Lincoln Electric PRO-CUT 25 Service Manual page 66

F-34
INPUT BOARD REMOVAL & REPLACEMENT (continued)
PROCEDURE
1. Remove input power to PRO-CUT 25.
2. Remove carrying handle using a
4mm allen wrench.
3. Using a crescent wrench, carefully
remove the plastic nut from around the
pressure regulator located on the top of
the machine.
4. Using a 7mm nut driver, remove
the case wraparound.
5. Perform Capacitor Discharge Procedure.
CAUTION
Be sure to follow the recommended static-free
methods for handling printed circuit boards.
Failure to do so can result in permanent damage to
the equipment.
TROUBLESHOOTING & REPAIR
FIGURE F.16 Input Board Location
Input Board
PRO-CUT 25
O N PO
W ER
G AS
PR
ES
SU
R E
TH
ER
M AL
SA
O F P U FE
TY
F R G
E
!
20
15
25
12
6. Note the orientation of the input
board to avoid confusion during
reassembly.
7. Carefully label and remove cooling fan
leads from Input Board. Pliers may be
necessary. See Figure F.17.
8. Remove harness plug from lower right
hand corner of board. Pliers may be
necessary. See Figure F17.
9. Directly above the harness in step 8,
there are four leads, CP(2) and AC(2).
Label these leads and remove. Pliers
may be necessary.
10. Using a 7mm nut driver, remove the two
leads from terminals A and B on the
input board. NOTE: The lead posts on
the Input Board are labeled with an "A"
and a "B", so label the lead wires
accordingly upon removal. Be careful
not to misplace washers when bolts are
removed. See Figure F.17.
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