Bernina 710 Owner's Manual Page 123
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- Table of contents
- TROUBLESHOOTING
- BOOKMARKS
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122
Troubleshooting
Fault Cause Repair
Troubleshooting
In most cases you will be able to identify and remedy faults by checking the following.
Check if:
⦁
the upper and lower threads are threaded correctly
⦁
the needle is inserted correctly
⦁
the needle size is correct - check the needle/thread table page 16
⦁
the needle tip and shaft are undamaged
⦁
the sewing computer is clean - brush out any thread lint
⦁
the hook race is clean
⦁
any threads are trapped between the tension discs or under the bobbin case spring
Uneven stitch
formation
̶ Upper thread too tight/too slack
̶ Needle blunt or bent
̶ Poor quality needle
̶ Poor quality thread
̶ Needle/thread combination is incorrect
̶ Incorrectly threaded
⦁
reduce/increase upper thread tension
⦁
use new BERNINA quality needle
⦁
use new BERNINA quality needle
⦁
use quality thread (Isacord, Mettler, Gütermann etc.)
⦁
match the needle to the thread size
⦁
check upper and lower thread
Skipped stitches ̶ Incorrect needle system
̶ Needle bent or blunt
̶ Poor quality needle
̶ Needle inserted incorrectly
̶ Incorrect needle point
⦁
use needle system 130/705H
⦁
use new BERNINA quality needle
⦁
use new BERNINA quality needle
⦁
insert needle as far up as it will go
⦁
match the needle point to the texture of the material
Thread is caught
in the area of the
take-up lever
̶ Upper thread breaks If the upper thread breaks and the thread is trapped in the area
of the take-up lever, proceed as follows:
⦁
turn power switch to «0» (off)
⦁
remove the screw 1 on the headframe with the angular Torx
wrench
⦁
pull the headframe at the bottom slighty forward, flip it
upwards a bit and remove it
⦁
remove remnants of thread
⦁
attach headframe and retighten screw
Faulty stitching
Upper thread
breaks
Lower thread
breaks
̶ Remnants of thread between the
tension discs
̶ Incorrectly threaded
̶ Remnants of thread under the bobbin
case spring
̶ Incorrect needle/thread combination
̶ Upper thread tension too tight
̶ Incorrectly threaded
̶ Poor-quality or old thread
̶ Stitch plate or hook tip damaged
̶ Lower thread tension too tight
̶ Stitch hole in the stitch plate has been
damaged
̶ Needle blunt or bent
⦁
fold a piece of thin material and slide the folded edge (not the
raw edges) between the thread tension discs, moving the
material back and forth to clean the right and left side of the
thread tension
⦁
check upper and lower thread
⦁
carefully remove any thread remnants from under the spring
⦁
match the needle according to the thread
⦁
reduce upper thread tension
⦁
check upper threading
⦁
use quality thread (Isacord, Mettler, Gütermann etc.)
⦁
take the sewing computer to the nearest authorized
BERNINA dealer
⦁
increase the upper thread tension
⦁
take the sewing computer to the nearest authorized
BERNINA dealer
⦁
use new needle
1
033805.51.04_2014-02_Manual_B710_EN
- BERNINA 710 1
- Introduction 2
- SAFETY INSTRUCTIONS 3
- IMPORTANT 3
- INFORMATION 3
- DANGER! 3
- WARNING! 3
- SERVICING DOUBLE 4
- INSULATED PRODUCTS 4
- DISCLAIMER 4
- SAVE THESE 4
- INSTRUCTIONS! 4
- Contents 5
- Key to Signs 9
- Accessory 10
- Presser feet 11
- Overview sewing computer 13
- Important sewing information 15
- Needles, threads 16
- Overview needles 17
- Sewing preparation 19
- Presser foot lifter 20
- Vertical spool pin 20
- Winding a bobbin 21
- Threading the upper thread 23
- Changing the needle 23
- Threading the double needle 24
- Threading the triple needle 24
- Thread needle 25
- Changing the presser foot 25
- Stitch plate 26
- Thread tension 27
- Functions 31
- Overview Main Display 33
- Functions - Display 35
- Overview Functions Alphabets 39
- Overview Functions Combi mode 41
- Setup Program 45
- Changing Display settings 46
- Selecting the Display color 47
- Sewing settings 47
- Display Calibration 49
- Altering the winding speed 49
- Monitoring 50
- Information 51
- Reset/Delete user data 54
- Tutorial 55
- Creative consultant 57
- Help program 58
- Practical stitches 61
- Stitch pattern selection 63
- Personal memory permanent 65
- Straight stitch 67
- Triple straight stitch 67
- Triple Zig-Zag 68
- Straight stitch No. 1 69
- Manual darning 70
- Automatic darning 71
- Reinforced darning, automatic 72
- Finishing edges 72
- Double overlock 73
- Top stitching edges 74
- Blind hem 75
- Visible hem 75
- Securing program 76
- Basting stitch 76
- Flat joining seam 77
- Sewing corners 78
- Buttonholes 79
- Important information 80
- Stabilizer 81
- Altering the balance 83
- Programming Buttonholes 84
- Heirloom Buttonhole 88
- Stitch counter buttonhole 88
- Button sew-on program 92
- Eyelet program 93
- Decorative stitches 95
- Cross Stitches 96
- Pintucks 97
- Handlook quilt stitch 100
- For free-motion quilting 101
- ATTENTION! 102
- Functions in the BSR mode 104
- BERNINA Dual Feed 107
- Alphabets 109
- Correcting the combination 110
- Combining lettering 110
- Personal program 112
- Deleting stitch patterns 115
- Combi mode 116
- Deleting Stitch Patterns 117
- Opening a saved combination 117
- Stitch pattern combination 120
- Cleaning 121
- Troubleshooting 123
- Fault Cause Repair 124
- Messages 124
- Overview Stitch patterns 127
- Stitch patterns 128
- Cross stitches 128
- Satin stitches 128
- Ornamental stitches 128
- Heirloom stitches 129
- Novelty Stitches 129
- Quilt stitches 129
- Cyrillic 131
- Hiragana 132
- In partnership with 142
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