Brother Innov-is NX600, Руководство по обслуживанию

Страница: 207 / 214

6 - 5
Repa
ir
Manual
Repair Manual
12 Bad feed adjustment Adjust the feed (4-17) Feed Check that the
difference in forward
and reverse feed is
within 10 mm in the
feed forward/reverse
adjustment.
(4-17)
Bad presser dial position Set presser dial to 3 (standard
setting)
(3-57)
Setting of presser
dial Check that each
notches function work
properly and presser
dial is set to 3(standard
setting)
Malfunction of presser bar Replace needle-presser module
(3-4)
Operation of
presser bar Check that presser bar
pressure is effective
when presser dial is set
to 1 and lower presser
foot lifter slowly. (Check
that there's some
resistance when lower
feed dog and insert a
paper between needle
plate and presser foot,
and then pull the paper
out of them.)
(4-13)
13 Sewing sounds
Inappropriate
sounds
Operating noise Check that there is no
abnormal noise at fast,
middle and slow speed
in 3 point drop (test
mode 3).
• Thread take-
up noise
Thread take-up lever shaft noise
• Loose screws Retighten the thread take-up
lever shaft
(3-47)
• Outer rotary
hook vertical
rattle noise
Outer rotary hook noise
• Outer rotary hook vertical
rattle
Reattach outer rotary hook (3-
70)
• Upper shaft
noise
Upper shaft bushing out of oil Lubricate the sliding surfaces of
the bushing and thread take-up
counter weight
Rattle along the thread take-up
counter weight shaft Reattach the thread take-up
counter weight
(3-46)
• Motor noise Belt too tight Readjust the motor belt (4-7)
Motor fan noise Replace main motor assy. (3-27)
• Lower shaft
noise
Lower shaft axial rattle Reassemble the lower shaft (3-
8)
• Joint noise Lower shaft joint rattle Reassemble the lower shaft joint
(3-8)
• Vertical feed
cam noise
Vertical feed cam out of oil Lubricate the lower shaft B
assy.
(3-67)
• Horizontal
feed arm
noise
Bad horizontal feed arm Replace feed arm A (3-65)
• Noise from
contact
between
needle plate A
and feed dog
Back/front and left/right rattle in
feed dog Reattach the feed dog assy. (3-
73)
Bad feed dog front-back position
adjustment Adjust feed dog front and
back
(4-26)
Bad feed dog left-right
adjustment Adjust feed dog left and right (4-
26)
Needle plate A attachment
position slippage Reattach the needle plate A (3-
73)
Problem Primary factors and causes Repair method Items for
Inspection
Inspection method
and standards