Adjusting the potentiometer
Service Instructions 867 - 04.0 - 10/2019 83
17 Adjusting the potentiometer
The potentiometer adjusts the s.p.m. to the set sewing foot stroke and
reduces the s.p.m. if the sewing foot stroke is too much.
Proper setting
After accessing the technician level and pressing the OK button, the left
display will show 1 in the first instance and the relevant maximum speed
next to it.
Fig. 68: Adjusting the potentiometer (1)
To adjust the potentiometer:
1. Switch off the machine.
2. Disassemble the arm cover ( p. 15).
3. Keep the buttons P (2) and Reset (4) pressed down simultaneously
and switch on the machine when doing so.
The display starts.
4. Release the buttons P (2) and Reset (4).
The display indicates the current level.
The potentiometer is set at technician level t 10 04.
If the display indicates a different level:
5. Calling the technician level using the Plus/Minus buttons (3):
As the case may be, press the Plus or Minus button below the letter
or the number until the display indicates t1004.
6. Press the OK button.
(1) - ESC button
(2) - P button
(3) - Plus/Minus buttons
(4) - Reset button
(5) - OK button
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