Husqvarna Sapphire sewing machine service manual
This is a comprehensive manual needed for service and adjustment of the machine
Directions for use …………………………………………………………………………………………………………………. 4
Service tools …………………………………………………………………………………………………………………………. 5
Settings ………………………………………………………………………………………………………………………………… 6
Settings – Quick reference ………………………………………………………………………………………………………. 7
1. Belt tension -drive belt …………………………………………………………………………………………………….. 10
2. Belt tension -motor belt …………………………………………………………………………………………………… 10
3. The play of the hook gear ……………………………………………………………………………………………….. 11
4. Setting the hook in relation to the feeding eccentric (After feeding) …………………………………… 12
5. The gap between the needle and the hook ………………………………………………………………………. 13
6. Setting the needle plate (the hook cover) in relation to the needle in the feeding direction. … 14
7. Setting the feed dog in relation to the needle plate ……………………………………………………………. 15
8. The height of the hook ……………………………………………………………………………………………………. 16
9. Feed dog height ……………………………………………………………………………………………………………… 17
10. Setting the needle in centre position ………………………………………………………………………………… 18
11. The needle bar height ……………………………………………………………………………………………………… 20
12. The timing of the hook in relation to the needle ……………………………………………………………….. 21
13. Needle threader stop ……………………………………………………………………………………………………….. 22
14. Threading device …………………………………………………………………………………………………………….. 23
15. Presser foot parallelism to the feed dog ……………………………………………………………………………. 24
16. Presser foot height to the needle plate ……………………………………………………………………………… 24
17. Pivot height ……………………………………………………………………………………………………………………. 25
18. Stitch length balance basic setting …………………………………………………………………………………….. 26
19. Stitch length balance ……………………………………………………………………………………………………… 27
20. Lower thread tension (thread tension of the bobbin case) …………………………………………………. 28
21. Thread tension releaser 830 850 ……………………………………………………………………………………….. 29
22.Upper thread tension 830 850 ………………………………………………………………………………………….. 30
23. Upper thread tension 870 – Setting point 1 ………………………………………………………………………. 31
24. Upper thread tension 870 – Setting point 2 ………………………………………………………………………. 32
25. Upper thread tension 870 – Setting point 3 ………………………………………………………………………. 33
26. Upper thread tension 870 – Setting point 4 ………………………………………………………………………. 34
27. Setting the thread take-up spring ……………………………………………………………………………………… 35
28. Disconnection when winding the bobbin …………………………………………………………………………. 36
Service program Sapphire ……………………………………………………………………………………………………. 37
Functions of the service menu 1 – Step motors ………………………………………………………………………. 38
Functions of the service menu 2 – Display and Sensor ……………………………………………………………. 39
Functions of the service menu 3 – Test patterns …………………………………………………………………….. 40
Functions of the service menu 4 – Info and Test patterns ……………………………………………………….. 41
Functions of the service menu 5 – Key Board Test …………………………………………………………………. 42
Front Lid …………………………………………………………………………………………………………………………….. 43
Rear cover ………………………………………………………………………………………………………………………….. 43
Front cover…………………………………………………………………………………………………………………………. 44
Base Plate…………………………………………………………………………………………………………………………… 45
Power supply ……………………………………………………………………………………………………………………… 46
Circuit board – Circuit diagram Sapphire 850/830 …………………………………………………………………… 47
Circuit board – Circuit diagram Sapphire 870 …………………………………………………………………………. 48
Tension unit ……………………………………………………………………………………………………………………….. 49
Tension unit – Replacement of the tension discs 830/850 ……………………………………………………….. 50
Tension unit – Replacement of the tension discs 870………………………………………………………………. 51
Tension unit – Replacement of the Stepmotor 870 ………………………………………………………………….. 52
Sewing head ………………………………………………………………………………………………………………………. 53
Step motor of the needle ……………………………………………………………………………………………………… 54
Step motor of the Presser bar ……………………………………………………………………………………………….. 55
Presser bar bushing ……………………………………………………………………………………………………………… 56
Needle bar bushing ……………………………………………………………………………………………………………… 57
Sewing head re-building ………………………………………………………………………………………………………. 58
Arm shaft. …………………………………………………………………………………………………………………………… 61
Hook cover compl. 830 850 ………………………………………………………………………………………………… 62
Hook cover compl. 870 ……………………………………………………………………………………………………….. 63
Replace thread cutter knife 870 …………………………………………………………………………………………….. 64
Hook complete …………………………………………………………………………………………………………………… 65
Feeding unit step motor ……………………………………………………………………………………………………….. 66
Feeding unit ……………………………………………………………………………………………………………………….. 67
Lower Shaft ………………………………………………………………………………………………………………………… 68
Bobbin winding device ………………………………………………………………………………………………………… 69
Threadcutting unit ……………………………………………………………………………………………………………… 70
Remove Thread tension cover ………………………………………………………………………………………………. 71
