While you wait for answers, we may have found some information which could help you.
Success
Message
Lervia KH 4000?
how can i fix my lerviakh4000 wont sew?
Lervia Free Arm sewing machine KH4000 ?
my timing needs fixing on my lervia,?
were is the tune up screw on lervia kh 4000?
It won't pick the bottom thread up?
Jammed?
how do fix my lervia kh4000?
Sewing machine issue?
sewing machine wont pick up thread?
How do I unjam my Lervia KH4000 Sewing Machine?
how can i fix my Lervia KH400 sowing machine?