Brother LZ2-B855E User Manual (English)

Other manuals for Brother LZ2-B855E

Questions and Answers:

T
tranandrewAug 2, 2025
Why does my Brother LZ2-B855E skip stitches?
- R
  Ruth BatesAug 2, 2025
  If skipped stitches occur while sewing with your Brother Sewing Machine, several factors could be at play. The needle tip might be bent or blunt; if so, replace the needle. Ensure the needle is correctly installed and the machine is properly threaded. Insufficient presser foot pressure can also cause this, so adjust it accordingly. If the needle is too thin, replace it with a slightly thicker one. Also, make sure that the presser foot is at the correct height. In some cases, the needle and rotary hook timing may be off, requiring adjustment of the needle bar height and clearance. Finally, check the thread tension spring and adjust its tension if necessary.
M
Melody WilsonAug 9, 2025
How to fix loose upper thread on my Brother LZ2-B855E?
- P
  Paul KingAug 9, 2025
  If the upper thread is not tight on your Brother Sewing Machine, it could be due to the upper thread tension being too weak or the lower thread tension being too strong. To resolve this, adjust either the upper thread tension or the lower thread tension accordingly.
M
Michele RobertsonAug 16, 2025
What to do if lower thread is not tight on Brother LZ2-B855E?
- T
  timothyriveraAug 16, 2025
  If the lower thread is not tight on your Brother Sewing Machine, it may be because the lower thread tension is too weak, or the upper thread tension is too strong. Try adjusting the lower thread tension or the upper thread tension to correct this.
N
Nicole ButlerAug 23, 2025
Why does my Brother Sewing Machine make flattened zigzags?
- R
  ryan82Aug 23, 2025
  If you notice flattened zigzags appearing in the stitch during intermittent sewing with your Brother Sewing Machine, it might be because the treadle was depressed backward when the sewing machine was stopped. Avoid pressing the treadle backward in this situation. Additionally, if the treadle moves too easily when depressed backward, adjust the force required to depress the treadle backward so that it is a bit heavier.

Brother LZ2-B855E Specifications

General

Brand	Brother
Model	LZ2-B855E
Category	Sewing Machine
Language	English

Summary

SAFETY INSTRUCTIONS

Safety indications and their meanings

Defines DANGER/CAUTION indications and warning symbols for safe operation.

Notes on safety

Environmental requirements

Specifies conditions for machine operation like electrical noise, voltage, humidity.

Installation guidelines

Guidelines for safe installation including qualified personnel and securing parts.

MACHINE SPECIFICATIONS

Machine Specifications Overview

Details model specifications, use, stitch length, speed, patterns, parts, motor, and power supply.

SEWING PATTERN TABLE

Sewing Pattern Selection Guide

Lists available sewing patterns, pattern numbers, and notes for selection and usage.

MECHANICAL DESCRIPTIONS

3-1. Needle bar and thread take-up mechanism

Explains the operation of the needle bar and thread take-up components.

3-2. Lower shaft and rotary hook mechanism

Describes the functionality of the lower shaft and rotary hook assembly.

3-3. Zigzag mechanism

Details the electronic zigzag mechanism, including the damper system.

3-4. Presser foot mechanism

Explains the operation of the presser foot and its lifting mechanisms.

3-5. Feed mechanism

Describes the feed dog's movement and adjustments via dials.

3-6. Lubrication system

Details the lubrication system for the machine, including oil distribution.

3-7. Thread trimmer mechanism (B856E)

Explains the operation of the thread trimming mechanism specific to the B856E model.

3-8. Tension release mechanism

Describes the mechanism responsible for releasing thread tension.

3-9. Thread wiper mechanism (B856E)

Explains the function and operation of the thread wiper for the B856E model.

DISASSEMBLY

4-1. Cover disassembly

Instructions for removing the machine's covers, including face and rear covers.

4-2. Presser mechanism disassembly

Steps for disassembling the presser foot and related components.

4-3. Needle bar mechanism disassembly

Procedures for taking apart the needle bar assembly.

4-4. Zigzag mechanism disassembly

Instructions for disassembling the zigzag sewing unit.

4-5. Rotary hook mechanism disassembly

Steps for removing and disassembling the rotary hook and needle plate.

4-6. Feed mechanism disassembly

Instructions for disassembling the feed dog and feed mechanism parts.

4-7. Thread trimmer mechanism disassembly (B856E)

Procedures for disassembling the thread trimmer for the B856E model.

4-8. Thread wiper mechanism disassembly (B856E)

Steps for disassembling the thread wiper mechanism.

4-9. Panel disassembly

Instructions for removing the machine's control panel and related wiring.

ASSEMBLY

5-1. Thread trimmer mechanism assembly (B856E)

Instructions for reassembling the thread trimmer mechanism for the B856E.

5-2. Feed mechanism assembly

Steps for correctly assembling the feed dog and feed mechanism.

5-3. Zigzag mechanism assembly

Instructions for reassembling the zigzag sewing unit and related parts.

5-4. Needle bar mechanism assembly

Procedures for reassembling the needle bar assembly.

5-5. Rotary hook mechanism assembly

Steps for reassembling the rotary hook, needle plate, and feed dog.

5-6. Presser mechanism assembly

Instructions for reassembling the presser foot and its lifting components.

5-7. Panel assembly

Instructions for reinstalling the control panel and connecting its harness.

5-8. Cover assembly

Procedures for reattaching the machine's covers.

5-9. Thread wiper mechanism assembly (B856E)

Instructions for reassembling the thread wiper mechanism.

ADJUSTMENTS

6-1. Adjusting the thread tension spring

How to adjust the thread tension spring position and tension.

6-2. Adjusting the presser foot height

Procedure for setting the correct height of the presser foot.

6-3. Adjusting the feed dog height

How to adjust the height of the feed dog for optimal feeding.

6-4. Adjusting the feed dog angle

Steps to adjust the feed dog's angle to prevent puckering or slippage.

6-5. Adjusting feed dog position

How to set the feed dog's forward/back and right/left position relative to the needle plate.

6-6. Adjusting the stitch length

Procedure for calibrating the stitch length adjustment dial.

6-7. Adjusting needle and feed mechanism timing

How to synchronize the needle and feed mechanisms for correct stitch formation.

6-8. Adjusting needle bar forward/back position

Procedure for setting the needle bar's front-to-back position.

6-9. Adjusting needle bar right/left position

How to align the needle bar's side-to-side position for zigzag sewing.

6-10. Adjusting the needle bar height

Procedure for setting the correct height of the needle bar.

6-11. Adjusting needle and rotary hook timing

How to synchronize the needle and rotary hook for proper stitch piercing.

6-12. Adjusting the hook stopper position

Procedure for setting the correct position of the hook stopper.

6-13. Adjusting the synchronizer

How to adjust the synchronizer for needle position detection.

6-14. Adjusting rotary hook lubrication

Procedure for checking and adjusting the oil supply to the rotary hook.

6-15. Adjusting needle bar lubrication

How to adjust lubrication for the needle bar area to prevent sluggishness.

6-16. Adjusting thread tension release (B856E)

Procedure for adjusting thread tension release timing for B856E.

6-17. Adjusting thread trailing length (B856E)

How to set the upper thread trailing length after trimming.

6-18. Adjusting thread trimming timing (B856E)

Procedure for adjusting the thread trimming mechanism's timing.

6-19. Adjusting lower thread presser spring tension (B856E)

How to adjust the lower thread presser spring tension.

6-20. Adjusting the thread wiper (B856E)

Procedure for adjusting the position of the thread wiper for B856E.

6-21. Adjusting reverse feed assembly (B855E/BT856E)

How to adjust the reverse feed mechanism for specific models.

TROUBLESHOOTING

ELECTRIC COMPONENTS

8-1. Precautions at time of adjustment

Safety precautions when working inside the control box, including electrical shock risks.

8-2. Components inside control box

Brief explanations of components within the control box for machine operation.

8-3. Fuse explanation

Information on fuses, their locations, and troubleshooting related to blown fuses.

8-4. Connectors

General information about connectors and their importance for machine troubleshooting.

8-4-1. Connector positions

Diagrams showing the location of various connectors on the machine.

8-4-2. Signal names and symptoms

Lists signal names for connectors and probable symptoms due to poor contact.

8-5. Summary of DIP switches

Explains the functions and settings of DIP switches for machine operation.

8-6. Memory switches

Details how to change machine functions using memory switches on the operation panel.

8-7. Parameters

Instructions on how to change machine parameters via the operation panel settings.

8-8. Speed parameter settings

How to adjust various speed parameters for machine operation.

8-9. Initialization procedures

Steps to reset machine data and settings to factory defaults.

8-10. List of error codes

Provides a list of error codes, their meanings, and probable causes.

8-11. Troubleshooting guide

General guidance for troubleshooting machine issues.

8-11-1. Troubleshooting flowchart

A step-by-step visual guide for diagnosing and resolving machine problems.

8-11-2. Problem solution and measures

Detailed table of problems, probable causes, and repair/replacement actions.

8-12. Control circuit block diagram

A schematic illustrating the machine's electrical control system connections.

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