Pfaff 1540 Manual

A SERVICE OF

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90

50. Changing the motor circuit board on motor types UUS 390 and UUS 393

Note:

Capacitor and master switch must always be replaced with the circuit board.

Removal:

z Remove the motor in accordance with section 49 of this manual.

z Slightly raise the two locking tabs 163 and remove cover 162 (fig. 114).

z Unsolder the two cables at points 168.

z Remove the three screws 165.

z Remove circuit board 164.

Refitting:

z Solder the two cables to points 168 at the top of the new circuit board.

z Insert circuit board 164.

z Insert the three screws 165 in contact pins 167 and firmly tighten.

z Push cover 162 onto one side and allow it to engage on the other.

z Measure the simulated leakage current in accordance with section 58 of this manual.

z Fit the motor in accordance with section 49.

z Carry out an electrical safety test in accordance with VDE 0701 using testing appliance ABB Metrawatt

M 5013.