Firepower, a Thermadyne Company FIREPOWER FP-82 - Manual (Page 45)

Manual 0-2871 5-13 REPAIRS & REPLACEMENT PROCEDURES
c. Ensure that the top edge of the Shroud does
not hit the bottom edge of the CD PC Board.
Stand the Heatsink Shroud Assembly against
the Power Supply.
I. Main Transformer Replacement
1. Disengage the Heatsink Shroud per Paragraph H.
2. Disconnect wires #27 and 32, connected to termi-
nals E27 and E32 on the Main Power PC Board.
Pull these wires through the hole in the center chas-
sis.
3. Remove the Main Transformer as follows:
a. Lift the Main Transformer slightly and swing
the left edge away from the center chassis. Pull
the right edge of the Transformer away from
the center chassis.
b. Lift the Transformer out of the Power Supply
through the opening at the rear of the Power
Supply.
4. Position the replacement Main Transformer behind
the Heatsink Shroud Assembly. Position its wires
at the right edge (as you face it) of the transformer.
5. Install the replacement transformer as follows:
a. Pass the tabs on the right edge of the base of
the transformer into slots in the center chassis
of the Power Supply.
b. Swing the transformer against the chassis, and
pass the tabs on the left edge of the base into
slots in the chassis. Press the transformer
downward to lock it into position.
c. Check for proper installation; the transformer
should remain securely in place.
6.. Pass wires #27 and 32 through the hole in the cen-
ter of the main chassis. Connect wire #27 to termi-
nal E27 and wire #32 to terminal E32 on the Main
Power PC Board.
7. Replace the Heatsink Shroud Assembly per sub-
section K.
J. Output Inductor Assembly Replacement
1. Disengage the Heatsink Shroud per paragraph H.
2. Disconnect the wires to the thermal switch on the
Output Inductor.
3. Remove hex nuts at the left forward and right rear
corners of the Inductor base.
4. Remove the Inductor as follows:
a. Note the position of the wires leading from the
Inductor.
b. Lift out the Inductor through the opening at
the rear of the Power Supply. It may be neces-
sary to lift the Main Transformer slightly to cre-
ate room for the Inductor to pass through the
rear opening.
5. Install the replacement Inductor.
a. Put the replacement Inductor in place, with the
wires oriented the same way as the original In-
ductor.
b. Secure the Inductor in place with hex nuts at
opposite corners of the Inductor base.
6. Reconnect the wires to the thermal switch on the
Output Inductor.
7. Replace the Heatsink Shroud per paragraph K.
K. Heatsink Shroud Assembly Replacement
1. Pass transformer wires #45 and 49 through the up-
per hole in the right (rear) edge of the Heatsink
Shroud. Pass transformer wires #47 and 52
through the lower hole.
2. Route wires as follows:
a. Pass the red wires from the output inductor
through the upper hole in the right (rear) edge
of the Heatsink Shroud.
b. Pass the black wires from the output inductor
through the lower hole in the right (rear) edge
of the Heatsink Shroud. Refer to Appendix 11,
Power Output Board Layout.
c. Pass the wires from the temperature switch on
the Output Inductor through the upper hole in
the Shroud.