Casio QW-2812 Service Manual & Parts Manual Download Page 6

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3. Press 

C

 to move the flashing between the hour and minute settings.

4. While a setting is flashing, use 

D

 (+) and 

B

 (–) to change it.

• 

When setting the alarm time using the 12-hour format, take care to set the time
correctly as a.m. (A indicator) or p.m. (P indicator).

5. Press 

 to exit the setting screen.

Alarm Operation

The alarm sounds in all modes at the preset time for about 10 seconds, or until you
stop it by pressing any button.

To test the alarm
In the Alarm Mode, hold down 

D

 to sound the alarm.

To turn an alarm and the Hourly Time Signal on and off
1. In the Alarm Mode, press 

D

 to select an alarm or the Hourly Time Signal.

2. When the alarm or the Hourly Time Signal you want to set is selected, press 

A

 to

turn it on and off.

Data Memory

You can use the watch’s data memory to store e-mail
addresses, Web page URLs, and other text data.

• 

All of the operations in this section are performed in the
Data Memory Mode, which you enter by pressing 

C

.

Data Memory Records

Each data memory record can contain up to 63
characters. Records are stored in memory in the
sequence they are created.

• 

The number of records you can store in data memory
depends on the number of characters that make up
each record. See “Data Memory Management” for more
information.

Timekeeping
Mode time

Text

Record number

To create a new data memory record

1. In the Data Memory Mode, press 

A

 and 

D

 at the

same time to display the remaining memory screen.

• 

You do not have to perform the above step if the
remaining memory screen is already on the display.

• 

If 0% is shown for remaining memory, it means that
memory is full. To store another record, you will first
have to delete some of the records stored in memory.

2. Hold down 

A

 until the flashing cursor appears on the

display, which indicates the setting screen.

3. Use 

B

 and 

D

 to cycle through characters at the

current cursor location, and 

C

 to move the cursor to

the right. See “Inputting Text” for more information.

• 

If memory becomes full while you are inputting text,
the cursor will jump to the first (leftmost) character of
the text when you press 

C

, instead of advancing to

the right.

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Cursor

4. Press 

A

 to store your data and return to the data

memory record screen (without the cursor).

• 

The message SET appears for about two seconds,
followed by a data memory record screen, which shows
the text you just input, along with a record number
automatically assigned by the watch.

Timekeeping
Mode time

Text

Record number

To recall data memory records
1. In the Data Memory Mode, press 

D

 to scroll forward through data memory records.

• 

Each press of 

D

 advances to the next record and shows its record number and

first three characters of its text.

• 

Pressing 

D

 while the last record in memory is on the display changes to the

remaining memory screen. Pressing 

D

 again displays the first record.

2. Use 

A

 to scroll through the text, three characters at a time.

• 

An end mark indicates the end of the text.

First three characters

Second three characters

End mark

Each press of 

A

 shows the next three characters.

▲ 

To edit a data memory record
1. In the Data Memory Mode, display the record you want to edit.
2. Hold down 

A

 until the flashing cursor appears on the display.

3. Press 

C

 to move the flashing to the character you want to change.

4. Use 

D

 and 

B

 to change the character.

5. After making the changes you want, press 

A

 to store them and return to the data

memory record screen.

To delete a data memory record
1. In the Data Memory Mode, display the record you want to delete.
2. Hold down 

 until the flashing cursor appears on the display.

3. Press 

B

 and 

D

 at the same time to delete the record.

• 

The message CLR appears to indicate that the record is being deleted. After the
record is deleted, the cursor appears on the display, ready for input.

4. Input data or press 

A

 to return to the remaining memory screen.

Stopwatch

The stopwatch lets you measure elapsed time, split times,
and two finishes.

• 

The display range of the stopwatch is 99 minutes, 59.99
seconds.

• 

The stopwatch continues to run, restarting from zero
after it reaches its limit, until you stop it.

• 

Exiting the Stopwatch Mode while a split time is frozen
on the display clears the split time and returns to
elapsed time measurement.

• 

The stopwatch measurement operation continues even if
you exit the Stopwatch Mode.

• 

All of the operations in this section are performed in the
Stopwatch Mode, which you enter by pressing 

C

.

Timekeeping
Mode time

Minutes

1/100 second

Seconds

D

Start

Stop

Elapsed Time

➤ 

Re-start

Clear

D

➤ 

Stop

D

➤ 

D

➤ 

Split Time

D

Start

Split
(

,

flashes)

➤ 

Split release

Clear

➤ 

Stop

➤ 

D

➤ 

A

Two Finishes

D

Start

Split

➤ 

Stop

Clear

➤ 

Split release

D

➤ 

➤ 

A

First runner
finishes.
Display time of
first runner.

Second runner
finishes.

Display time of
second runner.

To measure times with the stopwatch

Illumination

The watch has an EL (electro-luminescent) panel that
causes the entire display to glow for easy reading in the
dark.

• 

See “Illumination Precautions” for other important
information.

To turn on illumination
Press 

B

 in any mode to illuminate the display.

• 

You can specify 1.5 seconds or 2.5 seconds as the
illumination duration. See “To set the current time and
date manually” for more information.

Battery

This watch is equipped with a solar cell and a rechargeable battery (secondary
battery) that is charged by the electrical power produced by the solar cell. The
illustration shown below shows how you should position the watch for charging.

Example: Orient the watch so its face

is pointing at a light source.

• 

 The illustration shows how to position

a watch with a resin band.

• 

 Note that charging efficiency drops

when any part of the solar cell is
blocked by clothing, etc.

• 

Normally, you should try to keep the
watch outside of your sleeve as much
as possible. Charging is significantly
reduced if the face is only partially
covered.

Solar cell

Important!

• 

Storing the watch for long periods in an area where there is no light or wearing it in
such a way that it is blocked from exposure to light can cause rechargeable battery
power to run down. Make sure that the watch is normally exposed to bright light
whenever possible.

• 

Normally, the rechargeable battery should not need replacement, but after very long
use over a number of years, the rechargeable battery may lose its ability to achieve
a full charge. Should you notice problems with getting the rechargeable battery to a
full charge, contact your dealer or CASIO distributor about having it replaced.

• 

The rechargeable battery should be replaced with a CASIO-specified CTL1616
battery only. Other rechargeable batteries can cause damage to the watch.

• 

All data stored in memory is deleted, and the current time and all other settings
return to their initial factory defaults whenever battery power drops to Level 4 and
when you have the battery replaced.

• 

Turn on the watch’s Power Saving function and keep it in an area normally exposed
to bright light when storing it for long periods. This helps to keep the rechargeable
battery from going dead.

Function Status

All functions enabled.

All functions enabled.

Auto and manual receive,
alarm, hourly time signal,
illumination, and display are
disabled.

All functions, including
timekeeping, disabled.

Battery Power Indicator and Recover Indicator

The battery power indicator on the display shows you the current status of the
rechargeable battery’s power.

Level

1

2

3

4

Battery Power
Indicator

(Charge Soon Alert)

Battery indicator

Recover indicator

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Summary of Contents for QW-2812

Page 1: ...SERVICE MANUAL PARTS LIST WITHOUT PRICE QW 2812 MODULE NO R REF NO S M 848 FEB 2004 WVH 500D Ver 1 Apr 2004 ...

Page 2: ...GRAM 7 3 2 CIRCUIT DIAGRAM 8 3 3 CHECKING TERMINALS AND COMPONENTS 9 4 EXPLODED VIEW MODULE QW 2812 10 5 PARTS LIST MODULE QW 2812 11 6 PRECAUTIONS FOR REPAIR MODULE QW 2812 6 1 AC ALL CLEAR AND REMOVING OF MODULE 12 6 2 ACCURACY CHECKING 12 6 3 SOLAR CELL PCB ASS Y CONTACT CHECKING 13 7 TROUBLESHOOTING MODULE QW 2812 14 ...

Page 3: ...te time received display Time Calibration Signal Receivable Time Calibration Signals Mainflingen Germany Call Sign DCF77 Frequency 77 5kHz e DATE MEMORY Meomory capacity Up to 40 records for Internet access codes and other data when there are 7characters per record actual number of records depends on the number of characters per record World Time 29 time zones 30 cities daylight saving time on off...

Page 4: ... watch in an area that is outside of the range of the transmitter in Mainflingen you need to manually adjust the time as required See Timekeeping for information about manual settings To set your Home City 1 In the Timekeeping Mode hold down A until the city code starts to flash which indicates the setting screen 2 Use D east and B west to select the city code you want to use as your Home City The...

Page 5: ... ERR appears on the display for about one or two minutes After that the watch returns to the Timekeeping Mode You can also change from the last signal or ERR screen to the normal timekeeping screen by pressing D To turn auto receive on and off 1 In the Timekeeping Mode hold down A until the city code starts to flash which indicates the setting screen 2 Press C twice to move the flashing to the aut...

Page 6: ...e CLR appears to indicate that the record is being deleted After the record is deleted the cursor appears on the display ready for input 4 Input data or press A to return to the remaining memory screen Stopwatch The stopwatch lets you measure elapsed time split times and two finishes The display range of the stopwatch is 99 minutes 59 99 seconds The stopwatch continues to run restarting from zero ...

Page 7: ...this World Time Mode times will not be correct if you do not select the proper Home City code before setting the time and date in the Timekeeping Mode To set the current time and date manually 1 In the Timekeeping Mode hold down A until the city code starts to flash which indicates the setting screen 2 Use A or C to move the flashing in the sequence shown below to select other settings City code S...

Page 8: ... 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...

Page 9: ...Y0 X5Y0 X6Y0 X7Y0 X8Y0 X14Y1 X13Y1 X12Y1 X11Y1 X10Y1 X9Y1 X0Y1 X1Y1 X2Y1 X3Y1 X4Y1 X5Y1 X6Y1 X7Y1 X8Y1 X14Y2 X13Y2 X12Y2 X11Y2 X10Y2 X9Y2 X0Y2 X1Y2 X2Y2 X3Y2 X4Y2 X5Y2 X6Y2 X7Y2 X8Y2 X14Y3 X13Y3 X12Y3 X11Y3 X10Y3 X9Y3 X0Y3 X1Y3 X2Y3 X3Y3 X4Y3 X5Y3 X6Y3 X7Y3 X8Y3 X14Y4 X13Y4 X12Y4 X11Y4 X10Y4 X9Y4 X0Y4 X1Y4 X2Y4 X3Y4 X4Y4 X5Y4 X6Y4 X7Y4 X8Y4 LC2 LC1 L38 L3 L4 L5 L6 L7 L8 L9 L10 L11 L12 L13 L14 L15 ...

Page 10: ...sed in this module LSI TOTAL 106PINS BONDING 81PINS GND VDD2 BAT VCH VDD3 VC1 VC2 C3 C2 C5 XTB Xtal L3 L38 LC1 LC5 LCD 2 8V 1 3b 1 5d LD1 S1 VDD1 C1 BD C8 LL1 Tr1 XT T1 T2 T3 KI1 KI2 KI3 KI4 KI5 KI6 KI7 KI8 KI9 S2 SCR SCIN RP1 RP2 Cp PZ VDSP C4 VC3 VC4 Di1 VHF C6 AC T4 KC4 KC3 KC2 KC1 R1 R2 VSC C7 SC C9 R3 Z VPM Di2 R1 Rb GNDB S3 S4 SDO SCK CSB SDI N1 N2 Cxt Rxt2 Ccp Cbat Rbat Xtal2 ISB ANT Rcp Rx...

Page 11: ... CLF1 KI3 KI3 VOUT R2 LD1 VSC R3 KI9 KI2 KI3 VDSP SD0 VC1 P14 VCH R1 GND P2 P1 VDD2 KI1 KI4 FET S AC KC1 Transistor Tr1 Inverter INV Resistor Chip RP1 Resistor Chip RP2 Coil LL2 Coil LL1 Capacitor Chip Cel Xtal1 4 Oscillator Crystal 7110 6336 Xtal2 Oscillator Crystal Resistor Chip Rxt2 Varistor Z Resistor Chip R1 Capacitor Chip C8 Capacitor Chip C9 Capacitor Chip C1 Capacitor Chip C2 Capacitor Chi...

Page 12: ...1014 2487 19 1008 2129 9 1013 5138 13 7207 8349 14 7207 8470 16 1013 5139 20 1013 5135 17 1013 5134 12 7228 0364 15 1013 4221 11 1014 0782 14 7207 8470 14 7207 8470 5 1006 5657 Battery Storage CTL1616 2 1013 5055 21 1013 5136 8 1013 5052 18 1000 3815 7 1008 2184 6 1009 7687 ...

Page 13: ...LATOR CRYSTAL CFS 145LM07 QW 2812YC 01 1 B 5 1006 5657 BATTERY STORAGE CTL1616 QW 2812YC 01 1 B 6 1009 7687 CUSHION 2549 Q470646 1 QW 2812YC 01 1 C 7 1008 2184 CUSHION 2709 2 Q469841 1 QW 2812YC 01 1 C 8 1013 5052 CUSHION 2815 RJQ515128 001V01 QW 2812YC 01 1 C 9 1013 5138 HOLDER RJQ514979 001V01 QW 2812YC 01 1 C 10 1014 2487 INTERCONNECTOR RJQ517008 001V01 QW 2812YC 01 1 C 11 1014 0782 LABEL RJQ51...

Page 14: ... switching the module to ACCURACY CHECKING MODE The operations are shown below A SWITCHING TO ACCURACY CHECKING MODE While pressing the D button press A and C buttons 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 CHEC...

Page 15: ...e 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 88 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 Pres...

Page 16: ...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 Replace the Case center ass y with antenna Signal reception OK OK OK OK ...

Page 17: ...CASIO TECHNO CO LTD Overseas Service Division 6 2 Hon machi 1 Chome Shibuya ku Tokyo 151 8543 Japan Ver 1 Apr 2004 Addition of pages 2 3 4 5 and 6 ...

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