Firepower, a Thermadyne Company FIREPOWER FP-82 - Manual (Page 36)

REPAIRS & REPLACEMENT PROCEDURES 5-4 Manual 0-2871
5.06 Left Side Internal Component
Parts Replacement
Refer to subsection 6.05 for Left Side Internal Compo-
nent Replacement Parts and overall detailed drawing.
WARNING
Disconnect primary power from the source before
opening or disassembling the power supply.
A. Fuse Replacement
1. Remove the cover per subsection 5.04-A.
2. Locate the Fuse near the top edge of the Main
Power PC Board and remove the Fuse from the
fuse holder.
3. Install replacement fuse.
4. Reinstall the cover.
B. Main Input Contactor Replacement
1. Remove the cover per subsection 5.04-A.
2. Label all wires connected to the Input Contactor.
3. Disconnect wires to the Input Contactor from the
input cable.
4. Disconnect all other wires connected to the Input
Contactor.
5. Remove the two nuts and washers securing the
Input Contactor to the base of the power supply.
6. Position the replacement Input Contactor with the
row of connectors labeled L toward the rear of the
Power Supply. Fasten in place with the hardware
removed previously.
7. Complete the wiring connections as shown below.
NOTE
It is important that wires are installed correctly, as
shown, to prevent damage to the unit.
8. Reinstall cover.
A-03212
L1 L2 L3 L4
T1 T2 T3 T4
#4
#13
#12
#5
#1
#3
#2
#78
L1
L2
Input
Side
Input Contactor
C. Logic PC Board Replacement
Follow the antistatic procedures in subsection 5.02. The
Logic PC Board connects to the Main PC Board through
an extender board perpendicular to both boards.
1. Remove the cover per subsection 5.04-A.
2. Refer to Section 6.05, Left Side Internal Replace-
ment Parts. Remove the bolts in each corner of
the Logic PC Board.
3. Detach the Logic PC Board and the extender board
from the Main Power PC Board. Detach the ex-
tender board from the Logic Board.
4. Install the replacement Logic PC Board by revers-
ing the above steps. The pins on the right edge of
the Logic PC Board must fully engage the sockets
on the edge of the extender board. The extender
board must fully engage sockets on the Main
Power PC Board.