Janome 2049 Service Manual page 9

CONDITION
6. NOISY 1. BACKLASH BETWEEN
OPERATION SHUTTLE HOOK GEAR AND
LOWER SHAFT GEAR IS TOO
BIG.
2. INAPPROPRIATE BELT
TENSION.
3. NOT ENOUGH OIL.
7. DEFORMATION 1. INAPPROPRIATE NEEDLE
PATTERN SWING TIMING.
2. INAPPROPRIATE
DISENGAGEMENT OF CAM
FOLLOWER.
3. UPPER THREAD TENSION
IS TOO STRONG.
CAUSE
7
HOW TO FIX
SEE MECHANICAL
ADJUSTMENT "CLEARANCE
BETWEEN NEEDLE AND HOOK
(NO.2)".
SEE MECHANICAL
ADJUSTMENT "MOTOR BELT
TENSION".
APPLY OIL.
SEE MECHANICAL
ADJUSTMENT "NEEDLE
SWING".
SEE MECHANICAL
ADJUSTMENT
"DISENGAGEMENT OF CAM
FOLLOWER".
ADJUST UPPER THREAD
TENSION CORRECTLY.
REFERENCE
P.18
P.26
P.28
P.15
P.25
P.12