Brother SQ900 Manuals

Manuals and User Guides for Brother SQ900. We have 1 Brother SQ900 manual available for free PDF download: Service Manual

Brother SQ900 Service Manual

Brother SQ900 Service Manual (164 pages)

Computerized sewing machine with low-end computer 3 Series

Brand: Brother | Category: Sewing Machine | Size: 9.88 MB

Table of Contents

Table of Contents

4
- Main Mechanisms
  4
- Positions of Electronic Components
  4
- Outline of Mechanism
  10
  - Needle Plate B Assy. Removal
    19
    
    Needle Plate B Assy. Disassembly
    19
  - Front Cover Assy. Removal
    21
  - Thread Guide Assy. a Removal
    22
    
    Thread Guide Assy. a Disassembly
    22
  - Thread Guide Assy. B Removal
    23
  - Ssvr Pcb Assy. Removal
    24
  - Buttons Removal
    24
  - Led Lamp Removal
    24
  - Selecting and Manual Buttons Removal
    25
  - Single Light Guide Assy. Removal
    25
  - Mode Select Pcb Assy. Removal
    25
  - Panel Cover Assy. Removal
    27
    
    Panel Cover Assy. Disassembly
    27
  - Base Plate Rubber Removal
    28
  - Upper Cover Thread Guide Removal
    28
  - Main Pcb Assy. Removal
    28
  - Power Pcb Assy. Removal
    29
    
    Power Pcb Assy. Disassembly
    29
  - Inlet Assy. Removal
    29
  - Fc Jack Removal
    30
  - Main Motor Assy. Removal
    30
    
    Main Motor Assy. Disassembly
    30
  - Tension Pulley Assy. Removal
    31
    
    Tension Pulley Assy. Disassembly
    31
  - Feed Unit Assy. Removal
    32
  - Upper Shaft Assy. Removal
    32
  - Needle-Presser Unit Removal
    33
  - Plate Spring Removal
    33
  - Bobbin Base Assy. Removal
    34
    
    Bobbin Base Assy. Disassembly
    34
  - Bobbin Winder Assy. Removal
    34
  - Spool Pin Removal
    35
  - Bobbin Presser Removal
    35
  - Thread Guide Assy. Removal
    35
  - Needle Plate a Assy. Removal
    38
    
    Needle Plate a Assy. Disassembly
    38
  - Spring Removal
    38
  - Inner Rotary Hook Bracket Assy. Removal
    38
  - Feed Dog Removal
    39
  - Vertical Adjuster Screw Assy. Removal
    39
  - Outer Rotary Hook Removal
    39
  - Shaft Supporter Removal
    39
  - Feed Bar Removal
    40
  - Needle Plate Supporter Shaft B Removal
    40
  - Feed Arm a Assy. Removal
    41
    
    Feed Arm B Assy. Disassembly
    41
  - Feed Adjuster Assy. Removal
    42
    
    Feed Adjuster Disassembly
    42
  - Vertical Lever Removal
    42
  - Fpm Holder Assy. Removal
    43
    
    Fpm Disassembly
    43
  - Lower Shaft Assy. Removal
    44
  - Lower Shaft Bushing Removal
    44
  - Bh Switch Assy. Removal
    47
  - Needle Holder Assy. Removal
    49
  - Presser Bar Removal
    51
  - Thread Release Lever Removal
    53
  - Lock Nut Removal
    53
  - Presser Switch Assy. Removal
    53
  - Spool Pin Attachment
    57
  - Bobbin Winder Assy. Attachment
    58
  - Bobbin Base Assy. Attachment
    59
    
    Bobbin Base Assy. Assembly
    59
  - Plate Spring Attachment
    59
  - Needle-Presser Unit Attachment
    60
  - Upper Shaft Assy. Attachment
    61
  - Feed Unit Assy. Attachment
    62
  - Upper Shaft and Lower Shaft Phase Matching
    63
  - Tension Pulley Assy. Attachment
    63
    
    Tension Pulley Assy. Assembly
    63
  - Main Motor Assy. Attachment
    64
    
    Main Motor Assembly
    64
  - Fc Jack Attachment
    64
  - Inlet Assy. Attachment
    64
  - Power Pcb Assy. Attachment
    65
    
    Power Pcb Assy. Assembly
    65
  - Main Pcb Assy. Attachment
    66
  - Upper Cover Thread Guide Attachment
    66
  - Panel Cover Assy. Attachment
    67
    
    Panel Cover Assy. Assembly
    67
  - Sv Keytop Attachment
    68
  - Mode Select Pcb Assy. Attachment
    68
  - Single Light Guide Assy. Attachment
    68
  - Selecting and Manual Buttons Attachment
    69
  - Operation Pcb Assy. Attachment
    69
  - Led Lamp Attachment
    69
  - Ssvr Pcb Assy. Attachment
    71
  - Thread Guide Assy. B Attachment
    71
    
    Thread Guide Assy. B Assembly
    72
  - Thread Guide Assy. a Attachment
    73
    
    Thread Guide Assy. a Assembly
    73
  - Front Cover Assy. Attachment
    74
  - Face Plate a Assy. Attachment
    75
    
    Face Plate a Assy. Assembly
    75
  - Needle Plate B Assy. Attachment
    76
    
    Needle Plate B Assy. Assembly
    76
  - Base Cover Attachment
    76
  - Lower Shaft Bushing Attachment
    79
  - Lower Shaft Assy. Attachment
    79
  - Timing Pulley D Attachment
    79
  - Fpm Holder Assy. Attachment
    80
    
    Fpm Assembly
    80
  - Vertical Lever Attachment
    81
  - Feed Adjuster Assy. Attachment
    82
    
    Feed Adjuster Assy. Assembly
    82
  - Feed Arm a Assy. Attachment
    83
    
    Feed Arm B Assy. Assembly
    84
  - Needle Plate Supporter Shaft B Attachment
    85
  - Fpm Gear Engagement
    86
  - Feed Bar Attachment
    87
  - Shaft Supporter Attachment
    87
  - Outer Rotary Hook Attachment
    87
  - Vertical Adjuster Screw Assy. Attachment
    88
  - Feed Dog Attachment
    88
  - Inner Rotary Hook Bracket Assy. Attachment
    88
- Feed Unit
  89
  - Needle Plate a Assy. Attachment
    89
    
    Needle Plate a Assy Assembly
    89
  - Presser Switch Assy. Attachment
    91
  - Z Pulse Motor Attachment
    91
  - Lock Nut Attachment
    92
  - Thread Release Lever Attachment
    92
  - Presser Foot Lifter Attachment
    93
  - Shaft Bushing Attachment
    93
  - Z Zigzag Cam Attachment
    94
  - Z Zigzag Lever Assy. Attachment
    95
    
    Z Zigzag Lever Assy. Assembly
    95
  - Presser Bar Attachment
    96
  - Needle Holder Assy. Attachment
    97
    
    Needle Holder Assy. Assembly
    98
  - Needle Bar Assy. Attachment
    99
    
    Needle Bar Assy. Assembly
    99
  - Thread Take-Up Lever Link Attachment
    99
  - Thread Take-Up Lever and Needle Bar Crank Attachment
    100
  - Bh Switch Assy. Attachment
    100
  - Lead Wire Assy. Assembly
    101
  - Threader Hook Assy. Attachment
    101
  - Bands Attachment
    101
  - Thread Slider Guide Attachment
    101
4 Adjustment

102
- Adjustment
  103
- Test Mode
  103
  - Starting Test Mode/Starting and Stopping Operation
    103
- Timing Belt Tension
  104
  - Motor Belt Tension
    105
  - Upper Thread Tension
    106
  - Left Base Line Needle Drop
    107
  - Rotary Hook Unit Position
    108
  - Needle Clearance Left/Right
    109
  - Needle Bar Rising
    110
  - Needle Bar Height
    111
  - Clearance between Needle and Rotary Hook Point
    112
  - Needle Threader
    113
  - Presser Bar Height and Parallelism
    114
  - Forward/Backward Feed
    115
  - Bobbin Winder
    116
  - BH Lever Switch Position
    117
  - Needle and Presser Foot Front/Back Position
    118
  - Front/Back and Left/Right Position of Feed Dog
    119
  - Feed Dog Height
    120
  - Inner Rotary Hook Bracket Position
    121
  - Inner Rotary Hook Assy. (Lower Thread) Tension
    122
  - Pattern
    123
5 Failure Investigation for Electronic Parts

124
- Error Message List
  125
- Power Does Not Come on
  126
- Pulse Motors Do Not Return to Starting Position
  127
- Pattern Cannot be Selected
  128
- Main Motor Does Not Turn
  129
- Main Motor Rotation Abnormal
  131
- Cannot Sew Pattern Correctly
  132
- Cannot Sew Button Hole Correctly
  133
- Problems with Vertical Needle Movement and Reverse Stitching
  134
- Does Not Operate When the Foot Controller Is Used
  135
- Bobbin Winding Cannot be Done
  136
- LED Lamp Does Not Come on
  137
- LCD Display Is Not Normal
  138
- Buzzer Does Not Sound
  139
- Error Is Displayed
  140
  - Special Instructions of Wiring
    152

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