Janome J30 Service Manual And Parts List page 5

Condition
6. Noisy 1. Backlash between hook gear
operation 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.
7. Deformation 1. Inappropriate feed balance.
pattern
2. Top tension is too strong.
Cause
Eliminate the backlash.
Eliminate the looseness.
See part removal and replacement
"driving motor (DC motor)".
Oil all moving parts.
Eliminate the looseness.
Adjust the feed balancing screw.
See mechanical adjustment
"Top tension".
3
How to fix Reference
P. 29
P. 15
P. 14