Manual 0-2972
5-7
REPLACEMENT PROCEDURES
G. Main PC Board Replacement
Follow the antistatic procedures provided in Subsection
5.02.
1.
Remove cover per Subsection 5.04-A.
2.
Remove the Logic PC Board per Subsection 5.06-D.
3.
Remove the POT/LED PC Board per Subsection
5.05-D.
4.
Disconnect all wire and cable connections to the
Main PC Board, including the connections from
the three smaller PC Boards. Refer to the Main PC
Board Wiring Diagrams in the Appendix pages if
necessary.
5.
Remove the two long Transformer screws securing
the Auxiliary Transformer to the Center Chassis.
6.
Remove the other screws securing the PC Board to
the Center Chassis.
7. Carefully remove the original PC Board.
8.
Install the replacement PC Board by reversing steps
above. It may be easier to install the PC Board if the
Power Supply is turned on its right side first. Torque
the screws to 17 inch-pounds (1.9 Nm).
Art # A-03909
Auxiliary Transformer
IGBT
Output
Diode
Attachment
Screws
1
3
9
5
4
2
6
7
8
10
11
12
9.
Reconnect all wiring. Refer to the Appendix pages
in this manual for wiring details.
H. EMI Filter Replacement (CE Units Only)
Refer to Subsection 6.05 for parts list and overall detailed
drawing.
WARNING
Disconnect input power at the source and bleed down
the system before attempting these procedures.
1.
Label the input power cable connections and the
cable connections to the main input contactor.
2.
Disconnect all wire and cable connections to the
EMI Filter.
3.
Remove the hardware securing the EMI Filter. This
hardware passes upward through the base of the
power supply.
4.
Put the replacement EMI Filter in position and se-
cure it with the hardware removed in Step 3.
5.
Connect the input power cables and the cable con-
nections to the main input contactor.
6.
Test the Power Supply for proper operation.
