11
TECHNICAL GUIDE
Cal. 5M42A, 5M43A
•
Measuring the current consumption for the whole movement
1) Connect the tester as shown in the illustration.
•
Checking the automatic generating system
1) Apply the probes of the tester to the capacitor unit as shown in the illustration to measure the voltage.
Remarks:
When the current consumption exceeds the standard value for the whole movement but is within the
standard value range for the circuit block alone, the watch is generating a driving pulse to compensate
for the heavy load that may be applied to the gear train, etc.
In this case, overhaul and clean the movement parts and then measure current consumption for the
whole movement again.
Connect the tester to the input terminals (+) and (-) of the circuit block, and wait for 30 to 40 seconds before
starting measurement.
•
Measuring the current consumption for the circuit block alone
2) Start the measurement 30 to 40 seconds after connecting the tester, checking that a stable measure-
ment is obtained.
3) When measuring, look through the upper hole jewel for step rotor ( ␣
A
␣ in the illustration), to check that
the step rotor is rotating at one-second intervals.
Note:
If a stable measurement is not obtained for the current consumption, temporarily tighten the
capacitor clamp screws at the hole B and then measure the current consumption again.
+
–
+
–
+
–
S-840A
MA-40A
A
B
+
–