The Jack A2-CZ 9950014900 motherboard PCB is a replacement main control board for compatible Jack A2-series direct-drive single-needle lockstitch sewing machines. Current spare-parts references identify 9950014900 as the PCB control board for Jack A2-CZ, while Jack parts listings also associate the number with the A2C/A2-CZ control-board configuration.

This PCB serves as the electronic control centre of the compatible machine. Depending on the machine configuration, it coordinates signals between the direct-drive motor, operation controls, sensors, needle-position system and automatic thread-trimming components.

The most important point when replacing this type of board is matching the exact PCB version. Jack A2 machines can use different control-board generations. For example, current parts references list 19510031200 for A2B and 9950014900 for A2C/A2-CZ.

Therefore, check your existing PCB number and connector arrangement before ordering.

Key Features

• Part Number: 9950014900
• PCB Type: Main control board
• Primary Application: Jack A2-CZ / A2C direct-drive machines
• Machine Type: Single Needle Lock Stitch Machine
• Application: Electronic machine control
• Pack Quantity: 1 Piece
• Replacement Use: Suitable for compatible PCB replacement and machine servicing

The board is designed for machines using the corresponding 9950014900 configuration. A current Jack parts catalogue also lists Jack PCB A2-CZ 9950014900, while another Indian spare-parts supplier identifies it as a Jack CZ PCB for the A2 single-needle lockstitch model.

Jack A2-CZ 9950014900 Compatibility

The strongest available evidence supports the following applications:

• Jack A2-CZ ✓
• Jack A2C ✓
• Jack A2 Series — only where the machine uses the 9950014900 PCB configuration

Some current product references also associate the board with A2-CQ and A2S configurations, but these should be verified against the original PCB before purchase because A2-series electronic configurations can vary.

Please verify the PCB model, part number and connector arrangement of your existing board before purchasing.

What Does the Jack A2-CZ PCB Control?

The main PCB works as the central electronic control board inside the machine’s control system.

Depending on the machine configuration, it can coordinate functions such as:

• Direct-drive motor control
• Sewing-speed response
• Needle-position signals
• Automatic thread trimming
• Foot-pedal input
• Sensor signals
• Solenoid-related functions
• Communication with the machine’s operating controls

These functions work together to control the machine’s electronic operation during sewing.

However, the exact functions depend on the machine revision and connected components. Therefore, the PCB should always be matched with the correct machine configuration.

A2-CZ vs A2B PCB

This is an important point when purchasing a replacement.

Jack A2 machines can use different PCB generations. Current parts information identifies:

Although both boards perform main-control functions, you should not assume that an A2B board can directly replace an A2C/A2-CZ board.

Before ordering, compare:

• PCB part number
• Board label
• Connector arrangement
• Machine model
• Existing wiring
• PCB version

This simple check can help prevent ordering the wrong control board.

When Should You Replace the PCB?

A replacement motherboard may be required when the original board has been diagnosed as faulty or has suffered component or electrical damage.

Possible symptoms can include:

• Motor control problems
• Machine control malfunction
• Automatic thread trimming not responding
• Needle-positioning problems
• Control-panel communication issues
• Visible PCB damage
• Damaged connectors

However, these symptoms do not automatically mean that the motherboard has failed. Wiring, sensors, pedals, motor components and other electronic parts can also cause similar problems.

Therefore, diagnose the machine before replacing the PCB.

Important Compatibility Information

Do not select this PCB only because you have a Jack A2 machine.

Instead, check the number printed directly on your existing board. The 9950014900 reference is the key identification point for this replacement.

Also, check the connector layout before installation.

If your existing PCB has a different part number, such as 19510031200, please verify the correct board rather than assuming the two versions are interchangeable.

Please verify the shape, part number and connector configuration of your existing PCB before purchasing.

Related StitchPartner Products

For additional machine electronics, browse sewing machine motherboard and PCB parts.

You can also explore industrial sewing machine spare parts for other Jack machine components.

 MACHINE COMPATIBILITY TABLE

 HOW TO USE

1. Switch off the sewing machine.
2. Disconnect the machine from the electrical supply.
3. Open the control-box or PCB access area according to the machine service procedure.
4. Photograph the existing wiring before removing anything.
5. Locate the part number printed on the original PCB.
6. Confirm that it corresponds to 9950014900.
7. Compare the connector arrangement with the replacement board.
8. Disconnect the original PCB carefully.
9. Install the replacement PCB in the correct position.
10. Reconnect each cable to its corresponding socket.
11. Check that every connector is fully seated.
12. Close the control housing securely.
13. Restore power.
14. Test the machine at low speed.
15. Check motor operation, needle positioning and thread trimming where applicable.

If you are not experienced with electronic sewing-machine repairs, have the PCB installed by a qualified technician.

 FREQUENTLY ASKED QUESTIONS

What is Jack 9950014900 PCB?

9950014900 is a main PCB/control-board reference associated with the Jack A2C/A2-CZ direct-drive single-needle lockstitch machine configuration.

Is 9950014900 compatible with Jack A2-CZ?

Yes. Current spare-parts listings specifically identify 9950014900 as the PCB control board for Jack A2-CZ.

Is 9950014900 the same as the Jack A2B PCB?

No. Current parts references identify 19510031200 for A2B, while 9950014900 is associated with A2C/A2-CZ. Do not substitute one for the other without confirming the machine and PCB configuration.

What does the Jack A2-CZ motherboard control?

It acts as the machine’s main electronic control board and can coordinate motor control, speed response, needle positioning, thread trimming, sensors and other connected electronic functions, depending on the machine configuration.

Can I use this PCB on any Jack A2 machine?

No. The machine must use the corresponding 9950014900 PCB configuration. Check your existing board’s part number and connectors before purchasing.

Does this listing include the complete control box?

No. This product contains 1 motherboard PCB only. The complete machine, motor, control box, display and wiring are not included unless specifically stated in the product package.

How do I identify the correct PCB?

Check the part number printed on your existing PCB, followed by the board label and connector arrangement. For this product, the primary identification number is 9950014900.

Can an A2B PCB replace this A2-CZ PCB?

Do not assume so. A2B uses a different PCB reference, 19510031200, while A2C/A2-CZ uses 9950014900. Verify the board configuration before replacement.