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n Cause

Incorrect upper threading

If the upper thread is incorrectly threaded, the

upper thread passed through the fabric cannot be

firmly pulled up and the upper thread becomes

tangled in the bobbin case, causing a rattling noise�

n Remedy/check details

Remove the tangled thread, and then correct the

upper threading�

Remove the tangled thread� If it cannot be

removed, cut the thread with scissors�

* For details, refer to "Cleaning the race" (page 24)�

Remove the upper thread from the machine�

Correct the upper threading by following the

instructions in "Upper threading" (page 9)�

* If the bobbin was removed from the bobbin case,

refer to "Winding/Installing the bobbin" (page 7)

to correctly install the bobbin�

Incorrect thread tension

n Symptoms

1� The bobbin thread is visible from the right side of

the fabric� (Refer to the illustration below�)

2� The upper thread appears as a straight line on the

right side of the fabric�

3� The upper thread is visible from the wrong side

of the fabric� (Refer to the illustration below�)

4� The bobbin thread appears as a straight line on

the wrong side of the fabric�

5� The stitching on the wrong side of the fabric is

loose or has slack�

 Symptom 1

1 Wrong side of fabric

2 Bobbin thread visible from right side of fabric

3 Upper thread

4 Right side of fabric

5 Bobbin thread

6 Upper thread visible from wrong side of fabric

n Cause/remedy/check details

 Cause 1

The machine is not correctly threaded�

The bobbin threading is incorrect�

Return the thread tension dial to "4", and then

refer to "Winding/Installing the bobbin" (page

7) to correct the threading�

The upper threading is incorrect�

Return the thread tension dial to "4", and then

 Symptom 3

refer to "Upper threading" (page 9) to correct

the upper threading�

 Cause 2

A needle and thread appropriate for the fabric

are not being used�

The machine needle that should be used

depends on the type of fabric sewn and the

thread thickness�

If a needle and thread appropriate for the fabric

are not being used, the thread tension will not be

adjusted correctly, causing wrinkles in the fabric

or skipped stitches�

* Refer to "Fabric/Thread/Needle Combination" (page

12) to check that a needle and thread appropriate

for the fabric are being used�

 Cause 3

An appropriate upper tension is not selected�

Select an appropriate thread tension�

Refer to "Thread tension" (page 17)�

The appropriate thread tension differs depending

on the type of fabric and thread being used�

* Adjust the thread tension while test sewing on a

piece of scrap fabric that is the same as that used in

your project�

Note

• If the upper threading and bobbin threading

are incorrect, the thread tension cannot be

adjusted correctly� Check the upper threading

and bobbin threading first, and then adjust the

thread tension�

• If the bobbin thread is

visible from the right

side of the fabric

Turn the thread tension

dial counterclockwise to

loosen the upper thread

tension�

• If the upper thread is

visible from the wrong

side of the fabric

Turn the thread tension

dial clockwise to tighten

the upper thread tension�

Fabric is caught in the machine

and cannot be removed

If the fabric is caught in the machine and cannot be

removed, the thread may have become tangled under

the needle plate� Follow the procedure described

below to remove the fabric from the machine� If

the operation cannot be completed according to

the procedure, instead of attempting to remove it

forcefully, contact your nearest Brother authorized

service center�