Changing The Circuit Board In Foot Control Ae - Pfaff Select 1520 Service Manual

54. Changing the circuit board in foot control AE 010

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