Ronda Caliber 7004 Circuit Block Electronic Module

Quantity	Discount (%)	Price
1 - 4	—	$22.00
5 - 14	5 %	$20.90
15+	10 %	$19.80

Quantity

Discount (%)

Price

1 - 4

—

$22.00

5 - 14

5 %

$20.90

15+

10 %

$19.80

Product Description

This is a genuine circuit block / electronic module for the Ronda 7004 series quartz chronograph movement, part number 3612.306.RK. Its function is to accurately generate a 32768 Hz time base signal, which is divided by a microprocessor (IC) to drive a stepper motor, thereby directly controlling the gear train. As a core component of the Mastertech 7000 series, this factory-original Ronda module is especially suitable for repairing 7004 movements that have failed due to water ingress, battery leakage corroding the circuit board, or aging electronic components, eliminating the need to replace the entire movement.

Key Features & Function

Genuine Ronda Part – Factory‑original, not a copy or generic component, ensures perfect fit for 7004 movements.

Precision Time Base – Built‑in 32,768 Hz quartz crystal oscillator for high accuracy.

Integrated Microprocessor (IC) – Divides the time base signal and generates precise stepping motor pulses.

Stepper Motor Control – Directly drives the gear train, controlling seconds hand and chronograph functions.

Cost‑Effective Repair – Replaces only the faulty circuit board instead of the entire movement, saving costs.

Specifications

Parameter	Details
Part Name	Circuit Block / Electronic Module
Part Number	Ronda 3612.306.RK
Compatible Movement	Ronda Caliber 7004 quartz chronograph (Mastertech 7000 series)
Frequency	32,768 Hz
Function	Generates stepping motor pulses for timekeeping and chronograph control
Origin	Switzerland
Condition	Brand new, genuine

Applications

Ronda 7004 quartz chronograph movement (common in sports chronographs and multi‑function watches).
Repair of non‑running movements, failed chronograph functions, or no pulse output after battery replacement.
Particularly suitable for failures caused by water ingress, battery leakage corroding the PCB, or aged electronic components.
Professional watch workshops, brand service centers.

Frequently Asked Questions

1. Is this a genuine Ronda circuit board?
Yes. It is a Swiss factory‑original part (3612.306.RK) for the 7004 movement, not a copy.

2. How can I tell if the circuit block needs replacement?
Symptoms: the movement does not run with a fresh battery; no pulse output detected on a timing machine; visible corrosion on the PCB due to moisture or battery leakage.

3. What should I pay attention to during installation?
Disconnect the battery first. Align the circuit block with the locating pins and contact pads, ensuring good contact between the metal springs and coil leads. Use non‑magnetic tweezers and anti‑static precautions. Professional installation is recommended.

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. Is this module compatible with all Ronda 7004 variants?
The Ronda 7004 family may have different calendar configurations, but the circuit block is generally universal. Verify the original PCB shape and contact layout. Consult the seller if unsure.