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trimming potentiometer
Layout of circuit board
MD 4 VARIO-SP:
1. Unscrew and remove
the handles.
2. Unscrew the cover
plate.
3.
Remove the cover
plate.
Reassemble the cover
plate after having com-
pleted the changes.
size 1
2x
5
4x
terminal board (ST1A / ST1B), connection of control line
(supply voltage and control signal; see print on the circuit board)