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This is a genuine Ronda Caliber Z60 circuit block electronic module, the core control unit of the popular xtratech quartz chronograph movement. It integrates the quartz oscillator and CMOS integrated circuit to generate precise stepper motor pulses, driving the complex chronograph functions including central stop second, 30-minute counter, small second, day, and date displays. As an original Ronda OEM component, this module is the ideal aftermarket replacement for repairing faulty electronics in Z60‑powered watches without replacing the entire movement.
Integrated CMOS Quartz Circuit: Combines quartz oscillator and logic IC for accurate 32,768 Hz timing.
Multiple Chronograph Support: Drives central chronograph seconds, 30‑minute counter, day and date wheels, and small seconds hand.
Direct Replacement OEM Part: Designed to Ronda‘s exact specifications; drops into Caliber Z60 with no modification.
Low Power Consumption: Uses a 395 silver oxide battery (1.55V) rated for approx. 50 months of typical operation.
Hacking (Power‑Saving) Feature: Stops the second hand when the crown is pulled out, reducing power consumption by ≈70%.
| Parameter | Details |
|---|---|
| Caliber / Part | Ronda Z60 circuit block electronic module |
| Movement Type | Quartz chronograph, battery‑powered |
| Ligne Size | 13 ¼ ”’ (30.60 mm) |
| Diameter (casing) | 30.0 mm |
| Height | 4.60 mm |
| Battery Cell | 395 (SR927SW) / 1.55 V |
| Battery Life | ≈ 50 months (fresh battery) |
| Accuracy | –10 / +20 seconds per month (0 – 50 °C) |
| Jewel Count | 0 jewels (nickel‑plated) |
| Functions | Central hours / minutes; central chronograph seconds; small seconds at 2:00; 30‑minute counter at 6:00; day of the week at 10:00; date at 4:00 |
| Hacking | Yes (stops second hand when crown is pulled) |
| Country of Manufacture | Switzerland (Swiss made / Swiss parts versions) |
Aftermarket replacement for a failed electronic module (circuit block) in Ronda Caliber Z60 quartz chronograph movements.
Ideal for repairing watches that do not run, have erratic chronograph reset, or show no pulse output after battery replacement.
Fits all watch models originally equipped with the Ronda Z60 13 ¼ ”’ xtratech movement, including many Invicta, Harley, Energy, and other fashion chronographs.
1. Is this a genuine Ronda Z60 electronic module, and what causes a module to fail?
Yes, this is a genuine Ronda Z60 circuit block — the electronic brain of the movement. Common causes of module failure include: battery leakage corroding the PCB, water ingress causing short circuits, electrostatic discharge (ESD) damaging the CMOS IC, or physical damage to the board or coil during handling.
2. How do I know that the electronic module (rather than the coil) needs replacement?
Use a multimeter to measure the coil resistance (a Z60 coil typically reads 300–400 Ω). An infinite (open) reading indicates a faulty coil. If the coil resistance is normal but the movement still does not run with a fresh battery, the circuit block is the likely culprit. A timing machine can confirm whether stepping pulses are reaching the motor.
3. What should I pay attention to when installing a new Z60 electronic module?
Disconnect the battery before handling. Align the new circuit block with the mainplate’s locating pins and contact pads, ensuring the coil leads make good contact with the PCB pads. Use non‑magnetic tweezers and observe anti‑static precautions. After installation, the stepper motor rotor should spin freely by hand. Professional help is strongly recommended for inexperienced users.
4. Will the chronograph hands reset correctly after changing the electronic module?
Normally, replacing the module with an identical OEM part does not require re‑calibration of the chronograph hands. However, if the central chronograph seconds hand does not reset to exactly 12 o‘clock, follow the adjustment procedure in the Ronda Z60 user manual. This is typically corrected by a specific sequence of button presses, not by the module itself.
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