Jack F4 User Manual

Details on installing the oil pan, holder, and cushion on the stand.

Filling the oil pan, checking oil level, and ensuring lubrication is adequate.

How oil is supplied to the face plate parts via the main shaft plug.

Instructions on how to thread the sewing machine head.

Adjusting needle thread tension using the tension nut.

Adjusting bobbin thread tension using the tension adjust screw.

Adjusting the stroke and tension of the thread take-up spring.

Ensuring correct alignment between the needle and hook for proper stitching.

Adjusting pedal pressure and stroke for optimal operation.

Adjusting the knee lifter height for the presser foot.

Crucial steps to take before operating the machine.

General precautions to follow during machine operation.

Technical specifications of the sewing machine.

Read manual carefully before operating; operation by trained staff only.

Ensuring the governor rod is perpendicular to the pedal for proper function.

Adjusting sewing speed via the '+' or '-' buttons on the control panel.

Setting the needle's stop position (up or down) using the control panel.

Resetting control box parameters to factory defaults to resolve errors.

Using buttons to identify and potentially resolve error codes displayed.

Environmental and operational requirements for the control box.

Troubleshooting no reaction from the power control box, checking fuses.

Diagnosing why the motor doesn't work when the pedal is pressed.

Troubleshooting the motor not stopping correctly without operation.

Addressing the problem of the fuse burning immediately after turning on.

List of error codes, their reasons, and recommended solutions.