Brother International LK3-B432E MKII Instruction Manual - English - Page 68

TROUBLESHOOTING, Not applicable for the B432E Mark II., B432E Mark II only.

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16. TROUBLESHOOTING Problem Cause Check 16. TROUBLESHOOTING Remedy Page *1 Work clamp operation is sluggish. Presser does not rise. Presser lifter amount is too great. *1 Too much friction between presser plate and presser arm lever support. Sliding part of the work clamp lubrication Distance between work clamp and top of needle plate Presser plate and presser arm lever support lubrication Grease the sliging part of the work 36 clamp. Adjust the height of the work clamp to within 17 mm. 36 • 37 Grease the presser plate and presser arm 36 lever support. Presser is contacting thread wiper. Thread wiper standby position Adjust the position of the thread wiper. 39 Presser does not drop. Presser lifter link is not moving back. Link return spring is unhooked. Hook the link return spring properly. Presser lift amount is incorrect. *2 Work clamp does not close. Incorrect position of presser arm lever plate. Incorrect position of presser closing roller. Distance between work clamp and top of needle plate Adjust the work clamp lift amount. 36 • 37 Whether stop lever is engaged with stop position adjustment bar or not Adjust the position of presser closing roller. 38 Thread wiper does not operate correctly. The thread wiper is obstructing the needle. Thread wiper position is incorrect. Clearance beween thread wiper and needle tip Thread wiper position Adjust the height of the thread wiper. 39 Adjust the operating distance of the thread 39 wiper. Lower thread winds to one side. Bobbin winder thread tension stud height is incorrect. Bobbin winder thread tension stud height Adjust the height of the thread tension stud. 24 Lower thread winding amount is incorrect. Bobbin presser position is incorrect. Thread winding amount Adjust the position of the bobbin presser. 24 Stitches being skipped at the sewing start. Refer to "Skipped stitches occur" Refer to "Skipped stitches occer". Threads comes unthreaded. Uneven upper thread length. Upper thread length Adjust the subtension. 26 Upper thread is too short. Thread take-up lever stroke Adjust the thread take-up lever stroke. 34 * 1 Not applicable for the B432E Mark II. * 2 B432E Mark II only. LK3-B430E-, B431E-, B432E-, B433E- Mark II 62

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62
LK3-B430E-, B431E-, B432E-, B433E- Mark II
16. TROUBLESHOOTING
16. TROUBLESHOOTING
Problem
Cause
Check
Remedy
Page
Presser does not rise.
Presser does not
drop.
Presser lift amount is
incorrect.
Work clamp
operation is sluggish.
Sliding part of the
work clamp
lubrication
Grease the sliging
part of the work
clamp.
36
Presser lifter amount
is too great.
Distance between
work clamp and top
of needle plate
Adjust the height of
the work clamp to
within 17 mm.
36
•
37
Too much friction between
presser plate and presser
arm lever support.
Presser plate and
presser arm lever
support lubrication
Grease the presser
plate and presser arm
lever support.
36
Presser is contacting
thread wiper.
Thread wiper standby
position
Adjust the position of
the thread wiper.
39
Presser lifter link is
not moving back.
Link return spring is
unhooked.
Hook the link return
spring properly.
Incorrect position of
presser arm lever
plate.
Distance between
work clamp and top
of needle plate
Adjust the work
clamp lift amount.
36
•
37
Thread wiper does
not operate correctly.
The thread wiper is
obstructing the
needle.
Clearance beween
thread wiper and
needle tip
Adjust the height of
the thread wiper.
39
Thread wiper
position is incorrect.
Thread wiper
position
Adjust the operating
distance of the thread
wiper.
39
Lower thread winds
to one side.
Bobbin winder thread
tension stud height is
incorrect.
Bobbin winder thread
tension stud height
Adjust the height of
the thread tension
stud.
24
Lower thread
winding amount is
incorrect.
Bobbin presser
position is incorrect.
Thread winding
amount
Adjust the position of
the bobbin presser.
24
Stitches being
skipped at the sewing
start.
Refer to "Skipped
stitches occur"
Refer to "Skipped
stitches occer".
Threads comes
unthreaded.
Uneven upper thread
length.
Upper thread length
Adjust the sub-
tension.
26
Upper thread is too
short.
Thread take-up lever
stroke
Adjust the thread
take-up lever stroke.
34
Work clamp does not
close.
Incorrect position of
presser closing roller.
Adjust the position of
presser closing roller.
38
*1
*2
*1
Whether stop lever is
engaged with stop position
adjustment bar or not
*1
Not applicable for the B432E Mark II.
*2
B432E Mark II only.