Brother International MD-817 Service Manual - Page 41

Solenoids

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Ei Solenoids Table ( driving transistor No. & O ) control PCB spec. MK II NBN BAST C0V solenoid brake solenoid transistor No. --__ _ -- resistance of sol.( O ) trimmer solenoid transistor No. resistance of sol. ( O ) TR1 5.3 TR2 TR3 6.7 6.0 wiper solenoid transistor No. . TR3 resistance of sol.( O ) 5.0 -. - - - TR2 8.0 *1 reverse solenoid transistor No. TR5 - - (backtack) resistance of sol. ( O ) 7.4 - - presser foot transistor No. I i f ter solenoid - resistance of sol. ( O ) TR6 - TR6 . - 9.5 - 10.0 tension release transistor No. (TR4) TR4 - - solenoid resistance of sol.( O ) 17.0 - - nipper solenoid transistor No. - TR9 TR3 - resistance of sol.( O ) - 17.0 8.0 - condense solenoid transistor No. resistance of sol.( O ) - TR3 - - 7.7 - TR4 - 200 thread release transistor No. - TR7, 8.9 - - solenoid resistance of sol. ( Q ) - 8.5.8.5 - - spreader thread transistor No. - - - TR2 trimmer solenoid resistance of sol.( O ) - - - 5.7 *2 folder control transistor No. - - - TR5 solenoid , resistance of sol. ( O ) - - - 500 ( ) is not mounted. MK II : Straight lock stitcher with thread trimmer. ( 8737 etc. ) NBN : Straight lock stitcher with thread trimmer with no bird nest and shorter trimmed end. ( B730 ) BAST: Single needle basting lock stitcher with thread trimmer. ( LS2-8883 ) COY : Covering stitcher with thread trimmer. ( FD4-627X group and FD3-825)( group ) *1 : F04-8276, FD3-8256 *2 : FD4-8277. FD3-8257 -37-

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Ei
Solenoids
Table
(
driving
transistor
No.
&
O )
----------____
control
PCB
spec.
solenoid
--__
_
--
MK
II
NBN
BAST
C0V
brake
solenoid
transistor
No.
resistance
of
sol
.
(
O
)
TR1
5.3
trimmer
solenoid
transistor
No.
resistance
of
sol.
(
O
)
TR2
6.7
TR3
6.0
wiper
solenoid
transistor
No.
.
resistance
of
sol.
(
O
)
TR3
5.0
—
.
—
—
—
TR2
8.0
*1
reverse
solenoid
(backtack)
transistor
No.
resistance
of
sol.
(
O
)
TR5
7.4
—
—
—
—
presser
foot
I i
f
ter
solenoid
transistor
No.
-
resistance
of
sol.
(
O
)
TR6
.
-
9.5
—
—
TR6
10.0
tension
release
solenoid
transistor
No.
resistance
of
sol
.
(
O
)
(TR4)
TR4
17.0
—
—
—
—
nipper
solenoid
transistor
No.
resistance
of
sol.
(
O
)
—
—
TR9
17.0
TR3
8.0
—
—
condense
solenoid
transistor
No.
resistance
of
sol.
(
O
)
—
—
TR3
-
7.7
—
—
TR4
200
thread
release
solenoid
transistor
No.
resistance
of
sol.
(
Q
)
—
—
TR7,
8.9
8.5.8.5
—
—
—
—
spreader
thread
trimmer
solenoid
transistor
No.
resistance
of
sol.
(
O
)
—
-
—
-
—
-
TR2
5.7
*2
folder
control
solenoid
transistor
No.
resistance
of
sol.
(
O
)
—
-
—
-
—
-
TR5
,
500
(
)
is
not
mounted.
MK
II
:
Straight
lock
stitcher
with
thread
trimmer.
(
8737
etc.
)
NBN
:
Straight
lock
stitcher
with
thread
trimmer
with
no
bird
nest
and
shorter
trimmed
end.
(
B730
)
BAST:
Single
needle
basting
lock
stitcher
with
thread
trimmer.
(
LS2-8883
)
COY
:
Covering
stitcher
with
thread
trimmer.
(
FD4-627X
group
and
FD3-825)(
group
)
*1
:
F04-8276,
FD3-8256
*2
:
FD4-8277.
FD3-8257
-37-