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Brother PE770 User Manual

Brother PE770
234 pages
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Table of Contents

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Brother PE770 Specifications

General IconGeneral
AC input voltage110 V
Power supply typeElectric
DisplayLCD
InterfaceUSB
Control typeSensor
Sewing speed650
Product colorViolet, White
Buttonhole type-
Number of fonts6
Wire cutter includedYes
Sewing machine functionsEmbroidery
Automatic needle threaderNo
Number of illumination LEDs2
Number of embroidery designs136
Weight and Dimensions IconWeight and Dimensions
Depth438.9 mm
Width540 mm
Height425.9 mm

Summary

1. Outline of Mechanism

Main Mechanisms Overview

Details the primary mechanical systems of the sewing machine.

Driveline Explanation

Explains the mechanical power transmission system of the sewing machine.

Electronic Components Locations

Illustrates the locations of key electronic components within the machine.

Control System Block Diagram

Presents a schematic of the machine's control system architecture.

Other Electronic Component Operations

Describes the function and operation of various electronic components.

2. Disassembly Procedures

Main Unit: Main Parts Disassembly

Details the removal and disassembly of the main components of the sewing machine.

Main Unit: Electrical Parts and Motors Disassembly

Covers the disassembly and removal of electrical components and motors.

Main Unit: Thread Tension Mechanism Disassembly

Explains the disassembly procedures for the thread tension mechanism.

Main Unit: Bobbin Winder Mechanism Disassembly

Details the disassembly steps for the bobbin winder mechanism.

Main Unit: Rotary Hook Drive / Feed and Bobbin / Cutter Mechanism Disassembly

Covers disassembly of rotary hook, feed, bobbin, and cutter mechanisms.

Main Unit: Needle Bar, Presser Mechanism / Upper Shaft Mechanism Disassembly

Explains disassembly of needle bar, presser, and upper shaft mechanisms.

Modules: Needle-Presser Module Disassembly

Details the disassembly procedures for the needle-presser module.

Modules: Feed Module Disassembly

Covers the disassembly procedures for the feed module.

Modules: Thread Cutter Module Disassembly

Explains the disassembly steps for the thread cutter module.

Embroidery: Embroidery Parts Disassembly

Details the disassembly of components related to the embroidery unit.

3 Assembly Procedures

Main Unit: Needle Bar, Presser Mechanism / Upper Shaft Mechanism Assembly

Details assembly procedures for needle bar, presser, and upper shaft mechanisms.

Main Unit: Rotary Hook Drive / Feed and Bobbin / Cutter Mechanism Assembly

Covers assembly of rotary hook, feed, bobbin, and cutter mechanisms.

Main Unit: Bobbin Winder Mechanism Assembly

Explains assembly steps for the bobbin winder mechanism.

Main Unit: Thread Tension Mechanism Assembly

Details assembly procedures for the thread tension mechanism.

Main Unit: Electrical Parts and Motors Assembly

Covers assembly of electrical components and motors.

Main Unit: Main Parts Assembly

Details the assembly of the main structural parts of the sewing machine.

Modules: Needle-Presser Module Assembly

Details the assembly procedures for the needle-presser module.

Modules: Feed Module Assembly

Covers the assembly procedures for the feed module.

Modules: Thread Cutter Module Assembly

Explains assembly steps for the thread cutter module.

Embroidery: Embroidery Parts Assembly

Details the assembly of components related to the embroidery unit.

4. Adjustment Procedures

Inspection and Test Modes

Covers initial inspection procedures and operation of test modes for adjustments.

Timing and Belt Tension Adjustments

Details adjustments for timing belts and motor belt tensions.

Thread Tension Adjustments

Explains how to adjust upper thread, lower thread, and fine thread tensions.

Needle and Presser Foot Adjustments

Covers adjustments for needle position, height, and presser foot settings.

Bobbin Winder and Embroidery Adjustments

Details adjustments for the bobbin winder quantity and embroidery unit positioning.

5 Failure Investigation for Electronic Parts

Error Message List and Power Issues

Lists error messages and guides troubleshooting for power-related failures.

Motor Operation Failures

Covers troubleshooting steps for main motor rotation and speed issues.

Sewing and Threading Failures

Guides troubleshooting for thread tension, thread cutter, and bobbin winding issues.

Embroidery Unit Failures

Details troubleshooting steps for embroidery unit operation and component failures.

Touch Panel and LCD Issues

Covers troubleshooting for touch panel and LCD backlight malfunctions.

6 Repair Manual

Stitch and Needle Mechanism Issues

Troubleshooting guide for stitch skipping, needle breakage, and seam unevenness.

Power, Display, and Switch Issues

Addresses problems with power, LCD display, and switch malfunctions.

Motor and Drive System Issues

Troubleshooting for irregular rotation, sewing sounds, and contact noises.

Threading and Tension System Issues

Guides for resolving threading problems and incorrect thread tension.

Thread Cutter and Bobbin Winder Issues

Troubleshooting for thread cutter and bobbin winder operational failures.

Embroidery Machine Operation Issues

Addresses failures related to the embroidery unit's operation.

7 Special Instructions of Wiring

Needle Bar Module Wiring Guide

Illustrates proper wiring procedures for the needle bar module.

Rotary Hook Module Wiring Guide

Provides guidance on wiring the rotary hook module.

Motor PCB Assembly Wiring Guide

Details the wiring connections for the motor PCB assembly.

Front Cover Assembly Wiring Guide

Illustrates wiring procedures for the front cover assembly.

Embroidery Unit Assembly Wiring Guide

Provides guidance on wiring the embroidery unit assembly.

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