Table of Contents
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Table of Contents
Related Manuals for Brother BAS-375
Summarization of Contents
Mechanical Descriptions
Needle Bar and Thread Take-Up, Lower Shaft, and Rotary Hook Mechanisms
Details the needle bar, thread take-up, lower shaft, and rotary hook mechanisms.
Presser Plate Mechanism
Explains the operation of the presser plate mechanism using air pressure.
Drive, Feed Mechanism
Describes the X and Y direction drive and feed mechanisms.
Intermittent Presser Foot Mechanism
Details the intermittent presser foot mechanism operation and raising.
Thread Trimmer Mechanism
Explains the operation of the thread trimmer mechanism.
Auto Eject Mechanism
Describes the function and components of the auto eject mechanism.
Bottom Mechanism
Explains the operation of the bottom mechanism and its plunger.
Disassembly
Covers
Details the removal of machine covers and related components.
Presser Plate Mechanism
Explains how to disassemble the presser plate mechanism.
Needle Plate Mechanism
Details the disassembly steps for the needle plate mechanism.
Rotary Hook Mechanism
Describes the disassembly procedure for the rotary hook mechanism.
Bottom Mechanism
Outlines the steps for disassembling the bottom mechanism.
Thread Trimmer Mechanism
Explains the disassembly of the thread trimmer mechanism.
Intermittent Presser Foot Mechanism
Details the steps for disassembling the intermittent presser foot mechanism.
Needle Bar and Thread Take-Up Mechanism
Describes the disassembly of the needle bar and thread take-up mechanism.
Assembly
Needle Bar and Thread Take-Up Mechanism
Details the assembly of the needle bar and thread take-up mechanism.
Intermittent Presser Foot Mechanism
Explains the assembly of the intermittent presser foot mechanism.
Thread Trimmer Mechanism
Details the assembly steps for the thread trimmer mechanism.
Bottom Mechanism
Outlines the assembly procedure for the bottom mechanism.
Rotary Hook Mechanism
Describes the assembly and adjustment of the rotary hook mechanism.
Needle Plate Mechanism
Details the assembly steps for the needle plate mechanism.
Covers
Explains how to attach covers and related parts.
Standard Adjustments
Adjusting the Needle Bar Stroke
Guides on adjusting the needle bar stroke for proper operation.
Adjusting the Needle Bar Height
Provides instructions for adjusting the needle bar height.
Adjusting the Clearance Between the Needle and the Rotary Hook
Details how to set the clearance between the needle and rotary hook.
Adjusting the Presser Foot Height
Explains how to adjust the height of the presser foot.
Adjusting the Presser Foot
Guides on adjusting the presser foot's position.
Adjusting the Intermittent Presser Foot Lift Stroke
Details adjustment for the intermittent presser foot lift stroke.
Adjusting the Presser Plate Height
Provides instructions for adjusting the presser plate height.
Adjusting the Presser Plate Moving Speed
Guides on adjusting the presser plate's rising and descending speed.
Adjusting the Presser Plate Pressure
Explains how to adjust the presser plate pressure.
Adjusting the Bottom Plunger
Details adjustment of the bottom plunger's stroke and position.
Adjusting the Auto Eject Mechanism
Guides on adjusting the auto eject mechanism's force and positioning.
Adjusting the Thread Trimmer
Explains how to adjust the thread trimmer's cutting edge pressure.
Adjusting the Backlash
Details how to adjust backlash in Y and X directions.
Adjusting the Belt Tension
Guides on adjusting belt tension in Y and X directions.
Adjusting the Timing Between the Needle and Feed Mechanism
Explains how to adjust the timing of the needle and feed mechanisms.
Adjusting the Home Position
Provides instructions for adjusting the home position sensors.
Adjusting the Over Travel
Guides on adjusting the over travel sensors in X and Y directions.
Electrical Equipment
Fuse
Details fuse positions, capacities, and replacement procedures.
Power Supply Equipment
Explains the power supply equipment (AVR) and its replacement.
Circuit Board
Shows the position of the control circuit board and servo motor drivers.
Replacing the Circuit Board
Guides on replacing control, servo driver, and operation panel circuit boards.
LEDs of Servo Motor Driver
Explains the meaning of LEDs on the servo motor driver.
Function and Position of Sensors
Lists and illustrates the function and position of various sensors.
Connectors Explanations
Explains connector functions and problems caused by defects.
Setting the DIP Switch
Details the functions of DIP switches A, B, and C.
Setting the Memory Switch
Explains the settings and functions of memory switches 0, 1, 2, and 3.
Using the Optional Output
Guides on connecting and programming optional outputs.
Diagnosis Flowchart
Provides a flowchart for diagnosing machine issues.
Countermeasures
#1 The Power Lamp Does Not Light When Power Is Turned On.
Details causes and solutions when the power lamp is off.
#2 When R/W Switch is Pressed, Indicator Lamp on the Floppy Disk Drive (FDD) Does Not Light, and FDD Does Not Read Floppy Disk Data.
Addresses issues with the FDD indicator lamp and data reading.
#3 Error Number Appears a Few Second After R/W Switch is Pressed.
Explains error codes appearing after R/W switch press.
#4 Presser Plate Will Not Rise Even If Presser Lifter Pedal is Pressed.
Guides on troubleshooting when the presser plate fails to rise.
#5 Presser Plate Is Not Lowered When Presser Lifter Pedal is Depressed.
Details solutions when the presser plate does not lower.
#6 Error Number Appears When Presser Plate is at Its Home Position After Starting Pedal is Depressed.
Addresses error codes related to presser plate home position.
#7 Presser Plate Does Not Return to Home Position When Starting Pedal is Depressed.
Guides on issues with the presser plate not returning to home position.
#8 Presser Plate Does Not Move to Sewing Start Position.
Solutions for the presser plate not moving to the sewing start position.
#9 TEST Lamp Will Not Light When TEST Switch is Pressed.
Troubleshoots why the TEST lamp does not light.
#10 No Feeding Operation Occurs During Test Sewing.
Addresses issues with no feeding operation during test sewing.
#11 Rapid Feed Can Not Be Used During Test Sewing.
Guides on problems using rapid feed during test sewing.
#12 Machine Does Not Operate As Programmed During Test Sewing.
Solutions for machine not operating as programmed in tests.
#13 Machine Does Not Operate for Sewing.
Details troubleshooting for machine inoperability during sewing.
#14 Machine Operates But Presser Plate Does Not.
Addresses issues where the machine operates but the presser plate does not.
#15 Error No. 2 Appears During Sewing, and Machine is Stopped Suddenly.
Guides on handling Error No. 2 and sudden stops.
#16 Machine Will Not Trim Thread.
Solutions for the machine failing to trim thread.
#17 Machine Does Not Stop With Needle at Its Upper Position After Thread is Trimmed.
Addresses issues with the needle not stopping at the upper position post-trimming.
#18 Pattern Can Not Be Sewn As Programmed.
Solutions for programming or pattern execution errors.
#19 Machine Will Not Stop Even If Emergency Stop Switch is Pressed.
Guides on troubleshooting the emergency stop switch functionality.
#20 Thread Trimmer Does Not Operate Even If Emergency Stop State is Cancelled.
Addresses thread trimmer failure after emergency stop cancellation.
#21 Step Back Switch is Not Inoperative.
Solutions for an inoperative step back switch.
#22 Sewing Can Not Be Resumed.
Guides on resuming sewing operations.
#23 Programming Can Not Be Performed.
Details troubleshooting for programming failures.
Option
Sub Clamp
Explains the attachment and adjustment of the sub clamp.
Beam Sensor Thread Breakage Detector
Details the function, assembly, and adjustment of the beam sensor thread breakage detector.
Needle Thread Presser Assembly
Explains the attachment and adjustment of the needle thread presser assembly.
Two-Stage Thread Tension
Guides on attaching and adjusting the two-stage thread tension.
Intermittent Presser Foot Control Mechanism
Details the attachment and adjustment of the intermittent presser foot control mechanism.
Jig Pattern Sensor
Explains the attachment and adjustment of the jig pattern sensor.
Troubleshooting Guide
Machine Head Mechanism
Troubleshooting guide for problems related to the machine head mechanism.
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