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This is a genuine Ronda 753 circuit block electronic module (Part No. 4000 / 3612.163) , a Swiss-made component for the Ronda 753 three-hand quartz movement. It serves as the core control component of the movement, integrating a 32,768Hz quartz oscillator and CMOS integrated circuit to generate precise time signals for the stepper motor. This product is brand new and original, intended for repairing movements that fail to run due to circuit failure.
Brand：Ronda (Swiss)
Part Number：4000 / 3612.163
Compatible Movement：753 three-hand quartz caliber (5½ × 6¾ ligne)
Origin：Swiss Made (5 jewels, gilt) / Swiss Parts (1 jewel, nickel)
Quality：Genuine original, brand new
Function：Generates and processes time signals, drives stepper motor
1. Is this circuit module an original Ronda genuine part?
Yes. It is an original Ronda factory part (Part No. 4000 / 3612.163) from Switzerland, designed for the 753 three-hand movement.
2. Which movements is this circuit module compatible with?
It fits the Ronda 753 three-hand quartz caliber (5½×6¾ ligne, approx. 13.00×15.55mm, 2.50mm height). The 753 is a three-hand, no-date movement belonging to Ronda’s Normtech product line. The coil block (4060) is interchangeable with 751/753/762/763, but the circuit module differs. Verify your movement model before installation.
3. What are the symptoms of circuit module failure?
The circuit module is the core control component of the movement. Common symptoms include: movement not running after battery replacement, noticeable time gain/loss, or intermittent stoppage. The 753 offers accuracy of -10/+20 seconds/month with a battery life of approximately 27-36 months. A seconds hand jumping every 4 seconds indicates the EOL battery warning. Timely replacement is recommended.
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