Janome MS5027PR Service Manual page 5

CONDITION
3. BREAKING 1. INITIAL SEWING SPEED IS
UPPER TOO FAST.
THREAD
2. THREAD PATH IS
INCORRECT.
3. NEEDLE IS BENT OR DULL.
4. UPPER THREAD TENSION IS
TOO STRONG.
5. NEEDLE SIZE IS
INAPPROPRIATE FOR
FABRIC.
6. NEEDLE EYE IS WORN.
7. NEEDLE HOLE IN NEEDLE
PLATE IS WORN OR BURRED.
4. BREAKING 1. INCORRECTLY THREADED
BOBBIN BOBBIN.
THREAD
2. TOO MUCH THREAD IS
ON THE BOBBIN.
3. LINT IS STUCK INSIDE THE
BOBBIN HOLDER.
4. THREAD QUALITY IS
TOO LOW.
5. THREAD IS JAMMING
AROUND THE BOBBIN.
5. NEEDLE 1. NEEDLE IS HITTING THE
BREAKS NEEDLE PLATE.
2. NEEDLE IS BENT OR WORN.
3. NEEDLE IS HITTING THE
HOOK.
4. THE FABRIC MOVES WHILE
THE NEEDLE IS PIERCING
IT, OR THE NEEDLE ZIGZAGS
WHILE IN FABRIC.
5. FABRIC IS BEING PULLED TOO
STRONGLY WHILE SEWING.
CAUSE
START WITH MEDIUM SPEED.
USE THE PROPER THREAD
PATH.
REPLACE WITH A NEW NEEDLE.
ADJUST UPPER THREAD
TENSION CORRECTLY.
USE APPROPRIATE NEEDLE
FOR FABRIC AND THREAD
IN USE.
CHANGE THE NEEDLE.
REPAIR THE HOLE OR
REPLACE THE NEEDLE PLATE.
THREAD BOBBIN CORRECTLY.
ADJUST THE POSITION OF
STOPPER.
CLEAN THE HOOK.
CHANGE TO A HIGHER QUALITY
SEWING THREAD.
CLEAR OUT THE JAMMING
THREAD.
SEE MECHANICAL
ADJUSTMENT "NEEDLE
POSITION."
CHANGE THE NEEDLE.
SEE MECHANICAL
ADJUSTMENT "NEEDLE
CLEARANCE TO HOOK."
SEE MECHANICAL
ADJUSTMENT "NEEDLE
SWING."
GUIDE THE FABRIC GENTLY
WHILE SEWING.
3
HOW TO FIX REFERENCE
MS5027PR
P.28, 29
P.24
P.14