Pfaff 1540 User Manual
Page 96
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54. Changing the circuit board in foot control AE 010
Removal:
z
Turn the foot control so that it is resting on pedal 175.
z
Insert a screwdriver with a wide blade on the side opposite to the cables (fig. 119).
z
Turn the screwdriver while removing pedal 175 upwards.
z
Carefully remove cables 177 from the circuit board (fig. 119).
z
Remove pressure piece 174 and spring 173.
z
Remove the two Phillips screws 176.
z
Remove the complete circuit board.
Refitting:
z
Insert the complete new circuit board making sure that the switch fits into the guide of the pre-selection
slide.
z
Insert the two Phillips screws 176 and firmly tighten.
z
Turn the potentiometer counter-clockwise until the crank journal is at the top.
z
In this position insert spring 173 and pressure piece 174.
z
Connect cables 187 to the printed circuit board.
z
Refit pedal 175.
z
Use a screwdriver with a wide blade to press the pedal a little aside and insert it downwards.
z
Carry out a functional test.
z
Carry out an electrical safety test in accordance with VDE 0701 using testing appliance ABB Metrawatt
M 5013.