or World Time Mode. It is not performed if the

• Is the watch in any mode other than the Timekeeping Mode or

watch is in any other mode.

Face Illumination

Pressing the B button in any mode (except when a flashing

setting screen is displayed) illuminates the face of the watch for

Seconds

(3 times)

B button to

times to display the

flashing seconds count.

toggle the illumination

Press the

“To specify the illumination

duration” to configure the

illumination duration as

approximately 1.5 seconds or

easy reading in the dark.

3 seconds.

• You can use the procedure under

indicator)

indicator).

duration between about

1.5 seconds (

and 3 seconds

(

sunlight.

if an alarm operation starts while the face is illuminated,

Important!

• The light may be difficult to see if you turn it on under bright

• If you press a button that sounds a confirmation tone to sound or

After the setting is the way you want, press the

button to exit the setting screen.

do not perform any operation for about two or three minutes.

• The watch will also exit the setting screen automatically if you

City Code

A button

In the Timekeeping Mode,

hold down the

for about two seconds.

to flash on the display.

illumination will turn off.

receive operation is in progress.

• Illumination is disabled while a manual time calibration signal

■ To specify the illumination duration

• This will cause your city code

being performed.

accordance with the calibration signal transmitted in Japan and

the United States only. It operates like a standard (non-radio

controlled) watch outside of the range of the receivable time

calibration signal transmitters.

calibration signal for some reason, timekeeping accuracy is within

• This watch is designed to adjust its current time setting in

Timekeeping Mode or World Time Mode only.

Calibration Signal Reception

Precautions

• Auto reception can be performed while the watch is in the

• When a time calibration signal is received, the watch corrects its

±15 seconds per month.

• When the watch is unable to adjust its time signal using the

digital time setting first, and then adjusts the analog time setting

accordingly. In order to ensure that the analog time matches the

digital time, make sure you adjust the analog time to match the

digital time before signal reception is performed.

• Pressing any button while auto reception is in progress will cause

Attempting a receive operation after that causes an error.

• Strong electrostatic charge can cause timekeeping error.

• Signal reception is cancelled if an alarm starts to sound while it is

• The watch’s calendar shows dates up to the year 2099.

the watch to beep and then exit the receive operation.

transmitter before performing the reception operation. Remember

that geographic contours, nearby buildings, seasonal conditions,

the time of day, can even make reception impossible even when

you are within range of the transmitter.

• Make sure you are within the range of the calibration signal

the signal. If reception is unsuccessful, try again.

• Proper reception may be impossible if there is something blocking

Tok yo

Auto Japan transmitter select

(40kHz/ 60kHz)

are shown below. You do not need to change these settings if

you use the watch in Japan.

problems with signal reception or when the time setting produced

by signal reception is incorrect.

• The initial factory default configuration of the reception settings

• Check the auto signal reception setting whenever you have

configuring auto receive settings.

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

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

unless TYO (Japan), NYC (New York), CHI (Chicago), DEN

Auto Receive

Home City

Use the procedure under “To configure home time settings” to

(Denver), or LAX (Los Angeles) is selected as the Home City.

select your correct Home City.

available only when TYO (Tokyo) is selected as the Home City

The auto receive AUTO, 40, and 60 settings do not appear when

configuring auto receive settings.

• The AT, JP40, and JP60 transmitter selection mode options are

— 4 —

Auto switching in accordance

with signal data

ime

Summer T

code.

Use the procedure under “To configure home time settings” to

select your correct Home City.

Before going to bed at night, place the watch near a window, with

transmitter.

reception conditions are best.

its 12 o’clock position facing in the general direction of the

What time is auto receive performed?

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

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

How can I perform manual receive?

• Hold down the lower right D button for about two seconds.

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

general direction of the transmitter.

was last received successfully. To return to the Timekeeping

Mode, press the D button again.

How can I view the last reception date and time?

• In the Timekeeping Mode, press the lower right D button.

+ 12 hidden pages

Casio QW-3390, BGT-3010 Service Manual & Parts List

Specifications and Main Features

Frequently Asked Questions

User Manual