Brother International LB7000 Operation Manual - Page 85

List of symptoms

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Troubleshooting List of symptoms Check the following possible problems before requesting service. If the reference page is "*", contact your authorized Brother dealer or the nearest Brother authorized service center. ■ Getting ready Symptom, Cause/solution Reference Cannot thread the needle. Needle is not in the correct position. 6 • Press the "Needle position" button to raise the needle. Needle is installed incorrectly. 22 Needle is turned, bent or the point is dull. 22 Upper threading is incorrect. 17 The needle threader lever is not lowered until it clicks. The needle threader hook is bent and does not * pass through the eye of the needle. The needle threader lever cannot be moved or * returned to its original position. A size 65/9 needle is being used. 19 • The needle is incompatible with the needle threader. Manually pass the thread through the eye of the needle. Bobbin thread does not wind neatly on the bobbin. The thread is not passed through the bobbin 13 winding thread guide correctly. The thread that was pulled out from the bobbin- 15 winding thread guide was incorrectly wound onto the bobbin. The empty bobbin was not set on the pin 13 properly. While winding the bobbin, the bobbin thread was wound below the bobbin winder seat. The thread was incorrectly passed under the pretension disk on the bobbin-winding thread guide. • Remove any entangled thread, and then wind the bobbin. 13, 82 The bobbin thread cannot be pulled up. Needle is turned, bent or the point is dull. 22 Bobbin is set incorrectly. 16 Nothing appears in the LCD. Main power switch is not turned on. 9 The plug of the power cord is not inserted into an 9 electrical outlet. Symptom, Cause/solution Reference The LCD screen is fogged up. Condensation has formed on the LCD screen. - • After a while, the cloudiness will disappear. The operation keys do not respond, or the key response is too sensitive. A glove is worn when the keys are pressed. The keys are pressed with a fingernail. A non-electrostatic touch pen is being used. The sensitivity of the operation keys is not set for the user. 6, 13 The sewing light does not come on. [Light] is set to [OFF] in the settings screen. 12 Embroidery unit does not operate. Embroidery unit is not attached correctly. 58 ■ While sewing Symptom, Cause/solution Reference Machine does not operate. "Start/Stop" button was not pressed. 25 The bobbin winder shaft is pushed to the right. 13 There is no stitch selected. 25 Presser foot is not lowered. 26 "Start/Stop" button was pressed with the foot 26 controller attached. The "Start/Stop" button was pressed while the machine is set for the sewing speed controller to control the zigzag stitch width. 12, 48 Needle breaks. Needle is installed incorrectly. 22 Needle clamp screw is not tightened. 22 Needle is turned or bent. 22 Using improper needle or thread for the selected 21 fabric. Wrong presser foot was used. 23 Upper thread tension is too tight. 29 Fabric is pulled during sewing. - Spool of thread is set incorrectly. 13 APPENDIX 5 83

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Troubleshooting
83
APPENDIX
5
List of symptoms
Check the following possible problems before requesting
service. If the reference page is “*”, contact your authorized
Brother dealer or the nearest Brother authorized service
center.
■
Getting ready
■
While sewing
Symptom, Cause/solution
Reference
Cannot thread the needle.
Needle is not in the correct position.
•
Press the “Needle position” button to raise the
needle.
6
Needle is installed incorrectly.
22
Needle is turned, bent or the point is dull.
22
Upper threading is incorrect.
The needle threader lever is not lowered until it
clicks.
17
The needle threader hook is bent and does not
pass through the eye of the needle.
*
The needle threader lever cannot be moved or
returned to its original position.
*
A size 65/9 needle is being used.
•
The needle is incompatible with the needle
threader. Manually pass the thread through the
eye of the needle.
19
Bobbin thread does not wind neatly on the bobbin.
The thread is not passed through the bobbin
winding thread guide correctly.
13
The thread that was pulled out from the bobbin-
winding thread guide was incorrectly wound onto
the bobbin.
15
The empty bobbin was not set on the pin
properly.
13
While winding the bobbin, the bobbin thread was
wound below the bobbin winder seat.
The thread was incorrectly passed under the
pretension disk on the bobbin-winding thread
guide.
•
Remove any entangled thread, and then wind
the bobbin.
13, 82
The bobbin thread cannot be pulled up.
Needle is turned, bent or the point is dull.
22
Bobbin is set incorrectly.
16
Nothing appears in the LCD.
Main power switch is not turned on.
9
The plug of the power cord is not inserted into an
electrical outlet.
9
The LCD screen is fogged up.
Condensation has formed on the LCD screen.
•
After a while, the cloudiness will disappear.
–
The operation keys do not respond, or the key
response is too sensitive.
A glove is worn when the keys are pressed.
The keys are pressed with a fingernail.
A non-electrostatic touch pen is being used.
The sensitivity of the operation keys is not set for
the user.
6, 13
The sewing light does not come on.
[Light] is set to [OFF] in the settings screen.
12
Embroidery unit does not operate.
Embroidery unit is not attached correctly.
58
Symptom, Cause/solution
Reference
Machine does not operate.
“Start/Stop” button was not pressed.
25
The bobbin winder shaft is pushed to the right.
13
There is no stitch selected.
25
Presser foot is not lowered.
26
“Start/Stop” button was pressed with the foot
controller attached.
26
The “Start/Stop” button was pressed while the
machine is set for the sewing speed controller to
control the zigzag stitch width.
12, 48
Needle breaks.
Needle is installed incorrectly.
22
Needle clamp screw is not tightened.
22
Needle is turned or bent.
22
Using improper needle or thread for the selected
fabric.
21
Wrong presser foot was used.
23
Upper thread tension is too tight.
29
Fabric is pulled during sewing.
–
Spool of thread is set incorrectly.
13
Symptom, Cause/solution
Reference