Changing The Motor Circuit Board On Motor Types Uus 390 And Uus - Pfaff Select 1520 Service Manual

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:
Remove the motor in accordance with section 49 of this manual.
Slightly raise the two locking tabs 163 and remove cover 162 (fig. 114).
Unsolder the two cables at points 168.
Remove the three screws 165.
Remove circuit board 164.
Refitting:
Solder the two cables to points 168 at the top of the new circuit board.
Insert circuit board 164.
Insert the three screws 165 in contact pins 167 and firmly tighten.
Push cover 162 onto one side and allow it to engage on the other.
Measure the simulated leakage current in accordance with section 58 of this manual.
Fit the motor in accordance with section 49.
Carry out an electrical safety test in accordance with VDE 0701 using testing appliance ABB Metrawatt
M 5013.
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