उत्पाद वर्णन
Jack 781G Main PCB Control Board
The Jack 781G PCB Main Board 19950020300 is the main electronic control board used in compatible Jack 781 and 781G buttonhole sewing machines. It is designed to manage important machine-control functions and provides a practical replacement when the original circuit board is damaged or no longer operating correctly.
This replacement board is specified for the Jack 781 / Jack 781G series industrial buttonhole sewing machines, with Part No. 19950020300. Before ordering, compare the part number, board layout, connectors, and existing PCB with the product shown.
What This Jack 781G PCB Does
The main PCB acts as the electronic control center of the sewing machine. It coordinates machine functions such as motor operation, needle positioning, cycle timing, and the programmed buttonhole sewing sequence.
A faulty control board can affect normal machine operation and may require replacement rather than adjustment of mechanical components. Installing the correct PCB helps restore the electronic control system without replacing the complete buttonhole machine.
प्रमुख विशेषताऐं
- Main electronic control PCB for Jack 781/781G industrial buttonhole machines
- Part No. 19950020300, Version V1.08
- Precision electronic control for coordinated machine operation
- Controls timing between the motor, sensors, solenoids and machine functions
- Factory-matched board layout for the specified control-box wiring
- Standard plug connectors support straightforward replacement
- Designed for continuous industrial sewing-machine operation
- Pack contains 1 main PCB control board
उपयोग के मामले
This main PCB is used when the original control board in a Jack 781G buttonhole machine needs replacement. It is suitable for garment factories, tailoring units, boutique production rooms, and machine-service workshops where restoring the machine’s electronic control is more practical than replacing the complete machine.
A properly matched control board is important because the buttonhole machine depends on coordinated electronic control for functions such as motor operation, positioning and programmed sewing sequences. The 781G itself uses integrated control and step-motor functions for machine operations.
फ़ायदे
- Restores machine control: Replaces a faulty main electronic board without replacing the complete machine.
- Correct board identification: The 19950020300 V1.08 designation gives buyers a specific reference when matching the replacement.
- Stable machine operation: The board coordinates electronic signals required by the machine’s connected systems.
- Faster replacement: The pre-configured PCB layout and plug connections simplify replacement for a qualified technician.
- Suitable for production environments: Designed as a machine-specific industrial spare rather than a generic sewing-machine PCB.
- Reduces unnecessary part replacement: Replacing the main board can address electronic-control faults without changing unrelated mechanical components.
मशीन अनुकूलता
Compatible with Jack 781 and Jack 781G series industrial buttonhole sewing machines using the 19950020300 V1.08 main-board configuration.
The 781G is identified as a mechanical buttonhole machine with an integrated control box and motor system, while current spare-parts listings specifically identify 19950020300 as the part number for a 781G PCB control box.
विशेष विवरण
| विनिर्देश | विवरण |
|---|---|
| उत्पाद का प्रकार | Main PCB Control Board |
| मशीन का प्रकार | Industrial Buttonhole Machine |
| Compatible Machine | Jack 781 / 781G |
| Part Number | 19950020300 |
| PCB Version | V1.08 |
| समारोह | Main electronic machine control |
| Installation | Control-box replacement |
| Connector Type | Standard machine plug connectors |
| पैक मात्रा | 1 टुकड़ा |
का उपयोग कैसे करें
First, switch off the machine completely and disconnect the power supply before opening the control box.
Next, photograph or mark the existing wiring and connector positions so each connection can be returned to its original location.
Then, disconnect the old PCB, remove its mounting points, and install the replacement 19950020300 V1.08 board in the same position. Reconnect each plug according to the original wiring arrangement.
Finally, close the control box, inspect all connections, restore power, and test the machine’s basic functions before returning it to production. Electrical PCB replacement should be carried out by a qualified sewing-machine technician.
पूछे जाने वाले प्रश्न
Is this PCB compatible with the Jack 781G buttonhole machine?
Yes. This PCB is specified for the Jack 781/781G industrial buttonhole machine using the 19950020300 V1.08 main-board configuration. Check the part number and board version against your existing PCB before ordering because different 781-series electronic boards are available. Current spare-parts listings also identify 19950020300 specifically with the 781G control box.
What is the part number of this Jack 781G PCB?
The part number is 19950020300, with board version V1.08. Matching the complete part number is more reliable than purchasing a PCB only because it is described as a “781G board.” Listings for 781G replacement boards show multiple PCB/control-board products, so buyers should compare the existing board marking before purchase.
Does this replace the complete Jack 781G control box?
No. This product is the main PCB/control board, not necessarily the complete external control-box assembly. It is intended to replace the electronic board inside the specified control-box system. Confirm that your existing control box, connectors and board configuration match before installation.
Can I install the PCB myself?
PCB replacement should be performed by a qualified sewing-machine technician. The job requires disconnecting mains power, identifying the existing connectors, removing the old board and reconnecting the replacement correctly. Incorrect wiring can damage the PCB or other electronic components, so connector positions should be documented before removal.
What problems can indicate a faulty main PCB?
Electronic faults can appear as abnormal machine operation, loss of motor/control response, incorrect sequencing or failure of connected electronic functions. However, these symptoms can also come from wiring, sensors, power-supply components, switches or motors. A technician should diagnose the machine before replacing the main PCB rather than assuming every electronic fault is a board failure.
Does this PCB control the buttonhole sewing sequence?
The main control system coordinates electronic machine functions and timing required for the buttonhole operation. Buttonhole machines use electronic control systems to coordinate sewing and associated functions, including machine positioning and auxiliary operations.
Is this the same as the Jack 781G Z-step PCB?
Not necessarily. Current listings show separate 781G-related PCB products, including a 781G Z-step PCB and a PCB/control-box board associated with 19950020300. These should not be treated as interchangeable simply because both mention 781G. Match the part number, board markings and connector arrangement before ordering.
Can a different 781-series PCB be used as a substitute?
Do not substitute a different 781-series PCB without confirming compatibility. Spare-parts listings distinguish between boards for 781D, 781E and 781G machines, and even different boards are listed for 781G applications. The safest match is the same 19950020300 V1.08 configuration.
Will replacing the PCB fix every Jack 781G electronic problem?
No. A PCB replacement only addresses faults originating from the main control board. Problems caused by sensors, motors, wiring, connectors, power components, switches or other electronic assemblies require separate diagnosis. Have the complete electrical system checked if the machine continues to malfunction after board replacement.
