Lincoln Electric PRECISION TIG SVM186-A Service Manual page 58

F-18
PROCEDURE
1. Remove main supply power to the machine.
2. Using the 3/8" nutdriver remove the case wrap-
around cover.
3. Locate plugs J3 and J4 on the
control board. See Figure F.2.
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 225 ON.
5. Using the voltmeter carefully test for the correct
transformer secondary voltages per Table F.1.
TROUBLESHOOTING AND REPAIR
T1 TRANSFORMER TEST (continued)
Plugs J3 & J4 on Control Board
FIGURE F.2 –
PRECISION TIG 225 CONTROL BOARD
PRECISION TIG® 225
F-18
PIN 7 (LEAD #210)
PIN 8 (LEAD #209)
PIN 3 (LEAD #204)
PIN 4 (LEAD #201)
PIN 3 (LEAD #232)
PIN 2 (LEAD #260)