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TROUBLESHOOTING & REPAIR
F-21 F-21
SQUARE WAVE TIG 275
T1 MAIN TRANSFORMER TEST (continued)
FIGURE F.2 – PLUG J8 LOCATION ON CONTROL BOARD
S-W TIG 275 CONTROL
J8PIN 14 (LEAD #212)
PIN 12 (LEAD #232A)
PIN 9 (LEAD #209)
PIN 1 (LEAD #210)
PIN 2 (LEAD #231)
PIN 6 (LEAD #201)
PIN 4 (LEAD #204)
PIN 13 (LEAD #211A)
G3360-[ ]
TEST PROCEDURE
1. Remove main supply power to the machine.
2. Using the 3/8” nut driver, remove the case
left and right side covers.
3. Locate plug J8 on the control board. See
Figure F.2.
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.
4. Carefully apply the correct input power mak-
ing certain the reconnect configuration at the
reconnect panel is correct for the input volt-
age applied. Turn the TIG 275 ON.
5. Using the voltmeter, carefully test for the cor-
rect transformer secondary voltages per
Table F.1.
WARNING