Brother VX 511, VX 541, VX 561, VX 661 Service Manual
CONTENTS
page
.
HOW TO USE THIS MANUAL
A
.
B TROUBLE AND CHECK POINTS 3
.
Skipping stitches
1
.
Material not feeding
2
3 . Breaking needle
.
4 Heavy running
5 . Machine noise
6
.
Needle sewing over the maximum width
.
Uneaven seems of back and forth at manual
7
.
Improper position of needle drop slot at
8
the max
9 . Needle swing in straight stitch sewing
.
Feeding at bar tack sewing of buttonhole
10
11 . Not smooth working of pattern selecting dial
12 . Imperfect automatic patterns
.
Uneven seams of reverse patterns
13
.
Breaking of upper thread
14
15
.
Breaking of lower thread
.
How to assemble the parts correctly
16
.
HOW TO ADJUST THE ELEMENTS
C
1-1 . Height of presser bar 8
1-2 . Height of presser bar 8
2 . Height of needle bar 8
.
3-1 Clearance between needle and hook point 9
.
3-2 Clearance between needle and hook point 9
4-1 . Position of shuttle hook 10
.
4-2 Position of shuttle hook 10
.
51 Clearance between shuttle driver shaft and race way 11
.
52 Clearance between shuttle driver shaft and race way 11
.
6-1 Position of vertical feed cam 12
6-2 . Position of vertical feed cam 1 2
7.1 . Heightoffeeddog
7-2 . Height of feed dog 13
.
8 Forth seam 14
9-1 . Back and forth seam 14
9.2 . Back and forth seam 14
.
stitch width
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13
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10.1
Back and forth seam at automatic reverse patterns
2
3
3
3
4
4
4
4
5
5
5
5
5
6
6
6
7
.
.
Back and forth seam at automatic reverse patterns
10.2
.
Adjustment of button hole seams
11
.
Needle swing in straight stitch sewing
12.1
12.2 . Needle swing in straight stitch sewing
12.3 . Needle swing in straight stitch sewing
.
13.1 Centering of the needle
.
13.2 Centering of the needle
.
14 Position of feed cam
.
15.1 Setting of maximum stitch width
15.2 Setting of maximum stitch width
.
.
15.3 Setting of maximum stitch width
.
16.1 Position of the maximum needle swing
.
16.2 Position of the maximum needle swing
. ............
Position of the maximum needle swing
16.3
17.1 . Contact of upper shaft gear, pattern cam and feed cam
17.2 . Contact of upper shaft gear, pattern cam and feed cam
17.3 . Contact of upper shaft gear, pattern cam and feed cam
18.1 Sewing timing of the needle
.
.
Sewing timing of the needle
18.2
18.3 . Sewing timing of the needle
19.1A . Clearance between cam finger and pattern cam
19-1 B . Clearance between cam finger and feed cam
20.1A . Position of cam finger for pattern cam
20-1 B . Position of cam finger for feed cam
21.1 . Setting of upper thread tension dial
21.2 . Setting of upper thread tension dial
22 . Adjustment of feed dog movement at buttonhole sewing
.
23.1 Setting of pattern dial
.
23.2 Setting of pattern dial
24.1 . How to take off stitch width, stitch length dial
and arm panel
24.2 . How to take off stitch width, stitch length dial
and arm panel
24.3 . How to take off stitch width, stitch length dial
and arm panel
.
Adjusting of the drive belts
25.1
25.2 . Adjusting of the drive belts
25.3 . Adjusting of the drive belts
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A. HOW TO USE THIS MANUAL
This service manual is compiled for repairing service for
SERIES SEWING MACHINE and consisting of;
B. TROUBLES AND CHECK POINTS
C. HOW TO ADJUST THE ELEMENTS
In case of home
blems brought from consumers will be solved by following the
instruction book, because the causes in many cases are due to
-
use or carelessness. Therefore, we recommend you to refer
mis
to
"
CHECK LIST FOR BETTER SEWING" in the instruction
book before you try to repair.
Suggest to use this manual with "PARTS CATALOGUE
when you try to repair and pick up a point or points.
Model numbers covered by this manual are
VX511, VX541, VX561, VX581
VX611, VX641, VX661, VX681
VX710, VX720, VX740, VX760, VX780
-
use sewing machine, almost all troubles or pro
(Free arm sewing machine)
VX-
"
NOTE:
1.
Set the machine
ELEMENTS
elements.
STITCH WIDTH REGULATOR
STlCH LENGTH REGULATOR.
NEEDLE POSITION SELECTOR.
-
2.
Adjust following numbers in circle in each instruction.
3.
Symbols used are:
Move the part as this way
Set the clearance as indicated
Move the parts to its highest or
lowest position
"
when there
as
below in "HOW TO ADJUST THE
is
no special instruction on each
. .
.
.
. . .
.O (straight stitch)
.
. .
.
.
.
.O (no feeding)
. . . . .
.M
(center)
tl
+
L
t
T
1
VX516, VX546, VX566, VX586
VX616, VX646, VX666, VX686
(Flat bed sewing machine)
B.
TROUBLES
AND
CHECK
POINTS
TROUBLE AND CAUSE
1.
SKIPPING STITCHES
(1) Incorrect setting of the needle
(2)
Bent or blunt needle
(3) Incorrect upper threading
(4) Improper height of the needle bar
(5) Improper clearance between the needle and
shuttle hook
(6) Improper timing of needle and hook
2.
MATERIAL NOT FEEDING
(1
)
Improper positioning of needle plate
(2) Light pressure on the presser foot
(3) lmproper positioning of feed cam
(4) lmproper positioning of vertical feed cam
(5) lmproper height of feed dog
3.
BREAKING NEEDLE
I
Refer to:
INSTRUCTION BOOK or:
TO CHANGE THE NEEDLE
TO CHECK THE NEEDLE
UPPER THREADING
TO CHANGE NEEDLE PLATE
CORRECTION
Refer to: SERVICE MANUAL (Item No.)
following models
VX511. VX541. VX561. VX581. VX611. VX641. VX661
VX681, VX710, VX720. VX740. VX760. VX780
2
3- 1
-
4
1
VX516, VX546. VX566. VX586
VX616. VXM6. VX666. VX686
2
-
2
3
-
2
4
(1) Incorrect setting of the needle
(3) Improper clearance between the needle and
shuttle hook
(4) Improper
(5) lmproper swing timing of the needle
max. needle swing
---
(
TO CHANGE THE NEEDLE
I
vX710
--
16-1
18
-541.
VX611, VX616
-
1
16-2
-
2
18
2
3 41
VX561. VX581. VX546, VX566. VX586. VX641. VX661
VX681. VX646, VX666. VX686, VX720. VX740. -760. VX780
-
1
16-3
-
18
3-2 & 4-2
3
I
CORRECTION
TROUBLE AND CAUSE
13.
UNEVEN SEAMS OF REVERSE PATTERNS
(1
)
Improper setting of reverse feed devices
14.
BREAKING OF UPPER THREAD
(1 ) Incorrect relation of needle & thread
(2) Bent or blunt needle
(3) Inferior needle eye
(4) Incorrect threading
(5)
Inferior needle slot of needle plate
(6) Upper thread tension too tight
(7)
Scratch on the shuttle hook
15.
BREAKING LOWER THREAD
(1 ) Not smooth running of bobbin
(2) Scratch on tension spring of bobbin case
(3) Scratch on the shuttle hook
(4) Lower thread tension too tight
Refer to:
INSTRUCTION
BOOK or:
Relative chart
Change the needle
Change the needle
Upper threading
Change needle plate
Thread tension
Change the shuttle hook
Change the bobbin
Change the spring
Change the shuttle hook
Thread tension
Refer to: SERVICE MANUAL (Item No.)
following models
VX511. VX541. VX561. VX581. VX516. VX546. VX566. VX586. VX611. VX641
vX710
VX661. VX681. VX616. VX646. VX666. VX686. VX720. VX740. VX760. VX780
9-1
VX720
10-1
VX541. VX561. VX581. VX546, VX566. VX586. VX641, VX661
VX681, VX646. VX666. VX686. VX740. VX760. VX780
9-2
10-2
TROUBLE AND CAUSE Refer to: Refer to: SERVICE MANUAL (Item No.)
16.
HOW TO ASSEMBLE THE PARTS CORRECTLY
~541.~561.
(1) Upper thread tension dial
(2)
Setting of pattern dial
(3) Decoration panel
~-
(4)
Drive belts
CORRECTION
vx710
VX661. VX681. VX616. VX646. VX666. VX686. VX720. VX740, VX760, VX780
21 -1
VX720
23-1
VX710. VX720. VX740
VX760. VX780
251
VX581. VX516. VX546. VX566. VX586. VX611, VX641
-
21 -2
VX541. VX561. VX581. VX546. VX566. VX586. VX641, VX661
VX681. VX646. VX666. VX686. VX740. VX760. VX780
23-2
C.
HOW TO ADJUST THE ELEMENTS
1-1. Height
of
presser bar
VX710
1-2. Height
VX511, VX541, VX561, VX581, VX516
VX546, VX566, VX586, VX611, VX641
VX661, VX681, VX616, VX646, VX666
VX686, VX720, VX740, VX760, VX780
of
presser bar
2. Height
VX511, VX541, VX561, VX581, VX516, VX546
VX566, VX586, VX611, VX641, VX661, VX681
VX616, VX646, VX666, VX686, VX710, VX720
VX740, VX760, VX780
Before adjustment: Set the stitch
width regulator at
needle comes to the right side.
of
needle bar
-
5
(Max.) and check
\q
#$;-
-
0
mm
1
\,;-.
0"
0'
1.0
mm
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