Janome 8050 Service Manual page 5

condition
6. noiSy 1. backlaSh between hook
operation gear and lower Shaft
gear iS too great.
2. lower Shaft gear iS
looSe.
3. inappropriate belt
tenSion.
4. not enoUgh oil.
5. Upper Shaft gear iS
looSe.
6. hook iS broken or too
worn.
7. deformation 1. inappropriate feed
pattern balance.
2. top tenSion iS too
Strong.
caUSe
3
how to fix
eliminate the backlaSh.
eliminate the looSeneSS.
See part removal and
replacement "driving motor
(dc motor)".
oil all moving partS.
eliminate the looSeneSS.
See "replacing hook point".
adjUSt the feed balancing
Screw.
See mechanical adjUStment
"top tenSion".
reference
p. 25
p.12
p. 16