Bernina 780 - Page 2

BERNINA International AG · Seestrasse 161 · CH-8266 Steckborn · Switzerland 2
Contents:
Chapter 1 – General information ...................................................................................... 3
1.1 Safety instructions ................................................................................................................................... 3
1.2 ESD-related note: Electrostatic Discharge (ESD) ................................................................................... 4
1.3 Tools and gauges. ................................................................................................................................... 5
Chapter 2 – Description of technical details ................................................................... 6
2.1 BERNINA Embroidery module 830 technical specifications. .................................................................. 6
2.2 Cleaning. ................................................................................................................................................. 6
2.3 Block diagram. (Revision 0.8) ................................................................................................................. 7
2.4 PCBs, plugs and cables. ......................................................................................................................... 8
Chapter 4 – Replacing assemblies / parts ..................................................................... 12
4.1 Removing and replacing covers. ........................................................................................................... 12
4.2 Replacing the PCBA-EMB-Main. .......................................................................................................... 14
4.3 Replacing the PCBA-Frame. ................................................................................................................. 15
4.4 Replacing the PCBA-Y-Arm. ................................................................................................................. 17
4.5 Replacing the PCBA-X-Carriage Front resp. X-Carriage Rear. ............................................................ 21
4.6 Replacing the stepping motor Y-Arm. ................................................................................................... 25
4.7 Replacing the stepping motor X-Carriage. ............................................................................................ 27
4.8 Replacing the Y-Arm drive belt. ............................................................................................................ 29
4.9 Replacing the X-Carriage drive belt(s). ................................................................................................. 34
4.10 Replacing the flexible gearwheel / bearing of the X-Carriage drive. ................................................... 36
Chapter 5 – Adjustments ................................................................................................. 40
5.1 Adjustments of X-belts being parallel. ................................................................................................... 40
5.2 Adjustment of belt tension Y-Arm. ......................................................................................................... 43
5.3 Adjustment of X-Carriage belt tension. ................................................................................................. 44
5.4 Adjustment of hoop reference. .............................................................................................................. 44
Chapter 6 – Service Program .......................................................................................... 45
Menu 7 – Embroidery .................................................................................................................................. 45
Chapter 7 – Testing the module using the service test pattern ................................... 55
7.1 Description of possible faults: ............................................................................................................... 55
7.2 Test pattern assessment ....................................................................................................................... 56
Chapter 8 – Lubrication plan .......................................................................................... 57
8.1 Y-Arm .................................................................................................................................................... 57
8.2 X-Carriage ............................................................................................................................................. 60
Chapter 9 – Maintenance Guidelines ............................................................................. 62
Document Revision History ............................................................................................ 62