Test Procedures - Lincoln Electric SQUARE WAVE TIG 175 Service Manual

F-18
TEST PROCEDURE
1. Remove main supply power to the
machine.
2. Using the 3/8" nutdriver remove the
case wrap-around cover.
3. Locate plug J6 on the control board.
See Figure F.2.
J1
PIN 4 (LEAD #204)
TROUBLESHOOTING & REPAIR
T1 TRANSFORMER TEST (continued)
J2
PIN 10 (LEAD #201)
J6
FIGURE F.2 PLUG J6 ON CONTROL BOARD
SQUARE WAVE TIG 175
4. Carefully apply the correct input
power making certain the reconnect
configuration at the input switch is
correct for the input voltage applied.
Turn the TIG 175 ON.
5. Using the voltmeter carefully test for
the correct transformer secondary
voltages per Table F.1.
S-W TIG 175 CONTROL
PIN 7 (LEAD #230)
PIN 6 (LEAD #209)
PIN 1 (LEAD #210)
PIN 2 (LEAD #232)
F-18
G2986-[ ]