Citizen 8980, 8981, 8982 Technical Information

TECHNICAL
INFORMATION
CITIZEN QUARTZ
Cal. No. 898
[CAL. 8980/8981] [CAL. 8982]
OCITIZEN
CITIZEN 1S A REGISTERED TRADEMARK OF CITIZEN WATCH CO., JAPAN.
ml
m2.
m3.
m4.
mb.
=e.
=.
mg.
"1.
m2.
CONTENTS
Page
OUT LINE ee, 1
FEATURES ...... aaa anana nen aaonererenenenrenare na 1
SPECIFICATIONS ...... aaa aa anadenerdearenedranaonnarna 3
HANDLING INSTRUCTIONS sec 4
NOTES ON MEASUREMENT OF TEMPERATURE ......... i, 14
DISASSEMBLY/ASSEMBLY OF MODULE ...... a 15
NOTES ON ASSEMBLY/DISASSEMBLY ie 17
TROUBLESHOOTING AND ADJUSTMENT iis 19
OUTLINE
The quest for a combination watch having multiple functions gave birth to these watches.
By adding a thermometer and a 1/1000 sec. stopwatch both digitally displayed, and also including
two step motors in the analog section, even more functions became available in these watches.
They are known as Caliber 8980, 8981 and 8982. The first two have a temperature sensor located
near the crystal glass. The last one's temperature sensor is placed inside the case at the bottom of
the face at 6 Hour mark.
This is a sporting watch with water-resistance up to 10 atmospheres of pressure.
FEATURES
a) Thermometer system
A high-accuracy thermistor thermometer is incorporated. The resolution of measurement is
0.1°C or 1°F along with a centigrade-Fahrenheit switching function (with Cal. No. 8980 only).
Furthermore a “temp. Memory” functions to store the temperature every day at a certain
moment of time.
b) Twin analog watches
Two analgo watches are available with two hands and a single hand respectively owing to the
use of two step motors.
The single-hand analog watch is capable of various standard indications plus a second indication.
c) 1/1000 sec. stopwatch
A 1/1000 sec. stopwatch is incorporated for the first time among Citizen digital watches.
( 898* )
m3. SPECIFICATIONS
Caliber No. 8980-04 8981-04 | 8982-04
Type Combination quartz watch
Size of module (mm) 26 x 26 x 4.05t (Power cell part 4.28t)| 27.4 x 31.2 x 4.051 (Power cell part 4.281)
Accuracy +15 sec./month at normal temperatures
Oscillation 32,768Hz
Display method FE-type nematic LC (liquid crystal) & 3-split multiplex drive
Converter Bipolar step motor
Integrated circuit C/MOS—LSI (1 unit)
Effective temp. range —10°C ~ +60°C (14°F ~ 140°F)
Adjustment of time rate By trimmer condenser
Normal time AM/PM, hour, minute & second
Calendar Day, date & temp. (See thermometer.)
(Measurement of temp.)
с Alarm (Temp. memory) AM/PM, hour, minute & storage of temp.
o Dual time AM/PM, hour, minute, second & L (Local time mark)
= Stopwatch Hour (2nd analog): minute, second & 1/100 sec.
2 (Unit time of measurement: 1/100 sec. with 12-hour display)
= Chime Display of set mark only
1st analog Hour & minute
2nd analog Second, alarm & dual time with operation of push-buttons in modes
excepting stopwatch mode
Additional functions ® Fully automatic calendar (1980 ~ 2019)
® Power cell life indicator
® Electromagnetic correction system
e ||lumination lamp
e Alarm monitor
e 12/24 hour switching function
e Instant manual return
e Auto-return
Power cell (Silver oxide) Parts No. : 280-30 (1 unit), Ag, O/KOH
Cell code : SR1120W
Voltage : 1.65V
Capacity : 55mAH (High capacity product)
Size (mm) : 11.6% x 2.11
Lifetime : About 2 years
(20 sec. alarm, 24 hourly chimes & 3 sec. illumination of
lamp per day in second mode of 2nd analog)
Sensor part Use of thermistor
Measurement range of —0.9°C ~+59.9°C (14°F ~ 139°F)
5 temp.
© | Accuracy +1°C (+2°F) at 20°C ~ 30°C (36°F ~ 86°F)
2 +2°С (+4°F) at —56°C ~ +40°C (23°F ~ 104°F)
S | Resolution 1.0°C (1°F)
-- . .
Others Centigrade-Fahrenheit switching . Measurement sampling time
function & measurement sampling switching function (Cal. 8981)
time switching function (Cal. 8980/8982)
Remarks Product code No.: A (Reflecting plate is (silver color)
B (Reflecting plate is (gold color)
* Cal. No. 8981 lacks only the Centigrade—Fahrenheit switching function compared with Cal. No. 8980.
898 )
m4. HANDLING INSTRUCTIONS
(Note: The circle marks in the following diagrams show the flashing.)
4.1 Nomenclature and functions of push-buttons
[CAL. 8980/8981]
1st analog watch
2nd analog watch
o”
Digital mode mark — 2nd analog mode mark
—_— LA
P
cod”
cul PISE 3
Alarm set mark и
[CAL. 8982] Temp. sensor \ Chime set mark
[\
analog watch
ihe
1st analog watch
Digital mode mark
Alarm set A
Temp. sensor Chime set mark
2nd analog mode mark
®
(M) button: Switching of mode & instant manual return
© button: Selection of digit for correction, switching of 2nd analog mode & start/stop
(stopwatch)
® button: Correction, alarm ON/OFF, switching of sampling time for temp. measure-
ment (1 sec./1 min.), lap & reset (stopwatch)
(© button: Illumination lamp
4-2. Switching of 2nd analog mode
The 2nd analog modes are switched as follows excepting the stopwatch mode.
O)
8
от CITIZEN 7
$ SY A2PSEC ALM DUT STW
DATE DI
EJ ALM
DS Г
CT UA
. [ape РИ ОН);
- ®
T TEMP q
= °C/F
171000
SEC
TIM
v
ON id
со НЫНЕ Dual time
mode mark
= [| Second
mode mark (
—/
Second display
Approx. alarm set time display Approx. local time display
*¥ Thic ic a ewitchinan examnle an the time disnlav.
4-3. Switching of digital modes
CITIZEN
ALM DUT STW
Tr
m (LO |);
LAP/RESE
DATE DU
т
TME| ALM | STW A 2W SEC AM DUT STW
CITIZE
DATE ouT
WE] AM | STW 4 2B sec ALM DUT STW
‚ Тени
a =
\
D
с
сх
ose
CITIZEN
ALA JE
E
TEMP ‘ с ©
*C/F El
171090
SEC
DATE DUT CITI
TEL AM | STW A 2b sec ALM DUT STW
Cd. 8.1
amic" E
ZEN
a
3 Js
AEE |
x
2
=
с
о
D
с
се
DATE ouT
TMEL AM | STW A 29 SEC ALM OUT STW
CITIZE
Aan”
LILA 5
Y
w
ne [ra Má
1000 LA RS ÁS
( 898 )
JO) — Switching of 2nd analog mode (See preceding 4-2.)
Time display
O JB Switching of 2nd analog mode
Calendar display
(Thermometer display)
O — > Switching of 2nd analog mode
Alarm display
(Temp. memory display)
O amm SWitching of 2nd analog mode
Dual time display
Hour display (Stopwatch)
Stopwatch display
(898: )
4-4. Time setting procedure
1 second or longer ©)
Time display
e A time setting mode is obtained by pushing (9)
button 1 second or longer. The second can be for-
cibly displayed in any mode with the 2nd analog
watch.*—1
Zero-second reset
e The second is reset to zero with push of (9) but-
ton. (29-cut/30-count, instant zero-second reset)
The analog watch is also corrected synchronously
with the digital watch. A shift if caused to the posi-
tion of the zero-second reset (2nd analog watch)
must be corrected later.* —2
Setting of minute
® The minute is set by (B) button. A quick setting of
8Hz is possible with push of (9) button for 1
second or longer.
Setting of hour
e The hour is set by ® button. A quick setting of
8Hz is possible with push of (B) button for 1
second or longer.
®
С
ITIZEN *
ALM D STW
« >
12H/24H display
switch
) < S
‚Push ® button for correc-
tion. A quick correction of
64Hz is possible with push
or longer.
of ® button for 1 second
ç
Correction of 1st analog watch
—3 10
Correction of zero-second reset
position for 2nd analog watch
le or M *—3
) Push (3) button to set the
2nd analog watch at the
12-o'ciock position.
A quick correction of
8Hz is possible with push
button for 1 second
of
or longer.
*—2
(898% )
*—1: The second display mode is obtained in any mode of the 2nd analog watch and even
before or after a correction.
*—2: A correct zero-second reset is impossible if the second hand of the 2nd analog watch is
not set at a correct position. Thus the positioning of the second hand is carried out in a
correction mode for zero-second reset position of the 2nd analog watch. The timing is
kept even in this positioning action. In other words, if the zero-second reset is previous-
ly done, a correct second is obtained after the ordinary time mode is reset.
(Ex.)
Processing of correct second:
58 + 59 (00) 01:02... 29-30-40... ...43-44-@5)
Zero-second reset Pa of position End of correction
Quick advance
of time
Nef A
Jue ma GM
N
Zero-second reset Correction for zero-second End of correction
: reset position of 2nd analog
watch
No setting is required for the position of zero-second reset of the 2nd analog watch as long
as it is once set correctly.
*—3: The ordinary time display is reset in any mode of correction by pushing (М button.
(Instant manual return) |
e Auto-return system
The ordinary time display is automatically reset in 4 ~ 5 minutes in any mode of correction.
( 898: )
4-5. Calendar setting procedure
Calendar display
FF The calendar correction mode is ob-
Dl N tained by pushing (S) button for a sec-
MANE ond or longer.
=
É
DATE — OUT CITIZEN 7
тме |, ALM su A2»s s
a UT STW
(25)
7
In this case, the 2nd analog watch gives
a second display like in the case of the
Ip time correction.
Setting of day
№
Instant manual return
The day is set by operating ® button.
A quick setting (8Hz) is possible with
push of (B) button for a second or
longer.
| Setting of date |
The date is set by operating ® button.
A quick setting (8Hz) is possible with
push of В button for a second or
longer.
№
Instant manual return
Setting of month
CITIZEN °
2»sec our ST
Tri «E
Le — 8
M =
TEMP
°C/F q
1/1000 q
sec —
Instant manual return
The month is set by operating ® button.
A quick setting (8Hz) is possible with
push of (@® button for a second or
longer.
Setting of year
№
Instant manual return
The year is set by operating ® button.
A quick setting (8Hz) is possible with
push of ® button for a second or
longer.
The setting of year is possible from 1980
to 2019.
* The auto-return system functions in 4 ~ 5 minute if no operation is given to the push-
buttons. |
* A non-existing date, if set, is automatically corrected and changed to the first day of the
following month.
( 898 )
4-6. Operation of thermometer
The thermometer functions in the calendar display mode. The temperature can be measured in
both the centigrade and Fahrenheit thermometers with every minute and every second.
a) Switching between centigrade and Fahrenheit thermometers (Cal. No. 8980)
® Simultaneous push of (R) and
buttons
«© >
ad si21) 8
- a
x è
©
TEMP x
°C/F E
17104 9
SEC
CITIZEN ®
ALM DUT STW
DATE OUT
EJ AM | STW A 2k sec
Temperature
Display of centigrade thermometer (°C) Display of Fahrenheit thermometer (°F)
Note: No switching is possible between the centigrade and Fahrenheit thermometers with
Cal. No. 8981.
b) Switching of time units of measurement
« ® >
— — — — — — — ->
Automatic shift* г
Measurement per second
Measurement per minute
A mark °C (or °F) has a flashing
A mark °C (or °F) has a flashing
with every second.
(0.5 sec. duration) with every minute.
* Automatic shift
The per-second measurement mode will be automatically shifted to the per-minute measure-
ment mode in 4 ~ 5 minutes.
898 )
4-7. Operation of alarm
a) ON/OFF switching
Alarm time
Alarm set mark
[Set OFF] [Set ON]
The alarm set ON/OFF is decided by the presence or absence of the alarm set mark. In the
case of ON, the alarm set mark is displayed in all modes excepting the stopwatch mode.
b) The alarm rings 20 seconds at each set time of alarm.
c) The ringing of alarm can be stopped freely with push of any of the push-buttons.
d) Setting of alarm time
The setting mode of alarm time is obtained by pushing © button for a second or longer in
the alarm display mode. In this case, the 2nd analog watch is forcibly set in the approx.
alarm set time display. The digit to be set is selected by © button, and the alarm time is
set by ® button.
Alarm display Setting of hour Setting of minute
Second Approx. alarm
set time
В
DATE DU
TEL AM
CITIZEN Terw Cc
SEC ALM OUT STW w A2psec
| © A second or longer À | A
© : Instant manual return
* A quick setting (8HZ) is possible with push of ® button for a second or longer.
* The approx. alarm set time display is coupling to the digital mechanism. The approx. alarm
set time display is given to the 2nd analog watch after the setting of alarm time is over.
(The pointer makes a round with every 60 minutes in the correction of minute.)
* The alarm display is automatically reset in 4 ~ 5 minutes owing to the auto-return system.
( 898 )
4-8. How to use temp. memory
4-9.
The temp. memory stores the temperature at the moment of an alarm set time. Thus you can
know the temperature at the same time every day or at a certain moment designated option-
ally.
A bar display which is useally given after an alarm time is set will be changed to display the
temperature at the alarm set time. The data of this temperature is held for 24 hours and until
at the next alarm time. (The temp. memory data is cancelled when the alarm time is changed.)
К
X
TEMP ‘ Ë
“C/E :
171000 « E 5 °C
sec
Alarm set at 6:00 AM The temp. at 6:00 AM is stored.
* A centigrade temp. is kept until the next time of measurement although the centigrade dis-
play is switched to the Fahrenheit display and vice versa. (Cal. No. 8980)
How to use dual time
The dual time function is very convenient for a overseas trip or the like.
The 2nd analog watch is capable of three different displays by means of (S) button (Refer to
4-2.) and is forcibly set under the approx. local time in the correction mode of dual time.
* An approx. local time display is ob-
tained after a correction.
Second display A dual time display Is automatically
- reset in 4 ~ 5 minutes if no operation
is given to the push-button. (Auto-
return system)
The function of the 2nd analog watch
) is coupled to the digital watch func-
tion.
* The 1-minute digit and the second are
| Dual time display | common with the ordinary time dis-
play.
A second or longer * М : Instant manual return
®
O or W
W N
>
D mms €
Approx. local time
display
| Setting of hour | | Correction of 10-minute digit |
The time is set by button.
A quick setting (8Hz) is possible with push of ® button for a second and longer.
(898: )
4-10. Operation of stopwatch
The operation of this stopwatch is identical with other ordinary stopwatches except for a
1/1000 sec. display and the fact that the hour is displayed on the 2nd analog watch.
т Stopwatch hour display
Ordinary time display
CITIZEN
ALM OUT
DATE OUT
we AM | SY A2bsec STW
o ern?
lun a EE
Y
la) теме e
e
оо) cor | FYITIA mbr â
oo ооо | EAS LS
> SEC
—-—
`
Reset
CITIZEN *
ALM DUT STW
с
CITIZEN
» SEC ALM D
UT STW
ouT
м | ST
v v
wd Am
LS LA A |;
>
DZ "чаи | w
TEMP 3
DATE DUT
THE] AM | STV abs
Cell” (a se
oT 825;
e
= (fes w
CZ) TEMP ©
o—3 °C/F <
а
171000
SEC
Lap running
Run (Oh. 9min. 1sec. ...) (1h. 18min. 26sec. 249)
CITIZEN
ALM Di
DATE OUT
THE] ALM | STW A 2 sec
:
4
h
UT ST
Lap
r ”
ee EEE
C1 1 «eco js
= =
;
*
HZ) me $
=| or 240 mbr | $
1/1000 t 4
esse sec
Stop Lap stop
(3h. 38min. 57sec. 169) (Display of lap time)
* When the stopwatch mode is released, the 2nd analog watch is reset to the original mode.
* A sound of confirmation is heard with every push of (S) button.
( 898 )
4-11. Alarm monitor
A sound of alarm is produced with a simultaneous push of both (9) and (В buttons in the
mode of the ordinary time display.
4-12. Chime function
a) ON/OFF switching
The ON and OFF of the chime function are switched alternately and every time the alarm
monitor is carried out in the mode of the ordinary time display.
: ; © Simultaneous push of
ANS (5) апа (B) buttons
Tne) a] st Anses ZEN, > >
See I Am (ng
CTA (Le 8 LL esp" (LA :
$ (=== Y ë È
EZ — TEMP = à 3 ® 5 \
(OFF) Chime set mark (ON)
* The chime set mark is displayed in every mode excepting the stopwatch mode when the
chime function is ON.
b) Sound of chime
A beep sound is heard every hour on the hour as long as the chime function is ON.
4-13. Power cell life indicator
The colon on the digital display screen blinks when the 2nd analog watch displays the second
time and the life of the power cell comes near its end with a drop of the voltage. In such case,
the power cell must be replaced soon with new one.
( 898* )
m5. NOTES ON MEASUREMENT OF TEMPERATURE
(1) Accuracy of measurement
(2)
(3)
(4)
A watch put on a wrist is affected by the body heat, and no coincidence is obtained between
the display of temperature and the room temperature. An accurate room temperature is meas-
ured in the following procedure.
® A watch is put off from the wrist and then left as it is for 20 ~ 30 minutes before the meas-
urement. of temperature. This leaving time differs according to the environment in which the
watch is put and requires at least 12 minutes or so.
® The display of temperature approximates to the room temperature in an asymptotic way.
The room temperature is obtained when the display of temperature has a change of about
0.1°C per minute.
e A considerable difference of temperature is produced by the place of measurement even in
the same room. It is especially noticed that a big difference of temperature is produced in a
showcase.
Quick measurement
The watch will easily adapt itself to the room temperature when the watch case touches an
object having a high heat conductivity.
The measurement is possible in a comparatively short time if the watch is forcibly cooled by
air (exposed to the wind). However, the temperature may sometimes change if the supply of
wind is cut since the module of the watch does not adapt itself to the outside temperature.
Range of temperature for measurement
It must be noticed that the measurement of temperature outside a prescribed range will affect
the basic function of the watch.
Comparison with other thermometers
No absolute standard is available for users in terms of the temperature. Accordingly the follow-
ing notes must be noticed in case the value of indication is different from other thermometers.
e A difference of response speed exists between the thermometer of this caliber and a liquid
column thermometer like an alcohol thermometer, etc. or a finished bimetal-type thermo-
meter. Furthermore, as mentioned in (1), a big difference of temperature is caused accord-
ing to the place of the thermometer-and the place of the watch.
® A bimetal-type thermometer or a liquid column thermometer using the soft glass may have
some variation with time to cause some error.
® For an accurate control of temperature, please contact Citizen Service Base where a stand-
ard thermometer is provided.
(898% )
m6. DISSASSEMBLY/ASSEMBLY OF MODULE WITH LUBRICATION
и
Disassembling procedure (1) > 69
Assembling procedure : > (1)
Marks of lubrication:
GC> A—Lube oil
Spacer for LC Display frame
O F-Lube oil display panel [I]
Spacer for LC
display panel [II]
LC display panel holder
(2 hook areas)
Dial
Spacer for LC display panel [II]
(9) LC display panel connection rubber
S——r(5) Dial washer
(6) Hour wheel
© Reflecting plate
Insulator sheet
Circuit unit supporter
(4 hook areas)
(9 Power cell connector spring
a? Unit of electronic circuit ( Ú 2)
Device cover
Buzzer contact spring
*The buzzer contact spring is set after
( ) the device cover.
Power cell (4) CD y
Power cell strap (3)
— (How to set buzzer contact spring)
Caliber No.
Fig. 10 (Digital section)
Additional coil unit
(F 1
P — E
>; Tap, 20) Coil unit ( Y 1)
Additional train wheel bridge (27)
) — Cc |
| A
Intermediate second wheel e2 A > Y Train wheel bridge ( TU 2)
+ @7) 3rd wheel and pinion
a 4th wheel and pinion
N I se | Spacer for train wheel bridge (2 pcs.
Additional rotor (Gold color) @4) © ' N | = Comte e ne ridge (2 pcs.)
| LS © ФА enter wheel coc
| | | ` L |
Second wheel @3 : al Lap а
!
|
|
|
Additional stator e
= БЫ 63 Friction spring for center wheel
(No unsetting required)
62 Center wheel and pinion
| E | ea 62) Minute wheel and pinion
(Pinion side set downward)
| & = 29 Rotor (Silver color)
> 65 Stator
(No unsetting required)
Plate complete
(Usually unsettable)
— LC display panel
supporter
Fig. 11 (Exploded view of plate complete)
( 898 )
6. Notes on assembly/disassembly
a) Handling of thermistor
[CAL. 8980/8981]
A malformation of the thermistor attached to a unit of electronic circuit may sometimes
cause a defective setting of the module into the case. In other words, the positioning be-
comes incomplete for the thermistor. This may cause a defective measurement of tempera-
ture or the breakdown of the thermistor. So that a special attention must be paid to the
foot of the thermistor as well as to the positioning of the thermistor when it is set into a
case.
E - И О o J
(Movement holder of — Е (O vom a vers] Фо A
Cal. No. 898) N Thermistor | (Omer Jo 5
LA LT т A
THERMISTOR © © “© €
| | + O Je |
= 1e (# con. sprine) |
. . E m | + 5-30) LOI |
f height
Standard line of heig Е | Ш | — 0 |
FT — X |
й 2 = | Thermistor
Fig. 13 © e
Fia 14 Make sure the thermistor can be
19. viewed at the center of a through-hole.
[CAL. 8982]
MF — Module
Thermistor L =
—
=: 77
: yo
Movement holder
(The section isolated ZA TI
from the module) К
| С
на ИО
7—AH- . —— Module
7 Thermistor
7
> © 177
Z Movement holder exclusively
X 7 used for Cal. 8982
The above illustration is a view of the module mounted onto the movement holder
with its power cell section facing upward, and the view is obtained from the direction
of the bottom of the face (6 Hour mark) of the watch.
* The module should be mounted on the movement holder in a correct way, as illus-
trated above, making sure that the tip of the thermistor maintains a light contact with
the upper surface of the section of the movement holder which is isolated from the
module. At this time, make sure that the thermistor is almost perpendicular to the
module.
( 898 )
b)
c)
d)
Concerning the LC display panel supporting rubber
Hooking of LC display panel holder and
curcuit unit supporter.
Both the LC display panel holder and the
curcuit unit supporter are hooked to the
LC display panel supporter.
Thus these parts are disassembled after
unsetting the hooked areas by a tweezers.
: Hooked areas (2) of LC display
panel holder
=P: Hooked areas (4) of curcuit unit
supporter
The parts of the train wheels and the addi-
tional train wheels are not interchangeable
with each other.
The additional rotor is plated in gold
color, and the round holes are drilled to
the gears of the second wheel and the
intermediate second wheel respectively.
Spacer for LC display panel
To increase the shock resistance, the
spacers for LC display panel (I, I, and III)
are added to this caliber. Some of this
calibers produced at an early stage of mass.
production lack these spacers.
The spacers for LC display panel (I) and
(II) are just put on the LC display panel
holder or the LC display panel, and so
that be careful not to loose these spacers
when the display frame is unset and on
the like occasions.
To increase shock-resistance of the LC
display panel, three pieces of the LC dis-
play panel supporting rubbers are added
to this caliber. |
Some of these same calibers already pro-
duced in an early stage of mass produc-
tion lack the LC display panel supporting
rubber.
The LC display panel supporting rubbers
(I) and (II) are not attached but simply
placed on the LC display panel or the LC
display panel holder. So, be careful not to
miss them when removing the display
frame and the like.
Round holes
drilled
Fig. 16
D— Space for train
wheel bridge
(Gold color)
A siver color
( 898 )
uolla|¡duO9
uO1158141409
suoilouny pue
e9uesesdde JO YOU
14
J1n9419 91041399 JO |
ип JO luswaodejday |
ojes ul]
40 Juaw)sn{pe
nseaN
=]
al
Ва, Ч
Lo
uolidunsuoo Jamod
}о 1чэшеалп5еэ)\
Г 5!
|
a
иполо эиодоере JO |
| due jo 32945 0! NO
poob ON
{сено =
obe1}0A {120 Jjamod
JO 1uUuewaInNsSeaN
[e
a
| +0 juewisnipy q
_ un jo JusWIe|da y | a|qissoduw
| J 1uswisnipy
ajgissod
juewisnfpy 9jel awl] L oBeljoA ||90 Jamod
yo JUBWIAINSEIN
„ |
1199
1 JO 1uswadejday В
Jamod | >
J | ON
aBel|on MOT
| SJOOËM шел
| 40 49849
9
AO
yolem
+0 UOI1IPUOO Buisn
JO чоцешлцио))
т
Hun [109 40
1uswidoejday
aoueisisal {109
10 JUBUJSINSE@IN
of
sH
ed uoN99ULO9S
pooh ON
anos эмолоэре 40 | —
pooB ON |
+0 49949
BUIYIOM
/Aejdsip jeuioN
HO i
dois bojeuy
s¡eubis Z Aejdsip
=.
wisiueyoswl
Jalawowiiay}
+0 498949
dl
ainleldadwal yO
1uswainseawt aAl10848(d
poob oN + uueje 40 40049
uoilouny
iH
wee Jo 10848
Wstueyosu
Y9LIMS JO Y99U
| 6 = duue{ 40 158490
poob ON
NO | |
wsiueyoaus
Y9jIMS JO YI9UJ
oT
(‘010 ‘sAe|dsip
10 YOIIMS 919/dUOOU|)
UOI]EJadO U! 15848
ale) awl}
JO JuewoInsSeaWN ‘e
L
9jel aw] BUOJIM
122 Jamod 40
|
jun yo 1uawooe|day В | indino 40 49849
1uawaoe|dad 1 poob oN | joued
JO UOI 981409 - Aejdsip 971 40 Ued €
L_ J | | UO01198UU09 40 49849
NO
joued Aejdsip 57 40 11N9419
9/u0.12aja8 JO Tun yO JUesLwISSe|da y
a
| поло эпола 10 | _
pun 10 1uewade|day | all
jeu1B1ip ¡PLUJON
juswaoe|day
BulyJOM Bojeue
JewloN/Ae|dstp
(e1161p on1199490
o6e3/04 MO]
dois bojeuy
Aejdsip |енбир ом
LL По
J
abe1|oA (jo Jamod | dois yaiem
JO 1uswainsea Aejdsip ON
1 q
AO
ATdINASSVYSIA/ATANTISSY NO SILON Z
( 898 )
Checking items :
How to check
Results and treatment
1 | Measurement
of power cell
An easier measurement is possible if
the device cover is removed.
7 (280-30).
|
voltage The minus pattern can be viewed
through the hole of a circuit unit sup-
porter.
And avoid a short circuit to the circuit
unit supporter.
<D.C. 3V >
CITIZEN)
©
ИК UR 4 JEWELS] Oc ON
| i 5 s Te Eo Saran O |
o е 5 E 9
wis Oe
=) — (+ соб SPRING | ©) |
|
——” Nondefective
Under 1.5V
— Replacement of
power cell
( 898 )
Checking items How to check Results and treatment
2) Check of
output b) Check of 2nd analog output signal
signal
a) Check of 1st analog output signal
When checking the 2nd analog output signal, the 2nd analog
mode is always set at the second display.
a) Tester pointer swing-
ing right and left with
7 6 5 ë
CITIZEN °
A 2PSEC ALM DUT STW
Sp] 11:09) (9) button to be operated so that every 20 sec.
LEN SELL Я )} the 2nd analog mode mark ( A) .— Nondefective
= (mr ; comes to the position of SEC.
(See Fig. 18)
b
—
Tester pointer swing-
ing right and left
* An easier measurement is possible with removal of the device ‚ емегу second
cover.
— —» Nondefective
Be careful of a short circuit caused with the circuit unit sup-
porter ¡f the device cover is removed.
<D.C. 0.3V >
\ No output signal
N — Replacement of
Cf À unit of electronic
г circuit
b)
7
(EAN |
UNADJUSTED JAPA!
8980 9
O) © ® E } a)
+ © ©
(+) © e
=) + COIL SPRING
© 280-30
®
ET
Checking ¡items
How to check
Results and treatment
El Check of
connection
partof LC
display panel
Hook areas
The following points are checked.
Make sure that the LC display
panel holder is set in a correct
and complete way with no
malfunction.
Make sure that the electrode
part of the LC display panel
Electrode part
rubber (Non-conductive)
LC display pane! supporting
Make sure that the electrode
part of the unit of electronic
circuit is free from any stain
or breakdown of a pattern.
Make sure that the LC display
connection rubber is set in a
correct and complete way
with no wear nor twist.
LC display panel
connection rubber
Fig. 23
is free from any stain or crack.
Defective setting
— To be set again
Malformation
— Replacement of
LC display panel
holder
Stains
—— To be cleared off
Crack
— Replacement of
LC display panel
Stains
— To be cleared off
Breakdown of
pattern
— Replacement of
unit of electronic
circuit
Defective setting
— To be set again
Malformation of
connection rubber
~— To be replaced
*When no fault is
detected through above
checks, the LC display
panel or the unit of
electronic circuit is
replaced after con-
firming the value of
power consumption,
etc.
4 | Check of
connection
part
Screws for unit of electronic circuit
An inspection is paid to the
driving condition of the
screws for unit of electronic
circuit as well as to the
foreign matters or stains
sticking to the area between
the coil terminal and the
analog output terminals on
the rear side of the unit of
electronic circuit.
PTI TITITI TIN ITITITI TIO
‘ | HEN
i NN
|
ZN
No
a A
Coil terminals
Output terminals
, > 7 a | | 4 [AN
ml {LP в
Screws driven loose
— To be driven tight
again
Foreign matters or
stains
—— To be removed
away
( 898% )
Checking items
How to check
Results and treatment
5
Measurement
of coil
resistance
a) Measurement of resistance for addi-
<x 100> tional coil unit
b) Measurement of resistance for coil unit
GITIZEN)
Additional coil unit
Fig. 27
* Avoid giving the disconnection to the coil.
a) Resistance value of
additional coil unit:
|22-2.8Ka |
——» Nondefective
b) Resistance value of
coil unit:
0.9~ 1.3K |
— Nondefective
Resistance value
outside above ranges
———» Replacement of
each coil unit
Check of
train wheels
Make sure of the setting condition of each wheel plus the degree
of clearance, etc.
Train wheel bridge
— —— ь < нь
Center wheel cock~__
1 —
\ Rotor
Plate complete
Minute wheel and pinion
with cannon pinion
(Cross section of additional train wheels)
Intermediate
second wheel
Second wheel
Center wheel and pinion
= |
4th wheel and pinion
3rd wheel and pinion
Friction spring for center wheel
Hour wheel
Additional train wheel bridge
Additional rotor
Plate complete
Fig. 28
( 898
Checking items
How to check
Results and treatment
7 | Measurement
and adjust-
ment of time
rate
a) Measurement of time rate
For the digital section, the measured value will easily become
unstable owing to the 3-split multiplex drive.
For the analog section, set the range of measurement at 2 sec.
The measurement is possible regardless of the display on the
2nd analog watch.
b) Adjustment of time rate
The accuracy of this watch 1s +15 sec. per
month at the normal temperatures.
Trimmer condenser
(Silver color)
(Clockwise turn: gains of time)
The time rate is adjusted by turning a trim-
mer condenser (silver color).
и J —N
In this case, a gold-colored trimmer condens- AE CA N
le ITIZEN WATCH CO
er (for temp. add.) is also visible if the device
cover is removed.
So that be careful not to get confused with
these two trimmer condensers.
* |f the gold-colored trimmer condenser (for
temp. add.) is turned, the thermometer will
go wrong. | |
* You will not be confused with these two
i UNADJUSTED JAPAN |
trimmer condensers unless you remove the
device cover.
|8 | Confirmation
of using
condition of
watch
Check the following points related to the use of a watch with its
user.
e Did the user use his watch in a wrong way?
eWhat about the environment in which the watch was used?
eWhen did the user carry out the replacement of power cell last?
e And other factors related to the use of the watch.
Fig. 30
9 | Check of
switch
mechanism
Make sure of the state of contact between each switch spring and
the unit of electronic circuit. No correct working may not be
secured if the assembling is not perfect between the circuit unit
supporter and the LC display panel supporter.
a у E Der Ta
\ RY LC display panel
| supporter
Circuit unit
supporter
Fig. 31
О : Switch part
>: Assembling part between switch spring part and LC display
panel supporter (2 areas)
Stains at switch part
— To be cleared off
Incomplete assembling
— To be assembled
again
Malformation of
circuit unit supporter
— To be repaired or
replaced
Defective pattern
of unit of electronic
circuit
— Replacement of
unit of electronic
circuit
(898: )
Checking items
How to check
Results and treatment
10 | Check of
illumination
lamp
Power cell
y Sn
7 = (OJ Dá ; =
TES
— pp Ta o am) ==
Switch pattern
Fig. 32
Inspection between
A and B:
Lighting
——» Nondefective
No lighting
— Break of filament
Inspection between
A and C:
Lighting
— Nondefective
No lighting
— Break of circuit
Some fault detected
through above checks
— Replacement of
pattern
unit of electronic
circuit
11 | Check of
alarm
mechanism
Both ® and (9) buttons are pushed at one time in the mode of
the ordinary time display.
<D.C.0.3v>
OUR 4 JEWELS N
Citizen WATCH CO.
S80 JAPAN o
по
Л
Do.
e 9
Tester pointer swinging
at about 0.05V
——» Nondefective
No alarm output
confirmed at all
— Replacement of
unit of electronic
circuit
( 898 )
Checking items
How to check
Results and treatment
12 | Check of
thermometer
mechanism
Cal. No. 898)
THERMISTOR
(Movement holder of —
a) The temperature is continuously bar-displayed if the ther-
mistor has a short circuit or the thermometer system itself has
some fault.
In such case, the unit of electronic circuit must be replaced
with new one. However, the display of the bar mode does not
mean a fault at all in the following cases.
(1)
In the case of a temperature outside a prescribed range of
measurement.
(2) In the case of the temperature memory mode and in the state
before actuation of the memory.
The above confirmation must always be performed in a state
under which the Cor F mark is flashing every second,
b) The temperature indicating value has some shift:
It may be rare to have a correct standard availabel on the
general market in terms of the temperature. In this connec-
tion, the condition in which the customer measured the tem-
perature must be confirmed after understanding well the con-
tents of Section 5-3.
Then the following points are checked if some fault is detected.
(1)
The state of assembly is examined between the thermistor
and a temperature-sensitive plate.
As shown in Fig. 36, the thermistor touches a temperature-
sensitive plate. If the contact is incomplete between these
two parts, the temperature response properties may some-
times be deteriorated.
The positioning of the thermistor must be thoroughly ex-
amined in the state of a module.
[CAL. 8980/8981]
Temperature-sensitive plate |
Thermistor
“Le
Fig. 35
Short circuit of lead
wire of thermister
— T0 be repaired
Repair impossible
— Replacement of
unit of electronic
circuit
Thermistor lead wire
Fig. 34
>
a
/
[citizen WATCH CO. |
UNADJUSTED JAPAN ›
pi
> 8980 | ‚
o) - =
2.4 mm
Thermistor
- TUN
Standard line of height
Hoe
|
(=)
| =) — 19) (280-30)
($ cor serine]
4.4 mm
Side view of finished module
FOUR 4 ‚снес © O ВЕ N
0°
2
© © 0
|
©
F
Y
Da Thermistor
Make sure the thermistor can be
Fig. 36
viewed at the center of a through-hole.
( 898 )
Checking items
How to check
Results and treatment
The positioning of the thermistor is confirmed in the same way
as mentioned in a) of Section 7-2.
It the positioning is defective, a correction is given to the ther-
mistor lead wire by means of a tweezers.
The movement holder of 898” contains a standard line of height
of the thermistor for the convenience when the height of the
thermistor is confirmed in the state of a module.
[CAL. 8982]
. | —
Thermistor 777
3 FOR 77
Movement holder 7 7
(The section isolated CLT 7
from the module) И 8 о
Power cell ’ CO
_—— Module
7 ZZ 7 77 A Thermistor
7 Movement holder exclusively
7 used for Cal. 8982
The above illustration is a view of the module mounted onto the
movement holder with its power cell section facing upward, and
the view is obtained from the direction of the bottom of the face
(6 Hour mark) of the watch.
The module should be mounted on the movement holder in a
correct way, as illustrated above, making sure that the tip of the
thermistor maintains a light contact with the upper surface of the
section of the movement holder which is isolated from the
module. At this time, make sure that the thermistor is almost
prependicular to the module.
898: )
Checking items | How to check Results and treatment
(2) Adjustment of temperature Adjustment of temp.
The adjustment of temperature is carried out in the following impossible
sequence. — Replacement of
e Remove the device cover. | unit of electronic
circult
® Set the thermometer in a display mode of 1-second sampl-
ing. * Adjustment of temp.
® Adjust the temperature by turning the trimmer condenser is already given to the
(for temp. add.). unit of electronic
circuit as a repair
* Avoid giving the effect of the body heat to the thermistor. parts.
* An accurate adjustment is impossible if the thermistor is
put into the watch case.
* Put a standard thermometer and a module close to each
other as much as possible.
* Leave the thermistor after the adjustment in order to
avoid the effect of the body heat. Then confirm the dis-
play of the temperature.
* In case the thermometer is shifted automatically to the
1-minute sampling mode, push ® button (in a state of
the switch spring only) to switch the 1-minute sampling
mode to the 1-second sampling mode. (Be careful of the
flashing of the °C and °F marks.)
Silver-colored
trimmer condenser
(for time add.)
Gold-colored
trimmer condenser
(for temp. add.)
Fig. 37
(898+ )
Checking items
How to check
Results and treatment
13
Measurement
of power
consumption
<D.C. 12uA>
1
¡2uA 3mA
A
ma CMZEN — +
Power cell
С O FOUR 4 JEWELS O © N
CITIZEN WATCH CO.
UNAD JUSTED JAPAN
® > “©
e
amO
Fig. 38
Short circuit to be checked
between LC display panel
holder and thermistor
Thermistor
Fig. 39
These positions are also effective for measurement
in case the original positions are not convenient.
consumption will increase by about 1uA.
When a load compensating circuit is active, the value of power
The load compensating circuit is cancelled in maximum one
minute as long as the 2nd analog watch has a normal movement
of the hand.
With finished module:
| Under 3.6uA |
——» Nondefective
With LC display panel
removed if over the
above value:
| Under 1.5UA |
— Replacement of
LC display panel
* Otherwise the unit of
electronic circuit is
replaced.
* Power consumption to
increase with short
circuit of thermistor
Short circuit of
thermistor
—— T0 be repaired
(_898* )
Checking items
How to check
Results and treatment
14 | Check of
appearance
and
functions
® The external appearance of the watch is perfect with ng defect
at all. -
® The controllability of the watch is excellent.
e Each function of the watch works in a smooth and correct way.
Fig. 40
* All segments on the watch face glow about 2 seconds with a
simultaneous push of W) , 6) and ® buttons. After this, the
checking mode for factory is automatically obtained.
In this case, however, some error of time may sometimes be
caused.
* The alarm sound monitor is obtained with a simultaneous push
of ©) and ® buttons.
*The all-reset mode is obtained with a simultaneous push of all
push-buttons.
CITIZEN WATCH CO.,LTD.
Tokyo, Japan
PRINTED IN JAPAN