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37. Changing the lower stepping motor 84
38. Changing the SD motor unit 86
39. Ajusting the toothed rocker 90
40. Changing the buttonhole sensor 94
41. Changing the thread monitor with free-arm cover 96
42. Changing the needle threader 98
Upgrade of the performance 2054
43. Upgrade from a PC via a serial interface on the machine 99
44. Calibrating the Touch panel 100
45. Calibrating the knee lift potentiometer 100
Important special functions of the performance 2054
46. Display contrast 101
47. Version number and status 101
48. Programmed patterns 102
49. Options for messages 102
50. Delete the mashine memory 102
51. Demonstration 102
Machine test
52. Test program 103
Test start
53. Display 103
54. Buttons 103
55. Touch panel 104
56. Signal generator 104
57. Foot control 105
Stepping motors
58. Sewing unit 105
58. Presser foot unit 105
59. Buttonhole control 106
60. Synchronizer 107
61. Machine motor 108
62. Bobbin thread monitor 108
63. Overload protection 109
All tests 109
Test end / Test result 109
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