Singer 7640 CONFIDENCE Instruction Manual and Troubleshooting Guide - Page 36

Needle Threader Not Working, Loud Noise When Sewing, Machine Will Not Run

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24 TROUBLESHOOTING AND MAINTENANCE Troubleshooting 14. NEEDLE THREADER NOT WORKING (for models with built-in automatic needle threader) Possible Cause: Needle not in correct position. Solution: Raise needle to its highest position by turning hand wheel toward you. (See Page 16) Possible Cause: Needle inserted incorrectly. Solution: Needle all the way up in needle clamp (See Page 28) Possible Cause: Needle is bent. Solution: Remove bent needle, insert new needle. (See Page 28) Possible Cause: Hook pin damaged. Solution: Needle Threader needs replacement; contact authorized SINGER® service center: Visit www.singerco.com. 15. LOUD NOISE WHEN SEWING Possible Cause: Thread not in take-up lever. Solution: Rethread the machine, making sure the take up lever is in its highest position so thread goes in the eye of the take up lever - turn machine hand wheel toward you to raise the take up lever to its highest position for threading. (See Page 15) Possible Cause: Thread path obstructed. Solution: Check that thread is not caught on the thread spool or behind the spool cap. (See Page 15) 16. MACHINE WILL NOT RUN Possible Cause: Bobbin winding spindle is engaged when you try to sew. Solution: Disengage bobbin winding spindle. (See Page 13) Possible Cause: Power cord and/or foot control not plugged in correctly. Solution: Make sure power cord/foot control are correctly seated in machine and power supply. (See Page 12) Possible Cause: Wrong bobbins being used. Solution: Use only SINGER® branded bobbins that are same style as those that come with machine. (See Page 11) 36

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36
Troubleshooting
TROUBLESHOOTING AND MAINTENANCE
14.
NEEDLE THREADER NOT WORKING
(for models with built-in automatic needle threader)
Possible Cause:
Needle not in correct position.
Solution:
Raise needle to its highest position by turning hand wheel toward you. (See Page 16)
Possible Cause:
Needle inserted incorrectly.
Solution:
Needle all the way up in needle clamp (See Page 28)
Possible Cause:
Needle is bent.
Solution:
Remove bent needle, insert new needle. (See Page 28)
Possible Cause:
Hook pin damaged.
Solution:
Needle Threader needs replacement; contact authorized
SINGER
®
service center: Visit
www.singerco.com.
15.
LOUD NOISE WHEN SEWING
Possible Cause:
Thread not in take-up lever.
Solution:
Rethread the machine, making sure the take up lever is in its highest position so thread
goes in the eye of the take up lever – turn machine hand wheel toward you to raise the take up
lever to its highest position for threading. (See Page 15)
Possible Cause:
Thread path obstructed.
Solution:
Check that thread is not caught on the thread spool or behind the spool cap. (See Page
15)
16.
MACHINE WILL NOT RUN
Possible Cause:
Bobbin winding spindle is engaged when you try to sew.
Solution:
Disengage bobbin winding spindle. (See Page 13)
Possible Cause
: Power cord and/or foot control not plugged in correctly.
Solution:
Make sure power cord/foot control are correctly seated in machine and power supply.
(See Page 12)
Possible Cause:
Wrong bobbins being used.
Solution:
Use only
SINGER
®
branded bobbins that are same style as those that come with
machine. (See Page 11)