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This is a generic coil block for the TMI/Seiko VX11 quartz movement, serving as the core drive component of the stepper motor. It consists of precision copper windings and a core, responsible for converting electrical pulses from the circuit board into magnetic force to drive the rotor, which then turns the gear train. When the original movement‘s coil suffers an open circuit, short circuit, moisture corrosion, or physical damage, replacing it with this new coil assembly is the most direct and effective solution to restore timekeeping.
Generic Replacement – Designed for VX11 movements; non‑original but functionally equivalent, cost‑effective.
Precision Coil Construction – Quality copper wire and core ensure efficient electromagnetic conversion.
Direct Replacement – Matches original coil interface and mounting holes; no modification needed.
Fixes Common Issues – Solves movement stoppage caused by coil failure.
Wide Application – Fits many watch brands using VX11 (e.g., Seiko, Timex).
| Parameter | Details |
|---|---|
| Compatible Movement | Hattori / TMI / Seiko VX11 quartz |
| Type | Generic aftermarket (not genuine) |
| Function | Stepper motor coil – converts electrical pulses to magnetic force |
| Typical Failures | Open circuit, short circuit, corrosion, physical damage |
| Installation | Direct replacement of original coil |
1. Is this a genuine Hattori coil?
No. This is a generic aftermarket replacement, not original, but fully compatible with VX11 coil dimensions and connections.
2. How can I tell if the coil needs replacement?
Symptoms: fresh battery but movement does not run. Measure coil resistance with a multimeter – normal range is a few hundred to over 1000 ohms. Infinite reading (open) or significant deviation indicates a bad coil.
3. What should I pay attention to during installation?
Disconnect the battery first. Align the coil with the locating pins on the mainplate, ensuring electrical contact. Use non‑magnetic tweezers, avoid static. The rotor should spin freely after installation. Professional help recommended.
4. Does the new coil require calibration?
No. Accuracy is determined by the quartz crystal on the circuit board. However, check pulse output with a timing machine to confirm normal operation.
5. Which specific movements does this coil fit?
It fits TMI/Seiko VX11 series quartz movements (including VX11, VX12, etc. – two‑hand or three‑hand variants). Not compatible with VX32, VX42 or other non‑VX1X calibers.
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