Pfaff 1540 User Manual
Page 92
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.