---
description: Genuine Ronda 505/515 circuit module, Swiss made. Core control for 10½/11½ ligne movements, generates quartz signal for stepper motor, fits 371 battery.
title: Ronda 505/515 Circuit Block Electronic Module - Sofly
image: https://www.soflypart.com/wp-content/uploads/2019/05/505C.jpg
---
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- **Ronda 505/515 Circuit Block Electronic Module**
[](https://www.soflypart.com/wp-content/uploads/2019/05/505C.jpg)
[](https://www.soflypart.com/wp-content/uploads/2019/05/505CB.jpg)
# Ronda 505/515 Circuit Block Electronic Module
$4.00
You Saved
| Brand | Choose an option Ronda- 
Clear |
| --- | --- |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 4 | — | $4.00 |
| 5 - 9 | 5% | $3.80 |
| 10+ | 10% | $3.60 |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 4 | — | $4.00 |
| 5 - 9 | 5% | $3.80 |
| 10+ | 10% | $3.60 |
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## Product Description
This is a **genuine Ronda 505/515 circuit block electronic module**, a **Swiss-made** component for Ronda 505/515 quartz movements. It serves as the **core control component**, generating precise 32,768Hz quartz oscillation signals to drive the stepper motor for accurate timekeeping. The module is also **compatible with 507, 513, and 517** calibers. This product is **brand new and original**, intended for repairing movements that fail to run due to circuit failure.
## Specifications
- **Brand**：Ronda (Swiss)
- **Compatible Movements**：**Ronda 505 / 515 / 507 / 513 / 517** series quartz calibers
- **Part Number Reference**：**3612.198.RK** / **4000**
- **Origin**：**Swiss Made**
- **Quality**：**Genuine original**, brand new
- **Function**：**Generates and processes time signals** for stepper motor
## FAQ
**1. Is this circuit module an original Ronda genuine part?**
**Yes**. It is an **original Ronda OEM part**, not a third-party copy.
**2. Which movements is this circuit module compatible with?**
It fits **Ronda 505 and 515 series quartz movements**, and is also compatible with **507, 513, and 517** calibers. The 505 measures **10½ ligne** (23.90mm), and the 515 measures **11½ ligne** (26.20mm).
**3. How do I check if the circuit module is faulty?**
Typical symptom: **movement not running after battery replacement**. Use a multimeter to measure coil resistance—normal range is between **a few hundred and two thousand ohms**. An “OL” reading (open circuit) or significant deviation indicates a faulty coil. The coil is **exposed near the battery clip** and can be easily scratched during battery replacement, causing failure.
## Why Choose SOFLY Watch Parts?
**Fast Worldwide Shipping** – Orders are dispatched within 3 business days.
**Competitive Pricing** – Great value across watch movements, replacement parts and watchmaking tools.
**Extensive Selection** – More than 3,000 watch movements, parts and accessories available.
**Trusted Worldwide** – Trusted by watchmakers, repair professionals and watch enthusiasts worldwide.
**Personalized Sourcing** – Can’t find the part you need? Contact **info@soflypart.com** or WhatsApp **+86 18620212114.**
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It serves as the\u00a0core control component, generating precise 32,768Hz quartz oscillation signals to drive the stepper motor for accurate timekeeping. The module is also\u00a0compatible with 507, 513, and 517\u00a0calibers. This product is\u00a0brand new and original, intended for repairing movements that fail to run due to circuit failure. Specifications Brand\uff1aRonda (Swiss) Compatible Movements\uff1aRonda 505 / 515 / 507 / 513 / 517\u00a0series quartz calibers Part Number Reference\uff1a3612.198.RK\u00a0/\u00a04000 Origin\uff1aSwiss Made Quality\uff1aGenuine original, brand new Function\uff1aGenerates and processes time signals\u00a0for stepper motor FAQ 1. Is this circuit module an original Ronda genuine part? Yes. It is an\u00a0original Ronda OEM part, not a third-party copy. 2. Which movements is this circuit module compatible with? It fits\u00a0Ronda 505 and 515 series quartz movements, and is also compatible with\u00a0507, 513, and 517\u00a0calibers. 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Personalized Sourcing\u00a0\u2013 Can\u2019t find the part you need? Contact\u00a0info@soflypart.com\u00a0or WhatsApp\u00a0+86 18620212114.","image":"https://www.soflypart.com/wp-content/uploads/2019/05/505C-150x150.jpg","offers":{"@type":"Offer","description":"Product Description This is a\u00a0genuine Ronda 505/515 circuit block electronic module, a\u00a0Swiss-made\u00a0component for Ronda 505/515 quartz movements. It serves as the\u00a0core control component, generating precise 32,768Hz quartz oscillation signals to drive the stepper motor for accurate timekeeping. The module is also\u00a0compatible with 507, 513, and 517\u00a0calibers. This product is\u00a0brand new and original, intended for repairing movements that fail to run due to circuit failure. 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