Seiko 5M84A - Technical Guide - Troubleshooting; Oscillating Weight Issues; Current Consumption Issues

Problems Possible causes Methods of repair and checking
The OSCILLATINGWEIGHT
rotates at an abnormally high
rate,andnochargingismade.
1) The COIL of the
GENERATINGCOILBLOCK is
broken.
2) The pivot of the
GENERATINGROTOR is
broken. (The pinion of the
GENERATINGROTORand the
gear of the INTERMEDIATE
WHEELFORGENERATING
ROTOR are out of mesh.)
1) Check the resistance of the
GENERATINGCOILBLOCK.
Replace the GENERATINGCOIL
BLOCK if the COIL is broken.
2) Remove the broken piece of the
GENERATINGROTOR,andreplace
and lubricate the GENERATING
ROTOR. (Overhaul and clean if
necessary.)
The OSCILLATINGWEIGHT
will not rotate.
1) The gear of the
OSCILLATINGWEIGHT and
the pinion of the
INTERMEDIATEWHEELFOR
GENERATINGROTOR are out
of mesh.
2) The pivot of the
GENERATINGROTOR is
broken. (The pinion of the
GENERATINGROTOR and the
gear of theINTERMEDIATE
WHEELFORGENERATING
ROTOR engage with each
other.)
1) If the gear of the OSCILLATING
WEIGHT and the pinion of the
INTERMEDIATEWHEELFOR
GENERATINGROTORareintact,
reassemble them to the movement.
2) Remove the broken piece of the
GENERATINGROTOR,andreplace
and lubricate the GENERATING
ROTOR. (Overhaul and clean if
necessary.)
The current consumption for
the whole of the movement
exceeds the standard value.
1) When the measurement is
made,theICisstillinthe
quickstartmode.(Whenthe
current consumption
measuresabout200μA,itis
likelythattheICisinthequick
start mode.)
2) The load applied on the
geartrain,etc.hasincreased,
and the driving pulse to
compensate it has been
generated.
1)Afterconnectingthetester,move
the OSCILLATINGWEIGHT more
quicklyforalongerperiodoftime,
andthen,makethemeasurement
again.
2) If the current consumption for
the CIRCUIT BLOCK alone is within
thestandardvaluerange,overhaul
andcleanthemovementparts,and
then,makethemeasurementagain.
The current consumption for
the CIRCUIT BLOCK alone
exceeds the standard value.
1) The light from outside the
movement is affecting the
measurement.
2) When the measurement is
made,theICisstillinthe
quickstartmode.(Whenthe
current consumption
measuresabout200μA,itis
likelythattheICisinthequick
start mode.)
3) The IC is out of order.
1)Shutoutthelight,andmakethe
measurement again.
2)SwitchtheICtothenormal
mode,andmakethemeasurement
again.
3) Replace the CIRCUIT BLOCK.
Cal. 5M84A
21/21
TECHNICAL GUIDE
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