Brother MD-602 User Manual (English)

Other manuals for Brother MD-602

Questions and Answers:

J
John KingAug 3, 2025
What to do if my Brother MD-602 Engine motor won't operate?
- K
  Keith MartinezAug 3, 2025
  If the Brother Engine motor won't operate, even with power on and the treadle depressed, there are several potential causes. First, check if the power indicator (green LED) is illuminated. If not, verify the main power voltage by trying a different outlet. Also, check for a blown 8A fuse. If the LED is illuminated, ensure the treadle is returned to the neutral position after powering on before starting. Finally, manually turn the machine pulley; if it's heavy or doesn't rotate, inspect the machine or motor.
T
Thomas GoodmanAug 11, 2025
Why does my Brother MD-602 Engine machine stop while sewing?
- M
  Mary PerezAug 11, 2025
  If your Brother Engine machine stops while sewing, it could be due to a voltage drop. Check the power voltage, keeping in mind that long or branched wiring can cause voltage drops during sewing, activating the reset function.
L
Linda AndersonAug 18, 2025
How to fix Brother Engine machine not operating at high speeds?
- M
  Matthew BeckerAug 18, 2025
  If your Brother Engine machine isn't operating at high speeds, start by checking if the speed adjustment knob has been turned counterclockwise. Also, remove the belt from the machine pulley and check the torque. Ensure the motor pulley size matches the machine.
N
Nicole FlowersAug 26, 2025
What to do if Brother MD-602 Engine machine doesn't stop with needle up/down?
- J
  James NelsonAug 26, 2025
  If your Brother Engine machine doesn't stop in the needle down or needle up position after returning the treadle to neutral, the synchronizer may be faulty, so replace it. Alternatively, the control box may be defective, and require replacement.

Brother MD-602 Specifications

General

Brand	Brother
Model	MD-602
Category	Engine
Language	English

Summary

Safety Instructions

Safety Indications and Their Meanings

Explains safety indications like WARNING and CAUTION, and symbols used.

Cautions with Regard to Safety

General Safety Cautions

Lists general cautions to be observed for safe operation and to prevent injury.

Warning Label

Warning Label Details

Details the warning label affixed to the control box, explaining its instructions.

Outline

Features and Compatibility

Describes motor features, output, torque, and compatible sewing machines.

Options and Connectivity

Lists optional accessories, input/output functions, and miscellaneous notes.

Operation Panel and Options

Attachable Operation Panels

Details F-20, F-40, F-100 panels, their diagrams, and associated sewing machine models.

Attachable Options

Lists standing work pedals and material edge sensors as attachable options.

Model Configuration

Model Configuration Codes

Explains how to configure motor model numbers based on panel, phase, and compatible head.

Explanation of the Name Plate

Name Plate Details

Explains the components and codes found on the control box and motor name plates.

Installation

Installing the Motor to the Work Table

Provides step-by-step instructions for mounting the motor onto the sewing machine work table.

Attaching the Belt

Guides on belt attachment and tension adjustment between motor and machine pulleys.

Installing the Belt Cover

Explains how to secure the belt cover to the motor, ensuring it doesn't touch the belt.

Connecting the Connecting Rod

Details how to connect the treadle lever to the connecting rod and adjust its position.

Adjusting Belt Cover Safety Mechanisms

Covers adjusting the belt casting prevention guide and finger guard for safety.

Connecting the Cords

Details the procedure for connecting power cords, ground cords, and sewing machine/control box connectors.

Installing the Head Lamp

Instructs on installing the head lamp, including caution about lamp wattage.

Connecting the External Operation Panel

Guides on connecting F-20, F-40, or F-100 operation panels to the control box.

Adjusting the Treadle Unit

Operating the Treadle

Explains treadle operation for one/two stage forward/rear stages, including neutral, low, high speed, and thread trim.

Adjusting the Treadle

Covers adjusting treadle pressure, return pressure, and stroke for optimal machine response.

Adjusting for Automatic Presser Foot Lifter

Details adjustments when using an automatic presser foot lifter device with the treadle.

Using the Control Box

Before Turning on the Power Switch

Checks connectors, belt tension, and manual operation before powering on the control box.

Power Switch and Power Indicator

Explains the function of the power ON/OFF switches and the green power indicator LED.

Setting the Sewing Speed

Describes how to adjust the sewing speed using the speed adjustment knob on the control box.

Control Box DIP Switch Setting Procedure

Details the steps for setting DIP switches inside the control box, including warnings and cautions.

Description of Functions

Lists functions available with control panel (No panel, F-20, F-40, F-100) and their usability.

Backtacking Function Using Control Box

Explains start and end backtacking functions using the control box when no operation panel is installed.

Setting the Number of Backtack Stitches

Details how to set the number of start and end backtack stitches using DIP switches SW3 and SW2.

Other DIP Switch Functions

Explains functions of DIP switches SW1 (1-8) and SW6 (1-4) for various settings.

Periodic Checks

Describes periodic maintenance like cleaning the dust cover and handling long-term storage.

Connecting Options

Connecting the Pedal for Standing Operations

Guides on connecting variable-speed or two-speed pedals for standing operations.

Connecting the Material Edge Sensor

Details connecting the Sensor II for built-in or external operation panel types.

Using the Operation Panel F-40

Changing the Head Settings

Setting Motor Pulley Size and DIP Switches

Explains setting pulley size and DIP switches (SW1, SW6) based on the sewing machine head type.

Setting DIP Switch for Maximum Speed

Details setting DIP switches (SW1-6, 7, 8) for maximum speed according to single and twin needle machines.

Setting Control Box Head Setting

Guides on setting the control box head setting mode for matching the machine head model.

Setting Control Box Speed Setting

Explains how to set control box speed settings for different heads, including single and twin needle types.

Changing the Function Settings

Memory Switch Setting Example

Shows examples of changing memory switch settings for thick material sewing and backtacking matching.

Parameter Setting Example

Demonstrates changing parameter settings to reduce motor startup delay and fluorescent light flicker.

Adjustments

Synchronizer Model DB2-B737-B748-B774-B791

Describes needle up/down position adjustments and synchronizer checks.

Troubleshooting Guide

Error Display and Details

Lists error codes displayed on the operation panel and their corresponding details and checks.

Control Box Troubleshooting Guide

Provides troubleshooting steps for power PCB, treadle unit, and synchronizer issues.

Checking Machine Solenoids

Details how to check machine solenoids by measuring resistance with a tester.

Checking the Motor

Explains how to check the motor by measuring resistance of its cord connections.

VR1 & VR2 Setting of Treadle Unit

Treadle Unit Adjustment Points

Covers adjusting VR1 for neutral position (P2) and VR2 for full forward operation (P6).

Explanation of Each Mode

Initialization Mode

Explains how to initialize memory data on the control PCB if it's changed by mistake.

Head Setting Mode

Guides on selecting the correct head number for the motor to match its specifications.

Memory Switch and Parameter Setting Modes

Covers changing functions via memory switches and time/timing via parameter settings.

Stitching Speed Setting Mode

Setting Stitching Speeds

Details how to change various stitching speeds like inching, thread trimming, slow start, and backtack speeds.

Operational Instructions

Power Switch ON

Describes motor power creation, solenoid power, control power, and checks upon power ON.

Power Switch OFF

Notes that there are no special processes when the power is OFF and capacitor discharge time.

Pedal Operation

Explains treadle unit output voltage and its relation to motor start, including neutral position voltage.

While Running

Details motor control, speed detection, and error codes like power transistor error and pulley error.

Memory Switch List

Memory Switch Functions

Lists memory switches (Display No.), their SW settings (ON/OFF), and the corresponding item/content.

Parameter List

Parameter Settings

Lists parameters (Display No.), initial data, setting range, and details for controlling motor operation.

Panel Display Table

Panel Display Characters

Shows alphabetic characters and symbols displayed on the operation panel's 7-segment displays.

How to Remove the Control Box

Block Diagram of Control Box

Control PCB Circuit (1/3)

Control PCB Circuit (2/3)

Control PCB Circuit (3/3)

Power PCB Assy, MD602 D1-110V

Power PCB Assy, MD602 D1-110V CE

Power PCB Assy, MD602 D1-230V

Treadle PCB Assy (B47A127)

Operation Panel Circuit Diagram

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