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This is a genuine circuit block electronic module for the MIYOTA/CITIZEN 9T13, 9T33, and 9U13 quartz movements. The module integrates a quartz oscillator and CMOS integrated circuit, generating a precise 32,768 Hz time base frequency to drive the stepper motor for accurate hour, minute, seconds, and calendar functions. As an original OEM replacement part, it provides a direct solution for repairing movement failures caused by water ingress, battery leakage, or aging electronic components.
Genuine MIYOTA Part – Japanese factory-original for 9T13/9T33/9U13, not a copy, ensuring perfect fit.
High-Precision Time Base – Integrated 32,768 Hz quartz oscillator provides a stable and reliable time reference.
Multi-Function Support – Drives hour, minute, seconds hands and calendar (date/day, depending on version).
Low-Power CMOS Circuit – Delivers ultra-long battery life with the appropriate battery.
Cost-Effective Repair – Replace only the faulty circuit board instead of the entire movement, offering significant cost savings.
| Parameter | Details |
|---|---|
| Part Name | Circuit Block / Electronic Module |
| Compatible Movements | MIYOTA/CITIZEN 9T13, 9T33, 9U13 quartz |
| Movement Size | 9T13/9T33: approx. 13.0×15.2 mm (5½‴×6¾‴); 9U13: approx. 15.3×17.8 mm (6¾‴×8‴) |
| Movement Height | Approx. 2.0 mm (varies slightly by model) |
| Frequency | 32,768 Hz |
| Battery Type | 9T13/9T33: SR626SW (377); 9U13: SR920SW (371) |
| Functions | Hour, minute, seconds, calendar (depending on version) |
| Origin | Japan |
| Condition | Brand new, genuine |
MIYOTA/CITIZEN 9T13, 9T33, 9U13 quartz movements (common in mid-to-low-end three-hand quartz watches, e.g., Seiko, Citizen, Casio).
Repair of non-running movements, inaccurate timekeeping, non-advancing date, or no response after battery replacement.
Particularly suitable for failures caused by water ingress, battery leakage corroding the PCB, or aged electronic components.
Professional watch workshops, DIY enthusiasts.
1. Is this a genuine MIYOTA circuit board?
Yes. It is a Japanese factory-original part for 9T13, 9T33, and 9U13 movements, not a third-party copy.
2. Are the circuit boards for 9T13, 9T33, and 9U13 interchangeable?
No. 9T13 and 9T33 share the same dimensions and are interchangeable; the 9U13 is larger and uses a different circuit board. Verify the original PCB shape and size.
3. How can I tell if the circuit board needs replacement?
Symptoms: the movement does not run with a fresh battery; no pulse output detected on a timing machine; date does not advance (non-mechanical fault); visible corrosion on the PCB due to moisture or battery leakage.
4. Does the new circuit need calibration after installation?
No. Timekeeping accuracy is determined by the quartz crystal. New factory circuits are pre-calibrated to standard accuracy. A timing machine check is optional but recommended.
5. What should I pay attention to during installation?
Disconnect the battery before handling. Align the circuit block with the locating pins and contact pads on the mainplate, ensuring good contact between the metal springs and the coil leads. Use non-magnetic tweezers and anti-static precautions. Professional installation is recommended.
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