Brother S-710A User manual

SL-710A
DB2-DD7100A
DB2-DD7100
Please read this manual before making any adjustments.
SINGLE NEEDLE DIRECT DRIVE STRAIGHT LOCK STITCHER
WITH THREAD TRIMMER
SERVICE MANUAL

SL-710A
i
This service manual is intended for SL-710A, DB2-DD7100A, DB2-DD7100 ; be sure to read the SL-710A, DB2-
DD7100A, DB2-DD7100 instruction manual before this manual.
Carefully read the “SAFETY INSTRUCTIONS” below and the whole of this manual to understand this product before you
start maintenance.
As a result of research and improvements regarding this product, some details of this manual may not be the same as
those for the product you purchased.
If you have any questions regarding this product, please contact a Brother dealer.
SAFETY INSTRUCTIONS
1. Safety indications and their meanings
This service manual and the indications and symbols that are used on the machine itself are provided in order to ensure
safe operation of this machine and to prevent accidents and injury to yourself or other people.
The meanings of these indications and symbols are given below.
Indications
DANGER The instructions which follow this term indicate situations where failure to follow the
instructions will almost certainly result in death or severe injury.
CAUTION The instructions which follow this term indicate situations where failure to follow the
instructions could cause injury when using the machine or physical damage to
equipment and surroundings.
Symbols
........................................This symbol ( ) indicates something that you should be careful of. The
picture inside the triangle indicates the nature of the caution that must be
taken.
(For example, the symbol at left means “beware of injury”.)
........................................This symbol ( ) indicates something that you must not do.
........................................This symbol ( ) indicates something that you must do. The picture
inside the circle indicates the nature of the thing that must be done.
(For example, the symbol at left means “you must make the ground
connection”.)

SL-710A ii
2. Notes on safety
DANGER
Wait at least 10 minutes after turnin
g
off the
p
ower switch and disconnectin
g
the
p
ower cord from the wall outlet
before o
p
enin
g
the face
p
late of the control box. Touchin
g
areas where hi
g
h volta
g
es are
p
resent can result in
severe injury.
CAUTION
Environmental requirements
Use the sewin
g
machine in an area which is free
from sources of stron
g
electrical noise such as
high-frequency welders.
Sources of stron
g
electrical noise ma
y
cause
problems with correct operation.
Any fluctuations in the power supply voltage
should be within 10% of the rated voltage for
the machine.
Voltage fluctuations which are greater than this
may cause problems with correct operation.
The
p
ower su
pp
l
y
ca
p
acit
y
should be
g
reater than
the re
q
uirements for the sewin
g
machine’s
electrical consumption.
Insufficient
p
ower su
pp
l
y
ca
p
acit
y
ma
y
cause
problems with correct operation.
The ambient tem
p
erature should be within the
range of 5 to 35 during use.
Tem
p
eratures which are lower or hi
g
her than this
may cause problems with correct operation.
The relative humidit
y
should be within the ran
g
e of
45 % to 85 % durin
g
use, and no dew formation
should occur in any devices.
Excessivel
y
dr
y
or humid environments and dew
formation ma
y
cause
p
roblems with correct
operation.
Avoid exposure to direct sunlight during use.
Ex
p
osure to direct sunli
g
ht ma
y
cause
p
roblems
with correct operation.
In the event of an electrical storm, turn off the
p
ower and disconnect the
p
ower cord from the
wall outlet.
Li
g
htnin
g
ma
y
cause
p
roblems with correct
operation.
Installation
Machine installation should onl
y
be carried out b
y
a qualified technician.
Contact your Brother dealer or a qualified electrician
for anyelectricalwork that mayneed to be done.
The sewin
g
machine wei
g
hs more than 36 k
g
.
The installation should be carried out b
y
two or
more people.
Do not connect the
p
ower cord until installation is
complete, otherwise the machine may operate if
the treadle is de
p
ressed b
y
mistake, which could
result in injury.
Be sure to connect the
g
round. If the
g
round
connection is not secure, you run a high risk of
receiving a serious electric shock, and problems
with correct operation may also occur.
When securin
g
the cords, do not bend the cords
excessivel
y
or fasten them too hard with sta
p
les,
otherwise there is the dan
g
er that fire or electric
shocks could occur.
If usin
g
a work table which has casters, the
casters should be secured in such a wa
y
so that
they cannot move.
Use both hands to hold the machine head when
tiltin
g
it back or returnin
g
it to its ori
g
inal
p
osition. If
onl
y
one hand is used, the wei
g
ht of the machine
head ma
y
cause
y
our hand to sli
p
, and
y
our hand
may get caught.
Be sure to wear
p
rotective
g
o
gg
les and
g
loves
when handlin
g
the lubricatin
g
oil, so that no oil
g
ets into
y
our e
y
es or onto
y
our skin, otherwise
inflammation can result.
Furthermore, do not drink the oil under an
y
circumstances, as the
y
can cause vomitin
g
and
diarrhea.
Keep the oil out of the reach of children.
Use a lam
p
which is rated at 6 V AC and 20 W or
less. If a lam
p
with a hi
g
her ratin
g
than this is
used, it could cause the lam
p
wires and the
transformer to overheat and burn out, which could
result in fire.

SL-710A
iii
CAUTION
Sewing
This sewing machine should only be used by
operators who have received the necessary
training in safe use beforehand.
The sewin
g
machine should not be used for an
y
applications other than sewing.
Be sure to wear
p
rotective
g
o
gg
les when usin
g
the
machine.
If goggles are not worn, there is the danger that if
a needle breaks,
p
arts of the broken needle ma
y
enter your eyes and injury may result.
Turn off the power switch at the following times,
otherwise the machine may operate if the treadle is
depressed by mistake, which could result in injury.
When threading the needle
When replacing the bobbin and needle
When not usin
g
the machine and when leavin
g
the machine unattended
If using a work table which has casters, the casters should
besecuredin sucha waysothattheycannotmove.
Attach all safet
y
devices before usin
g
the sewin
g
machine. If the machine is used without these
devices attached, injury may result.
Do not touch an
y
of the movin
g
p
arts or
p
ress an
y
ob
j
ects a
g
ainst the machine while sewin
g
, as this
ma
y
result in
p
ersonal in
j
ur
y
or dama
g
e to the
machine.
Use both hands to hold the machine head when
tiltin
g
it back or returnin
g
it to its ori
g
inal
p
osition. If
onl
y
one hand is used, the wei
g
ht of the machine
head ma
y
cause
y
our hand to sli
p
, and
y
our hand
may get caught.
If an error occurs in machine o
p
eration, or if abnormal
noises or smells are noticed, immediatel
y
turn off the
p
ower switch. Then contact
y
our nearest Brother
dealer or a qualified technician.
If the machine develo
p
s a
p
roblem, contact
y
our
nearest Brother dealer or a qualified technician.
Cleaning
Turn off the
p
ower switch before carr
y
in
g
out
cleaning, otherwise the machine may operate if
the treadle is de
p
ressed b
y
mistake, which could
result in injury.
Use both hands to hold the machine head when tilting it
back or returning it to its original position. If only one hand
is used, the weight of the machine head may cause your
hand to slip,and yourhand may getcaught.
Be sure to wear protective goggles and gloves
when handling the lubricating oil, so that no oil
gets into your eyes or onto your skin, otherwise
inflammation can result.
Furthermore, do not drink the oil under any
circumstances, as they can cause vomiting and
diarrhea.
Keep the oil out of the reach of children.
Maintenance and inspection
Disassembly, assembly, maintenance and inspection
of the sewing machine should only be carried out by a
qualified technician.
Ask your Brother dealer or a qualified electrician to
carry out any maintenance and inspection of the
electrical system.
Turn off the power switch and disconnect the
power cord from the wall outlet at the following
times, otherwise the machine may operate if the
treadle is depressed by mistake, which could
result in injury.
When carrying out inspection, adjustment and
maintenance
When replacing consumable parts such as the
rotary hook and knife
Turn off the power switch before inserting or
removing the plug, otherwise damage to the
control box could result.
Use both hands to hold the machine head when tilting it
back or returning it to its original position. If only one hand
is used, the weight of the machine head may cause your
hand to slip,and yourhand may getcaught.
If the power switch needs to be left on when
carrying out some adjustment, be extremely
careful to observe all safety precautions.
Be careful not to touch your fingers or the lubrication
amount check sheet against moving parts such as
the rotary hook or the feed mechanism when
checking the amount of oil supplied to the rotary
hook, otherwise injury may result.
Use only the proper replacement parts as
specified by Brother.
If any safety devices have been removed, be
absolutely sure to re-install them to their original
positions and check that they operate correctly
before using the machine.
Any problems in machine operation which result
from unauthorized modifications to the machine
will not be covered by the warranty.

SL-710A iv
3. Warning labels
The following warning labels appear on the sewing machine.
Please follow the instructions on the labels at all times when using the machine. If the labels have been removed or
are difficult to read, please contact your nearest Brother dealer.
4. About the ground symbol
There is a ground symbol which is shown on
the control box in the position shown in the
illustration.
If other equipment needs to be grounded,
connect the ground wire to the screw which
is next to this ground symbol.
If the ground connection is not secure, you
run a high risk of receiving a serious shock,
and problems with correct operation may
also occur.
Finger guard
0766M
2
1
Thread take-up cover
Safety devices
Finger guard
Thread take-up cover, etc.
2
1
Ground symbol
Screw
0767M