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REMOVAL PROCEDURE
ELECTRIC SHOCK can kill.
High voltage is present when input power is applied to
the machine.
NOTE: Cut cable ties as needed to improve access.
PREPARATION
1. Disconnect main input power from the machine.
2. Remove the case side panels using a 3/8 in. nut-
driver.
3. Perform the Chopper Board Capacitor Discharge
Procedure.
4. Remove the case top using a 3/8 in. nutdriver.
5. Remove gun.
6. Remove work lead from output stud.
CASE FRONT ASSEMBLY REMOVAL
7. Remove the case front assembly as follows:
a. Using a phillips head screwdriver, remove the 2
screws holding the line switch to the case front.
b. Using a 5/16 in. nutdriver, remove 10 screws hold-
ing the case front to the to the machine base and
center assembly.
c. Lift the case front upward and forward slightly, then
disconnect plug J34 from the MSP3 mode select
panel. The case front assembly can now be
removed. See Figure F.13.
TROUBLESHOOTING & REPAIR
F-47 F-47
POWER MIG 300
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MAIN TRANSFORMER AND OUTPUT CHOKE REMOVAL AND
REPLACEMENT (continued)
WARNING