Brother S-710A User Manual (English)

Questions and Answers:

J
Joseph CarterAug 22, 2025
Why does my Brother Sewing Machine have skipped stitches at the start?
- T
  Tracy KaneAug 23, 2025
  Skipped stitches at the start may occur if the thread tension spring tensions are too strong; reduce the tension. If the thread tension spring operating range is too large, lower its position. Adjust the pretension if the trailing lengths of the upper threads are too short after thread trimming. Sharpen the fixed knives or replace them if the threads aren't being trimmed cleanly. Try a needle with a count that is one lower if the needle is too wide. Replace the stopper spring in the bobbin case if the length of thread trailing out from the bobbin case is too short after thread trimming and the bobbin is spinning loosely. Use the slow start feature if the sewing speed is too fast at the sewing start. Adjust the synchronizer if the needle up stop position is too high.
A
adam15Sep 2, 2025
What to do if the oil gauge is not visible in the oil sight glass of my Brother Sewing Machine?
- L
  Lisa HernandezSep 2, 2025
  If the oil gauge is not visible in the oil sight glass, fill the oil tank with oil. Check the rotary hook lubrication amount, and adjust the rotary hook lubrication adjusting screw if it is too loose. Replace the oil gauge if it is damaged.
M
Matthew ScottSep 1, 2025
What to do if my Brother S-710A Sewing Machine stops during sewing?
- J
  Johnny MorrisSep 1, 2025
  If the machine stops during sewing, check the power supply voltage to ensure it is sufficient.
M
Marcus ThompsonAug 31, 2025
What to do if my Brother Sewing Machine motor doesn't operate smoothly or makes abnormal noises?
- T
  Tyler ChavezAug 31, 2025
  If the motor doesn't operate smoothly or makes an abnormal noise, it indicates a problem with the speed sensor. Replace the motor.
R
Rachel WintersAug 29, 2025
What to do if my Brother S-710A Sewing Machine does not operate when power is on?
- D
  Dr. Nancy JohnsonAug 30, 2025
  If the machine doesn't operate when powered on and the treadle is pressed, ensure the power supply connector is securely connected to the control box. Check the power plug wiring and voltage. Verify that DIP switch No. 8 inside the control box is set to OFF. Also, confirm that the treadle unit connector inside the control box is securely connected.
R
rlewisAug 28, 2025
How to troubleshoot a Brother Sewing Machine that does not operate at high speed?
- A
  Amber HinesAug 28, 2025
  If the machine does not operate at high speed, check if the sewing speed setting or backtack speed setting is incorrect. If so, set the speed to a higher speed using the operating panel. Also, ensure the FVR inside the control box is at the maximum setting by turning it clockwise.
N
ngomezAug 27, 2025
Why is the lower thread not tight on my Brother S-710A?
- M
  Mark FarmerAug 27, 2025
  If the lower thread is not tight, it might be because the lower thread tension is too weak, or the upper thread tension is too strong. Adjust the lower or upper thread tension accordingly.
J
Jeremy StevensAug 26, 2025
How to fix a Brother Sewing Machine when the upper thread is not tight?
- J
  Jason BishopAug 27, 2025
  If the upper thread is not tight, it could be because the upper thread tension is too weak, or the lower thread tension is too strong; adjust the upper or lower thread tension accordingly. Also, the needle and feed mechanism timing might be incorrect; advance the needle timing.
J
jeffreysuarezAug 25, 2025
How to fix a Brother Sewing Machine when the needle breaks?
- E
  Erin SweeneyAug 26, 2025
  If the needle breaks, it might be due to pushing or pulling the material too hard during sewing. Make sure the needle is correctly installed. Replace the needle if it's bent, broken, or the needle hole is blocked. Adjust the height of the needle bar if the needle and rotary hook timing is incorrect. Retard the needle timing if it's advanced too far with respect to the feed dog.
E
Eric JohnsonAug 25, 2025
What to do if skipped stitches occur while sewing with my Brother Sewing Machine?
- B
  bankstonyaAug 25, 2025
  If skipped stitches occur, check the following: * Replace the needle if it's bent or broken. * Ensure the needle is correctly installed and the machine is properly threaded. * Adjust the presser foot pressure if it's too weak. * Use a thicker needle if the current one is too thin. * Adjust the height of the presser foot if it's too high. * Adjust the height of the needle bar if the needle and rotary hook timing is incorrect. * Adjust the tension of the thread tension spring if it's too weak. * Replace the rotary hook if the tip is broken.

Brother S-710A Specifications

General

Brand	Brother
Model	S-710A
Category	Sewing Machine
Language	English

Summary

Safety Instructions

Safety Indications and Their Meanings

Explains the meaning of DANGER, CAUTION, and symbols used for safety.

Notes on Safety

Provides important safety notes regarding environmental requirements and installation.

Warning Labels on the Machine

Identifies and explains warning labels found on the sewing machine.

About the Ground Symbol

Explains the purpose and connection of the ground symbol.

Specifications

Machine Head Specifications

Details specifications for the sewing machine head, including models and features.

Operation Panel Specifications

Lists the available operation panels and their part codes.

Optional Parts

Optional Parts Listing

Catalogs optional parts with part names and codes for various machine configurations.

Notes on Handling

Machine Handling Precautions

Covers machine setup location, carrying, tilting, and returning the head.

Mechanical Descriptions

4-1. Upper Shaft and Needle Bar Mechanism

Explains the components and operation of the upper shaft and needle bar system.

4-2. Lower Shaft and Rotary Hook Mechanism

Describes the lower shaft, rotary hook, and related components.

4-3. Feed Mechanism

Details the vertical and horizontal movement of the feed bar.

4-4. Quick Reverse Mechanism

Explains the operation of the quick reverse stitching mechanism.

4-5. Lubrication Mechanism

Describes the lubrication system for the thread take-up lever and rotary hook.

4-6. Thread Trimmer Mechanism

Explains the operation of the thread trimmer mechanism.

4-6-2. Upper and Lower Thread Trimming

Details the process of trimming both upper and lower threads.

4-7. Tension Release Mechanism

Describes the mechanism for releasing thread tension.

4-8. Thread Wiper Mechanism

Explains the operation of the thread wiper.

4-9. Presser Foot Lifter Mechanism

Details the presser foot lifting mechanism, often including options.

4-10. Lower Thread Detector Mechanism

Explains how the lower thread detection system works.

Disassembly

5-1. Bed Cover and Safety Switch Disassembly

Instructions for disassembling the bed cover and safety switch.

5-2. Connector Disassembly

Details the disconnection and identification of various connectors.

5-3. Solenoid-Type Presser Lifter Disassembly

Steps for disassembling the solenoid-type presser lifter.

5-4. Lower Thread Detector Disassembly

Instructions for removing the lower thread detector.

5-5. Covers and Operation Panel Disassembly

Steps for disassembling covers and the operation panel.

5-6. Wire and Solenoid Disassembly

Procedures for removing tension release wire, ground wire, and trimmer solenoid.

5-7. Lubrication System Component Disassembly (Wick Holder and Oil Tube)

Instructions for disassembling wick holder and oil tube.

5-8. Oil Tank, Bed Under Cover, and Sub Tank Disassembly

Steps for removing the oil tank, bed under cover, and sub tank.

5-9. Quick Reverse Solenoid Disassembly

Details how to remove the quick reverse solenoid.

5-10. Needle, Presser Foot, and Reverse Actuator Assy Disassembly

Instructions for disassembling the needle, presser foot, and reverse actuator.

5-11. Thread Tension Mechanism Disassembly

Steps for disassembling the thread tension mechanism.

5-12. Needle Plate and Feed Dog Disassembly

Instructions for removing the needle plate and feed dog.

5-13. Bobbin Case, Rotary Hook, and Thread Trimming Mechanism Disassembly

Steps for disassembling these complex parts.

5-14. Feed Bar Mechanism Disassembly

Instructions for disassembling the feed bar mechanism.

5-15. Feed Rocker Shaft Disassembly

Details on removing the feed rocker shaft.

5-16. Presser Foot Mechanism Disassembly

Steps for disassembling the presser foot mechanism.

5-17. Knee Lifter Lever Mechanism Disassembly

Instructions for disassembling the knee lifter lever mechanism.

5-18. Needle Bar and Thread Take-up Mechanism Disassembly

Steps for disassembling the needle bar and thread take-up mechanism.

5-19. Pulley and Motor Disassembly

Instructions for removing the pulley and motor.

5-20. Timing Belt Disassembly

Details on removing the timing belt.

5-21. Spring and Feed Regulator Disassembly

Steps for disassembling the spring and feed regulator.

5-22. Lower Shaft, Lower Shaft Gear, and Feed Regulator Set Disassembly

Instructions for disassembling these shaft and gear components.

5-23. Plunger, Rotary Hook Shaft, Gear, and Thread Trimmer Cam Disassembly

Steps for removing plunger, rotary hook shaft, gear, and trimmer cam.

5-24. Stitch Length Dial Disassembly

Instructions for disassembling the stitch length dial.

5-25. Reverse Stitching Lever and Feed Regulator Disassembly

Details for removing the reverse stitching lever and feed regulator.

Assembly

6-1. Stitch Length Dial, Reverse Stitching Lever, and Feed Regulator Mechanism Assembly

Instructions for assembling stitch length dial, reverse lever, and feed regulator.

6-2. Rotary Hook Shaft, Thread Trimmer Cam, and Gear Assembly

Steps for assembling rotary hook shaft, trimmer cam, and gear.

6-3. Plunger Assembly

Instructions for assembling the plunger.

6-4. Lower Shaft, Lower Shaft Gear, and Feed Regulator Set Assembly

Details for assembling these shaft and gear components.

6-5. Timing Belt, Motor, and Pulley Assembly

Steps for assembling the timing belt, motor, and pulley.

6-6. Knee Lifter Lever Mechanism Assembly

Instructions for assembling the knee lifter lever mechanism.

6-7. Needle Bar and Thread Take-up Mechanism Assembly

Steps for assembling the needle bar and thread take-up mechanism.

6-8. Presser Foot Mechanism Assembly

Instructions for assembling the presser foot mechanism.

6-9. Feed Rocker Shaft Assembly

Details for assembling the feed rocker shaft.

6-10. Spring Assembly

Instructions for assembling the spring.

6-11. Feed Bar Mechanism Assembly

Steps for assembling the feed bar mechanism.

6-12. Sub Tank, Wick Holder, and Wick Assembly

Instructions for assembling lubrication system components.

6-13. Thread Tension Mechanism Assembly

Steps for assembling the thread tension mechanism.

6-14. Oil (Feed Rocker Shaft) Procedure

Instructions for oiling the feed rocker shaft.

6-15. Thread Trimming Mechanism Assembly

Steps for assembling the thread trimming mechanism.

6-15-2. Adjusting the Needle and Feed Mechanism Timing

Steps for adjusting the timing between the needle and feed mechanism.

6-15-3. Installing the Movable Knife and Fixed Knife

Instructions for installing the thread trimming knives.

6-15-4. Adjusting the Thread Trimming Timing

Details for adjusting the thread trimmer timing.

6-16. Rotary Hook and Bobbin Case Holder Position Bracket Assembly

Steps for assembling and adjusting the rotary hook and bobbin case holder.

6-17. Ruler Plate and Needle Plate Assembly

Instructions for assembling the ruler plate and needle plate.

6-18. Reverse Actuator Assembly and Presser Foot

Steps for assembling the reverse actuator and presser foot.

6-18-1. Adjusting the Presser Foot Height

Details for adjusting the presser foot height.

6-18-2. Adjusting the Thread Guide Height

Instructions for adjusting the thread guide height.

6-18-3. Adjusting the Tension Spring Vertical Position

Steps for adjusting the vertical position of the tension spring.

6-18-4. Adjusting the Thread Tension Bracket Forward/Back Position

Details for adjusting the forward/back position of the thread tension bracket.

6-19. Tension Release Wire Assembly

Instructions for assembling the tension release wire.

6-20. Quick Reverse Solenoid Assembly

Steps for assembling the quick reverse solenoid.

6-21. Bed Under Cover (Gear Box) Assembly

Instructions for installing the bed under cover and lubricating the gear box.

6-22. Oil Tank Assembly

Steps for assembling the oil tank and related tubes.

6-23. Tension Release Wire Assembly

Instructions for assembling the tension release wire.

6-24. Ground Wire Installation

Steps for connecting the ground wire.

6-25. Operation Panel Installation

Instructions for installing the operation panel.

6-26. Face Plate and Thread Take-up Cover Installation

Steps for installing the face plate and thread take-up cover.

6-27. Safety Switch Installation

Instructions for installing the safety switch.

6-28. Arm Cover, Rear Cover, and Bobbin Winder Tension Assembly

Steps for assembling covers and the bobbin winder tension.

6-30. Connectors Installation

Instructions for connecting various wires and connectors.

6-31. Lubrication Procedure

Details the procedure for lubricating machine components.

6-32. Bed Cover and Knee Lifter Lever Installation

Steps for installing the bed cover and knee lifter lever.

6-33. Test Operation Procedure

Guides for performing a test operation of the machine.

6-34. Adjusting the Safety Switch Position

Instructions for adjusting the safety switch position for proper operation.

Adjustments

7-1. Adjusting the Thread Tension Spring

Covers adjusting thread tension spring position and tension.

7-2. Adjusting Arm Thread Guide R

Instructions for adjusting the position of the arm thread guide.

7-3. Adjusting the Presser Foot Height

Steps for adjusting the presser foot height.

7-4. Adjusting of the Feed Dog Height

Details on adjusting the feed dog height.

7-5. Adjusting the Feed Dog Angle

Instructions for adjusting the feed dog angle.

7-6. Adjusting the Needle Bar Height

Steps for adjusting the needle bar height.

7-7. Adjusting the Needle and Feed Mechanism Timing

Details on adjusting the timing between needle and feed.

7-8. Adjusting the Needle and Rotary Hook Timing

Instructions for adjusting the timing between needle and rotary hook.

7-9. Quick Reverse Mechanism Adjustment

Details on adjusting the quick reverse mechanism.

7-10. Matching Stitch Lengths for Normal Feed and Reverse Feed

Procedure to match stitch lengths for normal and reverse feed.

7-11. Synchronizer Adjustment

Instructions for adjusting the synchronizer and needle stop position.

7-12. Adjusting the Tension Release Wire

Details on adjusting the tension release wire for proper thread trimming.

7-13. Adjusting the Treadle

Details adjusting treadle pressure, return pressure, and stroke.

7-14. Adjusting the Rotary Hook Lubrication Amount

Instructions for adjusting rotary hook lubrication amount.

Control System

8. Control System Operation

Explains how the control system operates based on treadle input.

Removing and Installing the Control Box

9. Control Box Removal and Installation

Step-by-step guide for removing and installing the control box.

Control Box and Motor Rating Plate

10. Control Box Identification

Details on control box specifications, serial numbers, and compliance.

10. Motor Identification

Details on motor types, serial numbers, and part codes.

Control Circuit Board

11. Control Circuit Board Overview

Identifies parts and their functions on the control circuit board.

11. Circuit Board Components Function

Explains the function of connectors, fuses, terminal board, DIP switch, etc.

Function Setting Methods

12-1. DIP Switch Functions

Explains the functions of DIP switches for machine operation settings.

12-2. Parameter Setting Procedures

Provides flowcharts and details for setting machine parameters.

12-3. Parameters

Lists and describes various machine parameters and their ranges.

12-5. Memory Switch Settings

Lists and explains the functions of various memory switches.

Treadle Unit Assembly

13-1. Treadle Unit Types

Describes the two types of treadle units and their differences.

13-2. Standard Setting Values

Lists standard setting values for treadle units G and H.

13-3. Setting Method for Standard Depression Strokes

Step-by-step guide for setting treadle depression strokes.

Standing Operation Pedal

14-1. Installing the Foot Plug

Instructions for installing the foot plug set if not originally equipped.

14-2. Connectors

Details the connectors for the standing operation pedal.

Puller (commercially available)

15-1. Puller Timing

Explains the timing of puller operation relative to sewing.

15-2. Puller Connector

Provides information on the puller connector assembly and part codes.

15-3. Binding the Cord

Instructions for securing the puller cord.

Auto Bobbin Changer

16-1. Auto Bobbin Changer Timing

Explains the timing signals for the auto bobbin changer.

16-2. Auto Bobbin Changer Connector

Provides information on the bobbin changer connector and part codes.

16-3. Binding the Cord

Instructions for securing the bobbin changer cord.

Speed Setting Methods

17-1. Types of Speed Settings

Lists and defines various speed settings available for the machine.

17-2. Setting Method

Step-by-step guide for setting machine speeds using the operation panel.

17-3. Checking the Speed Settings

Procedures for verifying the set machine speeds.

Clearing the Memory Data

18. Memory Data Clearing Procedures

Explains methods for clearing memory data and confirming the process.

Checking the Motor and Power Supply

19. Motor Resistance Check

Instructions for checking motor resistance for normal operation.

19. Power Supply Voltage Check

Guide for measuring power supply voltage against specifications.

Checking the Solenoids

20. Machine Head Solenoid Checks

Resistance checks for solenoids in the machine head.

20. Solenoid-Type Presser Lifter Connector Checks

Resistance checks for the presser lifter solenoid.

20. Lower Thread Detector Checks

Resistance check for the lower thread detector solenoid.

Wiring Diagrams

21-1. Control Circuit Board Wiring Diagrams

Diagrams showing control circuit board layout, components, and schematics.

21-2. Power Supply Circuit Board Wiring Diagrams (DD7100A, 710A)

Diagrams for power supply circuit boards for different models and voltages.

21-3. Power Supply Circuit Board Wiring Diagrams (DD7100)

Diagrams for power supply circuit boards for DD7100 models.

21-4. Transformer Wiring Diagrams

Diagrams showing transformer connections and types.

21-5. Operation Panel B-40 Wiring Diagrams

Diagrams for B-40 operation panel and its circuitry.

21-6. Operation Panel B-100 Wiring Diagrams

Diagrams for B-100 operation panel and its circuitry.

Troubleshooting

22-1. Sewing Problems Troubleshooting

Lists common sewing problems, their causes, and solutions.

22-2. Error Code Displays Troubleshooting

Explains error codes displayed on the operation panel and their troubleshooting steps.

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