Supu 700D Qi Xing 747 Overlock Sewing Machine Control Board PCB

The PCB works with compatible Silstar, Latino, Novel, Magneto, Zoje, Fucen, New Expert, and other Chinese industrial overlock machines that use the matching Qi Xing / SUPN control box system. It supports compatible high-speed 3-thread, 4-thread, and 5-thread overlock machines used for garment production and edge finishing.

Pack Quantity: 1 Piece

What Does This Qi Xing Overlock PCB Do?

The Qi Xing motherboard processes signals between the control box, motor, sensors, and other electronic components. It regulates motor speed and helps the machine respond correctly to electronic control inputs.

On compatible machines, the PCB also manages functions such as automatic thread trimming, foot lifting, and sensor response. The 220V design supports compatible Qi Xing / SUPN Auto and NF Series control systems.

Key Features

• Qi Xing electronic control motherboard for compatible industrial overlock machines
• Supports compatible 3-thread, 4-thread, and 5-thread overlock systems
• Works with matching 220V Qi Xing / SUPN Auto and NF Series control systems
• Regulates motor speed and electronic machine functions
• Controls automatic thread trimming on compatible machines
• Supports foot-lifting control when the machine includes this function
• Uses an integrated logic microprocessor for electronic control
• Uses heavy-duty 220V smoothing capacitors to filter the DC bus voltage
• Aluminum heatsink helps dissipate heat from power components during operation
• Insulated components help protect the circuit from vibration, dust, and electrical noise
• Multi-pin connectors provide direct connections to compatible control-box wiring
• Pack includes 1 electronic motherboard PCB

Machine Compatibility

This motherboard supports industrial overlock machines that use the matching Qi Xing / SUPN electronic control configuration.

*Check the original PCB, control box, connector layout, and machine configuration before ordering.

Please verify the shape, connector layout, markings, and measurements of your existing motherboard before purchasing.

Best Fabric Types

The motherboard controls the machine’s electronic functions rather than contacting the fabric directly. Your overlock machine setup determines which fabrics you can sew.

Compatible industrial overlock machines can handle applications involving:

• Cotton – garment seams and edge finishing
• Polyester – apparel and synthetic fabric production
• Silk – when the machine uses the appropriate sewing setup
• Light knits – seam finishing and overlocking
• Denim and heavier textiles – when the specific machine configuration supports them
• Other garment fabrics – according to the machine’s specifications

Why Choose This Replacement PCB?

A damaged motherboard can cause problems with motor response, speed control, sensor signals, thread trimming, and other electronic functions. A correctly matched replacement PCB can restore these functions without requiring you to replace the complete control-box assembly.

The board also provides a practical replacement option for tailoring units, garment workshops, and production facilities that need to keep compatible industrial overlock machines running.

How To Install the Qi Xing Control Board

1. Switch off the machine and disconnect the 220V power supply.
2. Open the control box according to the machine manufacturer’s service procedure.
3. Photograph or label each cable connection before removing the original PCB.
4. Compare the original board with the replacement PCB.
5. Check the markings, connectors, wiring, and mounting points.
6. Disconnect the original motherboard carefully.
7. Position the new Qi Xing PCB correctly inside the control box.
8. Connect each cable to its matching connector.
9. Inspect all connections before restoring power.
10. Start the machine at low speed and test its functions before production.

A qualified sewing machine technician should install this PCB because the board handles electrical and electronic control functions.

Frequently Asked Questions

What is a Qi Xing overlock sewing machine motherboard?

A Qi Xing overlock motherboard is the main electronic PCB that controls compatible industrial overlock machine functions. It processes signals from the motor, sensors, and control system to manage speed and other electronic operations such as thread trimming or foot lifting when supported by the machine.

Which machines can use this Qi Xing control board?

This PCB is designed for compatible Silstar, Latino, Novel, Magneto, Zoje, Fucen, New Expert, and other Chinese industrial overlock machines using the matching Qi Xing / SUPN control configuration. Always compare your original PCB and connectors before ordering.

Is this PCB suitable for 3-thread, 4-thread and 5-thread overlock machines?

Yes, the supplied specification covers compatible high-speed 3-thread, 4-thread, and 5-thread industrial overlock machines. The machine must use the corresponding Qi Xing / SUPN electronic control system and matching wiring configuration.

Is this a complete overlock control box?

No. This product contains the electronic motherboard PCB only. It does not include a complete control box, motor, machine head, or other components unless specifically listed with the product.

Does this Qi Xing motherboard use 220V?

Yes, this motherboard is specified for compatible 220V Qi Xing / SUPN Auto or NF Series overlock control systems. Confirm the voltage and control-box configuration of your existing machine before installation.

How do I check compatibility before buying?

Compare the original motherboard with the replacement PCB. Check the PCB markings, connector positions, wiring plugs, mounting arrangement, control-box series, and machine model. If these details do not match, verify compatibility before placing your order.