Table Of Contents - Bernina 330 Service And Maintenance Manual

Contents:
Chapter 1 - General information ......................................................................................5
1.1 Safety Regulations .................................................................................................................................. 5
1.2 Cleaning .................................................................................................................................................. 6
1.3 Warning: Dangerous voltage levels! ....................................................................................................... 6
1.4 ESD-related note: Electrostatic Discharge (ESD)................................................................................... 7
1.5 Technical details...................................................................................................................................... 8
1.6 Tools and gauges.................................................................................................................................... 9
1.7 Service panel......................................................................................................................................... 10
Chapter 2 - Electronics ...................................................................................................11
Electronics ................................................................................................................................................... 11
2.1 PCBA-power.......................................................................................................................................... 11
2.2 PCBA-RET ............................................................................................................................................ 11
2.3 PCBA-Base ........................................................................................................................................... 12
2.4 Block Diagram ....................................................................................................................................... 13
2.5 Handling of Electronic Components...................................................................................................... 13
2.5.1 Returning defective electronic components................................................................................... 13
2.5.2 Repairs of electronic components (PCBA's).................................................................................. 13
Chapter 3 - Troubleshooting ..........................................................................................14
Chapter 4 - Replacing of Components ..........................................................................15
4.1 Covers ................................................................................................................................................... 15
4.1.1 Head cover..................................................................................................................................... 15
4.1.2 Power supply ................................................................................................................................. 15
4.1.3 Rear cover ..................................................................................................................................... 16
4.1.4 Bobbin door.................................................................................................................................... 16
4.1.5 Front cover..................................................................................................................................... 17
4.2 Electronics and sensors ........................................................................................................................ 18
4.2.1 PCBA-base .................................................................................................................................... 18
4.2.2 PCBA-Ret....................................................................................................................................... 19
4.2.3 PCBA-Buttonhole sensor ............................................................................................................... 19
4.2.4 PCBA-power .................................................................................................................................. 20
4.3 Mechanical Components....................................................................................................................... 21
4.3.1 Main motor ..................................................................................................................................... 21
4.3.2 Winder............................................................................................................................................ 21
4.3.3 Stitch width stepping motor (SB) ................................................................................................... 22
4.3.4 Stitch length stepping motor and crank shaft................................................................................. 22
4.3.5 Base shaft ...................................................................................................................................... 24
4.3.6 Hook race ring................................................................................................................................ 25
4.3.7 Thread take-up lever cover ............................................................................................................ 26
4.3.8 Regulator spring............................................................................................................................. 26
4.3.9 Needle bar support and take-up lever ........................................................................................... 27
4.3.10 Main shaft and synchronizing disc............................................................................................... 28
Chapter 5 - Settings ........................................................................................................29
5.0 Basics - General Information................................................................................................................ 29
5.1 Belt tensions.......................................................................................................................................... 30
5.1.1 Drive belt ........................................................................................................................................ 30
5.1.2 Base-shaft belt tension .................................................................................................................. 30
5.2 Position of head frame plate/stitch plate in X- and Y-direction ............................................................. 31
5.3 Presser foot settings.............................................................................................................................. 31
5.3.1 Presser foot height......................................................................................................................... 31
5.3.2 Darning foot height......................................................................................................................... 32
5.3.3 Presser foot fixation ....................................................................................................................... 32
5.4 Needle settings...................................................................................................................................... 33
5.4.1 Distance between needle bar and presser foot bar....................................................................... 33
5.4.2 Needle distribution ......................................................................................................................... 34
5.4.3 Zigzag stitch width limiter............................................................................................................... 34
BERNINA International AG · Seestrasse 161 · CH-8266 Steckborn · Switzerland
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