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Brother Manuals
Sewing Machine
DB2-B791
Service manual
Table Of Contents - Brother DB2-B791 Service Manual
High speed single needle feed lock stitch machine with automatic thread trimmer
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Also See for DB2-B791
:
Instruction manual
(12 pages)
,
Instruction manual
(25 pages)
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Table Of Contents
56
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
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Table of Contents
Contents
2
Specifications
4
Installation
5
Machine Head
5
Knee Lifter Bell Crank Stopper
5
Belt
5
Operation
6
Lubrication
6
Pressure On Materials
6
Needle
7
Threading
7
Stitch Length
8
Thread Tension
8
Thread Take-Up Spring
8
Sewing Speed Setting
9
Sensor Sensivity Setting
9
Needle Stop Position Setting
9
Correction Stitching Setting
9
Sewing Examples
10
Name Tag Attaching
11
Flap Sewing
11
Mechanical Descriptions
12
Feed Lock Mechanism
12
Needle Feed Mechanism
12
Feed Regulation Mechanism
13
Lubrication Mechanism
14
Upper Shaft Lubrication
14
Lower Shaft Lubrication
15
Pump Construction
15
Thread Trimmer Mechanism
16
Moveable Knife Holder Action
17
Thread Trimming Complete Stop
17
Thread Trimming Safety Device
17
Needle And Bobbin Threads Trimming
18
Tension Release
19
Thread Wiper (Subclasses -400,-900)
19
Automatic Presser Bar Lifter (Subclasses -900)
20
Machine Covers
21
Disassembling
21
Needle Bar Mechanism
21
Presser Foot Mechanism
22
Rotary Hook Mechanism
22
Thread Trimmer Mechanism Disassembly
23
Feed Mechanism Disassembly
24
Feed Mechanism Assembly
25
Wick Insertion Assembly
26
Thread Trimmer Mechanism Assembly
27
Thread Trimmer Timing Adjustment
28
Thread Trimming Clutch Position
28
Movable Knife, Fixed Knife Position
28
Rotary Hook Mechanism Assembly
29
Presser Foot Mechanism Assembly
30
Needle Bar Mechanism Assembly
30
Machine Covers Assembly
31
Needle Bar Height Adjustment
32
Rotary Hook Position Adjustment
32
Feed Timing Adjustment
33
Feed Dog Height And Angle Adjustment
34
Forward And Reverse Feed Stitch Length
35
Synchronizer Adjustment
36
Up Needle Stop Position Adjustment
36
Fixed Knife And Movable Knife Removal
37
Servo Solenoid Adjustment
38
Potentiometer Adjustment (B7910)
39
Spring Installation (B7910)
40
Feed Mechanism Weight Check (B7910)
40
Sensor Replacement (B7910)
41
Sensor Position Adjustment
42
Indication Adjustment Of The Distance Between The Needle Hole And The Sensor (B7910)
43
Solenoid Replacements
44
Thread Trimming Solenoid
44
Servo Solenoid
44
Thread Wiper Solenoid, Thread Wiper Switch
45
Thread Wiper Installation
46
Thread Wiper Adjustment
46
Photo-Cell And Reflection Sensor Replacement (B7910)
47
Photo-Cell Replacement
47
Troubleshooting Machine Head
50
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