Seiko 7T32B User manual

EMMY WATCH
VINTAGE RESTORATIONS
Seiko 7T32B,7T42B Movement Parts (1)
Compiled by EmmyWatch - htips://www.emmywatch.com

PARTS CATALOGUE /TECHNICAL GUIDE
[SPECIFICATIONS]
Cal. 7T32B
Cal. 7T42B
Cal. No.
item
7732B | 7T42B
Movement
The illustrations refer to Cal. 7T32B.
{x 1.0)
Movement size
Outside diameter, g27.6mm
24.0mm between 3 o’clock and 9 o’clock sides
Casing diameter | 827.0mm
24.0mm between 3 o'clock and 9 o‘clock sides
Height 3.2mm
Time indication Main time Stopwatch Alarm Timer (for Cal. 7T42B}
Hour, minute | Minute and | Small hour and | Minute and second hands
and small 1/5-second | minute hands (Stopwatch 1/5-second
second hands} hands and minute hands)
Driving system
Step motor, 4 pieces
Additional mechanism
* Electronic circuit reset switch
* Train wheel setting device
+ Battery life indicator (Small second hand moves at two-second intervals.)
e Date calendar
* Instant setting device for date calendar
* Stopwatch function (Up to 30 minutes in 1/5 seconds)
« Accumulated elapsed time measurement
« Split time measurement
* Timer function (Up to 60 minutes in minutes)
* Alarm function (12-hour indication system}
* Alarm test system
Loss/gain
Monthly rate at normal temperature range: less than 15 seconds
Regulation system Nil
Measuring gate by quartz tester Use 10-second gate.
Battery SEIKO SR927W, Maxell SR927W, SONY SR927W, EVEREADY 399
Battery life is approximately 2 years.
Voltage: 1.55V
Jewels 0 jewel
SEIKO CORPORATION

PARTS
CATALOGUE
Cal.
77328,
7T42B
Disassembling procedures Figs. : @ > ®
Reassembling procedures Figs. : © > ®
Lubricating: Types of oil Oil quantity
@@
Moebius
À
OC
Normal
quantity
OC>
SEIKO Watch
Oil
S-6
C>
Extremely
small
OC> Silicone Oil 500,000 c.s.
4589 801
Piezoelectric element
\
N
HO Case back
[gr
À
NO) Case back gasket
Case ring (Cal. 7T32B)
aD Stopwatch second
hand/Timer minute
hand
Antimagnetic
shield
plate
(B}
L®
Minute
hand
(Cal,
77428}
7
1 Hour hand
Button C ”” P a
Ove E ——® Small second hand
A sea ei
RP ® Button spring clip ' #«——® Stopwatch minute
H hand/Timer second
Button B
hand
Alarm minute hand
Alarm hour hand
Dial
(10) Winding stem
Button A
Button spring
Holding ring for dial
O > Please see the remarks on the following pages.

Cal. 7T32B, 7T42B
027 973
Pin for date dial guard
808 580
Date dial guard
878 527
Date
dial
962 580
Intermediate wheel
for calendar correction
737 580
Date corrector setting
wheel
802 580
Date driving wheel
271 583
Hour wheel for alarm
Hour wheel
240 580
Small second wheel
885 590 — ——Ö ———Ä-
First intermediate wheel
for second-counting
950 590 ——
Intermediate minute-
counting wheel
902 580
Minute-counting wheel
950 590-
Intermediate alarm wheel \ 5
270580 ————_
Center minute wheel
@60
©
©®
for alarm
261582
i
Minute wheel for alarm nn
281582 —— 7 eus
Setting wheel for alarm
T1 022 230
Battery clamp screw
= 022 459
| | Circuit block cover screw
O = Please see the remarks on the following pages.
022 230
Battery clamp screw
4225 714 (Cal. 77328}
4225 716 (Cal. 7T42B}
Battery clamp
Battery
{See the front page.)
022 459
Circuit block cover screw
4457 728
Circuit block cover
396 580
Friction spring for
second-counting
4000 710 (Cal. 7T32B)
4000 712 (Cal. 7T42B)
Circuit block
4246 700
Buzzer lead terminal
4270 710
Battery connection (~}
027 974
Pin for train wheel
bridge
125 590
Train wheel bridge
Second-counting wheel
4283 581
Spacer for center wheel
and pinion
241583
Fourth wheel and pinion
231580
Third wheet and pinion
701 580
Fifth wheel and pinion
885 591
Second intermediate wheel
for second-counting
261 580
Minute wheel
281 580
Setting wheel

ii J
PARTS CATALOGUE
Cal. 7T32B, 7T42B
4146 710
Step rotor è
4146 —
Chronograph rotor for second
4146 710
Alarm rotor
@ 4146 710 ANE
Chronograph rotor for minute
4002 700
Coil block
4002 700
Coil block for chronograph second
A002 711 —
Coil block for chronograph minute
O
>
Please
see
the
remarks
on
the
following
pages.
4002 711
Coil block for alarm
4450 710
Switch lever A
383 591
Setting lever for alarm
383 592
Setting lever
351 580
Winding stem for alarm
282 582
Clutch wheel for alarm
384 580
Yoke
351 580
Winding stem
282 580
Clutch wheel
391 591
Train wheel setting lever
4239 710
Rotor stator
4239 711
Rotor stator for chronograph second
4239 712
Rotor stator for alarm
4239 713
Rotor stator for chronograph minute
Center wheel and pinion
4450 702
Switch lever C
4450 701
Switch lever B
100 590
Main plate

PARTS
CATALOGUE
Cal.
77328,
7T42B
Remarks:
Holding ring for dial
The
type
of
holding
ring
for
dial
is
determined
based
on the
design
of
cases.
Check
the
case
number
and
refer
to
“SEIKO
Casing
Parts
Catalogue”
to
choose
a
corresponding
holding
ring for dial.
60 Pin for date dial guard
@ Pin for train wheel bridge
For
distinction
between
the
pins,
see
the
illustration
below.
[Pin for date dial guard} [Pin for train wheel bridge]
027 973 027 974
@
Date
dial
878
527
(Black
figures
on
white
background)
The
type
of
date
dial
is
determined
based
on
the
design
of
cases.
Check
the
case
number
and
refer
to
“SEIKO
Casing
Parts
Catalogue”
to
choose
a
corresponding
date
dial.
© Hour wheel
@ Second-counting wheel
Gs Center wheel and pinion
Combination
Parts
name
;
Type*
Hour
wheel
Second-counting
wheel
|
Center
wheel
and
pinion
LAS
i
——a
A
u
al
So
==
—s,
i
4
i
271
580
888
580
221
580
-
Ÿ
’
ZZ
!
M
A
===
i
i
271588
888
582
221
583
… Short type
*Abbreviation A
.. Standard type
{Movement type}

PARTS CATALOGUE Cal. 7T32B, 7T42B
63 Circuit block
To
identify
the
circuit
blocks
for
respective
calibres,
check
the
holes
on
the
pattern
as
shown
in
the
illust-
rations.
Cal. 7T32B Cal. 7T42B
x
è
N
_ ldenufication
LB hole
We
@ Winding stem for alarm
© Winding stem
The type of winding stem for alarm and winding siem are determined based on the design of cases.
Check the case number and refer to “SEIKO Casing Parts Catalogue” to choose a corresponding winding
stem.

TECHNICAL GUIDE
* The explanation here is only for the particular points of Cal. 7T32B and 7T42B.
e
For
the
repairing,
checking
and
measuring
procedures,
refer
to
the
“TECHNICAL
GUIDE,
GENERAL
INSTRUCTIONS”.
I. STRUCTURE OF THE CIRCUIT BLOCK
Output terminal
Upconverter coll
‘Output terminal
Il. REMARKS ON INSTALLING THE BATTERY
* A necessary step after installing the battery
»
After
the
battery
is
replaced
with
a
new
one,
or
after
the
battery
is
re-installed
following
the
repairing
procedures,
be
sure
to
short-circuit
the
AC
terminal
and
the
circuit
block
cover
with
tweezers
to
reset
the
circuit
as
shown
in
the
illustration
below.
/
Tweezers
* After resetting the circuit, be sure to reset the stopwatch hands to the 12 o'clock position.
1) Pull out the crown at the 3 o'clock side to the
second click.
2) Press button “B” to reset the stopwatch second N
hand to “0”. Button © 7
3) Press button “A” to reset the stopwatch minute /
hand to “0”. |
* With each press of buttons “B” and “A”, the ARAN
stopwatch second and minute hands move 0.2 Button ON
seconds and 0.5 minutes, respectively. They
move automatically while the buttons are kept
pressed and stop when they are released.
Cal. 7T32B, 7T42B

TECHNICAL GUIDE Cal. 7T32B, 7T42B
I. REMARKS ON DISASSEMBLING AND REASSEMBLING
@ Winding stem with crown for alarm
Winding stem with crown
* How to remove
* Winding stem with crown at the 3 o'clock side:
Pull out the crown to the first click, and then push the setting lever by inserting the tip of tweezers
into hole “A” in the illustration below.
* Winding stem with crown for alarm at the 4 o'clock side:
Pull out the crown for alarm to the first click, and then push the setting lever for alarm by inserting
the tip of tweezers into hole ”B” in the illustration below.
SEIKO TIME
A corp
UnaDJUSTED
* Remarks on setting the winding stems
The winding stems at the 3 o’clock and 4 o’clock sides can be used interchangeably. However, note
that the type of crown differs depending on the length of winding stem and the design of cases.
@ Stopwatch second hand
@® Stopwatch minute hand
* Remarks on installing
When
installing
those
stopwatch
hands,
check
that
they
accurately
point
to
the
stopwatch
scales
on
the
dial.
© Stopwatch second hand
* Remarks on installing
After installing the hands, check that there is a proper clearance between the stopwatch second hand
and other hands.
Dial
* Remarks on installing
When installing the dial, make sure that its center is securely set at the proper position.

TECHNICAL
GUIDE
Cal.
7732B,
7T42B
@ Pin for date dial guard
* How to remove * How to install
1) Turn the pins 90° counterclockwise to loosen 1) Set the pins properly into the grooves.
them using a screwdriver. ; ; A
2) Turn the pins 90° clockwise using a screw-
2) Pick up the pins using rodico. driver to fix them.
Notes: + Never turn the pins more than 90° clockwise or counterclockwise.
* Never apply undue force to the pins in turning them using a screwdriver.
* Be sure to use a screwdriver that fits in with the slot of the pin head.
* Lubricating
Lubricate the date jumper and the tips of the date dial
as
shown in the illustration.
Moebius A
@ Hour wheel
* Remarks on installing
When installing the hour wheel, be sure to engage it securely with the pinion of the minute wheel.
és Battery clamp
* How to install
Set the battery clamp securely to the guide tube,
taking care not to press down the protruded
portion of the circuit block cover.
(er) Battery
* Remarks on installing
After installing the battery, be sure to reset the circuit
with tweezers as shown in the illustration.