Brother International DB2-B737 Network Users Manual - English - Page 28

Checking, Machine, Solenoids

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CHECKING THE MACHINE SOLENOIDS 11 Solenoid load of the machine Connector from the machine head Reverse switch Reverse solenoid 12 9 3 0 8 5 10 7 GND Thread wiper solenoid Thread trimming solenoid Presser foot lift connecter Solenoid GND 4 6 1 Knee switch 1. Remove the load connector (12P connector) of the machine from the connector part of the control box. 2. Measure with the tester set in the resistance range xl as follows. ( Machine Head ) •The thread trimming solenoid provided between 4 and 5 is normal if the tester reads approx. 7 ohm. •The thread wiper solenoid provided between 7 and 8 is normal if the tester reads approx. 5 ohm. •The actuator provided between 9 and 12 is normal if the tester reads 0 ohm when pressed, and OO ohm when released. ( Presser Lift ) •The presser lift solenoid provided between 1 and 4 is normal if the tester reads approx. 5 ohm. •The presser lift switch provided between 2-5 is normal if the tester reads 0 ohm when pressed, and OO ohm when released. 2 Hem sensor Hem detection connecter 1 20 4 5 1. Remove the sensor cord (6P connector) from the connector part of the control box. 2. Measure with the tester set in the resistance range as follows. •If the tester, with the x1 range, reads approx. 30-50 ohm at any position between 1 [tester (-) side] and 4 [tester (+) side] , and °C3 at any position between 1 [tester (+) side] and 4 [tester (-) side], they are normal. •If the tester, with the xl range, reads approx. 30 K-50 Kohm at any position between 2 [tester (-) side] and 5 [tester (+) side], and OO at any position between 2 [tester (+) side] and 5 [tester (-) side] , they are normal. * The resistance value might not always be in the range mentioned above because it varies according to the brightness.

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CHECKING
THE
MACHINE
SOLENOIDS
1
1
Solenoid
load
of
the
machine
Connector
from
the
machine
head
Presser
foot
lift
connecter
Reverse
switch
Solenoid
Reverse
solenoid
12
10
9
8
7
5
3
0
Thread
wiper
solenoid
GND
Thread
trimming
solenoid
4
1
Knee
switch
6
GND
1.
Remove
the
load
connector
(12P
connector)
of
the
machine
from
the
connector
part
of
the
control
box.
2.
Measure
with
the
tester
set
in
the
resistance
range
xl
as
follows.
(
Machine
Head
)
•The
thread
trimming
solenoid
provided
between
4
and
5
is
normal
if
the
tester
reads
approx.
7
ohm.
•The
thread
wiper
solenoid
provided
between
7
and
8
is
normal
if
the
tester
reads
approx.
5
ohm.
•The
actuator
provided
between
9
and
12
is
normal
if
the
tester
reads
0
ohm
when
pressed,
and
OO
ohm
when
released.
(
Presser
Lift
)
•The
presser
lift
solenoid
provided
between
1
and
4
is
normal
if
the
tester
reads
approx.
5
ohm.
•The
presser
lift
switch
provided
between
2-5
is
normal
if
the
tester
reads
0
ohm
when
pressed,
and
OO
ohm
when
released.
2
Hem
sensor
Hem
detection
connecter
1
4
2
5
0
1.
Remove
the
sensor
cord
(6P
connector)
from
the
connector
part
of
the
control
box.
2.
Measure
with
the
tester
set
in
the
resistance
range
as
follows.
•If
the
tester,
with
the
x1
range,
reads
approx.
30-50
ohm
at
any
position
between
1
[tester
(—)
side]
and
4
[tester
(+)
side]
,
and
°C3
at
any
position
between
1
[tester
(+)
side]
and
4
[tester
(—)
side],
they
are
normal.
•If
the
tester,
with
the
xl
range,
reads
approx.
30
K-50
Kohm
at
any
position
between
2
[tester
(—)
side]
and
5
[tester
(+)
side],
and
OO
at
any
position
between
2
[tester
(+)
side]
and
5
[tester
(—)
side]
,
they
are
normal.
*
The
resistance
value
might
not
always
be
in
the
range
mentioned
above
because
it
varies
according
to
the
brightness.