Brother FS-40WT User Manual

Overview of the primary mechanical components of the sewing machine.

Explains the power transmission system and component movements.

Illustrates the location of various electronic parts within the machine.

Visual representation of the sewing machine's control system architecture.

Details the function and operation of secondary electronic parts.

Procedures for disassembling main external and structural components.

Procedures for disassembling electrical components and motors.

Procedures for disassembling needle bar, presser, and upper shaft mechanisms.

Procedures for disassembling the fabric feeding mechanism.

Procedures for disassembling the bobbin winding mechanism.

Detailed procedures for disassembling main parts of the sewing machine.

Procedures for disassembling electrical parts and motors.

Procedures for disassembling needle bar, presser, and upper shaft mechanisms.

Detailed procedures for assembling main parts of the sewing machine.

Procedures for assembling electrical parts and motors.

Procedures for entering test mode and operating the sewing machine for adjustments.

How to adjust the timing belt tension for optimal machine performance.

Procedures for adjusting the motor belt tension.

Adjusting the upper thread tension for proper stitch formation.

Adjusting the vertical position of the needle bar.

Adjusting the height of the feed dog for fabric feeding.

Adjusting the tension of the lower thread in the rotary hook.

List of error messages and their probable causes.

Step-by-step troubleshooting guides for specific error messages.

Guide to diagnose and fix issues where the machine does not power on.

Troubleshooting steps when the main motor fails to rotate.

Diagnosing and resolving issues with incorrect pattern stitching.

Instructions for wiring the needle bar and presser modules.

Procedures for correctly wiring the power supply unit.

Instructions for wiring components located in the front cover.