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F-48 F-48
CONTROL PC BOARD TEST (continued)
FIGURE F.15 – CONTROL PC BOARD LOCATION
TROUBLESHOOTING & REPAIR
TEST PROCEDURE
1. Remove input power to the machine.
2. With the 5/16” nut driver, remove the
screws and carefully lower the case front
control panel.
3. Locate the test points on the control PC
board that are called out in the Control PC
Board Voltage Test Points Chart. See
Figure F.15 and the Control PC Board
Schematic.
4. Connect the DC voltmeter to the test
points.
ELECTRIC SHOCK can kill.
• With input power ON,
there are high voltages
inside the machine. Do
not reach into the
machine or touch any
internal part of the
machine while power is
on.
5. Turn on input power to the machine.
SQUARE WAVE TIG 355
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