Brother International BAS-341F Instruction Manual - English - Page 64

See Unstable needle, fixed knife.

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15. TROUBLESHOOTING Problem Cause Check Remedy Page Improper tension and height of thread take-up spring Thread take-up spring tension and height Adjust the tension and height of the thread takeup spring. 13 Unstable upper thread Improper adjustment of sub tension sub tension Adjust the sub tension. 13 length Needle up stop position See "Unstable needle fluctuates. up stop position". Fixed knife is blunt. Fixed knife blade Sharpen or replace the fixed knife. Unstable needle up stop position Inadequate adjustment of V belt tension Tension pulley position Adjust the tension of the V belt using the tension pulley 5 Electrical trouble Refer to the details for [E. 22] in the error code table. 50 BAS-341F, 342F 57

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15. TROUBLESHOOTING
BAS-341F, 342F
57
Problem
Cause
Check
Remedy
Page
Improper tension and height
of thread take-up spring
Thread take-up spring
tension and height
Improper adjustment of
sub tension
sub tension
Adjust the tension and
height of the thread take-
up spring.
Adjust the sub tension.
13
13
Needle up stop position
fluctuates.
See “Unstable needle
up stop position”.
Fixed knife is blunt.
Fixed knife blade
Sharpen or replace the
fixed knife.
Unstable upper thread
length
Inadequate adjustment
of V belt tension
Tension pulley position
Electrical trouble
Refer to the details for [E.
22] in the error code table.
Adjust the tension of the
V belt using the tension
pulley
5
50
Unstable
needle
up
stop position