Dürkopp Adler 669 Serviceanleitung Seite 97

2.15.3 Check the potentiometer adjustment
1
–
Keep the key "P" pressed and turn on the main switch.
–
Enter the technician level.
–
Select the parameter "F-188".
–
Actuate the key "E".
The current Speedomat grade and the corresponding sewing speed
limitation are displayed.
–
Set the setting wheel 1 to "lowest lift stroke".
The display should indicate the Speedomat grade "07".
–
Set the setting wheels 1 and 2 to "maximum lift stroke".
The display has to indicate the Speedomat grade "21".
For the sewing speed the display indicates "EEEE".
Please note:
If the Speedomat grades "07" and "21" cannot be attained the
potentiometer must be readjusted.
2
GB
43