Selco GENESIS 145, Repair Manual

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6
RECTIFIER BRIDGE 14.10.150 REPLACEMENT PROCEDURE
WARNING:
Work with the power supply plug disconnected from the mains.
If the rectifier bridge is found to have failed, it is recommended when replacing it:
1) Remove the filter board 15.14.43
2) Remove the power board 15.14.44
3) Remove the sheet of SILPAD insulation underneath the MOSFET MF5 (WARNING: The sheet of SILPAD insulation can NOT be re-
used).
4) Clean any high temperature grease off the heat sink.
5) Before unsoldering the rectifier bridge, break open its CASE with pliers so that only the pins of the component are soldered to the power
board.
6) Clean the supports.
7) Fit the new diode bridge.
8) Smear high-temperature grease underneath the rectifier bridge and underneath the power devices MF1-MF-MF3-MF4-MF6-MF7-MF8-
MF9.
9) Position the new sheet of SILPAD insulation under the MOSFET MF5.
10) Before soldering the diode bridge, refit board 15.14.44 and fix the power devices and the rectifier bridge with the appropriate screws
with torque of .Nxm.
11) With the board fitted, solder the pins of the component.
Breaking the diode bridge before unsoldering it is recommended in order to assist the removal operation, thereby avoiding any
excessive heating of the board’s circuits which could be irreparably damaged
NOTE:
If the rectifier bridge has to be replaced, also replace the input switch.
In fact, the failure of the rectifier bridge damages the input switch in many cases.