Casio 785 Owner's Manual

OPERATION CHART:MODULE QW-785

• Press B to change from mode to mode.

GENERAL GUIDE

Timekeeping Mode

A

B

P

Time

C

Press

C

Date

B

B

TIMEKEEPING MODE

• In the Timekeeping Mode, press C to switch be­tween time and date displays.

P

C

B

PM
indicator

A

Seconds

Minutes

C

To set the digital time and date

1. In the Timekeeping Mode, hold down A until the
“On” or “OFF” message appears on the display.

2. Press B to change the selection in the following
sequence.

P

press

Hour

Month

Language

(English or

German)

Year Minute Hour Second

12/24-hour D.S.T. on/off

Auto Receive

on/off



Date

• See “Time Calibration Signal” for details on auto receive.

3. Press C to switch the day of the week display between English (E) and German (D).

• See the table titled “Day of the week abbreviations” for the meanings of the indica­tors that appear on the display.

4. While the 12/24-hour setting is selected, press C to switch between the two formats.

5. While the D.S.T.(daylight saving time) on/off setting is selected, press C to switch
between daylight saving time and standard time.

• The display shows “On” and the indicator “DST” appears on the display when daylight
saving time is switched on.

6. While the seconds digits are selected (flashing), press C to reset the seconds to “00”.
If you press C while the seconds count is in the range of 30 to 59, the seconds are
reset to “00” and 1 is added to the minutes. If the seconds count is in the range of 00
to 29, the minutes count is unchanged.

7. While the hour, minutes, year, month and date digits (besides seconds) are selected
(flashing), press C to increase the number. Holding down C changes the current
number at high speed.

8. After you finish making all the settings you want, press A to return to normal time­keeping.

• If you do not operate any button for a few minutes while a selection is flashing, the
flashing stops and the watch goes back to the normal timekeeping automatically.

• The day of the week is automatically set in accordance with the date.

• The date can be set within the range of January 1, 1995 to December 31, 2039.

• When you use the above procedure to set the time on the digital display, the hands of
the analog timepiece normally adjust according to your setting. If, for any reason, the
analog time does not match the digital time, use the procedure described under Hand
Setting Mode to match the analog setting with the digital display.

About daylight saving time

With daylight saving time (summer time), clocks are set one hour later in order to better
take advantage of daylight hours during the summer, when days are longer. Whether or
not daylight saving time is used depends on the country you are in.

Day of the week abbreviations

Day of week

Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday

Language

English

SU
MO
TU
WE
TH
FR
SA

German

SO
MO

DI

MI
DO
FR
SA

HAND SETTING MODE

Use this mode to make corrections when the time shown
on the digital display does not match the time indicated
by the analog hands.

A

Important:

Before performing the time calibration operation, be

B

Mode indicator

sure to synchronize the digital time with the analog

C

time using the procedures described below. If not, the
setting of the hands could result in being different from
the digital time which is changed by the calibration
signal.

— 1 —

Telememo Mode

B

Hand Setting Mode Alarm Mode

B

World Time Mode

P

B

To set the analog time

1. Hold down A while in the Hand Setting Mode until the digits start to flash on the
display.

2. Hold down B or C to move the hands of the analog timepiece.

3. After you set the analog time, press A to return to the Hand Setting Mode (the
flashing stops).

The following shows how the display automatically changes if you do not operate any
button for a few minutes while in the Hand Setting Mode.

Hand time

setting

(flashing)

A few

minutes

Normal Hand
Setting Mode
(not flashing)



A few

minutes

Timekeeping display

TIME CALIBRATION SIGNAL

This watch is designed to receive the time calibration signal transmitted from Frankfurt,
Germany. It automatically adjusts its current time setting in accordance with the signal it
receives. There are two different methods you can use for signal receipt. With auto
receive, the watch automatically receives the calibration signal twice each day and
makes appropriate adjustments. You can also use manual receive, where you perform
a specific button operation to receive the calibration signal.

• The current time setting in accordance with the 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, 1995 to December 31, 2039. Setting of the date by the calibration
signal cannot be performed starting from January 1. 2040.
This watch can receive signals that differentiate between leap years and non-leap years.

•

How the analog hands react on the time calibration

After the watch successfully receives time calibration signal data, it automatically changes
the settings of its hands. Before performing the time calibration operation, be sure to
synchronize the digital time with the analog time using the procedures described under
“Hand Setting Mode”. If not, the setting of the hands could result in being different from
the digital time which is changed by the calibration signal.

Auto receive

When auto receive is switched on, the watch automatically receives the calibration signal
starting from when the digital time reaches 2:00 AM and 4:00 AM each day. Calibration
is performed regardless of what mode the watch is in, except when you are performing a
data input or time setting operation (indicated by the flashing display). Use the following
procedure to switch auto receive on and off.

To switch auto receive on and off

1. In the Timekeeping Mode, hold down A until the “On” or “OFF” message appears on
the display.

2. Press C to switch auto receive on and off.

Press

Receive indicator

Flashes when calibration signal is being received.

3. Press A to return to the Timekeeping display.

• Auto receipt of the calibration signal is designed to be performed early in the morning,
while you sleep (provided that the digital time is set correctly). Before going to bed for
the night, remove the watch from your wrist, and put it in a location where it can easily
receive the signal. You should also orient the watch properly for best reception. See
“Tips for ensuring best reception” for details.

• Auto receive is switched on when the watch is shipped from the factory.

• The receive indicator appears on the display when the calibration signal is received
successfully. It disappears from the display when the watch is unable to receive the
signal for some reason. You can tell whether the last time the watch tried to receive
the calibration signal was successful or not by checking the receive indicator.

How the auto receive time calibration is performed

• When auto receive is switched on, the watch receives the calibration signal for two to
six minutes each day when the digital time reaches 2:00 AM and 4:00 AM (calibration
times). Make sure you do not try to operate any of the watch’s buttons while the
calibration signal is being received. Doing so can interfere with correct calibration.

• Remember that receipt of the calibration signal depends on the time shown on the
digital display. The receive operation will be performed whenever the digital display
shows 2:00 AM and 4:00 AM, regardless of whether or not that is actually the correct
time.

2:00 AM 4:00 AM

2 to 6 minutes

< First receipt >

• When both receipts are successful, the watch uses the data of the second receipt for
calibration. When only one receipt is successful, the watch uses the data of the
successful receipt.

C

< Second receipt >

2 to 6 minutes

Manual receipt

While in the Timekeeping Mode, hold down C for three
or four seconds.

• When performing reception of the calibration signal,
make sure that the antenna located at the 12 o’clock

Signal being received

• The normal timekeeping display should appear within two to six minutes, which is how
long it takes for a signal receive operation. If a problem occurs during the operation,
the message “Err” appears on the display for about five seconds before the watch
returns to normal timekeeping.

• The receive indicator appears on the display when the receive operation is concluded
successfully.

• You can interrupt a receive operation at any time by pressing C. If you do, the watch
returns to normal timekeeping, without the receive indicator on the display.

edge of the watch is facing in the proper direction.
See “Tips for ensuring best reception” for de-
tails.

Last signal receipt display

Holding down B for a few seconds in any mode displays the date and time of the last
successful receipt. Press any button to return to normal timekeeping. The watch auto­matically changes back to normal timekeeping if you do not press any button for about 10
seconds.

Month

Date Day of week

Hour Minutes

Tips for ensuring best reception

< Location >

• Reception of the calibration signal is difficult when the watch is located indoors. Move
the watch so it is as near to a window as possible.

• The followings are locations where reception is bad.

Nearby TVs, refrigerators, computers, or other household appliances
Far away from broadcasting stations, among ferro-concrete structures or near moun­tains
Underground, in tunnels or in ferro-concrete buildings
Near high-tension wires, neon signs, or radio stations whose frequencies interfere
Near railroads, highways or airports
In trains or cars

< Orientation >

This watch is designed to receive a signal emitted from Mainflingen, which is located 25
kilometers southwest of Frankfurt, Germany. This means that reception is best when the
antenna built into the 12 o’clock edge of the watch is facing towards Mainflingen. Note,
however, that moving the watch while the calibration signal receive operation is taking
place will make stable reception impossible.

Antenna built in here

P

Point towards Mainflingen

Reception range

This watch is able to receive the calibration signal within
the area represented by a circle (left figure) with a
radius of 700 ~ 800 kilometers, centered on Mainflingen.

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

Note

• Even when the watch is within the reception range,
calibration signal reception will be impossible if the
signal is blocked by mountains or other geological
formations between the watch and signal source.

• At long distances that are out of the line of sight of

Frankfurt

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.

the calibration signal transmitter, the calibration sig­nal is bounced off of the ionosphere. Because of

TELEMEMO MODE

The following causes all data stored in memory to be deleted. Be sure to always keep separate
written copies of all important data.

• Malfunction or repairs

• Dead battery

• Battery replacement
In no event will CASIO be liable for loss of data or any damages arising out of such loss.

Mode indicator

BC

• If the new data display does not appear, it means that memory is full. To store more
data, you first have to delete some of the data.

2. Hold down A until the flashing cursor appears on the display.

3. Press B to move the flashing cursor in the following sequence.

Name
(up to 4 characters)

The Telememo Mode lets you store up to 30 pairs of
name and telephone number data. Data is automati­cally sorted into alphabetic order based on the name
data.

A

To input Telememo data

1. In the Telememo Mode, press C until the new data
display appears (left figure).

• If there is no Telememo data stored in memory yet,
the new data display appears as soon as you enter

New data
display

the Telememo Mode.

First 6 telephone
number digits

Last 6 telephone
number digits

4. While the cursor is flashing in the name display, use C to input letters. Each press of
C changes the character at the cursor location in the following sequence.

Press

Space(@ )

n 

Letters (A to Z)

C

Press

5. When the character you want to input is at the cursor location, press B to move the
cursor to the right.

6. Repeat steps 4 and 5 to input all the characters of the name.

• The name can be up to 4 characters long.

7. After you input the name, move the cursor to the number display.

8. Use the same procedure as in steps 4 and 5 above to input the telephone number.

• In this case, each press of C changes the character at the cursor in the following
sequence.

Press

Hyphen (–)

C

Numbers (0 to 9)

Press

• The telephone number can be up to 12 digits long.

9. After inputting all the data you want, press A to store it.

• The message “SORT” appears for about three seconds to indicate that data is being
sorted into alphabetical order according to the names. After the sort operation is
complete, the display returns to the normal Telememo Mode display.

• All of the Telememo data for each item cannot appear on the display at one time. For
details on how data appears on the display, see “How the Telememo Mode displays
data.”

• If you do not operate any button for a few minutes while the cursor is flashing on the
display, the watch automatically returns to the normal Telememo Mode display (with­out a cursor).

Press

C

Hyphen (–)

C

Press

C

n 

Space(@ )

C

How the Telememo Mode displays data

All of the Telememo data for each item cannot appear on the display at one time, so the
display automatically changes in the following sequence.

Name

To scroll through Telememo data

In the Telememo Mode, press C to scroll forward through stored data.

• If the new data display does not appear, it means that memory is full.

• The data item that is displayed when you exit the Telememo Mode will be the first data
to appear when you enter the Telememo Mode again.

First 6 telephone

number digits

Last 6 telephone

number digits

To edit Telememo data

1. In the Telememo Mode, scroll through the data items and display the one you want to
edit.

2. Hold down A until the flashing cursor appears on the display.

3. Use B to move the cursor to the character you want to change.

4. Use C to select the character you want.

• See steps 4 through 8 under “To input Telememo data” for details.

5. After editing the data, press A to store it.

• The message “SORT” appears for about three seconds to indicate that data is being
sorted into alphabetical order according to the names. After the sort operation is
complete, the display returns to the normal Telememo Mode display.

• If you do not operate any button for a few minutes while the cursor is flashing on the
display, the watch automatically returns to the normal Telememo Mode display (with­out a cursor).

To delete a Telememo item

1. In the Telememo Mode, scroll through the data items and display the one you want to
delete.

2. Hold down A until the cursor appears on the display.

3. Hold down B and C until the message “CLR” appears on the display.

• “CLR” indicates that the item is deleted. Next, the new data display appears, without a
cursor.

• If you want to input more data, start from step 2 under “To input Telememo data”.

WORLD TIME MODE

Use the World Time Mode to find out the current time
in any one of 26 time zones around the world.
When you set the time for any time zone, all other
zones are adjusted accordingly.

A

• In the World Time Mode, the display automatically
switches between the city code and the time in that

B

City code

Current time in New York
whose city code is "NYC".

To set the World Time

T

S

D

Indicates daylight saving
time is on.

2. Hold down A until the DST on/off indicator (“On” = on / “OFF” = off) begins to flash on
the display because it is selected.

3. Press B to change the selection in the following sequence.

C

Mode indicator

P

zone.

• For full information on city codes, see the “City Code
Table” at the end of this manual.

1. In the World Time Mode, scroll through the World
Time Zones by pressing C to find the time zone
whose time you want to set.

• The time zone that is displayed when you leave the
World Time Mode will still be displayed when you
enter the World Time Mode again.

Cursor

— 2 —

DSTon/off

Hour

Minutes