Technical Guide; Troubleshooting - Seiko 5M84A Parts List/Technical Manual

TECHNICAL GUIDE

TROUBLESHOOTING

Problems
The OSCILLATING WEIGHT
rotates at an abnormally high
rate, and no charging is made.
The OSCILLATING WEIGHT
will not rotate.
The current consumption for
the whole of the movement
exceeds the standard value.
The current consumption for
the CIRCUIT BLOCK alone
exceeds the standard value.
Possible causes
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) 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) 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) 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.
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Methods of repair and checking
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.)
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.)
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.
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