(WITHOUT PRICE)
SERVICE MANUAL
& PARTS LIST
REF. NO. S/M-597
APRIL 1998
QW-1849
MODULE NO.
R
BGX-131V
INDEX
- 1 -
CONTENTS
1. SPECIFICATIONS : QW-1849
1. SPECIFICATIONS · · · · · · · · · · · · · · · · · · · · · · · · · · 1
2. OPERATION CHART · · · · · · · · · · · · · · · · · · · · · · · · 2
3. DRAWINGS · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 4
3-1. BLOCK DIAGRAM · · · · · · · · · · · · · · · · · · · · · · · · 4
3-2. CHECKING TERMINALS AND COMPONENTS · · · · 5
4. EXPLODED VIEW · · · · · · · · · · · · · · · · · · · · · · · · · · 6
5. PARTS LIST · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 7
6. PRECAUTIONS FOR REPAIR · · · · · · · · · · · · · · · · · · 8
6-1. AC (ALL CLEAR) AND REMOVING OF MODULE · · 8
6-2. ACCURACY CHECKING · · · · · · · · · · · · · · · · · · · 8
Function
· Shock resistant
· Electro-luminescent backlight
· 1/100 sec. stopwatch
Measuring capacity: 59'59.99"
Measuring mode: Elapsed time, split time, 1st-2nd place times
Other: Auto-start function
· Countdown alarm
Input range: 1 to 60 min.
Unit: 1/10 sec.
· Regular timekeeping: Hr, min, sec, am/pm, mo, date, day
· Auto-calendar (pre-programmed until the year 2039)
· 5 daily alarms
· Hourly time signal
· 12/24-hour formats
Item
Detail
Item
Detail
Battery
CR1616
Accuracy
±15sec./month
Battery life
Approx. 24 months
Accuracy setting system Trimmer capacitor
Current consumption
1.43
µA maximum
Accuracy checking
See page 8
Alarm system
Piezo plate on Back cover
Accuracy setting
+0.25~+0.35sec./day
- 2 -
2. OPERATION CHART : QW-1849
Indication
More than
Less than
Time Up
5 minutes
5 minutes
Graphic Area
Indication
Start
5'00"0
Time Up
Beep
1 second
1 second
10 seconds
Backlight
1 second
1 second
2 seconds
COUNTDOWN ALARM MODE
The Countdown Alarm Mode has three 60-minute timers
whose starting time can be set in one-minute increments.
When the countdown reaches zero, an alarm sounds.
In the Countdown Alarm Mode, press
to illuminate
the display for about three seconds. To illuminate the
display while setting the countdown time (while the min-
utes digits are flashing), press
.
The starting times of the countdown timers are preset to
15, 30, and 60 minutes when you purchase it. You can
use these settings as they are, or you can change to
different stating times if you want.
To use a countdown timer
1. Press
while in the Countdown Alarm Mode to select the timer whose time you
want to use.
Pressing
does not change the timer selection if a countdown timer operation is
currently in progress or is paused. You must stop the ongoing countdown operation
before you can change to another timer.
2. Press
to start the countdown timer.
When the countdown reaches zero, an alarm sounds for 10 seconds or until you
stop the alarm by pressing any button. The countdown time is automatically reset to
its starting value after the alarm stops.
Press
while a countdown operation is in progress to pause it. Press
again to
resume the countdown.
To completely stop a countdown operation, first pause it (by pressing
), and then
press
. This returns the countdown time to its starting value.
To change a countdown time
1. Press
while in the Countdown Alarm Mode to select the timer whose time you
want to change.
2. After you select a timer, hold down
until the minutes digits start to flash on the
display.
3. Press
to increase the minutes. Holding down
changes the minutes at high
speed.
4. After you set the countdown time, press
to return to the Countdown Alarm Mode.
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 Countdown Alarm Mode automatical-
ly.
About countdown indicators
An audible beep, the EL backlight, and the graphic area on the display keep you
informed about the progress of the countdown as noted in the following table.
Timer 1
Timer 3
Timer 2
Graphic area
Mode indicator Timer No.
Seconds
Minutes
1/10 second
Seconds
Day
Hour
Minutes
Year
Month
Month Screen
Day of the week Screen
Day of week Day
TIMEKEEPING MODE
This section provides information on setting the time and using the backlight.
In the Timekeeping Mode, press
to switch between the day of the week and
month screens.
In the Timekeeping Mode, press
to illuminate the display for about three sec-
onds.
In the Timekeeping Mode, press
to switch between the 12-hour and 24-hour
formats.
When the 12-hour format is selected, "p.m." times are indicated on the display by P,
while "a.m." times are indicated by
. No indicators are used with the 24-hour for-
mat.
The graphic area of the Timekeeping Mode screens shows patterns that indicate
the passage of seconds.
The animation area of the Timekeeping Mode screens normally show the
(G-SHOCK) mark. Different animated figures appear at 00 and 30 seconds.
To set the time and date
1. Hold down
while in the Timekeeping Mode until the seconds digits start to flash
on the display. The seconds flash because they are
selected.
2. Press
to change the selection in the following sequence.
3. While the seconds digits are selected (flashing), press
to reset the seconds to
.
If you press
while the seconds count is in the range of 30 to 59, the seconds are
reset to
and 1 is added to the minutes. If the seconds count is in the range of 00
to 29, the minutes count is unchanged.
4. While any other digits (besides seconds) are selected (flashing), press
to in-
crease the number. Holding down
changes the current selection at high speed.
5. After you set the time and date, press
to return to the Timekeeping Mode.
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.
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 Timekeeping Mode automatically.
About the backlight
A backlight that uses an EL (electro-luminescent) panel causes the entire display to
glow for easy reading in the dark. Depending on the mode, pressing
or
turns on
the backlight for about three seconds. See the sections that cover each mode for
information on whether you should press
or
.
The backlight of the watch employs an electro-luminescent (EL) light, which loses
illuminating power after very long use.
The illumination provided by the backlight may be hard to see when viewed under
direct sunlight.
The watch will emit an audible sound whenever the display is illuminated. This is
caused by a transistor that vibrates when the EL panel lights up. It does not indicate
malfunction of the watch.
The backlight automatically turns off whenever an alarm sounds.
Month Day
Animation area
Graphic area
Press
PM indicator
Hour : Minutes
Seconds
Stopwatch Mode
Alarm Mode
Timekeeping Mode
Countdown Alarm Mode
Animation area
GENERAL GUIDE
Press
to change from mode to mode.
The animation area shows different animated characters and graphics, depending on the mode and the operation being performed.
A
- 3 -
ALARM MODE
Five independent Daily Alarms can be set. Each alarm
lets you set the hour and minutes. When the Daily Alarm
is turned on, the alarm sounds for 20 seconds at the pre-
set time each day. Press any button to stop the alarm
after it starts to sound.
When the Hourly Time Signal is turned on, the watch beeps
every hour on the hour.
In the Alarm Mode (including alarm time setting), press
to illuminate the display for about three seconds.
The graphic area in the Alarm Mode shows the current
on/off status of each of the five alarms.
To set an alarm time
1. Press
while in the Alarm Mode to select the alarm whose time you want to set.
2. After you select an alarm, hold down
until the hour digits start to flash on the
display. The hour digits flash because they are
selected.
This operation automatically turns on the alarm.
3. Press
to change the selection in the following sequence.
4. Press
to increase the selected digits. Holding down
changes the selection at
high speed.
The format (12-hour and 24-hour) of the alarm time matches the format you select
for normal timekeeping.
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. After you set the alarm time, press
to return to the Alarm Mode.
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 Alarm Mode automatically.
To turn an alarm and the Hourly Time Signal on and off
1. In the Alarm Mode, press
to select an alarm or
the Hourly Time Signal.
2. Press
to toggle the select item on and off.
The indicators ALM and
appear on the display
whenever an alarm is turned on.
The indicators SIG and
appear on the display
whenever the Hourly Time Signal is turned on.
Indicators in the graphic area of the Alarm Mode
show which alarms are turned on.
In other modes (besides the Alarm Mode), the ALM
indicator remains on the display as long as at least
one of the alarms is on, while the SIG indicator re-
mains on the display while the Hourly Time Signal
is on.
To test the alarm
Hold down
while in the Alarm Mode to sound the
alarm.
Mode indicator Alarm No.
Graphic area
Alarm on indicator
AM indicator
Hour : Minutes
Auto-start indicator
Alarm on indicator
G-SHOCK mark
Graphic area
Alarm 2 (off)
Alarm 5 (off)
Alarm 1 (on)
Alarm 4 (off)
Alarm 3 (on)
Alarm 1
Alarm 4
Alarm 5
Alarm 2
Alarm 3
Hourly Time Signal
Hour
Minutes
STOPWATCH MODE
The Stopwatch Mode lets you measure elapsed time, split
times, and two finishes. You also get Auto-Start function.
The range of the stopwatch is 59 minutes, 59.99 seconds.
In the Stopwatch Mode, press
to illuminate the dis-
play for about three seconds.
To measure elapsed time
1. Press
to start the stopwatch.
2. Press
to stop the stopwatch.
You can resume the measurement operation by press-
ing
again.
3. Press
to clear the stopwatch to all zeros.
To record split times
1. Press
to start the stopwatch.
2. Press
to display the timing up to that point. Stopwatch timing continues internally.
3. Press
to clear the split time and to continue time measurement on the display.
You can repeat steps 2 and 3 as many times as you want.
4. Press
to stop the time measurement.
5. Press
to clear the stopwatch to all zeros.
To time first and second place finishes
1. Press
to start the stopwatch.
2. Press
when the first finisher crosses the line, and record the time.
3. Press
when the second finisher crosses the line.
4. Press
to display the finishing time of the second finisher.
5. Press
again to clear the stopwatch to all zeros.
About the Auto-Start function
With the Auto-Start function, the watch performs a 5-second countdown. When the
countdown reaches zero, stopwatch operation starts automatically. During the final
three seconds of the countdown, a beeper sounds with each second.
To use the Auto-Start function
1. While the stopwatch display is showing all zeros
(
) in the Stopwatch Mode, press
.
At this time the auto-start indicator appears on the dis-
play to indicate that auto-start is on. Press
again to
turn auto-start off (indicated when the auto-start indica-
tor is not on the display).
2. Press
to start the countdown.
Pressing
also causes the countdown time to appear
on the display.
When the countdown reaches zero, a tone sounds, the backlight illuminates the
display, and a stopwatch timing operation starts automatically.
To stop the Auto-Start countdown and return to the all-zeros display, press
.
Pressing
while the Auto-Start countdown is in progress immediately start the
stopwatch.
Seconds
Minutes
1/100 second
Mode indicator
- 4 -
3. DRAWINGS : QW-1849
3-1. BLOCK DIAGRAM
XTB
BD2
1
Xtal
CT
XT
C4
BAT
KI1
KI2
KI3
KI4
VCCE
RT2
LL2
Di
EL
RT1
ENB
VCPE
CIL
ELD
GND
R
C6
VSS2
INV
LC1
LC5
L52
L3
VCH
VSS1
VSS3
LSI
LCD
TOTAL
BONDING
87PINS
83PINS
VC VCC
BD1
VDD
AC
T1
C1
C5
+
C2
C3
L1
KI6
KI7
KI8
S1
S2
S4
SA
S3
L2
1 KC1
KC2
1 KC3
1 KC4
KI5
N1
N2
N3
N4
LD
2
1
Not short (No soldering)
Not bonding
LL1
PZ
Tr
2
14C5
13C5
12C5
52C1
51C2
48C3
44C5
47C3
43C3
42C3
41C4
47C4
43C4
47C5
43C5
40C5
34C5
50C3
49C4
51C1
50C2
51C3
52C2
45C3
48C4
45C4
48C5
45C5
42C4
42C5
38C3
38C4
38C5
39C4
39C5
37C4
37C5
35C3
31C3
31C4
31C5
33C3
35C4
35C5
36C4
36C5
33C4
32C4
30C4
32C5
30C5
28C3
28C4
28C5
29C4
27C4
29C5
27C5
33C5
46C5
46C4
45C2
41C1
45C1
38C2
30C1
27C1
30C2
27C2
30C3
27C3
41C2
41C3
43C1
31C1
28C1
31C2
28C2
43C2
39C3
29C3
26C3
29C2
26C2
39C2
12C4
15C5
15C4
13C4
14C4
16C4
15
11
10
9
8
7
6
5
4
3
C5 C4 C3 C2 C1 C1 C2 C3 C4 C5
16
17
18
19
20
21
22
23
24
25
L3
L4
L5
L6
L7
L8
L9
L10
L11
L12
L13
L14
L15
L16
L17
L18
L19
L20
L21
L22
L23
L24
L25
LC1
LC2
LC3
LC4
LC5
L52
L51
L50
L49
L48
L47
L46
L45
L44
L43
L42
L41
L40
L39
L38
L37
L36
L35
L34
L33
L32
L31
L30
L29
L28
L27
L26