+
5075
X|O|X
X|X|O
OX
21
TECHNICAL GUIDE
Cal. 4F32A, 8F32A, 8F33A, 8F35A
● Time accuracy
• The tim e accuracy m easurement should be m ade in an environm ent w ith the tem perature at the range
of 23° C ± 2° C and hum idity betw een 50% and 60%.
Normal loss/ gain at a normal temperature (23° C) : +0.020 ~ +0.140 sec./ day
[A] Check the loss/gain of the w atch w ith the case back closed follow ing the procedure below , and
determine the m ethod of adjustment and repair.
Measuring procedure Measured loss/ gain (–/ +) Method of adjustment/ repair
1 Set the gate of the quartz tester
to “ 10” .
2 Pull the crow n to the second
click to stop the second hand.
3 Place the w atch on the
microphone with its 3 o’clock
side up, and read the loss/gain.
Norm al : +0.020 ~ +0.140
Defective : –0.012 ~ +0.019
+0.141 ~ +0.204
Defective : –0.013 or sm aller
+0.205 or greater
➡
Tim e accuracy adjustm ent is
not necessary.
➡
Adjust the time accuracy.
➡
Replace the circuit block w ith
a new one.
Check the tim e accuracy.
(Then, adjust the tim e accuracy.)
➡➡
[B] Time accuracy adjustment by pattern cutting
Cut and remove the overhanging pattern with tweezers to adjust the
tim e accuracy.
Notes:
* The loss/gain indicated by the tester varies slightly from measurement to measurement. Therefore,
make several m easurements to get an average loss/gain.
* When m easuring tim e accuracy, leave the watch untouched for 30 minutes after it is placed on the
microphone. Then, start the m easurement.
Notes:
* After cutting the pattern, check that it is com pletely detached.
* Take care not to let the cut pattern get inside the m ovement.
Pattern cutting combination and adjustment range
By cutting one or both of the patterns P1 and P2, the loss/gain of
the watch can be adjusted by an am ount betw een –0.064 and
+0.032 sec./day.
: Cut
: Connected
Pattern
P2 P1
Am ount of loss/gain
from base accuracy
–0.064
–0.032
+0.032
Note: Once the patterns are cut off, reconnecting them by soldering m ay not adjust the loss/gain by
the amount specified in the table above and may also change the tem perature characteristics
of the w atch. Adjust the loss/gain, therefore, only by cutting the patterns.
P2P1
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