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Brother PR655 Service Manual

Brother PR655
341 pages
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Failure Investigation for Electronic Parts
Failure Investigation
for Electronic Parts
Failure Investigation
for Electronic Parts
5 - 10
The hoop does not move normally.
The hoop does not move normally.
Connect it properly.
N
Y
Connect it properly.
Is the FFC (SML2CD-YC) properly connected
to CN1 on the Y area sensor PCB and CN1
on the connect PCB? Is the orientation of
the FFC (SML2CD-YC) correct?
N
Y
Connect it properly.
Is the Y area sensor's lead properly
connected to CN23 on the main
PCB?
N
Is the FFC (SML2CD-CX) properly connected
to CN1 on the X area sensor PCB and CN3
on the connect PCB? Is the orientation of
the FFC (SML2CD-C) correct?
Y
Change the FFC (SML2CD-CX).
Is the resistance between each terminal
at both ends 1 or below when the FFC
(SML2CD-CX) is removed from the PCB?
N
Y
Change the FFC (SML2CD-YC).
Is the resistance between each terminal
at both ends 1 or below when the FFC
(SML2CD-YC) is removed from the PCB?
N
Y
Change the X area sensor PCB.
Does the machine function normally when the X
area sensor PCB is replaced with a reliable one?
Y
N
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Table of Contents

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Brother PR655 Specifications

General IconGeneral
Number of Needles6
Built-in Designs25
USB PortYes
LCD DisplayYes
TypeEmbroidery Machine
Built-in Fonts28
Maximum Speed1000 stitches per minute
Embroidery Area300mm x 200mm

Summary

2. Disassembly

Main Unit Disassembly

Covers disassembly procedures for the main components of the machine.

3. Assembly

Main Unit Assembly

Covers assembly of the primary structural and external parts.

4. Adjustment

Adjustment Procedures

Procedures for adjusting critical machine parameters.

Input Needle Bar Data for Adjustment

Process for inputting specific needle bar data for calibration.

Motor Belt Tension Adjustment

Procedure for adjusting the tension of the main motor drive belt.

Timing Belt Tension Adjustment

Procedure for adjusting the tension of the timing belt.

Needle Drop (Front/Back) Adjustment

Adjustment for the needle's front-to-back position relative to the plate.

Needle Position (Left/Right) Adjustment

Adjustment for the needle's left-to-right position relative to the plate.

Needle Bar Rising and Needle Clearance

Adjustment for needle bar height and clearance with the rotary hook.

Needle Bar Height Adjustment

Procedure for setting the correct vertical position of the needle bar.

Rotary Hook Stopper Clearance Adjustment

Adjustment for the clearance between the rotary hook stopper and the hook.

Presser Foot Height Adjustment

Procedure for setting the correct height of the presser foot.

Needle Bar Top Dead Center Adjustment

Adjustment for the needle bar's highest position relative to the top dead center plate.

Needle Threader (Up/Down) Adjustment

Adjustment for the vertical movement of the needle threader mechanism.

Needle Threader (Left/Right) Adjustment

Adjustment for the horizontal movement of the needle threader mechanism.

Y Belt Tension Adjustment

Adjustment for the tension of the Y-axis belt.

X Belt Tension Adjustment

Adjustment for the tension of the X-axis belt.

Picker Activation Adjustment

Adjustment for the proper activation of the picker mechanism.

Movable Knife Initial Position

Setting the initial position of the movable thread cutting knife.

Thread Presser Base Up/Down Position

Adjusting the vertical position of the thread presser base.

Hoop Sensor (A/D Value) Calibration

Calibrating the hoop sensor by adjusting its A/D values.

X, Y Carriage Initial Position Setting

Setting the home or initial position for the X and Y carriages.

Movable Knife and Fixed Knife Engagement Load

Adjusting the force required to engage the movable and fixed knives.

5. Failure Investigation for Electronic Parts

Troubleshooting: Power Not Turning On

Troubleshooting steps when the machine does not power on.

Troubleshooting: Touch Panel Not Working

Troubleshooting steps when the touch panel is unresponsive.

Troubleshooting: Panel Switch Not Working

Troubleshooting steps when panel switches are not functioning.

Troubleshooting: Needle Bar Not Moving Normally

Troubleshooting steps when the needle bar movement is abnormal.

Troubleshooting: Thread Breakage Detection Failure

Troubleshooting steps when the thread breakage sensor fails.

Troubleshooting: Hoop Not Moving Normally

Troubleshooting steps when the embroidery hoop movement is abnormal.

Troubleshooting: Main Shaft Not Rotating Normally

Troubleshooting steps when the main shaft rotation is abnormal.

Troubleshooting: Thread Not Cutting Normally

Troubleshooting steps when the thread cutting mechanism fails.

6. Maintenance & Replacement

Component Replacement

Procedures for replacing major machine components.

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