Citizen JN7XXX User manual

CITIZEN QUARTZ
Racing Combo
With Electroluminescence
Model No. JN7XXX
Cal. No. C401
• INSTRUCTION MANUAL
CTZ-B6783
This watch is a combination watch which has a
convenient stopwatch function for timing circuit
races and measuring competition (races). It has
EL (Electro Luminescent) that evenly illuminates the
display to make it easy to view in the dark.
EL (Electro Luminescent) Illumination
EL
Electroluminescence refers to the emission of light
by a phosphorescent substance under the influence
of an applied voltage.
The display panel of this watch provides illumination
by electroluminescence.
EL illumination
The EL panel will be illuminated under the following
circumstances:
1. When pressing button 嘷Ain time mode, or
calendar mode.
2. When displaying stop state or split time state in
chronograph mode.
3. When displaying stop state or lap time state in
race chronograph mode.
Adjusting the Analog Time
At the time adjustment position, turn the crown to
adjust the time.
Switching Functions (Modes)
Other than the time, this watch has five functions:
Calendar, Alarm, Chronograph, Race Chronograph,
and Timer.
Each time you press button 嘷Cthe mode will change.
TME: Time
CAL: Calendar
ALM: Alarm
CHR: Chronograph
RACE: Race Chronograph
TMR: Timer
If left in the alarm mode for more than 2 minutes, it
will automatically return to time mode.
Adjusting the Digital Time and Calendar
Adjusting seconds
1. In time mode, press 嘷B. For more than 2 seconds,
“second” will flash, and change to adjusting state.
2. While seconds flash, press and release button 嘷A.
to reset the seconds to 00.
Adjusting the time
1. When in the seconds adjustment state (seconds
flash), press button 嘷B, the flashing digit will
change in the order of seconds – minutes – hours
– 12/24 hour system. Select the digit you wish to
adjust.
2. Adjust the flashing digit by pressing button 嘷A.
• Press button 嘷A, the 12/24 hour will switch
alternately.
• If the time adjustment state (flashing digit)
remains for longer than 2 minutes the watch will
automatically return to normal time display mode.
• Press button 嘷Cwhile in the time adjustment state,
you can return the watch to normal display mode
(Manual return).
The analog time and the digital time can be
adjusted separately, so you can use this watch
as a dual time watch.
Adjusting the time <TME mode>

In the same way, to
make adjustments while
in the calendar mode,
press and hold button 嘷B
for more than 2 seconds
to select the digit to
adjust (will flash), then
press button 嘷Ato adjust.
• Year can be set from
1994-2099 in the
calendar.
• The day of the week will automatically be set by
adjusting the Year, Month, Date.
• When setting a date that doesn’t exist (e.g 30 Feb),
upon returning to the normal display, the first day
of the month will be displayed automatically.
• Due to the autocalendar, no adjustment at the end
of the month is required.
Using the Alarm
[ALM]
Setting the alarm
time uses the same
procedure as setting
the time and
calendar.
In the alarm mode
<ALM> press button 嘷Bto select the digit to adjust
(flashing), then set the time you wish the alarm to
sound, with button 嘷A.
• When the time mode is in the 12 hour display, the
alarm time is also in the 12 hour display, so check
the AM/PM.
• The alarm sound can be stopped by pressing any
button.
• The alarm will sound for 20 seconds.
• In the alarm mode, while pressing button 嘷A, the
alarm monitor will sound.
Alarm ON/OFF
Switch the alarm ON/OFF by pressing button 嘷A.
Chronograph Mode and Race Chronograph Mode
The differences in usages
Chronograph mode is convenient when measuring
normal production rates and split time measurements.
Race chronograph mode is convenient when
measuring each lap as in a circuit race. Two kinds of
data, the best lap time and goal time, can be called up.
For detailed usage, see explanation for each mode.
Note
Because chronograph mode and race chronograph
mode cannot be used at the same time, select one
before using.
If one of the chronograph modes is in the measuring
state or stop state (except “00 hours 00 minutes
00.00 seconds’’ display), when changing the modes,
you cannot switch to the other chronograph mode.
Split time and lap time
Split time.......an intermediate point between start
and finish.
Lap time........Time for one circuit.
Using the Chronograph [CHR]
This chronograph can measure and display a
maximum of “23 hours 59 minutes 59.99 seconds”
in increments of 1/1000 second. After completing
24 hours of measuring it will return to “00 hours
00 minutes 00.00 seconds” and stop.
Also split time (elapsed) measuring is possible.
Measurement
1. Start/Stop of
chronograph is
performed with
button 嘷A. (While
measuring, by
pressing button 嘷A,
you can repeat
start/stop as many
times as you like).
2. When stopped, press button 嘷Bto reset.
* While measuring, press button 嘷Bto display the
split time for 10 seconds.
Using the Race Chronograph [RACE]
While using chronograph, this mode cannot be used
This race chronograph can measure maximum
23 hours 59 minutes 59.999 seconds in 1/1000
second increments. After measuring 24 hours, it will
return to ““00 hours 00 minutes 00.00 seconds” then
stop. After measuring the best lap time and goal
time (total time), each can be retrieved as memo.
Accumulated elapsed time measurement
1. Start and stop with button 嘷A.
Each time it starts, the lap number gains one, and
will display a maximum of “99”. After that it will
repeat from “00”.
2. When stopped, press button 嘷Bto reset.
Note
Race chronograph starts from 00 hours 00 minutes
00.000 seconds at every starting point.
Adjusting the calendar <CAL mode>
Chronograph measurement
Race Chronograph <Lap time measurements>

Display on watch while timing
“Minutes, Seconds, 1/1000 second” will display till
60 minutes. After that it changes to “Hours, Minutes,
Seconds” display.
Measuring a series of laps
1. Start with button 嘷A.
2. While measuring, press button 嘷Bto display lap
time for 10 seconds, it will return to measuring of
the next lap automatically. (At that time, the lap
number will gain one).
3. By repeatedly pressing button 嘷Byou can
measure the lap time as many times as you like.
Each time you press button 嘷B, the lap number
will gain one, and display up to a maximum of
“99”. After that, it will repeat displaying from “00”.
4. When the last lap is measured, press button 嘷Ato
stop. Press button 嘷Bto reset.
Retrieving Memo
When measuring in race chronograph mode:
The following two types of data will be memorised
as memo. You can retrieve them after measurement
is completed.
Best lap data: The time and the lap number are
displayed at recall.
Goal time data: The time between start and finish,
and the lap number, are displayed at final stop (goal).
• While displaying memo, it is not possible to start
race chronograph.
• The memo will be deleted with the next start
operation after resetting.
Note
Memo will be deleted by the following race
chronograph start operation, or the all reset
operation, so it would pay to record the necessary
data elsewhere.
Retrieving memo
Using the Timer [TMR]
The timer can be set from 60 minutes in one minute
decrements. When timer time is up, the timer will
sound for about 5 seconds. After that it will return to
timer set time.
In timer mode, while the
set time is flashing, each
time you press button 嘷B,
the timer set time will be
reduced by one minute.
1. Press button 嘷Ato start the timer.
2. While measuring, press button 嘷Ato stop the time.
In the stop state, press button 嘷Ato start again.
3. When in stop state, press button 嘷Bto reset to
timer set time.
Timer restart function (flyback)
While using the timer, press button 嘷Bto return to
timer set time manually and restart automatically.
All Reset Operation
After replacing the battery, or when the watch’s
display malfunctions due to a strong shock (no
display, alarm continuously sounds, etc.), perform
the all reset operation as follows:
1. Pull the crown out.
2. Press the buttons 嘷A,嘷B,嘷Csimultaneously
(while you are pressing the buttons, the display
will disappear).
3. Release the buttons (all display segments will
appear).
4. Press the crown back in (at that time an alarm will
sound).
The all reset is complete. Adjust each mode
correctly before using.
EL Character Replacing EL Panel
EL panel has the following characteristics.
• When the battery voltage decreases, so will the
brightness.
• It is sensitive to dampness.
In case the watch gets wet inside, have it serviced,
as soon as possible.
• Depending on the accumulative usage time of the
EL (Emitting time), the brightness will decrease.
If the emitting display starts to go dark, and the
face becomes hard to read, take it to the shop
from which you brought it, or the nearest Citizen
Service Centre, and ask for the EL panel to be
repaired. You will be charged for the service.
Timer set
Using the timer

Precautionary Items (and usage limitations)
Water Resistance
Refer to the table for water-resistance performance
after checking the water resistance characteristics
inscribed on the face and back of the watch.
* Always set the crown in the normal position.
* While working with water and using as a water-
resistant sports watch, when the watch is dipped in
sea water or after a lot of sweat, please rinse it
well in fresh water and dry it well with a cloth.
* Leather straps have characteristics that may affect
their durability after getting wet.
* Because there is always moisture inside the watch,
when the air temperature is lower than inside the
watch, the surface of the glass may fog. If fog
remains only temporarily there is no problem, but if
it doesn’t disappear after a long period of time,
please consult the shop from which you purchased
it or a shop dealer with Citizen watches.
Temperature
• Do not expose the watch to direct sunlight or high
temperatures for a long period of time, as this may
shorten battery life.
• Do not expose to extreme cold for a long period of
time. This may reduce accuracy. Normal accuracy
returns when the watch is restored to normal
temperature.
Strong shocks
• This watch is designed to withstand external
shocks such as those associated with golfing or
playing ball.
• Avoid dropping it or subjecting it to other strong jolts.
Magnetic fields
This watch is antimagnetic up to 60 gauss and is
not affected by the magnetic fields produced by
ordinary household electric appliances. If used in
the immediate vicinity of strong magnetism, however,
the watch’s functions may be affected temporarily.
Chemicals, gas and mercury
Do not expose it to chemicals or gases. Be careful
when using chemicals. Solvents such as benzine
and paint thinner (and products containing solvents
such as gasoline, nail polish remover, certain
chemicals and adhesives) may cause discolouration,
melting and or cracking of the watch case.
Do not expose the watch to mercury, such as that
from a broken clinical thermometer, since mercury
could discolour the case, face and band of watch.
Static electricity
The integrated circuits used in the watch are
sensitive to static electricity. If exposed to intense
static electricity, the watch’s display may lose
accuracy.
Keep your watch clean
• Wipe off any dirt or water on the glass case with a
soft cloth.
• Since the band is in constant contact with your
skin, always keep it clean.
A dirty band may cause a slight reaction in people
with sensitive skin.
• Always keep the band clean of any dust or dirt.
Dust and dirt on the band may stain the shirt sleeve.
Metal watch bands: Metal watch bands can be
cleaned with a toothbrush, soap, and water.
Leather bands: Wipe off the front side of the band
with a soft dry cloth, and remove stains on the back
side of the band with a cloth moistened with alcohol.
Plastic or rubber bands: Wash in water. (Avoid
using solvents as they may cause the band to
dissolve.)
Be sure to keep the batteries out of reach of
infants and small children. Should accidental
ingestion occur, consult a doctor at once

Specifications
1. Caliber No... C401
2. Type... Combination (Analog & Digital) quartz
watch
3. Time accuracy... (5⬚C-35⬚C/41⬚F-95⬚F) within
Ⳳ20 seconds/month
4. Operation temperature range... 0⬚C-55⬚C/
32⬚F-131⬚F
5. Available functions... Time: Hour, Minutes,
Seconds
Calendar: Year, Month,
Date, Day of the week.
Daily Alarm:
Chronograph: 24 hour
measurement (1/1000
second increments) split
time.
Race chronograph:
24 hour measurement
(1/1000 second
increments) lap time,
memo function.
Timer: 60 minute
countdown (One minute
decrements)
6. Additional functions... EL illumination function
7. Battery... No. 280-44 Code SR927W
8. Battery life... Approx. 2 years (alarm sound
20 seconds/day, timer time up
sounds 5 seconds/day, EL
illumination 3 seconds/day)
Note:
Battery life will maintain stable accuracy for about
2 years under normal conditions (as in above
conditions) after installing a new battery.
However the battery life will change depending on
the frequency that the alarm, chronograph and EL
illumination are used.
The above specifications may be changed due to
improvements, without notice.