Firepower, a Thermadyne Company FIREPOWER FP-82 - Manual (Page 35)

Manual 0-2871 5-3 REPAIRS & REPLACEMENT PROCEDURES
5.05 Front Panel Parts Replacement
Refer to Section 6.04 for Front Panel Replacement Parts
and overall detailed drawing.
WARNING
Disconnect primary power from the source before
opening or disassembling the power supply.
A. Current Control Knob Replacement
1. Turn the Current control knob fully clockwise and
note the location of the pointer on the knob.
2. Loosen the screw securing the Current Knob to the
potentiometer shaft and remove the Current Knob.
3. Place the replacement Current Knob on the poten-
tiometer shaft with the location of the pointer the
same as noted in step 1.
4. Tighten the screw to secure the knob to the poten-
tiometer shaft.
B. ON/OFF Switch Replacement
1. Remove the cover per subsection 5.04-A.
2. Disconnect the four wires on the rear of the ON/
OFF Switch. Note the location of each wire, as
shown below:
A-02774
Wire #21
Wire #24
Top clip
Wire #22
Wire #23
3. Squeeze together the clips on the top and bottom
of the ON/OFF Switch. Remove the Switch
through the Front Panel.
4. Install the replacement ON/OFF Switch by revers-
ing the above steps.
C. RUN/SET Switch Replacement
1. Remove the cover per subsection 5.04-A.
2. Disconnect the two wires on the rear of the RUN/
SET Switch. Note the location of each wire, as
shown:
A-02775
Wire #25
Wire #26
Top clip
3. Squeeze together the clips on the top and bottom
of the RUN/SET Switch, then remove the switch
through the Front Panel.
4. Install the replacement RUN/SET Switch by re-
versing the above steps.
D. POT/LED PC Board Replacement
Follow the antistatic procedures provided in subsection
5.02.
1. Remove the cover per subsection 5.04-A.
2. Remove Current Knob per subsection 5.05-A.
3. Disconnect J Connector from POT/LED PC Board.
4. Remove PC Board from standoffs.
5. Install the replacement POT/LED PC Board by re-
versing the above steps.
E. Work Cable Replacement
1. Remove the cover per subsection 5.04-A.
2. Disconnect the Work Cable from the WORK ter-
minal on the Power Output PC Board, located on
the right side of the unit.
3. Squeeze the top and bottom of the Work Cable
Strain Relief and remove from the Front Panel.
4. Remove Work Cable from the unit.
5. Install the replacement Work Cable as follows:
a. Ensure that the replacement Work Cable passes
through the grommet in the Fan Shroud.
b. Secure the Cable to the Work terminal on the
Power Output PC Board and secure the strain
relief.