Seiko V157A - Instant-Start Function; Checking Instant-Start Function

TECHNICAL GUIDE
Cal. V157A/V158A
15/18
l CHECKING THE INSTANT-START FUNCTION
The instant-start function works when the voltage of the rechargeable battery is more than 0.9V.
Therefore, please measure the battery voltage and make sure that the battery is ready for checking
the instant-start function.
* When measuring the voltage of the rechargeable
battery, connect the (-) probe to the RECHARGEABLE
BATTERY UNIT SCREW and (+) probe to the wa CIRCUIT
BLOCK COVER as illustrated in Fig. 8.
<How to check the instant-start function>
1) Place the watch which stops working at a distance of
50 cm under the fluorescent lamp of 15 to 20 watts
(Fig. 9.)
2) Check if the second hand of the watch starts moving
at 2-second intervals within 10 seconds.
+
‒
FLUORESCENT LAMP
50 cm
Fig. 9
Fig. 8