Owner's Manual

14. Troubleshooting
57
BAS-343E
50
12



13
5
Check RemedyProblem Cause
Page
Unstable upper thread
length
Unstable needle up
stop position
Electrical trouble
Inadequate adjustment
of V belt tension
Fixed knife is blunt.
Needle up stop position
fluctuates.
Improper adjustment
of sub tension
Improper tension and height
of thread take-up spring
Thread take-up spring
tension and height
sub tension
See "Unstable needle up
stop position."
Fixed knife blade
Tension pulley position
Refer to the details for [E.22]
in the error code table.
Adjust the tension and
height of the thread
take-up spring.
Adjust the sub tension.
Sharpen or replace the
fixed knife.
Adjust the tension of the
V beit using the tension
pulley.