Seiko 4T57A Technical Manual & Parts Catalogue Download Page 10

Cal.  4T57A

10/11

TECHNICAL GUIDE

Minute hand

Hour hand

 

Stopwatch minute hand 

(

moves 

in minute increments) 

Second hand

 

Stopwatch second hand (moves 

in second increments)

 

Stopwatch 1/10 second hand (moves 

in 1/10 second increments)

 

But ton "A" in stopwatch 

function: Start/Stop

First click: Date setting

Second click: Time setting

Crown at normal position

 

Button "B" in stopwatch function: 

Split/Slit release/Reset

*  The measurement time indicated by the stopwatch hands that move independently of center hands.
*  Stopwatch 1/10 second hand moves for a first minute.  After one minute, it indicates the measurement 

time when it is stopped.

   DISPLAY AND CROWN/BUTTON OPERATION 

2. Turn the crown clock-

wise until the previous 
day’s  date appears.

3. Pull out the crown to 

the second click when 
the second hand is at 
the 12 o’clock position.  
It will stop on the spot 
and advance the hour  
and minute hands by  
turning the crown.  
(Check that AM/PM is  
set correctly.)

*  When  the  crown  is  at 

the second click posi-
tion, do not press any 
button. Otherwise, the 
chronograph hands 
will move.

1. Pull out the crown to  

the first click.

4. Push the crown back in 

to the normal position in  
accordance with a time 
signal. 

*  Do not set the date between 9:00 P.M. and 1:00 A.M.
  Otherwise, the day may not change properly. If it is necessary to set the date during that time period, 

First change the time to any time outside it, set the date and then reset to the correct time.

   TIME SETTING 

Summary of Contents for 4T57A

Page 1: ...and Calendar Stopwatch Up to 1 minutes in 1 10 second 2 seconds per round Up to 60 minutes in 1 second split time Two pole stepping motor Step motor 3 pieces 3 Hands Hour Minute Second Chronograph Mi...

Page 2: ...ronograph minute wheel 0886 003 21 Chronograph second wheel 0888 009 2 Hour wheel 0271 407 2 Hour minute and second hands 8 Date corrector wheel 0806 368 18 Chronograph minute wheel 0902 008 19 Interm...

Page 3: ...28 battery CONNECTION 4270 358 31 Fifth wheel and pinion B 0701 014 32 Step rOtor B 4146 177 33 Coil block B 4002 923 34 Rotor stator B 4239 357 35 Train wheel bridge B screw 0012 079 36 Train wheel...

Page 4: ...81 904 49 Coil block A 4002 904 50 Rotor stator A 4239 357 51 Train wheel setting lever 0391 368 52 Setting lever 0383 368 53 Yoke 0384 470 54 Clutch wheel 0282 890 55 Intermediate wheel FOR DATE CORR...

Page 5: ...vement holder UNIVERSAL MOVEMENT HOLDER S 682 Watch oils SEIKO watch oils AO 3 and AO 2 AO 3 AO 2 Remarks Color of background White Black 3 o clock 3 o clock Position of crown 3 o clock 3 o clock Posi...

Page 6: ...1 10 second hand turns clockwise and then return to where they were 3 Press button A or B to reset the stopwatch hands to 0 position By pressing button A set the stopwatch 1 10 second hand By pressing...

Page 7: ...ll 31 SETTING stem Reference The power of press hands Minute Hour Hands 5kg Second Hand 5kg Chrono Minute Second Hands 3kg 23 BATTERY While pushing the indented portion of the arrow pull out the setti...

Page 8: ...tained and then read the measurement 4 Make sure the read value is less than 2 2 A How to measure the current consumption for the whole movement How to measure the current consumption for the CIRCUIT...

Page 9: ...e resistance of each coil block if they are within the range in the following table 1 0 K 1 2 K 1 28 K 1 48 K COIL BLOCK A COIL BLOCK B 4002904 4002923 Structure of the CIRCUIT BLOCK Input terminal In...

Page 10: ...pped DISPLAY AND CROWN BUTTON OPERATION 2 Turn the crown clock wise until the previous day s date appears 3 Pull out the crown to the second click when the second hand is at the 12 o clock position It...

Page 11: ...TOPWATCH A B A Stopwatch 1 10 second hand STOP RESET Game over Accumulated elapsed time measurement Ex Basketball game Press the buttons in the following order A A A A B START STOP Start of game Time...

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