Seiko 5Y19A Quick start guide

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PARTS LIST/TECHNICALGUIDE
ANALOGUE QUARTZ Cal. 5Y19A
[SPECIFICATIONS]
Cal. No.
Item 5Y19A
Movement
Driving system
Additional mechanism
Loss/gain Monthly rate within normal temperature range: less than 15 seconds
Regulation system Nil
Measuring gate by quartz tester Use 10-second gate
SEIKO SR920SW
Battery
Battery No.
Voltage 1.55 V
Battery life Approximately 3 years
Jewels 0 jewels
Step motor (Load compensated driving pulse type)
• Daycalendar
• Instantdatesettingdivice
• Datecalendar
• Electroniccircuitresetswitch
• Trainwheelsettingdevice
• 24hourindicator
• 3 hands (hour, minute and
sec ond hands)
• Diameter
Outside : ø24.0mm
21.5 mm between 3 o’clock and 9 o’clock sides
21.5 mm between 6 o’clock and 12 o’clock sides
Casing : ø 23.3 mm
21.3 mm between 3 o’clock and 9 o’clock sides
21.5 mm between 6 o’clock and 12 o’clock sides
• Height: 3.07 mm (Including battery portion)

PARTS LIST Cal. 5Y19A
2/12
Please see the remarks on the following pages.
Lubricating of some parts is shown in “II. REMARKS ON DISASSEMBLING AND REASSEMBLING”.
Disassembling procedures Figs. : 1 44
Reassembling procedures Figs. : 44 1 AO-3
AO-2
SEIKO Watch Oil S-6
Normal quantity
Large quantity
Lubricating : Types of oil Oil quantity
2 HOUR, MINUTE AND SECOND
HANDS
5 DATE HAND
6 DIAL
7 CALENDAR MECHANISM PLATE
SCREW
0022 222
8 CALENDAR MECHANISM PLATE
0839 509
9 DATE STAR
0970 538
10 DAY DRIVING WHEEL
0802 535
11 DATE DRIVING WHEEL
0802 570
1 CASE RING
3 DAY HAND
4 24-HOUR HAND

PARTS LIST Cal. 5Y19A
3/12
Please see the remarks on the following pages.
Lubricating of some parts is shown in “II. REMARKS ON DISASSEMBLING AND REASSEMBLING”.
13 DAY STAR
1002 546
12 24-HOUR HAND WHEEL
0157 543
14 DATE CORRECTOR WHEEL
0804 570
15 INTERMEDIATE DATE WHEEL
0817 539
16 HOUR WHEEL GUARD SCREW
0022 222
17 HOUR WHEEL GUARD
0376 506
18 DATE CORRECTOR SETTING WHEEL
0737 909
19 SECOND INTERMEDIATE WHEEL FOR
DATE SETTING
0962 909
20 HOUR WHEEL
0271 563

PARTS LIST Cal. 5Y19A
4/12
Please see the remarks on the following pages.
Lubricating of some parts is shown in “II. REMARKS ON DISASSEMBLING AND REASSEMBLING”.
21 BATTERY
SR920SW
22 BATTERY CONNECTION (+) SCREW
0022 247
23 BATTERY CONNECTION (+)
4000 760
24 CIRCUIT BLOCK
4000 760
25 TRAIN WHEEL BRIDGE
0125 904

PARTS LIST Cal. 5Y19A
5/12
26 FOURTH WHEEL & PINION
0241 528
27 THIRD WHEEL & PINION
0231 904
28 FIFTH WHEEL & PINION
0701 904
30 MINUTE WHEEL
0261 908
31 TRAIN WHEEL SETTING LEVER
0391 890
32 SETTING LEVER
0383 891
33 YOKE
0384 890
Please see the remarks on the following pages.
Lubricating of some parts is shown in “II. REMARKS ON DISASSEMBLING AND REASSEMBLING”.
29 STEP ROTOR
4146 890

PARTS LIST Cal. 5Y19A
6/12
Please see the remarks on the following pages.
Lubricating of some parts is shown in “II. REMARKS ON DISASSEMBLING AND REASSEMBLING”.
34 SETTING WHEEL
0281 904
35 SETTING STEM
0351 892
37 1ST INTERMEDIATE WHEEL FOR
CALENDAR CORRECTION
0962 890
39 COIL BLOCK
4002 760
41 CENTER WHEEL AND PINION
0221 575
43 BATTERY CONNECTION(-)
4270 904
36 CLUTCH WHEEL
0282 890
38 COIL BLOCK SCREW
0022 247
40 ROTOR STATOR
4239 904
42 INSULATOR
4216 904
44 MAIN PLATE
0100 959

PARTS LIST Cal. 5Y19A
7/12
lTools and consumables required for disassembling/reassembling
•Movement holder
UNIVERSAL MOVEMENT HOLDER (S-682)
• Watch oils
SEIKO watch oils (AO-3 and AO-2)
AO-3 AO-2
S-6
SEIKO watch grease (S-6)

TECHNICAL GUIDE Cal. 5Y19A
8/12
●The explanation here is only for the particular points of the Cal. 5Y19A.
I. REMARKS ON DISASSEMBLING AND REASSEMBLING
2 HOUR, MINUTE, SECOND HANDS– 6 DIAL
■ Remarks on removing the small hands (Date, day and 24-hour hands)
• Whenpullingoutthesmallhands,besuretoholdthedialwhilepullingthemout.
• Whenpullingoutasmallhand,putthehandremoverunderthepipeofthehandandthenremovethe
hand.
■How to install the dial and the hands
1.Pulloutthecrowntothesecondclickposition.Turnthecrownuntilthedate,andsubsequently,the
dayoftheweekchange.Makesurethecompletionofthedateandthedayoftheweekchange,set
thedial.
2.Installthedatehandandthedayhandinorder.
3.Turnthecrownfurtheruntiljustafterthedatechanges.
4.Installthe24-hourhandatthe24o’clock(zero)position.
5.Installthehour,minuteandsecondhandstothe12o’clockposition.
Dial
Insertthehandremoverhere.
Smallhand Pipe

TECHNICAL GUIDE Cal. 5Y19A
9/12
Day jumper section
8 CALENDAR MECHANISM PLATE
<Lubrication>
Date jumper section
10 DAY DRIVING WHEEL
Set the day driving wheel so that its
claw b is in the area of Marker B on
the hour wheel gurard.
Claw b
11 DATE DRIVING WHEEL
Set the date driving wheel
so that its claw a is touching
Marker A on the main plate.
Marker A
Claw a
13 DAY STAR
14 DATE CORRECTOR WHEEL
15 INTERMEDIATE DATE WHEEL
9 DATE STAR
9 DATE STAR – 15 INTERMEDIATE DATE WHEEL
12 24-HOUR
HAND WHEEL
Marker B

TECHNICAL GUIDE Cal. 5Y19A
10/12
23 TRAIN WHEEL BRIDGE
<Lubrication>
Lubricate the step rotor pivot and minute wheel
pivot as shown in the illustration. Be sure to
lubricate the cotact point of TRAIN WHEEL
SETTING LEVER and SETTING LEVER.
Lubricate as shown in the
illustration below.
18 DATE CORRECTOR SETTING WHEEL
20 HOUR WHEEL
19 SECOND INTERMEDIATE WHEEL
FOR DATE SETTING
Set the hour wheel so that
any of its eight teeth is in
alignment hollow of the
Marker C on the main plate.
Marker C
Edge of the Teeth
18 DATE CORRECTOR SETTING WHEEL– 20 HOUR WHEEL
Lubricate as shown in the
illustration below before
installing the date corrector
setting wheel.