Brother HS-3000, Руководство по обслуживанию

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6 - 8
Repair Manual
13 Cannot sew BH button hole Check that there is no
stitch skipping or
clogging with BH
pattern sewing.
With the BH presser
foot moved the extent
of its range by hand,
confirm that there is
slack on the BH side
and the other side.
• BH is blocked
• BH cannot
switch
• BH switches
part way
through
Bad BH switch lever connecting
point Adjust BH switch lever position
(4-16)
Bad BH lever Replace BH switch assy.
(2-32) (3-47)
BH lever operation drags
BH presser foot button
attachment holder is pulled out
fully Reset range for BH presser foot
button attachment (More back
two marks from maximum
permissible range)
(4-16)
BH switch assy. and main PCB
assy. connector disconnected Plug connector in (3-13)
Bad main PCB assy. Replace main PCB assy.
(2-13) (3-13)
• Becomes
straight line
Bad feed forward / reverse
adjustment Adjust feed forward / backward
(4-14)
14 Bobbin winder
shaft not turning
Bad rubber ring of bobbin winder
assy. Replace rubber ring
(2-19) (3-5)
Bobbin winder
function Operate the bobbin
winder with Schappe
Spun Sewing Thread
#60, and confirm that
there is no uneven
bobbin winding or
abnormal noises.
Check that the amount
of thread wound onto
the bobbin is 80 - 90%
of the bobbin diameter.
Bad BW switch assy. attachment
position Reattach BW switch assy.
(2-19) (3-5)
Bad BW switch assy. Replace BW switch assy.
(2-19) (3-5)
Bad main PCB assy. Replace main PCB assy.
(2-13) (3-13)
Bobbin winding
amount unsuitable Bad bobbin presser adjustment Adjust bobbin presser position
(4-15)
Loose bobbin presser
attachment screw
Bobbin winder
winds unevenly Bad bobbin winder guide assy.
height adjustment Adjust bobbin winder guide
assy.
(4-15)
Loose bobbin winder guide
assembly screw
15 Foot controller not
effective
Bad foot controller Replace foot controller Foot controller
function Run the sewing
machine using the foot
controller, and check
that the sewing
machine speed
changes according to
the amount it is
pressed down.
FC jack assy. and main PCB
assy. connector disconnected Plug connector in (3-13)
Bad FC jack assy. contact point Replace FC jack assy.
(2-15) (3-11)
Bad main PCB assy. Replace main PCB assy.
(2-13) (3-13)
Problem Primary factors and causes Repair method Items for
Inspection
Inspection method
and standards